scholarly journals Hybrid Model Predictive Control of Semiactive Suspension in Electric Vehicle with Hub-Motor

2021 ◽  
Vol 11 (1) ◽  
pp. 382
Author(s):  
Hong Jiang ◽  
Chengchong Wang ◽  
Zhongxing Li ◽  
Chenlai Liu
Keyword(s):  
Electric Vehicle ◽  
Hybrid Model ◽  
Control Algorithm ◽  
Electromechanical Coupling ◽  
Ride Comfort ◽  
Control Method ◽  
Coupling Effect ◽  
Damping Force ◽  
Road Excitation ◽  
Semiactive Suspension

In hub-motor electric vehicles (HM-EVs), the unbalanced electromagnetic force generated by the HM will further deteriorate the dynamic performance of the electric vehicle. In this paper, a semiactive suspension control method is proposed for HM-EVs. A quarter HM-EV model with an electromechanical coupling effect is established.The model consists of three parts: a motor model, road excitation model and vehicle model. A hybrid model predictive controller (HMPC) is designed based on the developed model, taking into account the nonlinear constraints of damping force. The focus is on improving the vertical performance of the HM-EV. Then, a Kalman filter is designed to provide the required state variables for the controller. The proposed control algorithm and constrained optimal control (COC) algorithm are simulation compared under random road excitation and bump road excitation, and the results show that the proposed control algorithm can improve ride comfort, reduce motor vibration, and improve handling stability more substantially.

scholarly journals MR Damper-Based Vibration Suppression Method for Control Moment Gyroscope

2018 ◽  
Vol 36 (5) ◽  
pp. 884-889
Author(s):  
Wendong Wang ◽  
Xing Ming ◽  
Yang Chu ◽  
Minghui Liu ◽  
Yikai Shi
Keyword(s):  
Active Control ◽  
Control Algorithm ◽  
Vibration Suppression ◽  
Control Method ◽  
Magnetorheological Damper ◽  
Magnetic Flux Density ◽  
Damping Force ◽  
Control Moment Gyroscope ◽  
Control Moment ◽  
Suppression Method

To restrain the interference of micro-vibration caused by Control Moment Gyroscope, a new control method based on Magnetorheological damper was proposed in this paper. A mechanical model based on the structure of the presented design was built, and the semi-active control algorithm of damping force was proposed for the designed Magnetorheological damper. The magnetic flux density and other magnetic field parameters were considered and analyzed in Maxwell, and also the related hardware circuit which implements the control algorithm was prepared to test the presented design and algorithm. The results of simulation and experiments show that the presented Magnetorheological damper model and semi-active control algorithm can complete the requirements, and the vibration suppression method is efficient for Control Moment Gyroscope.

Simulation and Analysis of Ride Comfort of 4WD Electric Vehicle

2014 ◽  
Vol 574 ◽  
pp. 287-291
Author(s):  
Wei Hua Yang ◽  
You Rong Li ◽  
Zi Fan Fang ◽  
Kong De He
Keyword(s):  
Frequency Domain ◽  
Electric Vehicle ◽  
Time Domain ◽  
Ride Comfort ◽  
Spring Stiffness ◽  
Vibration System ◽  
Dynamics Model ◽  
Automobile Suspension ◽  
Road Excitation ◽  
Input Model

Taking the independent four motorized wheels driving electric vehicle (4WD EV) as study object, the method and index evaluating ride comfort of automobile suspension system were described, and the input model of random road excitation and the dynamics model of 1/4 vehicle vibration system were established, then the simulation of ride comfort of the established model was conducted, so the evaluating indexes’ responses in time domain and frequency domain were obtained. Above all, the changes of these indexes which are suspension damping, spring stiffness and un-sprung mass were analyzed, their effects on the ride comfort of electric vehicle driven by motorized wheel studied, thus provided reference for the development of electric vehicle driven by in-wheel motor.

Research on Coordinated Control of the Vehicle Chassis System Based on a Hybrid Model

2012 ◽  
Vol 152-154 ◽  
pp. 1747-1753
Author(s):  
Wu Wei Chen ◽  
Lin Feng Zhao ◽  
Jun Yang ◽  
Hui Zhu
Keyword(s):  
Control Systems ◽  
Hybrid Model ◽  
Ride Comfort ◽  
Control Method ◽  
System Modeling ◽  
Coordinated Control ◽  
Control Parameters ◽  
Braking System ◽  
Vehicle Chassis ◽  
Complicated Conditions

Based on the analysis of the movement relationship among systems such as the chassis suspension and the steering and braking system, simulation and testing are carried out on control system of the vehicle chassis system with a coordinated control method of the hybrid model. For the complex vehicle chassis system, modeling and simulation focuses on the movement effects of the three subsystems, classifying complex under different conditions by control methods and testing control parameters separately. Based on the simulation results of the vehicle and the parameters of the controllers, software & hardware systems of the vehicle are designed, and the tests of the vehicle chassis system are carried out based on the hybrid model. The results indicate that under complicated conditions, control systems with the hybrid model can effectively improve the ride comfort, handling, and security.

A novel semi-active control strategy based on the cascade quantitative feedback theory for a vehicle suspension system

2018 ◽  
Vol 233 (7) ◽  
pp. 1851-1863 ◽  
Author(s):  
Jeyasenthil Ramamurthy ◽  
Seung-Bok Choi
Keyword(s):  
Ride Comfort ◽  
Control Method ◽  
Suspension System ◽  
Quantitative Feedback Theory ◽  
Damping Force ◽  
Outer Loop ◽  
Actuator Dynamics ◽  
Vibration Attenuation ◽  
Force Tracking ◽  
Magneto Rheological

This paper proposes a robust controller for semi-active suspension system with actuator dynamics using the quantitative feedback theory. It solves the vehicle vibration attenuation problem using the novel cascade approach. The proposed cascade quantitative feedback theory control approach consists of the inner and outer loop. The damping force tracking of the magneto-rheological damper is chosen as the inner loop, while the outer loop is for the vibration attenuation. The inner loop is added to the control structure to enhance damping force tracking capabilities. The damping force of the magneto-rheological damper depends on the many factors, such as the complex and nonlinear (hysteresis) dynamics and operating temperature. The actuator (magneto-rheological damper) dynamics is well approximated by a first-order model with an uncertain time constant which captures the essential dynamics. The simulation case study is conducted on a realistic quarter car suspension system to show the effectiveness of the proposed cascade control method. The proposed method is found to deliver superior performances, in terms of ride comfort and road holding, over the skyhook, [Formula: see text] control, and single-loop quantitative feedback theory control under the bump, sine, and random road disturbances.

An improved constant deceleration control method with extended shock velocity range for magnetorheological energy absorber

2021 ◽  
pp. 1045389X2110572
Author(s):  
Zhongqiang Feng ◽  
Dong Yu ◽  
Zhaobo Chen ◽  
Xudong Xing ◽  
Hui Yan
Keyword(s):  
Control Algorithm ◽  
Control Method ◽  
Velocity Range ◽  
Damping Force ◽  
Isolation System ◽  
Single Degree Of Freedom ◽  
Single Degree ◽  
Shock Mitigation ◽  
Energy Absorbers ◽  
Feasible Solutions

This paper proposed an extended constant deceleration (ECD) control method that can be used in the shock mitigation system with magnetorheological energy absorbers (MREAs). The ECD control method has three sections: zero controllable force (ZCF) section, constant deceleration (CD) section, and maximum damping force (MDF) section. Under the control of ECD, the system can stop at the end of MREA stroke without exceeding the maximum allowable deceleration. The ECD control algorithm is derived in a single-degree-of-freedom (SDOF) system. The controllable velocity range and the required controllable damping force of ECD control method are also derived, which can provide feasible solutions for the design of shock isolation system with MREAs. The performance of ECD control method is shown by applying to the drop-induced shock mitigation system with different drop velocities, different maximum controllable damping force, and MREA stroke. The results shows that the ECD control method not only has a large controllable velocity range and small controllable damping force requirement, but also can minimize the load transmitted to the system.

scholarly journals Modeling and Control of a Shear-Valve Mode MR Damper for Semiactive Vehicle Suspension

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Fanxu Meng ◽  
Jin Zhou
Keyword(s):  
Fuzzy Control ◽  
Control Algorithm ◽  
Passive Control ◽  
Vibration Suppression ◽  
Ride Comfort ◽  
Mr Damper ◽  
Suspension System ◽  
Vehicle Suspension ◽  
Fuzzy Control Algorithm ◽  
Semiactive Suspension

Aiming at demonstrating the feasibility and capability of applying magnetorheological (MR) dampers to the vehicle vibration control, the hyperbolic tangent model is established to characterize the performance of a shear-valve mode MR damper that was developed for a vehicle suspension system in this study. An experimentally derived differential evolution (DE) algorithm is used to find the optimal parameters of the model. To demonstrate the effectiveness of the MR damper for semiactive suspension systems, a model was constructed of a quarter-car suspension system with the damper. A fuzzy control algorithm with a correction factor was adopted to control the output force of the damper and obtain better overall control of the performance of the suspension system. Simulation results indicate that the improved fuzzy control algorithm provides a better ride comfort than normal fuzzy control and passive control. Furthermore, the semiactive suspension system displayed effectively vibration suppression thanks to the MR damper combined with corresponding control algorithms.

scholarly journals Robust Control for Active Suspension of Hub-Driven Electric Vehicles Subject to in-Wheel Motor Magnetic Force Oscillation

2020 ◽  
Vol 10 (11) ◽  
pp. 3929 ◽  
Author(s):  
Hang Wu ◽  
Ling Zheng ◽  
Yinong Li ◽  
Zhida Zhang ◽  
Yinghong Yu
Keyword(s):  
Robust Control ◽  
Permanent Magnet ◽  
Electric Vehicles ◽  
Magnetic Force ◽  
Ride Comfort ◽  
Control Method ◽  
Coupling Effect ◽  
Active Suspension ◽  
Electromagnetic Excitation ◽  
Force Oscillation

In this paper, after investigating the coupling effect in a permanent magnet synchronous in-wheel motor, a robust control method for active suspension of hub-driven electric vehicles (EVs) to enhance the performance of the in-wheel motor and the vehicle is proposed. Based on the electric vehicle model addressing the coupling effect between the electromagnetic excitation of the permanent magnet synchronous motor (PMSM) and the transient dynamics in EVs, the influence of the coupling effect on the motor and the vehicle performance is analyzed. The results reflect that the coupling effect in in-wheel motors intensifies the magnetic force oscillation, aggravates the eccentricity of the rotor, deteriorates the motor operation performance, and worsens the ride comfort. To suppress the magnetic force oscillation in motor and enhance the vehicle comfort, the active suspension system considering five aspects of suspension performance is introduced. Simultaneously, on the basis of Lyapunov stability theory, a reliable robust Hꝏ controller considering model uncertainties, actuator failure and electromagnetic force interference is designed. The simulation results reflect that the robust Hꝏ feedback controller can not only achieve better ride comfort, but also restrain the coupling effect in the motor. Meanwhile the other requirements such as the road holding capability, the actuator limitation, and the suspension deflection are also maintained. The proposed robust control method demonstrates a potential application in the practice of EV control.

An hourglass-type electromagnetic isolator with negative resistance electromagnetic shunt circuit

2020 ◽  
Vol 64 (1-4) ◽  
pp. 549-556
Author(s):  
Yajun Luo ◽  
Linwei Ji ◽  
Yahong Zhang ◽  
Minglong Xu ◽  
Xinong Zhang
Keyword(s):  
Vibration Isolation ◽  
Electromechanical Coupling ◽  
Coupling Effect ◽  
Negative Resistance ◽  
Isolation System ◽  
Amplitude Vibration ◽  
Vibration Responses ◽  
The Stability ◽  
Isolation Performance ◽  
Shunt Circuit

The present work proposed an hourglass-type electromagnetic isolator with negative resistance (NR) shunt circuit to achieve the effective suppression of the micro-amplitude vibration response in various advanced instruments and equipment. By innovatively design of combining the displacement amplifier and the NR electromagnetic shunt circuit, the current new type of vibration isolator not only can effectively solve the problem of micro-amplitude vibration control, but also has significant electromechanical coupling effect, to obtain excellent vibration isolation performance. The design of the isolator and motion relationship is presented firstly. The electromechanical coupling dynamic model of the isolator is also given. Moreover, the optimal design of the NR electromagnetic shunt circuit and the stability analysis of the vibration isolation system are carried out. Finally, the simulation results about the transfer function and vibration responses demonstrated that the isolator has a significant isolation performance.

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