Study on the integrated structure/control design method of magnetorheological damper for improving vehicle posture

Abstract

In order to achieve a good match between magnetorheological (MR) damper and vehicle Noise Vibration and Harshness (NVH) quality and improve vehicle posture while driving, an integrated design method of MR damper structure/control for vehicle vibration suppression was proposed considering the coupling effect between MR damper structure parameters and controller parameters. A controller was designed to control the damping force generated by the tapered channel MR damper. Furthermore, the damping force expression of the tapered flow mode MR damper was derived, and the damping force was introduced into the vehicle dynamics model. In order to improve the vehicle posture, an integrated structure/control platform combining response surface model, current controller and vehicle dynamics model was established. Based on integrated platform, the vehicle dynamics model and Fourier transform were adopted to extract the time-frequency characteristics of the design objective under different working conditions. In the optimization process, the damper structure was optimized by taking the time domain values as the constraints and the frequency domain values as the optimization goals. The results show that the proposed integrated design method of MR damper can obtain its global optimal structural parameters under different driving conditions. The acceleration root mean square (RMS) values and frequency domain values of vehicle were both reduced to varying degrees, achieving the purpose of improving the vehicle posture.

Multi-objective optimization design of magnetorheological damper and vehicle handling stability performance research

“…A tapered flow mode MR damper was designed for a certain passenger car, as shown in Figure 1 (Deng et al, 2022a). The materials of the inner and outer magnetic cores of the MR damper are both DT4, and a tapered damping channel is formed between the inner and outer magnetic cores.…”

“…The research object of this paper is the roll angle of the vehicle, so the fuzzy PID controller is designed to reduce the roll of the vehicle under the conditions of double line shift test, fishhook steering test, and steering wheel angle step test (Deng et al, 2022a). The The vehicle dynamics model based on simulation can provide different steering wheel angle input.…”

Theoretical and experimental study on performance of compound-driven MR valve-controlled damper

“…Therefore, the MR valvecontrolled damper is widely used in suspension systems [3]. The pressure drop at the valve inlet and outlet can be accurately controlled by changing operating currents, thereby adjusting the dynamic damping force [4,5].…”

Research on Current Drive System of Magnetorheological Damper Based on Fuzzy PI Control

“…Rashid, M. M [27] designed a hybrid fuzzy controller based on quarter suspension, and demonstrated through experiments that the designed hybrid fuzzy controller can effectively suppress random road disturbances and improve the smoothness of the vehicle. Deng, Z [28] designed a fuzzy PID control controller with the vehicle's vertical and pitch acceleration as the control target for the vibration reduction requirements of the vehicle magneto-rheological suspension system, and the simulation demonstrated that the designed controller can effectively improve the vehicle attitude. From the above studies, it can be observed that MRD devices and fuzzy PI control algorithms are now widely used in the field of intelligent vibration damping.…”