Research on the method of monitoring a servo valve spool position model

In a servo actuation system, the precise control of servo valves in actuators is pretty important. The real-time positions of servo valve spools will affect the actuation of actuating components in the servo actuation system, and thus affect the flight attitude. The anomaly in the servo valve spool positions will cause abnormal responses of control surfaces and, in severe cases, will ead to an immeasurable catastrophe. Therefore, the real-time monitoring of servo valve spool positions will be an important part of fault monitoring of a servo actuation system. In this paper, the Levenberg-Marquardt (L-M) algorithm is introduced for monitoring a servo valve spool position model, and the feasibility of this algorithm is verified via simulation in Matlab/Simulink. The test data are used to obtain more accurate model parameters.