scholarly journals Quasi-Sliding Networked Control of Systems Subject to Unbounded Disturbance with Limited Rate of Change

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Andrzej Bartoszewicz ◽  
Paweł Latosiński
Keyword(s):  
Sliding Mode Control ◽  
Control Strategy ◽  
Sliding Mode ◽  
Rate Of Change ◽  
Networked Control ◽  
Sliding Mode Controller ◽  
System State ◽  
The Past ◽  
State Measurement ◽  
Measurement Delay

This paper concerns network based sliding mode control of linear plants with state measurement delay. The considered plants are subject to unbounded disturbance, but it is assumed that the change of disturbance value between each two subsequent sampling instants is limited. In order to combat the unpredictable disturbance in the environment with state measurement delay, a novel sliding mode controller has been introduced. It utilizes two nominal models of the plant to drive the system state along a desired trajectory and counteract the predicted effect of the past disturbance on the system. It has been proven that applying the new control strategy to the plant confines the system state to a defined band around the sliding hyperplane.

Multirate Output Feedback Based Stochastic Sliding Mode Control

2016 ◽  
Vol 138 (12) ◽  
Author(s):  
A. J. Mehta ◽  
B. Bandyopadhyay
Keyword(s):  
Sliding Mode Control ◽  
Output Feedback ◽  
Sliding Mode ◽  
Design Procedure ◽  
Sliding Mode Controller ◽  
The Past ◽  
Mode Control ◽  
Noise Covariance ◽  
Bounded Uncertainty ◽  
The Stability

In this paper, a multirate output feedback (MROF) based discrete-time sliding mode control for the stochastic system with slowly varying bounded uncertainty is proposed. The states are estimated by the multirate Kalman filter and are used for designing the stochastic sliding mode controller which guarantee the stability under the bounded uncertainty and the uncertain noise covariance. The proposed algorithm has advantage of computational and implementation simplicity as it requires only the past output and input information. The stochastic sliding band (SSB) is also calculated which is found to be wider as compared to the state feedback case. Finally, the design procedure for stochastic sliding mode controller is demonstrated with an illustrative example.

scholarly journals Research on Wind Turbine Converter Control Based on Resonant Sliding Film Controller

2021 ◽  
Vol 236 ◽  
pp. 01020
Author(s):  
XU Wen-kuan ◽  
ZHANG You-peng
Keyword(s):  
Sliding Mode Control ◽  
Wind Turbine ◽  
Control Strategy ◽  
Sliding Mode ◽  
Control Object ◽  
Film Surface ◽  
Sliding Mode Controller ◽  
Grid Voltage ◽  
Mode Control ◽  
Unbalanced Grid

A resonant sliding mode control strategy based on the resonant sliding film surface is proposed to control the turbine-side converter of the wind turbine so that the wind turbine can be connected to the grid smoothly under the condition of unbalanced grid voltage. Taking the doubly-fed asynchronous wind generator working under unbalanced grid voltage as the control object, establish its mathematical model and its generator-side converter. Taking the instantaneous power in the α β static coordinate system as the state variable of the sliding mode controller, the resonant sliding mode controller is studied, its parameters are designed, and experiments are carried out in the simulation platform MATLAB. A 1.5MW motor model was established and tested, and it was verified that the resonant sliding mode control strategy can control the grid voltage without static error and realize the smooth grid connection of wind turbines.

A Buck Converter Design Based on Sliding Mode Control Strategy

2013 ◽  
Vol 401-403 ◽  
pp. 2033-2036
Author(s):  
Yu Gao ◽  
Chu Zhou ◽  
Bin Zhou ◽  
Shao Cheng Qu
Keyword(s):  
Sliding Mode Control ◽  
Control Strategy ◽  
Sliding Mode ◽  
Buck Converter ◽  
Sliding Mode Controller ◽  
Control Approach ◽  
Reaching Law ◽  
Mode Control ◽  
Result Show ◽  
Converter Design

A sliding mode controller for buck converter based on PWM technology is discussed.Firstly, the schematic diagram of buck converter circuit based on a slidingmode control strategy is designed. Then a sliding mode control approach basedon reaching law is constructed. A circuit model based on MULTISIM is proposed.Finally, the simulation result show that the proposed method can effectively improvethe system dynamic characteristics.

scholarly journals A Sliding Mode Control Strategy for an ElectroHydrostatic Actuator with Damping Variable Sliding Surface

Actuators ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 3
Author(s):  
Mingkang Wang ◽  
Yan Wang ◽  
Rongrong Yang ◽  
Yongling Fu ◽  
Deming Zhu
Keyword(s):  
Sliding Mode Control ◽  
Control Strategy ◽  
Sliding Mode ◽  
Control Strategies ◽  
Sliding Mode Controller ◽  
Sliding Surface ◽  
Extended State ◽  
Mode Control ◽  
Simulation Results ◽  
Working Performance

Electro-hydrostatic actuator (EHA) has significance in a variety of industrial tasks. For the purpose of elevating the working performance, we put forward a sliding mode control strategy for EHA operation with a damping variable sliding surface. To start with, a novel sliding mode controller and an extended state observer (ESO) are established to perform the proposed control strategy. Furthermore, based on the modeling of the EHA, simulations are carried out to analyze the working properties of the controller. More importantly, experiments are conducted for performance evaluation based on the simulation results. In comparison to the widely used control strategies, the experimental results establish strong evidence of both overshoot suppression and system rapidity.

Sliding Mode Control of an Actuated Knee Joint Orthosis

2021 ◽  
Vol 15 ◽  
Author(s):  
Imen Saidi ◽  
Asma Hammami
Keyword(s):  
Sliding Mode Control ◽  
Lower Limb ◽  
Sliding Mode ◽  
Position Tracking ◽  
Sliding Mode Controller ◽  
Mechanical Device ◽  
Tracking Errors ◽  
Mode Control ◽  
Speed Tracking ◽  
Human Morphology

Introduction: In this paper, a robust sliding mode controller is developed to control an orthosis used for rehabilitation of lower limb. Materials and Methods: The orthosis is defined as a mechanical device intended to physically assist a human subject for the realization of his movements. It should be adapted to the human morphology, interacting in harmony with its movements, and providing the necessary efforts along the limbs to which it is attached. Results: The application of the sliding mode control to the Shank-orthosis system shows satisfactory dynamic response and tracking performances. Conclusion: In fact, position tracking and speed tracking errors are very small. The sliding mode controller effectively absorbs disturbance and parametric variations, hence the efficiency and robustness of our applied control.

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