Mathematical modeling and DLQR based controller design for a non-minimum phase Electro Hydraulic Servo system (EHS)

2016 ◽  
Author(s):  
Mazid Ishtique Ahmed ◽  
A.K.M Azad
Keyword(s):  
Mathematical Modeling ◽  
Controller Design ◽  
Servo System ◽  
Minimum Phase ◽  
Hydraulic Servo ◽  
Hydraulic Servo System

scholarly journals Design, Mathematical Modeling and Force Control for Electro-Hydraulic Servo System With Pump-Valve Compound Drive

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 171988-172005
Author(s):  
Bin Yu ◽  
Qixin Zhu ◽  
Jing Yao ◽  
Junxiao Zhang ◽  
Zhipeng Huang ◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Force Control ◽  
Servo System ◽  
Hydraulic Servo ◽  
Pump Valve ◽  
Hydraulic Servo System

A Suboptimal Controller Design Method for the Energy Efficiency of a Load-Sensing Hydraulic Servo System

1991 ◽  
Vol 113 (3) ◽  
pp. 487-493 ◽  
Author(s):  
S. D. Kim ◽  
H. S. Cho
Keyword(s):  
Energy Efficiency ◽  
Controller Design ◽  
Design Method ◽  
Servo System ◽  
Control Performance ◽  
Response Characteristics ◽  
Load Sensing ◽  
Highly Nonlinear ◽  
Hydraulic Servo ◽  
Hydraulic Servo System

The dynamic characteristics of a load-sensing hydraulic servo system are complex and highly nonlinear and, furthermore, the stability is critically deteriorated compared with that of the conventional hydraulic servo systems. Another property of the systems is that the setting value of the pump pressure-compensator considerably affects energy efficiency as well as control performance of the system. These features significantly add complexity to the controller design of the load-sensing systems. To guarantee satisfactory control performance and energy efficiency of the system an effective controller design method, therefore, needs to be developed. This paper considers a suboptimal PID control for the velocity control problem of a loadsensing hydraulic servo system. To show the effectiveness of the controller a series of simulations and experiments were performed. Both results show that the proposed suboptimal controller can produce satisfactory response characteristics and yield an effective trade-off between control performance and energy efficiency of the system.

Study of Hydraulic Servo System Based on Fuzzy Sliding Mode Algorithm

2013 ◽  
Vol 753-755 ◽  
pp. 2674-2678
Author(s):  
Kun Yang ◽  
Cai Jun Liu ◽  
Shu Min Liu
Keyword(s):  
Control Algorithm ◽  
Sliding Mode ◽  
Servo System ◽  
Time Varying ◽  
External Interference ◽  
System A ◽  
Hydraulic Servo ◽  
Fuzzy Sliding Mode ◽  
Hydraulic Servo System ◽  
Position Servo

Based on the situation that the hydraulic position servo system is easily influenced by the external interference and the parameters of which are different with time-varying, the fuzzy control can soften the buffeting and the sliding algorithm has no the same problems as the hydraulic position servo system, a brandly-new fuzzy sliding control algorithm is designed. In the simulation process, within the parameters of simulated time-varying and outside strong interference, the results show that the hydraulic servo system based on fuzzy sliding mode control algorithm has a greater resistance to internal and external interference and time-varying parameters.

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