摘要
针对数控进给伺服系统跟踪轨迹已知的特点,在常规反馈控制结构基础上引入预见前馈补偿控制;通过增设状态变量实现了由IP基本控制回路向预见典型基本回路的转换;并运用偏微分最优化方法求解预见前馈补偿控制系数。应用Simulink仿真工具进行预见控制仿真研究,并利用延迟环节克服了前馈信号难以获得的困难。仿真实例验证了该方法的有效性。
In view of the characteristic of the CNC feeding servo system,the pathway of which is known beforehand,the preview feedback compensation control is adopted based on the feedback control structure.The transformation from the IP basic control loop is realized by adding state variables.The preview feed forward ratio is solved by using the partial differential optimize algorithm.A simulation of preview control has been made with simulink,and overcome the difficulty to get feed forward signal using delay block.The efficiency of this method has proved by simulink test.
出处
《机床与液压》
北大核心
2010年第23期67-69,73,共4页
Machine Tool & Hydraulics
基金
天津市高等学校科技发展基金资助项目(20071107)
关键词
预见控制
伺服控制系统
前馈补偿
Preview control
Servo control system
Feed forward compensation
