FIELD OF THE INVENTION
This development, in Aerospace domain, facilitates assembler to calibrate the
various critical parameters in real time. The real time calibration interface system
reads the real time data from serial port and sends it into database of non
editable format being used for calibration. Using this database of various
parameters, sensors installed in the aircraft can be calibrated in feedback
system.
BACKGROUND OF THE INVENTION
There was no system which can provide the degree of freedom to calibrate the
system as many degree of polynomial as one required for the purpose of
precision for aircraft sensor related parameters mainly Analog, ARINC-429,
Discrete &Engine RPM.Hence, this dynamic calibration of flight parameters in
real time has been developed.
SUMMARY OF PRESENT INVENTION
System for dynamic calibration of flight parameters in real time is developed in
LabView Environment and comprises of followings:
1. Dynamic calibration of flight parameters in real time executable developed in
LabView Environment
2. Rugged / Non Rugged Laptop/computer
3. RS 422/RS 485 to USB 2.0 Converter hardware.
4. Shielded Loom assembly
5.RS 232 to USB 2.0 Converter hardware
The System for dynamic calibration is developed in such a fashion that it can
calibrate the parameters as per criticality of the parameter means the digit of
precision for some critical parameters may be required more, further more if the
parameter is non linear so the user can choose the degree of fitness for getting
the more preciseness of the parameters in the defined possible
Engineeringrange of the parameters.
Software functionality is broadly divided into following parts i.e
1. Data collection from various standard equipments for various parameters
2. Converting the raw data in engineering values
3. Curve fitting as per the converted engineering values versus standard
equipment input data.
4. Again Capturing of calibrated data on RS 422 data
5. Programming the Avionics system for the calibrated data
6. Comparing the input & calibrated data
7. Result Display for successful calibration
BRIEF DESCRIPTION OF THE DRAWINGS
There are threefigures fordynamic calibration of flight parameters in real time
developed in LabView platform.The Fig 1 shows Setup for Dynamic Calibration of
Flight Parameter in Real Time.The Fig 2shows the flow chart& Fig 3 shows the
external interface requirements.
DETAILED DESCRIPTION
In accordance with one aspect of present invention,the system for dynamic
calibration of flight parameters in real time is developed as per the hardware&
software defined above. First of all one has toselect parameter for calibration
then that parameter is measured with various inputs & outputs taken on dynamic
calibration software system, Need of the calibration could beunderstoodby the
results, The type of calibration will depend upon the results taken for that
parameter
In accordance with second aspect of invention,the data collection for that
parameter would be according the criticality of parameter if the parameter is very
critical then the sample for input and output should be as much as possible to
take.
The data collected will be the input for deciding the type of curve fitting to be
applied, if the samples taken are more in linear form then linear curve fitting will
be applied, if the data collected is in non linear form then polynomial degree of
curve fitting will be applied. It is not necessary that more degree of curve fitting
will provide better results, sometime less degree of curve fitting provides better
results so it has be verified on entire range of the parameter which degree of
curve fitting will cover the entire range of the parameter. In most of the case two
or three of curve fitting is applied.
In accordance with another aspect of present invention, Once the curve fitting is
applied, the calibration file is loaded through RS 232 to USB 2.0 converter in
Avionics System or health monitoring system. Then again sample for inputs &
outputs are again taken & behaviors of the output is compared with the inputs.
On behalf of comparison the results are declared whether further calibration is
required to be applied or calibration is successful. The results for calibration can
be saved in hard as well as in soft form for future reference.
In accordance with yet another aspect of present invention, System for dynamic
calibration of flight parameters in real time is developed in LabView Environment
andcomprises of followings:
1. Dynamic calibration of flight parameters in real time executable developed in
LabView Environment
2. Rugged / Non Rugged Laptop/computer
3. RS 422/RS 485 to USB 2.0 Converter hardware.
4. Shielded Loom assembly
5.RS 232 to USB 2.0 Converter hardware
The System for dynamic calibration is developed in such a fashion that it can
calibrate the parameters as per criticality of the parameter means the digit of
precision for some critical parameters may be required more, further more if the
parameter is non linear so the user can choose the degree of fitness for getting
the more preciseness of the parameters in the defined possible Engineering
range of the parameters.
Functional methodology is broadly divided into following parts i.e
8. Data collection from various standard equipments for various parameters
9. Converting the raw data in engineering values
Annexure-II
10. Curve fitting as per the converted engineering values versus standard
equipment input data.
11. Again Capturing of calibrated data on RS 422 data
12. Programming the Avionics system for the calibrated data
13. Comparing the input & calibrated data
14. Result Display for successful calibration

WE CLAIMS:-
Accordingly, the description of the present invention is to be considered as illustrative only and is for the purpose of teaching those skilled in the art of the best mode of carrying out the invention. The details may be varied substantially without departing from the spirit of the invention, and exclusive use of all modifications which are within the scope of the appended claims is reserved. We Claim

1. The System for dynamic calibration comprising:

- Dynamic calibration of flight parameters in real time executable developed in LabView Environment
- Rugged / Non Rugged Laptop/computer
- RS 422/RS 485 to USB 2.0 Converter hardware.
- Shielded Loom assembly
- RS 232 to USB 2.0 Converter hardware

2. The system according to claim 1, capable of capable of curve fitting in polynomial degree foratleast one sensor data available on aircraft like temperature, pressure using atleast one dedicated interface and/or atleast one standard interface.

3. The system according to claim 1, further capable ofcalibration for atleastone sensor data available on aircraft.

4. The system according to claim 1, capable of calibration for Analog, Engine RPM & Avionics Bus protocol parameters.

5. The system according to claim 1, used to compare & deceleration of result before calibration & after calibrationfor parameters in a frame format consisting of atleast 64words/sec.

6. The system according to claim 1& 3, used to improve the precision of measurement for various parameters of aircraft. ,TagSPECI:As per Annexure-II