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哈尔滨工业大学学报（英文版）2008，Vol.15Issue(5)：705-710,6.
Variable structure attitude maneuver and vibration control of flexible spacecraft
Variable structure attitude maneuver and vibration control of flexible spacecraft
摘要
Abstract
A dual-stage control system design method is presented for the three-axis-rotational maneuver and vibration stabilization of a spacecraft with flexible appendages embedded with piezoceramics as sensor and actuator.In this design approach,the attitude control and the vibration suppression sub-systems ale designed separately using the lower order model.The design of attitude controller is based on the variable structure control (VSC)theory leading to a discontinuous control law.This controller accomplishes asymptotic attitude maneuvering in the closed-loop system and is insensitive to the interaction of elastic modes and uncertainty in the system.To actively suppress the flexible vibrations,the modal velocity feedback control method is presented by using piezoelectric materials as additional sensor and actuator bonded on the surface of the flexible appendages.In addition,a special configuration of actuators for three-axis attitude control is also investigated:the pitch attitude controlled by a momentum wheel,and the roll/yaw control achieved by on-off thrustem.which is modulated by pulse width pulse frequency modulation technique to construct the proper control torque history.Numerical simulations performed show that the rotational maneuver and vibration suppression ale accomplished in spite of the presence of disturbance torque and parameter uncertainty.关键词
variable structure control/flexible spacecraft/vibration control/attitude maneuverKey words
variable structure control/flexible spacecraft/vibration control/attitude maneuver分类
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HU Qing-lei,MA Cuang-fu..Variable structure attitude maneuver and vibration control of flexible spacecraft[J].哈尔滨工业大学学报（英文版）,2008,15(5):705-710,6.基金项目
Sponsored by the National Natural Science Foundation of China(Grant No.60774062),Research Fund for the Doctoral Program of Higher Education of China(Grant No.20070213061)and Young Excellent Talents in Harbin Institute of Technology(Grant No.HITQNJS.2007.001). （Grant No.60774062）
