Dissertation > Excellent graduate degree dissertation topics show

Design and Research of Hydraulic Synchronous Control System Based on High Speed on-off Valve

Author: HeQian
Tutor: LiuZhong
School: Hunan Normal University
Course: Circuits and Systems
Keywords: hydraulic synchronous control high speed on-off valve direct control pilot control fuzzy self-adaptive PID
CLC: TP271.31
Type: Master's thesis
Year: 2008
Downloads: 198
Quote: 6
Read: Download Dissertation

Abstract


The traditional hydraulic synchronous system, either the open-loop system or the close-loop system, there are some obvious disadvantages. The cost of the open-loop is low, but its control precision is also not high; the structure of the close-loop is based on servo valve or proportional valve, so not only the cost is high but also the digital control is hard to realize. The digital valve represented by high speed on-off valve, is very significant to the development of the electro-hydraulic control technology, because it possesses lots of prominent advantages such as interacting with computer conveniently and high reliability.Firstly, the thesis analyses the advantages and disadvantage of different types hydraulic synchronous control systems, then discusses the necessity and feasibility of designing the hydraulic synchronous control system based on high speed on-off valve. Secondly, the thesis puts forward five schemes of the synchronous control system, which is based on the characteristics of the high speed on-off valve. The advantages and disadvantages of different schemes are compared and illuminated. The most feasible two schemes are chosen to be studied at last. One of them is the high speed on-off valve works directly, and the other is that the high speed on-off valve works as a pilot valve. The corresponding mathematical models are established after researching on them. And the dynamic simulation of the scheme is chosen to be studied. It can prove the feasibility of this scheme is better. Lastly, in order to overcoming the problems of the system, the compound control strategy based on fuzzy self-adaptive PID is introduced. The synchronous controller is designed. It can improve the controllability of the system and offers the theoretical aegis and technological guarantee to the realization of high precision in the hydraulic synchronous control.

Related Dissertations

  1. The Precision phase of active control technology to,TN248.1
  2. A Study on the Problems of Policy Implement in Country-Level Goverments with a Perspective of Province Directly Governing County System,D630
  3. The Research on User-end Power Quality Compensator Based on DSP,TM761
  4. Research and Experiment on Acceleration Principle of 120-ton Injection Molding Machine Using Accumulator,TQ320.52
  5. Design and Control Strategy of Hydraulic Synchronized System for Engineering Arm,TH137
  6. Research and Implementation on Intelligent Controller of Brushless DC Motor,TM571
  7. Study on the Comparison of the Direct Versus Indirect Control Method for a Two-axis Gimbal System,TP273
  8. Course Keeping Control for Ships Based on Robust Neural Network,U664.82
  9. The idea of the development of China's ecological tax,F812.42
  10. Of the establishment and improvement of China's ecological tax system,F812.42
  11. Study on the Static Var Generator in the Low Voltage Based on DSP,TM762
  12. China's listed companies accounting policy choice administrations Cause Analysis,F275
  13. A Study of the Reform of Distribution Channel for DBTEL Mobile Phone,F426.6
  14. The Analyzing of the Chinese Governmental Financial Role under the Condition of the Market Economy,F832
  15. Design and development of automated coating line plant air conditioning group control,TP273
  16. Unified Power Quality Controller UPQC novel control strategy under the direct control of the method of theoretical and Implementation,TM762
  17. Direct Torque Control of Permanent Magnet Synchronous Machines,TM921.5
  18. Study on Advanced Static Var Generator,TM921.5
  19. High - performance permanent magnet synchronous motor speed control system research,TM351
  20. The Robust Neural Network Control of the Responding Nonlinear Ship Model,U661

CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > General Automation System > Fluid Systems > Hydraulic system
© 2012 www.DissertationTopic.Net  Mobile