【摘要】 为克服大型光电跟踪平台直流调速系统的非线性因素影响,利用变结构控制响应速度快,针对系统的参数变化和外部扰动不灵敏的特点,设计了滑模变结构控制器。通过Simulink仿真并与PID(Proportional-In-tegral-Differential)控制方法相比较得出,采用SMC(Sliding Mode Control)设计系统稳态跟踪的误差减小到PID控制系统的1/3,调节时间缩短为原来的1/7,由超调3%变为无超调,由对参数摄动和外部扰动敏感变为不敏感。从而证明了在大型光电跟踪平台直流调速系统中,滑模变结构控制能显著减小系统反应时间和稳态跟踪误差,对参数摄动和外部扰动具有良好的鲁棒性。更多还原

【Abstract】 In order to remove the nonlinear factor of the DC(Direct Current) rotor speed regulation system in large photoelectric tracking table,a servo system with sliding mode variable structure control was designed.It achieves quick response performance and insensitivity to variation of plant parameters and external disturbance of the variable structure control.According to the simulation and relative to the PID(Proportional-Integral-Differential) controller,results show that sliding mode control can reduce adjust time and tracking error,also has a strong robustness for external disturbance and parameter change.更多还原