Dissertation > Excellent graduate degree dissertation topics show
Research on Nonlinear Control Method of Hydraulic System
Author: ChangYuan
Tutor: WuAiGuo
School: Tianjin University
Course: Control Theory and Control Engineering
Keywords: Forging Hydraulic Press Affine Nonlinear Differential Geometric Feedback Linearization H_∞Robust Control
CLC: TP271.31
Type: Master's thesis
Year: 2008
Downloads: 96
Quote: 2
Read: Download Dissertation
Abstract
|
Forging hydraulic press is considered as one of the developing directions offorging press because of its fast forging speed，high control accuracy，highautomation，wide technology range，saving energy and material. It is a product toreplace large type of forging hammer and mesotype and minitype common forgingwater press.In the thesis，the current status and development tendency of hydraulic forgingpress domestic and abroad are investigated. The work principle of hydraulic press andits control system are studied. Based on the analysis of isothermal hydraulic forgingpress, the mathematical model of the hydraulic system is established.Through differential geometric feedback linearization, the affine non-linear modelof the hydraulic system is equivalent to a linear model. As a result, the system can beanalyzed and designed with linear system theory. The relation of uncertaintycomponent of the system model before and after the exact feedback linearizationmapping is discussed.The principle and method of robust controller design based on LMI method isintroduced. Considering the the impact of the external disturbance, according to therequirements of the simultaneous performance of the hydraulic system, the controllerbased on H∞robust control method is designed. The simulation results show a gooddynamic performance. And the results are compared with the PID control algorithm,and it is showed that the system has a pretty good anti-jamming performance.Considering the uncertainty of the model, the controller which can resist both theuncertainty of the model and the external disturbance is designed based on H∞robustcontrol method.
|
Related Dissertations
- Modeling and Control of AirBall System,TP391.9
- Optimal Control of linear flexible two inverted pendulum,TP13
- Research on Three-stage Brushless Synchronous Generator Excitation Control,TM31
- Research on Fuzzy Adaptive Control Approach,TP13
- Chaos Oscillation Control of Parallel Diesel Generators,TM314
- Controller Design and Study of Electrical Power Aided Steering System Based on H_∞,U463.4
- Research on Adaptive Fuzzy Control of Nonaffine Nonlinear Systems,TP13
- Research on Backstepping Method for Nonlinear Model of Hydraulic System,TP271.31
- Beam horizontally offset line detection system research and development of activities of the hydraulic press,TP274
- Drive position control system of large forging hydraulic motor beam,TP273
- The Study and Implement of Control System of Large Hydraulic Press,TP273
- Optimal Sliding Mode Control for A Class of Affine Nonlinear Systems with Uncertainties,TP13
- Adaptive Output Feedback Control for A Class of Non-affine Nonlinear Systems,O231.2
- Research on Robust Control with Region Pole Based on Uncertain Sampled-data Systems,TP13
- Rotational Speed Control Researching for PMSG-based Wind Energy Conversion System,TM614
- Study of Ring Torque Motor Dynamic Sliding Mode Control,TM359.6
- Study on the United Simulation and Experimental of the Machine and Hydraulic System for 22MN Fast Forging Press,TG315.41
- Hydraulic System Design and Simulation of the 65MN Free Forging Press,TG315.46
- 300MN forging hydraulic machine hydraulic transformer fault simulation and reliability analysis system,TG315
- Independent Variable-Pitch Control Strategy on Optimizing the Distribution of MW Level Wind Turbines’ Load,TM315
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
|