摘要
影响控制系统带宽的主要因素有机械结构谐振频率、系统加速能力和系统采样频率。对影响采样控制系统带宽的因素作了详细的分析,给出在低采样频率下扩展系统带宽的两种方法棗虚拟采样法和多频率采样控制法,并对虚拟采样法进行了详细的讨论。实验结果表明,虚拟采样器在插值次数小于等于4时,插值精度可以满足要求,能够将系统带宽扩展3倍左右。
Main factors affecting bandwidth of a control system are resonance frequency of mechanical structure, acceleration capacity and sampling frequency of the system. The analysis of these factors is carried out. Two methodsvirtual sampling method and multi-frequency sampling method, used for expanding system bandwidth, are given. A discussion for virtual sampling method is carried out. The experimental results show that when interpolation number is not bigger than 4 the interpolation accuracy of the virtual sampler can meet with the demand of application and the system bandwidth can be expanded for about 3 times.
出处
《光电工程》
CAS
CSCD
北大核心
2003年第4期20-23,共4页
Opto-Electronic Engineering
关键词
跟踪控制系统
采样频率
系统带宽
Tracking control systems
Sampling frequency
System bandwidth