ROBUST CONTROL DESIGN ON THE SERVO SYSTEM OF DIGITAL VERSATILE DISKS
江俊彥、鄭鴻儀
E-mail: [email protected]
ABSTRACT
IN ORDER TO MAKE PICK-UP HEAD CAN READ DATA CORRECTLY, DIGITAL VERSATILE DISK MOTION IS BY WAY OF MECHANICAL AND ELECTRICAL ACTUATOR MOVING OPTICS SYSTEMS,MAKE LASER POINT
CORRE -CTLY FOCUS ON THE DISK.ON THIS PAPER CONSIDER PLANT PARAMETER PERTURBATION AND DISTURBAN -CE,DESIGN CONTROLLER,MAKING SYSTEM TO ACHIEVE AN OBJECTIVE FOR PERFORMANCE REQUEST.EXPLO -ITATION MANY TIMES IDENTIFICATION GET PARAMETER,SELECT AVERAGE OF
PARAMETER AS PLANT,WHEN SYSTEM ON VARIATION INTERVAL CAN STABLE,OVERCOME DISTURBANCE,AND ERROR REACH PERFORMANCE SPECIFICATION. FINALLY USE MATLAB
SIMULATION,CHECK CONTROLLER ACCURACY.THUS,USE TOPICAL CO -NTROL PID AND MODERN CONTROL ROBUST CONTROL DESIGN CONTROLLER. THE RESULTS OF PID DESIGN, CAN ACHIEVE AN OBJECTIVE FOR PERFORMANCE REQUEST WHEN PLANT ON PARAMETER PERTURBATION,TIME DOMAIN PERFORMANCE,SETTLING TIME IS 3*10-5 SEC,OVERSHOOT IS 1%,BANDWIDTH 50KHZ, THE ERROR VALUE OF DISCRETE DOMAIN LESS THAN 0.0122, ALL SATISFIED BANDWIDTH MORE THAN 2.4 KHZ AND ERROR LESS THAN 0.069 VOLTAGE, PROOF PID CONTROLLER CAN OVERCOME THE EFFECT OF PARAMETER PERTURBATION. WHEN CONSIDER DISTURBANCE D=500 SIN(1500T) ΜM, ERROR VALUE REACH 0.0745, CAN'T ACHIEVE AN OBJECTIVE FOR PERFORMANCE REQUEST, BECAUSE USE ROBUST CONTROL DESIGN CON -TROLLER. CONSIDER PARAMETER PERTURBATION AND DISTURBANCE, THE CONTROLLER MUST BE FULL INF -ORMATION CONTROLLER. THE RESULTS OF DESIGN, WHEN AT THE SAME TIME EXIST
PARAMETER PERTURB -ATION AND DISTURBANCE, SETTLING IS 3*10-5 SEC, BANDWIDTH 30 KHZ, AND CAN STAND ON DESIGN CONDITION (EXAMPLE: OVERSHOOT, SETTLING TIME) GET CONTROLLER AND
OBSERVER GAIN, THE ERROR VALUE OF DISCRETE DOMAIN: FOCUS IS 0.0318 LESS THAN 0.069,TRACK IS 0.0062 LESS THAN 0.0495 VOLTAGE. WE HOPE THE RESULTS OF THIS RESEARCH WILL BE REFERRED IN INDUSTRY IN THE FUTURE.
Keywords : MECHANICAL AND ELECTRICAL ACTUATOR SERVO SYSTEM , PARAMETER PERTURBATION , DISTURBANCE , ROBUST CONTROL , FULL INFORMATION CONTROLLER.
Table of Contents
第一章 緒論--P1 1.1 前言--P1 1.2 研究動機與目的--P3 1.3 文獻回顧--P4 1.4 論文大綱--P6 第二章 光碟機讀取頭伺服系統及參 數鑑別--P8 2.1 光學讀取頭--P8 2.1.1 聚伺服系統--P10 2.1.2 循軌伺服系統--P12 2.2 系統鑑別--P15 2.2.1 系統波德圖之量 測--P15 2.2.2 曲線擬合及參數分析--P17 第三章 PID控制器設計--P20 3.1 設計比例放大器--P20 3.2 比例、徵分器之設計結 果--P22 3.3 控制器設計結果討論--P36 第四章 強健控制應用於光碟機伺服系統--P37 4.1 強健控制介紹--P37 4.2 以強健控制 設計控制器--P43 4.3 討論伺服系統性能--P51 第五章 控制系統誤差分析--P59 5.1 控制器數位化--P59 5.2 誤差討論--P67 第六 章 結果建議--P70 6.1 結論與討論--P70 6.2 建議--P71
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