Abstract
In order to effectively realize the damping control and regenerative energy recovery of vehicle suspension, a new kind of hybrid active suspension structure with the ball screw actuator and magnetorheological (MR) damper is put forward. Firstly, for the analysis of the suspension performance, a quarter dynamic model of vehicle hybrid suspension is established, and at the same time, the mathematical models of MR damper and ball screw actuator are founded. Secondly, the active mode with damping switching control of the hybrid suspension and the semiactive mode with feedback adjustment of the electromagnetic damping force of the hybrid suspension are analyzed. Then, the multimode coordinated control system of the hybrid suspension is designed. Under the cyclic driving condition, the damping performance and energy consumption characteristics of the hybrid suspension are simulated by MATLAB/Simulink software. Finally, the bench tests of the hybrid suspension system are done. The simulation and experimental results show that compared with passive suspension, the root mean square of the sprung mass acceleration of the hybrid suspension with the active mode and semiactive mode is, respectively, reduced by 39% and 16% under the random road. The damping effect of the hybrid suspension system is obvious.
Highlights
A controllable actuator is used to replace the corresponding components of original passive suspension, which is named as an active suspension
The regenerative energy active suspension structures are used to recover vibration energy, which is used for the active control of the suspension
The average regenerative power of the ball screw actuator is 26.96 W, and the average of the MR damper energy consumption power is 1.78 W. erefore, the pure average power consumption of the hybrid suspension is −0.43 W, and the test results are basically consistent with the simulation
Summary
A controllable actuator is used to replace the corresponding components of original passive suspension, which is named as an active suspension. Wang et al [13, 14] proposed a hybrid suspension structure with parallel damping variable shock absorber, designed the variable damping of the suspension in different working modes, and carried out the simulations and experimental research studies; the results show that for the suspension structure, the energy consumption under the active control mode was reduced. It is mainly composed of spring, MR damper, ball screw actuator, controller, battery, corresponding signal detection device, and so on. E motor transforms the rotation motion into the up and down motion, and the active control of the suspension is realized At this time, the energy consumed by the ball screw actuator is supplied by the battery. In the semiactive and active control of the suspension, the energy consumed by the MR damper is all provided by the battery
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