scholarly journals A Study of Fuzzy Sliding Mode Variable Structure Control Strategy for Wind Power Aided Pumping Water Machine Based on T-S Model

2016 ◽  
Vol 04 (02) ◽  
pp. 42-49
Author(s):  
福银 杜
Keyword(s):  
Wind Power ◽  
Control Strategy ◽  
Sliding Mode ◽  
Variable Structure Control ◽  
Variable Structure ◽  
Structure Control ◽  
Fuzzy Sliding Mode ◽  
Sliding Mode Variable Structure ◽  
S Model

The Research Based on Fuzzy Sliding Mode Control for Linear Double Inverted Pendulum

2014 ◽  
Vol 926-930 ◽  
pp. 1463-1467
Author(s):  
Li Ding ◽  
Shu Bo Qiu
Keyword(s):  
Sliding Mode Control ◽  
Inverted Pendulum ◽  
Sliding Mode ◽  
Variable Structure Control ◽  
Variable Structure ◽  
Pendulum System ◽  
Structure Control ◽  
Inverted Pendulum System ◽  
Fuzzy Sliding Mode ◽  
Sliding Mode Variable Structure

This paper involves a linear double inverted pendulum system whose the state space model is established by Lagrange function. In order to solve the chattering problem of the conventional quasi-sliding mode variable structure control, this linear double inverted pendulum system applies the fuzzy control theory to adjust the parameterwhich is in the sliding mode variable structure control law. Then the fuzzy theory is utilized to design the sliding mode and deduce the fuzzy sliding mode reaching law. The significance of this method is that it diffuses the control signal, reduces or avoids the chattering phenomenon of sliding mode control. For the most, the simulation results show that the linear double inverted pendulum system based on fuzzy sliding mode variable structure control not only retains the strong robustness of sliding mode variable structure control, but also improves the dynamic quality of the system and weakens the buffeting of the system. Thus the method is proved to have certain research.

scholarly journals Position Control Study on Pump-Controlled Servomotor for Steam Control Valve

Processes ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 221
Author(s):  
Guishan Yan ◽  
Zhenlin Jin ◽  
Tiangui Zhang ◽  
Penghui Zhao
Keyword(s):  
Control Strategy ◽  
Position Control ◽  
Sliding Mode ◽  
Variable Structure Control ◽  
Control Valve ◽  
Good Control ◽  
Variable Structure ◽  
Structure Control ◽  
Sliding Mode Variable Structure ◽  
Valve Control

In steam turbine control and actuation, the steam control valve plays a key role in operability and reliability. The electrohydraulic regulating system for the steam control valve, usually called the servomotor, needs to be reliable and high performing under nonlinear excitation interference in actual conditions. Currently, electrohydraulic servo valve control technology is widely used in servomotors. Although this technology has good control performance, it still has some technical defects, such as poor antipollution ability, low energy efficiency, large volume size, and limited installation space. Aiming at the abovementioned technical shortcomings of electrohydraulic servo valve control technology, a servomotor-pump-hydraulic cylinder volume control scheme is proposed in this paper, forming a pump-controlled servomotor for the steam control valve. By analyzing the working principle of the pump-controlled servomotor position control in the steam control valve, the mathematical model of a pump-controlled servomotor for the steam control valve is established. The sliding mode variable structure control strategy is proposed, and the variable structure control law is solved by constructing a switching function. To verify the performance of the proposed control method, experimental research was conducted. The research results show that the proposed sliding mode variable structure control strategy has a good control effect, which lays the theoretical and technical foundation for the engineering application and promotion of pump-controlled servomotors for steam control valves and helps the technical upgrade and product optimization of steam turbines.

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