摘要
针对光学成像卫星姿态大角度机动控制要求,在力矩受限的情况下,设计了一种模糊参数整定PID算法,通过模糊智能控制器的输出来对经典PID控制器的参数进行整定,并设计了适合的隶属度函数及论域,使模糊控制器的整定参数更趋近于适应控制情况要求。同时,结合验证非线性控制的幅-相曲线稳定性判定定理,用多级继电函数来描述模糊控制器数学模型,证明文中的卫星姿态大角度机动模糊参数整定PID控制系统的稳定性。仿真结果表明,该智能控制算法有较好的控制性能和鲁棒性,其超调量为0.2%,控制指向精度为0.05°,稳定度为0.005°/s。在系统参数改变±50%时仍能渐进稳定。
A PID algorithm with fuzzy parameters adjusting for large angle maneuver control of satellite attitude in the case of limited torque is designed.In this algorithm,the classic PID parameters are adjusted according to the output of fuzzy intelligent controller,a suitable membership function and the universe are designed,so the fuzzy adjusting parameters can meet the requirements more precisely.Combined with amplitude-phase curve stability decision theorem,the mathematical model of the fuzzy controller is described by multi-level relay function which proves the stability of the PID control system.Simulation results show that this intelligent control algorithm has better control performance and robustness,and it obtains an overshoot of 0.2%,control point accuracy of 0.05°,and stability of 0.005°/s.The system is still asymptotically stable when the control parameters change by ±50%.
出处
《半导体光电》
CAS
CSCD
北大核心
2011年第3期424-428,共5页
Semiconductor Optoelectronics
关键词
大角度机动
模糊控制
幅相曲线
large angel maneuver
fuzzy control
amplitude-phase curve
