Nonlinear Modeling and Coordinate Optimization of a Semi-Active Energy Regenerative Suspension with an Electro-Hydraulic Actuator

Kou, Farong; Du, Jiafeng; Wang, Zhe; Liu, Dong; Xu, Jianan

doi:10.3390/a11020012

Cited by 16 publications

(11 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Han, from Tongji University, designed a control strategy of model feedforward compensation and dead zone compensation for nonlinear disturbance problems such as creep and oscillation in pressure control, which improved the accuracy of pressure control and the robustness of the system [18]. Kou, from the Xian University of Science and Technology, analyzed the influence law of motor on system force and proposed a current controller based on innerloop motor speed to realize force tracking control and improve the dynamic characteristics of the DDVC electro-hydraulic servo system [19]. Zhu, from Jiangsu University, introduced the Popov frequency criterion method to determine the absolute stability of the DDVC electro-hydraulic servo system under the influence of nonlinear disturbance factors [20].…”

Section: Introductionmentioning

confidence: 99%

Research on Feedback-Linearized Sliding Mode Control of Direct-Drive Volume Control Electro-Hydraulic Servo System

et al. 2021

View full text Add to dashboard Cite

In this paper, a control strategy combining the feedback linearization theory and sliding mode variable structure theory is proposed to solve various nonlinear factors, uncertainty of external disturbance and high-precision pressure control problems in the Direct-Drive Volume Control (DDVC) electro-hydraulic servo system. The nonlinear mathematical model of the DDVC electro-hydraulic servo system is established, and the nonlinear factors in the system are accurately linearized by the feedback linearization theory. The uncertainty of external disturbance in the system is compensated by the sliding mode control variable structure theory. The feedback-linearized sliding mode control algorithm proposed in this paper is verified using the DDVC electro-hydraulic servo system experimental platform. The experimental results show that, compared with the classical PID control, the proposed control algorithm can effectively improve the pressure output precision, as well as the dynamic response characteristics, of the DDVC system.

show abstract

Section: Introductionmentioning

confidence: 99%

Research on Feedback-Linearized Sliding Mode Control of Direct-Drive Volume Control Electro-Hydraulic Servo System

et al. 2021

View full text Add to dashboard Cite

show abstract

“…However, the control performance of the PCSM has always been an important factor that impede its promotion. This study improves the system robustness and further improves the position control accuracy, which lays a good foundation for the promotion of the PCSM [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

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

Yan

Jin

Zhang³

et al. 2021

Processes

View full text Add to dashboard Cite

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.

show abstract

“…Active suspension can effectively improve vehicle riding comfort and handling stability by outputting active force of the actuator [1][2][3]. However, the active suspension actuator needs to consume a large amount of external energy and it reduces the economic performance of the vehicle [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Endocrine Composite Skyhook-Groundhook Control of Electromagnetic Linear Hybrid Active Suspension

Kou

Jing

Chen

et al. 2020

Shock and Vibration

Self Cite

View full text Add to dashboard Cite

In order to effectively improve vehicle riding comfort, handling stability, and realize vibration energy recovery, a new kind of electromagnetic linear hybrid active suspension (EMLHAS) integrated with linear motor and solenoid valve shock absorber is put forward. Firstly, for the analysis of the suspension performance, a quarter dynamic model of EMLHAS is established. At the same time, the mathematical models of a linear motor, including the active state and energy-regenerative state, are found. The correctness of mathematical models for the linear motor in the active and energy-regenerative states is verified by means of characteristic tests. Moreover, the velocity characteristic tests of solenoid valve shock absorber are carried out to determine its mathematical polynomial model in the semiactive state. Then, a new kind of multimode endocrine composite skyhook-groundhook control strategy is proposed. The suspension motion is divided into four modes according to the driving conditions of the vehicle. An endocrine control with long feedback and short feedback is combined with the skyhook-groundhook control. The control laws of the skyhook-groundhook controller and endocrine controller are, respectively, designed. Finally, the simulation analysis of suspension dynamic performance and energy-regenerative characteristic is done. The results show the control effect of endocrine composite skyhook-groundhook control is better than that of skyhook-groundhook control, which improves vehicle riding comfort and handling stability. Moreover, part of vibration energy is recovered.

show abstract

Nonlinear Modeling and Coordinate Optimization of a Semi-Active Energy Regenerative Suspension with an Electro-Hydraulic Actuator

Cited by 16 publications

References 13 publications

Research on Feedback-Linearized Sliding Mode Control of Direct-Drive Volume Control Electro-Hydraulic Servo System

Research on Feedback-Linearized Sliding Mode Control of Direct-Drive Volume Control Electro-Hydraulic Servo System

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

Endocrine Composite Skyhook-Groundhook Control of Electromagnetic Linear Hybrid Active Suspension

Contact Info

Product

Resources

About