scholarly journals A Nonlinear Model-Based Variable Input Control for the Position Control System of HDU

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 67742-67751
Author(s):  
Bin Yu ◽  
Qi-Xin Zhu ◽  
Kai-Xian Ba ◽  
Zheng-Guo Jin ◽  
Zheng-Jie Gao ◽  
...  
Keyword(s):  
Control System ◽  
Nonlinear Model ◽  
Position Control ◽  
Model Based ◽  
Input Control ◽  
Position Control System

Nonlinear Position Control of Digital Hydraulic Cylinder Despite Disturbance

2014 ◽  
Vol 998-999 ◽  
pp. 638-641
Author(s):  
Shi Jie Xu ◽  
J.F. Xing ◽  
Li Kun Peng
Keyword(s):  
Control System ◽  
Lyapunov Function ◽  
Linear Matrix Inequality ◽  
Nonlinear Model ◽  
Position Control ◽  
Hydraulic Cylinder ◽  
Linear Matrix ◽  
Matrix Inequality ◽  
Nonlinear Controller ◽  
Position Control System

A nonlinear controller is presented for a digital hydraulic cylinder against disturbance. We first establish the nonlinear model of digital hydraulic cylinder position control system. Then a Lyapunov function and a nonlinear controller are presented. The controller designing problem is translated into the problem of solving a linear matrix inequality. The experiment results show that the controller proposed by this paper has much better performance than traditional one.

The Dynamic Characteristics of an Electro-Hydraulic Servovalve

1976 ◽  
Vol 98 (4) ◽  
pp. 395-406 ◽  
Author(s):  
D. J. Martin ◽  
C. R. Burrows
Keyword(s):  
Control System ◽  
Steady State ◽  
Dynamic Characteristics ◽  
Position Control ◽  
Experimental System ◽  
Second Order ◽  
Frequency Responses ◽  
Model Based ◽  
Valve Model ◽  
Position Control System

The frequency responses of an experimental electro-hydraulic position control system and a simulation of the system are compared. Three different valve models are used in the simulation in an attempt to highlight the important parameters of an electro-hydraulic servovalve. It is found that a second order compensated valve model based on steady-state considerations provides a good correlation with the experimental system up to 35Hz and can be used for stability calculations up to 80Hz.

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