A novel control algorithm for two-axis motion in 3-DOF TVC nozzle

To control pitch and yaw motion of a TVC(Thrust Vector Control) nozzle with 3-DOF(Degree Of Freedom), additional apparatuses are usually required to prevent induced rolling motion. However, the supplemental devices bring hardware designers many difficulties related to the spatial arrangement of TVC nozzle and actuators. In this paper, in order to solve the problem, the type of two joints linked between the nozzle and two actuators are proposed. And, by using the proposed type of two joints, new kinematic model to restrict the rolling motion is established. Moreover, a novel control algorithm based on the analytic solution for the kinematic model is suggested. The usefulness of this algorithm is verified through simulation study.