Hierarchical Control of Body Height and Adjustable Damping in Air Suspension Hybrid System
[1]HU Qiguo,WEI Chen,LU Wei,et al.Hierarchical Control of Body Height and Adjustable Damping in Air Suspension Hybrid System[J].Journal of Zhengzhou University (Engineering Science),2023,44(03):96-103.[doi:10.13705/j.issn.1671-6833.2023.03.009]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
44
Number of periods:
2023 03
Page number:
96-103
Column:
Public date:
2023-04-30
- Title:
- Hierarchical Control of Body Height and Adjustable Damping in Air Suspension Hybrid System
- Keywords:
- air suspension; mixed logical dynamical; hybrid system; hybrid model predictive control; hierarchical control
- CLC:
- U463. 33
- DOI:
- 10.13705/j.issn.1671-6833.2023.03.009
- Abstract:
- To address the difficult problem of coordinated control of body height and damper damping force during air suspension body height adjustment control, a hierarchical control strategy of air suspension body height and adjustable damping based on the mixed logic dynamic (MLD) model was proposed. Considering the hybrid characteristics of the air suspension in the process of inflating and deflating, the MLD modelling method was used to establish a nonlinear air suspension hybrid model with solenoid valves and magnetorheological dampers. The hybrid automaton describing the switching state of the solenoid valves was designed for the upper level control of body height adjustment, and the input current of the magneto rheological dampers was controlled at the lower level based on the predictive control method of the hybrid model. And then hierarchical control of body height and adjustable damping was realized by changing the switching state of the solenoid valves and the input current of the magneto rheological dampers. Through the simulation verification in random road excitation conditions, it could be concluded that the proposed control method could effectively track vehicle height while reducing vehicle acceleration by 34.33% and 34.34% compared to passive suspension and hybrid model predictive control, respectively, which could not only improve the ride comfort of the vehicle, but also directly prevent the frequent switching of solenoid valves and extending the service life of solenoid valves.
- References:
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Last Update:
2023-05-09