摘要
常规数控系统的伺服控制中，当速度矢量变化较大时会产生大的轨迹跟踪误差．本文应用Ｍ序列信号、最小二乘法和ＡＲＸ模型结构辨识出整个闭环系统的传递函数．在轨迹控制器的前面加上带预见控制的前馈补偿器，以使数控轨迹控制器在不同的频率段具有相同的增益，消除由延迟带来的相位差，从而可减小轨迹跟踪误差，实验表明其性能较为理想．
A great tracking
error will occur when the velocity vectors sharply charged in a general servo system of a NC
machine tool. The transfer function of closed_loop of the NC mill is identified by using the M
serial signal, least square and ARX model. Considering the identification, a feedforward preview
compensator is designed to keep the same magnitude at different frequencies, and to eliminate
the phase delay. The experimental results is show that the tracking performance is improved by
the feedforward preview compensator.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1999年第5期1-7,共7页
Journal of South China University of Technology(Natural Science Edition)
基金
国家自然科学基金
关键词
动态特性
辨识
预见补偿器
铣床
数控铣床
轨迹
dynamics
identification
transfer function
feedforward
preview compensation
