A Novel Control Approach for a Thrust Vector System With an Electromechanical Actuator

A novel control scheme for a thrust vector system with an electromechanical actuator is proposed. The proposed method merges the idea exploited in sliding mode control (SMC) with proportion- integration-differentiation (PID) control, which brings advantages in terms of strong robustness and good position tracking performance, while the chattering of the control signal produced by the SMC is small. A model for a typical thrust vector system with an electromechanical actuator is established and analyzed. To evaluate the performance of the proposed approach, the traditional PID controller mixed with bangbang control and the proposed compound control law is applied to the two-channel model of the thrust vector system with an electromechanical actuator. Various simulation examples are provided to show that this compound control law has stronger robustness to the model parameter uncertainty and better position tracking performance. In addition, the chattering is slight.