Le labo de Michel | LDM #185: Aircraft Air Data Unit D11731TH - Part 2: Reverse Engineering and tests @lelabodemichel5162 | Uploaded 3 years ago | Updated 1 hour ago
On this second episode we will see the schematic diagram of the altitude board which permits to give a measurement of a variation of altitude around a hold altitude. A servo control is used to track the altitude. A relay permits to open the servo control loop, therefore the feedback value from the servo control remains constant. The output of the first error amplifier gives a measurement of the altitude variation. Measurements shows a variation of +/- 10V for a static pressure variation of +/- 4 mbars for an absolute static pressure of 850 mbars.
00:00 - Intro
01:41 - Reverse Engineering - Altitude Board connector pinout
02:36 - Reverse Engineering - Complete altitude board
03:00 - Voltage Reference
04:32 - Servo Control Loop
06:29 - Tests
10:22 - Conclusion
On this second episode we will see the schematic diagram of the altitude board which permits to give a measurement of a variation of altitude around a hold altitude. A servo control is used to track the altitude. A relay permits to open the servo control loop, therefore the feedback value from the servo control remains constant. The output of the first error amplifier gives a measurement of the altitude variation. Measurements shows a variation of +/- 10V for a static pressure variation of +/- 4 mbars for an absolute static pressure of 850 mbars.
00:00 - Intro
01:41 - Reverse Engineering - Altitude Board connector pinout
02:36 - Reverse Engineering - Complete altitude board
03:00 - Voltage Reference
04:32 - Servo Control Loop
06:29 - Tests
10:22 - Conclusion
