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The Research of Low Speed Performance of the Hollow-axis High Precision Electro-hydraulic Servo Motor

Author: ChenZhiMing
Tutor: ZhaoKeDing
School: Harbin Institute of Technology
Course: Mechanical and Electronic Engineering
Keywords: Hollow Electrohydraulic Motors Low-speed characteristics Stribeck friction model Plug-in repetitive control
CLC: TH137.51
Type: Master's thesis
Year: 2011
Downloads: 40
Quote: 0
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Abstract


High precision hollow electro-hydraulic servo motor as the drive components of the hydraulic simulator within the frame , its performance will directly affect the performance and accuracy of simulation of the turntable . The low-speed performance is one of the key technical indicators hollow electro-hydraulic servo motor . Good low-speed performance can not only simplify the structure of the entire system , and also to create the conditions to achieve wide speed for the system . Therefore, the low-speed performance of the hollow electro-hydraulic servo motor depth research is of great significance for enhancing the performance of the high-precision simulation turntable . In access to information at home and abroad on the basis of the status quo and development trend of electro-hydraulic servo motor , the hollow , outlined its key technologies and system slow theoretical research progress , and determine the direction of this research . First of all, through the derivation of hollow electro-hydraulic servo motor dynamics equation , established the mathematical model of the motor . Comparative analysis of different friction model , the choice of engineering Stribeck friction model as the basis for analysis and simulation , and analysis of system performance on this basis . Hollow electro-hydraulic servo motor creeping phenomenon , its crawling mechanism are discussed in detail on the basis of in-depth theoretical analysis , discussion of a number of factors that affect the motor crawling . Control strategy for motor crawling problem , using the traditional PID control strategy , due to motor crawling periodic , PID based on the introduction of the plug-in repetitive control method , the simulation results show that this method is able to inhibit motor crawling . Finally , for the theoretical analysis of the results in a hollow motor lab bench motor low speed experiments . The experimental results show that the plug-in repetitive control method can further improve on the basis of the PID motor crawling to improve low-speed performance of the motor .

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CLC: > Industrial Technology > Machinery and Instrument Industry > Mechanical parts and gear > Hydraulic transmission > Hydraulic components > Hydraulic motors,hydraulic cylinders and pumps
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