Research on Straight Line Stability Control Strategy of Four Wheel Drive Vehicle Based on the Sliding Mode Variable Structure Control and Optimization Algorithm

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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Sliding Mode Variable Structure Control and Real-Time Optimization of Dry Dual Clutch Transmission during the Vehicle’s Launch

Mathematical Problems in Engineering ◽

10.1155/2014/494731 ◽

2014 ◽

Vol 2014 ◽

pp. 1-18 ◽

Cited By ~ 1

Author(s):

Zhiguo Zhao ◽

Haijun Chen ◽

Qi Wang

Keyword(s):

Control Strategy ◽

Sliding Mode ◽

Variable Structure ◽

Dual Clutch Transmission ◽

Structure Control ◽

Vehicle Velocity ◽

Coordinating Control ◽

Sliding Mode Variable Structure ◽

Driver’S Intention ◽

Real Time Optimization

In order to reflect driving intention adequately and improve the launch performance of vehicle equipped with five-speed dry dual clutch transmission (DCT), the issue of coordinating control between engine and clutch is researched, which is based on the DCT and prototype car developed independently. Four-degree-of-freedom (DOF) launch dynamics equations are established. Taking advantage of predictive control and genetic algorithm, target tracing curves of engine speed and vehicle velocity are optimally specified. Sliding mode variable structure (SMVS) control strategy is designed to track these curves. The rapid prototyping experiment and test are, respectively, conducted on the DCT test bench and in the chassis dynamometer. Results show that the designed SMVS control strategy not only effectively embodies the driver’s intention but also has strong robustness to the vehicle parameter’s variations.

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Control Strategy Used on UAV Motion System

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1028.186 ◽

2014 ◽

Vol 1028 ◽

pp. 186-190

Author(s):

Hong Cheng Zhou ◽

Zhi Peng Jiang

Keyword(s):

Control Strategy ◽

Control Method ◽

Sliding Mode ◽

Variable Structure ◽

Control Law ◽

Low Velocity ◽

Structure Control ◽

Motion System ◽

Sliding Mode Variable Structure ◽

And Control

The servo control methods of 6-DOF motion configuration are researched. Based on analysis for characteristic of the motion configuration, the control strategy and control law used on the motion control system are presented. The controller in velocity tracking loop and location loop are respectively designed by frequency correcting method and normal control method which belongs to classical control theory. Sliding mode variable structure control method is presented for location control law designing, against the super low velocity creep caused by friction disturbance, so that the problem of location control loop low velocity creeping is solved, and a simulating experimentation demonstrate the effectiveness of the proposed approach.

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Based on Fuzzy Terminal Sliding Mode Variable Structure Control Strategy

2010 International Conference on Intelligent Computation Technology and Automation ◽

10.1109/icicta.2010.327 ◽

2010 ◽

Author(s):

Guoqiang Zhao ◽

Zhankui Song

Keyword(s):

Control Strategy ◽

Sliding Mode ◽

Variable Structure Control ◽

Variable Structure ◽

Terminal Sliding Mode ◽

Structure Control ◽

Sliding Mode Variable Structure

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Stability Control for Dual-Motor Independent Drive Electric Vehicle Based on Sliding Mode Control

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.655-657.1403 ◽

2013 ◽

Vol 655-657 ◽

pp. 1403-1409

Author(s):

Cheng Lin ◽

Chun Lei Peng

Keyword(s):

Electric Vehicle ◽

Degrees Of Freedom ◽

Sliding Mode ◽

Control Variable ◽

Variable Structure ◽

Stability Control ◽

Driver Model ◽

Structure Control ◽

Sliding Mode Variable Structure ◽

Set Up

Two motors of Dual-Motor Independent Drive Electric Vehicle can be controlled independently, which can enrich the method of stability control for vehicle. In order to fully take use of the advantage，The man-vehicle system with eight degrees of freedom ,which includes Magic Formula tire model and driver model based on Preview Follower Theory, was set up by using MATLAB/SIMULINK. Considering the complexity of the driving condition and the nonlinear time-varying characteristics of the vehicle systems, a controller based on Sliding mode variable structure control theory was set up, which selected Yaw rate as Control variable and two motors as actuators. The simulation results show that handling and stability of vehicle can be improved greatly by the Sliding mode controller.

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PID Controller of Sprayer Chassis by Sliding Mode

Journal of Control Science and Engineering ◽

10.1155/2017/5713160 ◽

2017 ◽

Vol 2017 ◽

pp. 1-9

Author(s):

Hua Zhang

Keyword(s):

Control Strategy ◽

Pid Control ◽

Sliding Mode ◽

Variable Structure ◽

Coordinated Control ◽

Control Voltage ◽

Proportional Valve ◽

Straight Line ◽

Sliding Mode Variable Structure ◽

Yaw Moment

In order to solve the straight line drive coordinated control problem of the four-wheel independent drive sprayer chassis, the dynamic model of sprayer chassis and electromagnetic proportional valve controlled hydraulic motor model are established. The additional yaw moment is designed to rectify the deviation with sliding mode variable structure control. PID control strategy is used to calculate the control voltage adjustment of the electromagnetic proportional valve. The simulation results show that the accumulative deviation of the chassis is 0.2 m out of 100 m when the coordinated control strategy is adopted on different adhesive coefficient pavement, which is much smaller than the value without control. The test results of test prototype show that the yaw acceleration of the chassis can be as low as −0.0132 m/s2 on different adhesive coefficient pavement with coordinated control, which is smaller than the value without control, and the straight line drive requirements are met. It is feasible to combine sliding mode variable structure with PID control and use the electromagnetic proportional control technology in the straight line drive coordinated control of sprayer chassis by adding the yaw moment to rectify the deviation of chassis based on the yaw acceleration detection.

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