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Simulation and Realization for Synchronization Control of Electro-hydraulic Servo System

Author: SunMeng
Tutor: LiChangChun
School: Beijing Jiaotong University
Course: Mechanical and Electronic Engineering
Keywords: Electro-hydraulic servo synchronization control system Power Bond Graph Extraneous force compensation Structure invariance principle Flow compensation
CLC: TP271.31
Type: Master's thesis
Year: 2008
Downloads: 313
Quote: 9
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Abstract


The mathematical model of electro-hydraulic servo system is the most important issue of the control system analysis and design , control strategies on the basis of effective research . Currently , the most commonly used modeling method based on the block diagram of the linear system , we can not accurately describe the inherent non-linearity of the electro-hydraulic servo system , can not describe the power flow in the system . Power Bond Graph emergence of electro-hydraulic servo system model accurately establish strong technical means , which may provide an accurate analysis of the dynamic characteristics of the electro-hydraulic servo system . On the basis of the widely read literature , synchronized to electro-hydraulic servo control system as the research object , use the power bond graph Law on the system modeling and simulation , and synchronization control the system excess force to carry out research , in accordance with the principle of invariance of the structure studied synchronization control strategy. The simulation and experimental results show that the control strategy to compensate for the excess force due to the synchronized movement . Papers synchronization as electro-hydraulic servo control system works and take full account of the servo valve port nonlinear hydraulic cylinder leakage and friction nonlinear factors based on the establishment of the electro-hydraulic servo synchronous control system power bond graph time domain and frequency domain analysis of the model , and simultaneous position and force loading system . In-depth analysis of the generation mechanism of excess force , its work characteristics , and the bond graph simulation . The proposed flow compensation design ideas on the basis of theoretical analysis and simulation , in accordance with the principle of invariance of the structure , estimated speed , flow compensation controller is constructed at the same time to establish a power bond graph model control system based on the synchronous flow compensation and model simulation , simulation results prove that the the flow compensation can eliminate synchronization control caused by excess force . Then by contrast experimental results verify the effectiveness of the flow compensation controller in eliminating extraneous force .

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > General Automation System > Fluid Systems > Hydraulic system
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