Control of a Rigid-Flexible Satellite Solar Panel with Non-collocated Sensor/Actuator

Abstract

This paper presents a model and analysis for a flexible link with non-collocations of sensors and actuators. It shows the changes in the system dynamics and the appearance of zeroes in the right-plan complex, turning the system a non-minimum phase system. The performance of the PID (proportional-integral-derivative) and LQR (linear quadratic regulator) controller are discussed considering the zero dynamics of the system in three points of special interest: (1) the collocated case, when the sensor is in the base of the link; (2) the critical case, where the system starts to present zeroes in the right-plan complex and (3) the limit case, when the sensors are in the end point of the flexible link. Investigation for a simple rigid-flexible model with one mode, in the three cases, the PID and LQR controller performance are damage. To deal with this kind of problem, new control techniques should be developed.