LDM
This video describes the servo amplifier board which was installed in a missile radar seeker 9E420 (Buk missile system).
On the board there are two indépendant amplifiers. The first one is presumably used for the angular rate gyro DUSV-42-30A (ДУСВ-42-30А) which uses a torque balance system. The second amplifier is used for the control of one DC servo motor which drives one axis of the antenna. One input of this second servo amplifier is the output of an integrator. The input of the integrator is presumably the output of the angular rate gyro, which permits to stabilise the radar antenna during the flight of the missile.
00:00 - Intro
00:41 - Servo amplifiers board
01:22 - Reverse engineering: angular rate gyro servo amplifiers
02:45 - Servo angular rate gyro: how it works
04:32 - Servo motor amplifier
06:31 - Figuring out the rate gyro pinout
Inside the gyro from the YT channel of Sylvain:
• Soviet missile gyro accelerometer platform...
First episode:
• LDM #373: analysis of a 9E420 Radar seeker...