Description:‘VIBRATION ISOLATION SYSTEMS (VIS) TEST SETUP WITH MECHANICAL EXCITER’

FIELD OF INVENTION:
[001] Present invention relates to method of performance testing of different design variants of vibration isolation systems (VIS) for entire range of speed of its operation using a specially designed test set up.

[002] The test set up comprises of mechanical exciter capable of generating desired unbalance force and frequency of vibration mounted on different design variants of resilient mounts to be tested on a support table. More particularly, a specially designed exciter table apparatus using which performance testing of different variants of VIS can be carried out using instrumented sensors for its speed range. Transient response plot captured using instrumented sensor indicates vibration response at resonance and damping for a particular type of VIS mount design variant. Additionally, vibration response at operating speed and transmitted vibration below VIS can be measured using vibration sensor. Based on actual requirement a particular VIS design variant can be selected for use. Thus the methodology described in this present invention can be adopted to select a particular design variant of VIS before being actually installed at site. Weight of the mechanical exciter and tested VIS should have similar static deflection as with target machine for which VIS is to be deployed for better comparison.

BACKGROUND OF INVENTION/PRIOR ART:
[003] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[004] Vibration isolation systems used for reduction of transmission of vibration from machine to the base and vice-versa. In case of simple mass damper system under dynamic excitations two cases may arise. 1st one is excitation force acting on mass and part of it transmitted to base through resilient elements of VIS and 2nd one is dynamic force applied at base and part of it is transmitted at mass through VIS. Transmissibility ratio for both the cases is function of frequency ratio (ratio of excitation frequency to natural frequency) of VIS supported system and damping factor. An isolation effect takes place for frequency ratio (r) > 1.41, where transmissibility ratio <1 and preferably at least r is 3. Sometimes isolation efficiency is also used to indicate effectiveness of VIS. Mathematically, isolation efficiency is derived by subtracting transmissibility ratio from one. The effect of an isolation depends on natural frequency of the system due to spring or resilient elements. Natural frequency of the system is determined by the static deflection. Therefore, isolation of vibration is achieved by supporting the equipment on resilient mounting elements such as springs or rubber which compress under static weight of the equipment. The degree of isolation achieved is directly related to the amount of compression of used resilient elements. The greater the static deflection, the better would be the resulting vibration isolation. When determining the level of isolation efficiency required while selection of VIS; factors to be considered are machine type, weight, operating speed, magnitude and nature of the vibrating forces, location of the machine in the building/structure. For example, an isolation efficiency of 80% is acceptable for a 5kW machine located in the basement but not adequate for more than 100 kW machine installed on a flexible upper-level floor, particularly when adjacent to critical office or residential accommodation. In this case an isolation efficiency close to 97% is preferred. A suitably designed isolated system has to cross a structural resonance before the operating speed, vibration amplification may occur and to avoid excessive vibration in this region damping becomes useful to keep the vibration within limit. In the vicinity of resonance, the viscodampers work approximately proportional to the velocity. There are various design variants of vibration isolators available such as spring type, spring with horizontal and or vertical restraints, spring and damper type, elastomeric, wire coil type etc. Such VIS design variants can have similar static deflection but may behave differently under dynamic loading due to their internal construction or damping characteristics. Some of the VIS design variants have only internal material damping and some of them have external damping. Therefore, even though machine weight, speed, generated unbalance force and static deflection of different VIS design variants may be same, the transient behavior and vibration level at operating speed may differ from one mount to another mount. VIS design variants with external damping arrangement may produce lower vibration at resonance zone while crossing the system critical speed but with higher vibration level at operating speed. Whereas, VIS design variants without any external damper may have higher vibration level at resonance while crossing critical speed with lower vibration level at operating speed. Additionally, elastomeric mount has inherent hysteresis property due to which it may show entirely different vibration behavior at transient speed or at operating speed.

[005] Harmonic response analysis using Finite Element Analysis (FEA) methods may be employed to simulate the behavior of the machine supported on VIS mounts. During such simulation only stiffness and damping are considered as input parameters as most of the cases other details like internal construction, material property, geometric details of mounts are not taken into account as they are proprietary in nature. Therefore, actual behavior of machine supported on a particular type of VIS mount cannot be simulated using available analysis tools.

[006] Therefore, there is a need for establishing a methodology for performance evaluation of different variety of VIS mounts using a specially designed machine apparatus similar to actual machine in terms of weight, speed and unbalance force.

[007] In the present invention a methodology is disclosed wherein mechanical exciter is used for performance evaluation of different VIS design variants using a single experimental set up. Mechanical exciter is mounted on VIS elements on an elevated platform. Elevated platform and mechanical exciter bottom support base plate are designed in such a manner that all variants of VIS elements can be mounted for testing one after another. In fact, same platform can also be used for measurement of the vibration level of the machine element without VIS for comparison purpose. Mechanical exciter comprises of specially designed gear mesh arrangement; capable of producing desired unidirectional unbalance force at particular operating speed. Weight of the mechanical exciter shall be similar to the actual machine for which VIS performance evaluation is taken up. Speed of the mechanical exciter is controlled using a motor controlled by a variable frequency drive (VFD). Thus operating speed of the mechanical exciter can be matched with target machine speed using VFD and performance of each type of VIS can be measured using vibration sensor for the entire speed range. Vibration sensor can be mounted on mechanical exciter and below VIS to measure reduction of vibration level that can be expected for actual machine at field. In an alternate arrangement the mechanical exciter can be driven using flexible shaft connected to an external motor and speed of the motor is controlled using VFD.

[008] Reference may be made to the below known patents:
[009] In the US patent 3393555 an apparatus for ground testing of aircraft, spacecraft or similar structural components to determine the effects of vibration consists of one or more vibration isolators interposed between the ground and the test specimen and having an anti-resonant frequency a substantially zero vibrating force is transmitted from the specimen to the ground. A sensor detects one characteristics of the vibration of the test specimen such as its frequency and through its associated control panel tunes the anti-resonant frequency of the isolators in accordance with detected characteristics. Therefore, this patent is not related to the testing of different design variants of vibration isolators, rather it is about testing the vibration characteristics of various aerospace components supported using vibration isolation system.

[0010] In the US patent 8561962 a vibration mount operated using valve and pressure arrangement is described. This patent does not disclose method of testing of variant design of VIS mount as such.

[0011] The US patent 2666636 relates to spring suspension for vehicles, particularly, railway car trucks and the principal object of the invention is to provide a spring suspension that is characterized by constant effective static deflection and such suspension shall have a constant frequency regardless of the working load on the suspension. This is a special type of suspension suited for vehicles and methodology of its testing is not disclosed in the patent application.

[0012] The European patent EP0711987B1 relates to exciter apparatus and method for generating vibration or specifically an exciter table using which vibration testing of manufactured components can be performed. However, this patent also does not describe testing of vibration mounts using exciter and is not related to proposed invention.

[0013] In the US patent US2003/0050716A1 a method of recording a vibration isolation system having at least one vibration isolation device that can be assigned at least one of closed loop control device, a computer program for carrying out the method on a computer wherein the computer program comprises a plurality of computing methods. This invention discloses a method of closed loop or open loop control of vibration isolation device and not related to testing of different design variants using mechanical exciter as disclosed in the present invention.

OBJECTS OF THE INVENTION:
[0014] Primary object of the invention is to provide Vibration isolation systems (VIS) Test setup with Mechanical Exciter.
[0015] An object of the invention is to develop a methodology for performance testing of different design variants of vibration isolators for the entire speed range of its application using mechanical exciter of similar weight of the machine for which vibration isolators are to be deployed.

[0016] Another object of the invention is to experimental study of vibration response and damping of the VIS mount before actually being deployed at site.

[0017] Still another object of the invention is to study the vibration response of the VIS mount under various unbalance load.

[0018] Yet another object of the invention is to experimental study of VIS performance under different layout combination. In case weight of the target machine is high compared to mechanical exciter, scaled version of both mechanical exciter and VIS mounts can be chosen such that static deflection of the mount is comparable to original machine and VIS mount combination.

[0019] These and other objects and advantages of the present invention will be apparent to those skilled in the art after a consideration of the following detailed description taken in conjunction with the accompanying drawings in which a preferred form of the present invention is illustrated.

SUMMARY OF INVENTION:
[0020] One or more drawbacks of conventional systems and process are overcome, and additional advantages are provided through the apparatus/composition and a method as claimed in the present disclosure. Additional features and advantages are realized through the technicalities of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered to be part of the claimed disclosure.
[0021] According to the present invention, there is provided Vibration isolation systems (VIS) Test setup with Mechanical Exciter. Here, a methodology is discussed for testing of different design types of vibration isolation systems (VIS) using mechanical exciter (1) mounted on a specially designed test rig.

[0022] The Mechanical exciter (1) is bolted to mechanical exciter bottom base plate (2) using exciter anchoring slotted holes (7). Below mechanical exciter bottom base plate (2) there are provision for mounting of multiple VIS elements (3) in different layout combination using slotted anchoring holes (7). VIS mounted on mechanical exciter is supported using VIS bottom support plate (4). Bottom surface of VIS mount can be bolted to the VIS bottom support plate (4) using the bottom plate holes (40). The VIS bottom support plate (4) is welded to test rig support pedestal (5) and pedestal is anchored to the grouted bolts and test rig anchoring holes (8) on test rig support plate (6).

[0023] Due to slotted hole arrangement (7) in mechanical exciter bottom base plate (2) and VIS bottom support plate (4), same test rig apparatus can be used for testing of different design variants of VIS.

[0024] The mechanical exciter of different design types can be used for testing purpose. However, it should be capable of generating required unbalance force at rated speed similar to target machine for which selected VIS shall finally be deployed. Moreover, mechanical exciter shall have similar weight compared to target machine or static deflection of VIS should be comparable.

[0025] Transient vibration response for the entire speed range with varied unbalance mass (29, 30) can be measured using vibration sensors (38, 39) located above and below VIS.

[0026] From the vibration amplification quality factor (Q) at critical speed derived from the measured transient vibration response plot, damping for a particular type of VIS can be obtained. Similarly, vibration response at the operating speed can be measured for all VIS types using vibration sensors (38, 39).

[0027] Vibration transmitted below VIS can be measured using the vibration sensors (38, 39).
[0028] VIS element with high damping at critical speed, low vibration response at operating speed and low vibration transmissibility to the base is generally selected for the final deployment.

[0029] Finally, using the disclosed methodology and described test rig apparatus, VIS element layout optimization study can be performed for the selected VIS types. VIS layout optimization study is performed iteratively based on the criteria that eccentricity of center of isolator stiffness with center of mass is <±0.5%. There could be multiple layout options that may meet this criterion and most suited layout option with lowest eccentricity can be tested using the described test rig apparatus.

[0030] Various objects, features, aspects and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.

[0031] It is to be understood that the aspects and embodiments of the disclosure described above may be used in any combination with each other. Several of the aspects and embodiments may be combined to form a further embodiment of the disclosure.

[0032] The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS:
[0033] The illustrated embodiments of the subject matter will be best understood by reference to the drawings, wherein like parts are designated by like numerals throughout. The following description is intended only by way of example, and simply illustrates certain selected embodiments of devices, systems, and processes that are consistent with the subject matter as claimed herein, wherein:

Fig.1 shows: VIS Test setup with Mechanical Exciter

Fig.2 shows: VIS Test setup without Mechanical Exciter

Fig.3 shows: Elevation of Mechanical Exciter (typical)

Fig.4 shows: Section A-A of Mechanical exciter (typical)

Fig.5 shows: Section B-B of Mechanical exciter (typical)

Fig.6 shows: Unbalance mass and unbalance force

Fig.7 shows: Free body diagram of mechanical exciter

Fig.8 shows: Transient vibration response plot on mechanical exciter (without VIS)

Fig.9 shows: Transient vibration response plot on mechanical exciter (with VIS Type1)

Fig.10 shows: Transient vibration response plot on mechanical exciter (with VIS Type2)

Fig.11 shows: Transient vibration response plot on mechanical exciter (with VIS Type3)

Fig.12 shows: Transient vibration response plot on mechanical exciter (with VIS Type4)

Fig.13 shows: Transient vibration response plot below VIS (Type1)

Fig.14 shows: Transient vibration response plot below VIS (Type2)

Fig.15 shows: Transient vibration response plot below VIS (Type3)

Fig.16 shows: Transient vibration response plot below VIS (Type4)

[0034] The figures depict embodiments of the disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.

DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION WITH REFERENCE TO THE ACCOMPNAYING DRAWINGS:
[0035] While the embodiments of the disclosure are subject to various modifications and alternative forms, specific embodiment thereof have been shown by way of example in the figures and will be described below. It should be understood, however, that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the scope of the disclosure.

[0036] The present invention makes a disclosure regarding a technology pertaining to invention directing to Vibration isolation systems (VIS) Test setup with Mechanical Exciter.

[0037] Reference may be made to Fig. 1, wherein mechanical exciter (1) is bolted to mechanical exciter bottom base plate (2) using exciter anchoring slotted holes (7). In mechanical exciter bottom base plate (2) there are provisions for mounting of multiple VIS elements (3) in different layout combination using slotted anchoring holes (7). Different design variants of VIS mounts can be mounted using bottom base plate (2) and exciter anchoring bottom holes. VIS mounted on mechanical exciter is supported using VIS bottom support plate (4). Bottom surface of VIS mount (3) is bolted to the VIS bottom support plate (4) using the bottom plate holes (40). VIS bottom support plate (4) is welded to test rig support pedestal (5) and pedestal is anchored to the grouted bolts and test rig anchoring holes (8) on test rig support plate (6).

[0038] Objective of this present invention is to develop a methodology for testing of VIS mounts using a mechanical exciter. There may be different types of mechanical exciter that can be used for this purpose. Detail description of mechanical exciter used for the development of VIS testing methodology is given below. However, VIS mounts can be tested using other design variants of mechanical exciter as well. Hence, disclosed methodology is not limited to mechanical exciter of present design variant only. Exciter components like primary shafts (15, 16) and secondary shafts (17, 18) are arranged inside shaker enclosure (9). Motor (10) is mounted on enclosure (9) through motor base (11) and driving torque is transmitted from motor (10) to the primary shaft1 (15) through belt drive (13) and pulley on primary shaft1 (14). Gear on primary shaft1 (19) drives the gear on secondary shaft1 (20) through gear mesh. Gear on secondary shaft1 (20) connected to gear on secondary shaft2 (21) through gear mesh. Finally gear on secondary shaft2 (21) drives the gear on primary shaft2 (22) through gear mesh. Fig.4 and Fig.5 show primary shafts (15, 16) and secondary shaft (17, 18) and rotating disk (27, 28) along with bearing pairs for primary shafts (23, 24) and bearing pairs for secondary shafts (25, 26). Gears on primary and secondary shafts (19, 20, 21, 22) are of same size and rotation direction of respective gear (34, 35, 36, 37) is shown in Fig 3.

[0039] Unbalance mass (29, 30) mounted on rotating disk (27, 28) creates unidirectional force 31. Quantum of unbalance mass (29, 30) can be varied to generate different levels of unidirectional force using mechanical exciter to study the performance of VIS under varied unbalance force. In the orientation direction as shown in Fig.3, side wall of mechanical exciter (33) and bottom plate of mechanical exciter (32) shall generate unbalance force in vertical direction (31). Mounting side can be interchanged to generate unbalance force of mechanical exciter in other direction as well. Gear (20, 21) are submerged into oil upto certain level such that splash lubrication in all gear mesh surface is achieved.

[0040] Procedure for generation of unbalance force using mechanical exciter is shown in Fig.6 and free body diagram of the exciter is shown in Fig.7, which indicate the following:

(a) Exciter Mass: M
(b) Unbalance mass: m
(c) Stiffness of VIS: k
(d) Damping: C
(e) Eccentricity: e
(f) Rotating speed = ꞷ
(g) X = displacement
(h) Ẍ = acceleration

[0041] Transient vibration response for the entire speed range of mechanical exciter can be captured using vibration sensor at above VIS (38) and below VIS (39). Transient vibration response plot measured for four different design variants of VIS on mechanical exciter using vibration sensor (38) are shown in Fig. 9 to 12 and transient response captured without VIS is shown in Fig.8. Similarly, transmitted transient vibration response plot measured for four different design variants of VIS below mounts using vibration sensor (39) are shown in Fig. 13 to 16. From the transient response plot Fig.9 it can be seen that there is high vibration amplification at system critical speed at about 1250 rpm for VIS type1 due to poor damping. Whereas, from the vibration response transient plot Fig.12 for VIS type4, it can be seen that there is no peak with respect to exciter critical speed at 1250 rpm due to improved damping. Similarly, from Fig.8, vibration response at operating speed is about 40 mm/s without any VIS whereas the vibration response for the VIS mount type4 has the lowest response of 15.3 mm/s at operating speed. Transient response plots of transmitted vibration below VIS for all four variants are shown in Fig. 13 to Fig.16. Vibration transmitted below VIS mount at operating speed for VIS type1 is 8 mm/s whereas for vibration response for VIS type4 is 1.5 mm/s. Thus performance of VIS type4 found to be the best in all aspects among others and can be chosen for deployment at field for target machine with comparable mass of mechanical exciter and operating speed.

[0042] After selection of particular VIS design variant, layout optimization study can be taken up using proposed methodology and described test rig apparatus. VIS mounts can be shifted to other location using slotted holes on mechanical exciter bottom base plate (2) and VIS bottom support plate (4) to study vibration levels for different layout options.

ADVANTAGES ON INVENTION:
- A methodology is described for testing of different design variants of VIS using mechanical exciter.
- Using disclosed methodology performance evaluation of different VIS design variants can be established with a single experimental set up.
- Performance of different design variants of VIS for the entire speed range of operation, damping and vibration response at resonance point and vibration response at operating speed can be obtained.
- Based on the performance, most suitable VIS type can be selected experimentally before final deployment of the selected VIS type at field for the identified machine. This shall help in eliminating uncertainties in VIS performance at field.

WORKING OF INVENTION:
[0043] Present invention shall help in identifying most suitable VIS type to be deployed along with a particular type of machine such that uncertainties related to VIS performance at field is eliminated beforehand using disclosed apparatus. Additionally, as machine foundation design and VIS mounting scheme is worked layout experimentally; keeping no scope for further modification in machine foundation which otherwise could be a costly affair at field.

[0044] Each of the appended claims defines a separate invention, which for infringement purposes is recognized as including equivalents to the various elements or limitations specified in the claims. Depending on the context, all references below to the "invention" may in some cases refer to certain specific embodiments only. In other cases, it will be recognized that references to the "invention" will refer to subject matter recited in one or more, but not necessarily all, of the claims.

[0045] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all groups used in the appended claims.

[0046] It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms (e.g., the term “including” should be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particulars claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or “an” should typically be interpreted to mean “at least one” or “one or more”); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogues to “at least one of A, B and C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances where a convention analogous to “at least one of A, B, or C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase “A or B” will be understood to include the possibilities of “A” or “B” or “A and B”.

[0047] The above description does not provide specific details of manufacture or design of the various components. Those of skill in the art are familiar with such details, and unless departures from those techniques are set out, techniques, known, related art or later developed designs and materials should be employed. Those in the art are capable of choosing suitable manufacturing and design details.

[0048] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. It will be appreciated that several of the above-disclosed and other features and functions, or alternatives thereof, may be combined into other systems or applications. Various presently unforeseen or unanticipated alternatives, modifications, variations, or improvements therein may subsequently be made by those skilled in the art without departing from the scope of the present disclosure as encompassed by the following claims.

[0049] The claims, as originally presented and as they may be amended, encompass variations, alternatives, modifications, improvements, equivalents, and substantial equivalents of the embodiments and teachings disclosed herein, including those that are presently unforeseen or unappreciated, and that, for example, may arise from applicants/patentees and others.

[0050] While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.
, Claims:WE CLAIM:

1. Vibration isolation systems (VIS) Test setup with Mechanical Exciter comprises of mechanical exciter (1) fastened to bottom base plate (2) using exciter anchoring slotted holes (7), wherein the vibration isolation systems (VIS) mounted on the mechanical exciter (1) is supported using VIS bottom support plate (4), in which Bottom surface of VIS mount (3) is fastened to the VIS bottom support plate (4) using multiple bottom plate holes (40), wherein the VIS bottom support plate (4) is fixed to test rig support pedestal (5); and
the Exciter includes primary shafts (15, 16) and secondary shafts (17, 18) arranged inside shaker enclosure (9).

2. The Vibration isolation systems (VIS) Test setup with Mechanical Exciter as claimed in claim 1, wherein the mechanical exciter bottom base plate (2) is having provisions for mounting of multiple VIS elements (3) in different layout combination using the slotted anchoring holes (7).

3. The Vibration isolation systems (VIS) Test setup with Mechanical Exciter as claimed in claim 1 or 2, wherein Different design variants of VIS mounts may be mounted using the bottom base plate (2) and exciter anchoring bottom holes (7).

4. The Vibration isolation systems (VIS) Test setup with Mechanical Exciter as claimed in claims 1-3, wherein the pedestal (5) is anchored to the grouted bolts and test rig anchoring holes (8) on test rig support plate (6).

5. The Vibration isolation systems (VIS) Test setup with Mechanical Exciter as claimed in claims 1-4, wherein a Motor (10) is mounted on the enclosure (9) through motor base (11) and driving torque is transmitted from the motor (10) to the primary shaft1 (15) through belt drive (13) and pulley on primary shaft1 (14), in which Torque transmission is not limited to direct mounting of motor drive alone; there could be flexible shaft as well for transfer of driving torque from motor to primary shaft.

6. The Vibration isolation systems (VIS) Test setup with Mechanical Exciter as claimed in claims 1-5, wherein a Gear on primary shaft1 (19) drives the gear on secondary shaft1 (20) through gear mesh, in which the Gear on secondary shaft1 (20) is connected to gear on secondary shaft2 (21) through gear mesh.

7. The Vibration isolation systems (VIS) Test setup with Mechanical Exciter as claimed in claims 1-6, wherein the gear on secondary shaft2 (21) drives the gear on primary shaft2 (22) through the gear mesh.

8. The Vibration isolation systems (VIS) Test setup with Mechanical Exciter as claimed in claims 1-7, comprising of rotating disk (27, 28) along with bearing pairs for primary shafts (23, 24) and bearing pairs for secondary shafts (25, 26), in which Gears on the primary and secondary shafts (19, 20, 21, 22) are of same size.

9. The Vibration isolation systems (VIS) Test setup with Mechanical Exciter as claimed in claims 1-8, comprising of unbalance mass (29, 30) mounted on rotating disk (27, 28) creates unidirectional force 31, in which the Quantum of unbalance mass (29, 30) may be varied to generate different levels of unidirectional force using the mechanical exciter (1) to study the performance of VIS under varied unbalance force.

10. The Vibration isolation systems (VIS) Test setup with Mechanical Exciter as claimed in claims 1-9, wherein in the orientation direction, side wall of mechanical exciter (33) and bottom plate of mechanical exciter (32) generate unbalance force in vertical direction (31), in which mounting side may be interchanged to generate unbalance force of mechanical exciter in other direction, and the Gears (20, 21) are submerged into oil up to certain level that splash lubrication in all gear mesh surface is achieved.