Model Development and Simulation of an Electromechanical Thrust Vector Control Actuator Experiencing Large Magnitude Colinear Transient Forces

Advances in power electronic technology and motor design may allow for the replacement of hydraulic actuators with electromechanical actuators (EMAs). This paper presents the model developed to incorporate force feedback control in an electromechanical actuator experiencing large magnitude transient forces that are colinear with the position command axis. A small signal analysis has been done using the unit step response of either a position command or a disturbance force input. The results of this analysis indicate that a nonlinear system model, including saturation, will be required to adequately simulate the system during a realistic transient load profile. Experimental data has been used to characterize the transient force and validate portions of the system model. The response of a non-linear model to the experimentally determined transient forces are be considered. Plans for future work are also presented.