Tracking error and contouring error analysis of coordinated control in biaxial motion of radar servo system

Radar servo tracking system is a position and velocity servo system which implements coordinated control of the position and velocity in biaxial motion (pitching and yawing). The tacking errors on both of the pitching axis and the yawing axis, and the coupling error between the two axes make the coordinated control become more complex. The error analysis of coordinated control in biaxial motion of radar servo system is proposed in this paper. First, the mechanism of biaxial motion radar servo system is analyzed and the corresponding mathematical model is developed. Then the errors in the pitching axis and yawing axis and their decoupling error are analyzed and studied by tracking error and contouring error. Finally, the error analysis of biaxial motion of radar servo system at different motion states is conducted and the effect of the error on the biaxial motion is obtained. The mathematical analysis in this paper provides a cogent mathematical theory and a basis for various coordinated control methods in biaxial motion.