Modeling and simulation for application of electromagnetic linear actuator direct drive electro-hydraulic servo system

2012 ◽  
Author(s):  
Jianhui Zhu ◽  
Siqin Chang
Keyword(s):  
Modeling And Simulation ◽  
Servo System ◽  
Linear Actuator ◽  
Direct Drive ◽  
Hydraulic Servo ◽  
Hydraulic Servo System ◽  
Electromagnetic Linear Actuator

Optimization of the Dynamic Performance of the Direct Drive Volume Control System Based on Orthogonal Experiment

2014 ◽  
Vol 945-949 ◽  
pp. 2680-2684
Author(s):  
Ai Qin Huang ◽  
Yong Wang
Keyword(s):  
Control System ◽  
Dynamic Response ◽  
Orthogonal Experiment ◽  
Dynamic Performance ◽  
Servo System ◽  
Volume Control ◽  
Structure Parameters ◽  
Direct Drive ◽  
Hydraulic Servo ◽  
Hydraulic Servo System

Direct drive volume control (DDVC) electro-hydraulic servo system has many advantages compared to the valve control system. However, its application scopes were restricted by its poor dynamic performance. To study the reason for the low dynamic response, mechanical model of DDVC electro-hydraulic servo system is established. Structure parameters influencing the dynamic performance are analyzed. To optimize the structure parameters, the methodology of orthogonal experiment is presented. The selection of factors and levels of the experiment and the choice of the evaluation index are also revealed. The proposed methodology is carried out by simulation software and an optimal configuration is obtained. The dynamic response of the DDVC system with the optimal parameters is simulated. The results show that the dynamic performances are improved. The cross-over frequencyincreases from 0.0046 rad/s to 0.0442 rad/s, and the rise time Tr decreases from 488.6s to 47.90s.

Research on High Power Direct Drive Differential Volume Control Electro-Hydraulic Servo System

2013 ◽  
Vol 423-426 ◽  
pp. 2865-2868
Author(s):  
Zhu Xin Zhang ◽  
Xin Yun Xu
Keyword(s):  
High Power ◽  
Servo System ◽  
Volume Control ◽  
Direct Drive ◽  
Reciprocating Motion ◽  
Hydraulic Servo ◽  
High Response Frequency ◽  
Hydraulic Servo System ◽  
Motion Characteristics ◽  
High Output

For traditional direct drive volume control electro-hydraulic servo system, the servo motors rotary inertia is limited strictly, the speed of response is slow and the actuators reciprocating motion characteristics are not consistent. In order to solve these problems, this paper designs a kind of high power direct drive differential volume control electro-hydraulic servo system. It is instructive for design of hydraulic system which demands high output power, changes direction of motion frequently, needs high response frequency and requires the speed of reciprocating motion keep consistent.

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