High-precision Attitude Control and Active Vibration Suppression of Flexible Satellite
A hybrid control scheme is proposed which combines the intelligent sliding mode control and vibration control. Considering the movement of flexible and rotating parts imposes large disturbances on the satellite, and affects the pointing accuracy and stability of attitude, a sliding mode controller is used to eliminate attitude error and ensure system stability. Self-recurrent wavelet neural network (SRWNN) is used to estimate sliding mode switching gain on-line, which can effectively weaken chattering caused by discontinuous sliding mode control. For actively damping the excited elastic vibrations, the strain-rate feedback control is also employed by using piezoelectric materials as additional sensors and actuators. Finally, simulation results indicate that the proposed hybrid controller provide a small steady error, a fast dynamic response, and an obvious rejection of flexible vibrations.
flexible satellitesliding mode control SRWNN active vibration suppression
Wang Zhi Zhang Ru-fei
Computer Science and Engineering College Xian Technological University Xian 710032, China College of Astronautics Northwestern Polytechnical University Xian 710072, China
国际会议
厦门
英文
756-761
2010-10-29（万方平台首次上网日期，不代表论文的发表时间）