Design and Implementation of a Novel Flow Control Valve and Position Control Systems for Pneumatic Actuator
許東成、蔡耀文
E-mail: [email protected]
ABSTRACT
Operating automatic machine, precise flow control valve or other components are called for to operate with positioning controller while pneumatic system controls position. For practical purposes, however, uses of pneumatic system are limited because of expensive imported positioning controller, such as German FESTO flow control valve. Therefore, this research aims at design and development of new flow control valve and its positioning control system. Through experiment, a less expensive and accessible practice of precise pneumatic positioning control has succeeded in controlling position by precision of 0.2 mm, which makes the research valuable in practical propose. First of all, the research designs a new, adjustable flow control valve, which has patented in Taiwan and China. (Taiwan patent NO. M280442. China patent is approved and issuing certification). Also, another design for hydraulic & pneumatic positioning control structure has been done and gotten Taiwan patent of new positioning control instruction (positioning control structure, patent NO. M281096). By complex electrification control, machine manufacturing can be more precise; hydraulic & pneumatic control technology can be more complicated. To practice precise pneumatic actuator and positioning controller, the research takes proportional integral controller and variable structure controller with DSP control units system; it can precisely control position. Moreover, the easy-to-get, low-priced units could make enterprise more competitive by reducing manufacturing cost, which is one of the main ideas of this research.
Keywords : Pneumatic actuator,Flow control valve,Proportional integral controller,Variable structure controller Table of Contents
COVER AUTHORIZATION LETTERS……….………iii ABSTRACT (CHINESE)………
……….…….iv ABSTRACT (ENGLISH)……….………
….….v ACKNOWLEDGMENT……….………..vi TABLE OF CONTENTS.………
……….………...……...…...……….viii LIST OF FIGURES……….………….……
……. x ABBREVIATIONS AND SYMBOLS………...….……..xi CHAPTER 1 INTRODUTION 1.1 Motivation……….………1 1.2 Previous Researches………
……….………3 1.3 Organization of this Thesis………...4 CHAPTER 2 DESIGN OFA NOVEL FLOW CONTROL VALVE AND THE MOTION LOCALIZATION STRUCTURE FOR
HYDRAULIC AND PNEUMATIC 2.1 Improving Type Flow Control Valve………...….7 2.2 The Motion Localization Structure………...8 2.3 Importance To Use On Industry.………
………...9 CHAPTER 3 THE SYSTEMATIC STRUCTURE OF PNEUMATIC 3.1 Research Approach and Experimental Setup………..11 3.2 The Experimental Equipment………
……….15 3.3 Mathematics Mode of The Pneumatic System………...20 3.4 The Air Pressure Position Control Research Way………..28 CHAPTER 4 USING PI CONTROL THEORY AND THE SLIDING MODE CONTROL THEORY TO DESIGN A POSITION CONTROLLER FOR PNEUMATIC ACTUATOR 4.1 PI Controller………...………..………..…30 4.2 Siding Mode Control System Theory...…………
………...………...31 4.3 Sliding Mode System……….……….39 4.4 The sliding mode controller of pneumatic……….………...….……….41 CHAPTER 5 THE COMPUTER SIMULATION
EXPERIMENTAL AND RESULT 5.1 The experimental system description………...…..………44 5.2 The experiment of the A/D circuit………...…...45 5.3 The position control of the PI control system………
………..…….…..49 5.4 The position control of sliding mode control system……….56 CHAPTER 6 CONCLUSION………...…..57 APPENDIXES………
………...….…..63 REFERENCE………...…...….……66 AUTHOR INFORMATION……….…67 PATENT LIST...……..………
………..70
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