Proportional integrator (PI) is always adopted in the resonant frequency servo loop in a resonator micro optic gyro (RMOG). The oscillation phenomenon is observed when adjusting the loop gain surpassing a threshold. T...Proportional integrator (PI) is always adopted in the resonant frequency servo loop in a resonator micro optic gyro (RMOG). The oscillation phenomenon is observed when adjusting the loop gain surpassing a threshold. This phenomenon limits system performance on step response speed and residual error. Based on the experiment system, a simulation model was set up. Further analysis shows that the threshold gain is related to the system loop filter setting and the loop delay. The traditional PI frequency servo loop technique in the RMOG system cannot keep up with the environment's disturbance quickly enough, which leads to a large residual error. A compensating method is proposed to optimize the tracking performance, solve the oscillation problem, and speed up the system response. Simulation and experiment results show that the compensated system is superior in performance. It has less residual error in the stable state and is 10 times quicker than the uncompensated system on the step response.展开更多
The servo system actuated by oscillating pneumatic cylinder for X-Y plate is a multi-variable nonlinearcontrol system.Its mathematical model is established,and nonlinear factors are analyzed.Due to the existenceof dea...The servo system actuated by oscillating pneumatic cylinder for X-Y plate is a multi-variable nonlinearcontrol system.Its mathematical model is established,and nonlinear factors are analyzed.Due to the existenceof deadlock zone and the small damp of the pneumatic oscillating cylinder,it is likely to result inovershoot,and there is also certain steady-state error,so online modifying of proportion-integration-differentiation(PID) parameters is needed so as to achieve better control performance.Meanwhile considering thestability demand for long-term run,a fuzzy adaptive PID controller is designed.The result of hardware-inloop(HIL) test and real-time control experiment shows that the adaptive PID controller has desirable selfadaptabilityand robustness to external disturbance and to change of system parameters,and its control performanceis better than that of traditional PID controllers.展开更多
基金supported by the National High-Tech R & D Program (863) of China (No. 2008AA042602)the Fundamental Research Funds for the Central Universities, China (No. KYJD09035)
文摘Proportional integrator (PI) is always adopted in the resonant frequency servo loop in a resonator micro optic gyro (RMOG). The oscillation phenomenon is observed when adjusting the loop gain surpassing a threshold. This phenomenon limits system performance on step response speed and residual error. Based on the experiment system, a simulation model was set up. Further analysis shows that the threshold gain is related to the system loop filter setting and the loop delay. The traditional PI frequency servo loop technique in the RMOG system cannot keep up with the environment's disturbance quickly enough, which leads to a large residual error. A compensating method is proposed to optimize the tracking performance, solve the oscillation problem, and speed up the system response. Simulation and experiment results show that the compensated system is superior in performance. It has less residual error in the stable state and is 10 times quicker than the uncompensated system on the step response.
基金Supported by Japanese SMC Corporation with contract (No. 05-07)
文摘The servo system actuated by oscillating pneumatic cylinder for X-Y plate is a multi-variable nonlinearcontrol system.Its mathematical model is established,and nonlinear factors are analyzed.Due to the existenceof deadlock zone and the small damp of the pneumatic oscillating cylinder,it is likely to result inovershoot,and there is also certain steady-state error,so online modifying of proportion-integration-differentiation(PID) parameters is needed so as to achieve better control performance.Meanwhile considering thestability demand for long-term run,a fuzzy adaptive PID controller is designed.The result of hardware-inloop(HIL) test and real-time control experiment shows that the adaptive PID controller has desirable selfadaptabilityand robustness to external disturbance and to change of system parameters,and its control performanceis better than that of traditional PID controllers.
文摘为了提高光学相位补偿器SBC-IR的控制精度,解决传统PID算法在自动控制过程中响应速度较慢、精度低等问题,更好地实现PID参数的智能整定与位置最优控制,采用粒子群算法(Particle Swarm Optimization,PSO)优化光学相位补偿器电动位移装置的直流伺服位置控制系统,实现对三环比例、积分和微分(Proportional Integral Derivative,PID)位置控制系统参数的自动寻优。首先,搭建电动位移装置的三环直流伺服控制系统模型,包括位置环、速度环和电流环;然后,采用PSO算法对位置环的PID参数进行寻优,得到kp、ki、kd三个参数的最优值,并对PSO算法优化直流伺服位置系统的控制效果与传统PID控制算法的控制效果进行对比。实验结果表明:采用PSO算法优化的电动位移装置三环伺服位置系统具有较好的控制性能,可以实现位置的高性能追踪,响应速度更快,并能在一定程度上提升电动位移装置的位移精度。
