| 摘要 |
<p>Generic portable Test Equipment for SSFDR design is based on C series I modules of National Instruments along with USB based cDAQ chassis for generating/simulating the aircraft sensor data like analog input/output, discrete input/output and Frequency input/output. All the standard signals generated by NI cards are routed through indigenous interfaces cards for amplification and processing of the signals. All simulated sensor data shall be fed to the FDR for processing and processed data should be stored in the Protected Memory Modules. Same processed data is being captured by test Equipment on RS 422 port. The data received on RS 422 is analyzed by the test rig and Pass/Fail result shall be displayed on the screen. Test rig also simulate the ARNIC 717/429 and MIL 1553B avionics digital buses. ARINC 717 Transmitters and Receivers can be configured to various data frame rates. Same way ARINC 429 can also be configured to HIGH and LOW speed. USB to RS 422 converter is used as the telemetry interface for data analysis and USB to RS 232 is used for fusing the code in flash memory of SSFDR. These compact modules can be easily programmed in LABVIEW with user friendly GUI, which helped us to make common software to test different type of platform of Flight Data Recorders. Test Equipment requires l/10th tolerance of the Flight Data Recorder tolerance which is easily provided by Analog & Frequency module. Non-editable file like in .pdf format of test results can be generated. Test Equipment is portable and rugged for easy movement and transportation to different locations easily. Components/modules used in the Test Equipment have been certified for the storage temperature from -40° to 85°. Qualification of test equipment is carried out as per JS 5555, which include thermal shock, humidity, toppling and roadibilty tests.</p> |
