Simultaneous Optimization of Low-pass Filter and Controller in Robust Repetitive Control Systems

2007 ◽  
Author(s):  
Jin-Hua She ◽  
Min Wu ◽  
Yong-Hong Lan ◽  
Yong He
Keyword(s):  
Control Systems ◽  
Repetitive Control ◽  
Simultaneous Optimization ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass

A Performance Enhancement Scheme for Robust Repetitive Control System

2004 ◽  
Vol 126 (1) ◽  
pp. 224-229 ◽  
Author(s):  
Byung-Sub Kim ◽  
Tsu-Chin Tsao
Keyword(s):  
Control System ◽  
Performance Enhancement ◽  
Repetitive Control ◽  
Sensitivity Function ◽  
Robust Performance ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Model Stability ◽  
Filter Structure ◽  
Low Pass

This paper presents a method for enhancing the performance of a digital repetitive control system. The performance at the fundamental frequency and its harmonics of repetitive exogenous signals is improved by applying a modified low-pass qz,z−1 filter structure in the repetitive signal generator of the internal model. Stability and robust performance is achieved through μ-synthesis. The modified low-pass filter is motivated by the attempt to reduce the sensitivity function by squaring it. The magnitude of the sensitivity function is substantially reduced at the periodic reference frequencies since the value is already much less than unity. The proposed approach is demonstrated by its implementation on an electrohydraulic actuator for tracking periodic cam-like profiles.

Tracking Performance Improvement of Repetitive Controller for Nano-Manipulating Systems With Time Delays

2019 ◽  
Author(s):  
Pengbo Liu ◽  
Peng Yan
Keyword(s):  
Time Delay ◽  
Performance Improvement ◽  
Controller Design ◽  
Repetitive Control ◽  
Tracking Performance ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Performance Improvements ◽  
Low Pass ◽  
Repetitive Controller

Abstract This paper investigates the robust repetitive controller design with improved tracking performance for nano-manipulating systems with time delay. In order to handle the time delay caused by the analog-to-digital (A/D) conversion of the capacitive sensors with ultra high precision, we modify the conventional repetitive control structure where the design of low pass filter is formulated as an H∞ optimization problem. For the purpose of tracking performance improvement, we further modify the structure of the low pass filter by shaping the sensitivity functions of the closed-loop system. With consideration of the existing of model uncertainties, the design of the modified low pass filter is also formulated as an H∞ optimization of infinite dimensional systems. The effectiveness of the proposed repetitive control architecture is further verified by real time experiments on a piezo driven nano-stage, where significant tracking performance improvements are demonstrated comparing with the traditional repetitive controller.

Design of Programmable Wideband Low Pass Filter with Continuous-Time/Discrete-Time Hybrid Architecture

2017 ◽  
Vol E100.C (10) ◽  
pp. 858-865 ◽  
Author(s):  
Yohei MORISHITA ◽  
Koichi MIZUNO ◽  
Junji SATO ◽  
Koji TAKINAMI ◽  
Kazuaki TAKAHASHI
Keyword(s):  
Discrete Time ◽  
Continuous Time ◽  
Hybrid Architecture ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass

ANALYSIS AND IMPROVEMENT TECHNIQUES FOR THE TRANSFER FUNCTION OF A PLANAR LOW - PASS FILTER

2016 ◽  
Vol 15 (12) ◽  
pp. 2579-2586
Author(s):  
Adina Racasan ◽  
Calin Munteanu ◽  
Vasile Topa ◽  
Claudia Pacurar ◽  
Claudia Hebedean
Keyword(s):  
Transfer Function ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass
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