For the tumbling loop the servo actuator adopts three-position relay control fashion to make the loop be stable by using the relay control circuit the three-position and five-passage valve and the gas amplification device .

对于滚转稳定回路，采用 三 位置 继电控制舵，通过继电放大器、三位五通阀和气动放大器来控制舵面的偏转，以此来实现滚转稳定。