- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | SUN Feng, XING Dazhuang, ZHOU Ran, JIN Junjie, XU Fangchao. LQR Control Strategy for Electromagnetic Active Suspension Considering Energy Consumption[J]. Journal of Southwest Jiaotong University, 2023, 58(4): 754-760, 798. doi: 10.3969/j.issn.0258-2724.20220815
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In order to reduce the excessive power consumption of vehicle electromagnetic active suspension, a modified linear quadratic regulator (LQR) control strategy considering energy consumption was raised. Firstly, the structure of electromagnetic active suspension was introduced. The thrust model of the linear motor was established by the equivalent magnetic circuit method, and the dynamic model of electromagnetic active suspension was built. Secondly, based on the optimization model of weighting coefficients in the original LQR control strategy, a constraint condition considering energy consumption was put forward, and a modified LQR control strategy was designed. Finally, MATLAB/Simulink was adopted for simulations, and the correctness of the controller was verified by active force values. Energy consumption and dynamic performance in random road were compared. The results show that the active force value of the modified LQR control strategy meets the optimization constraint condition with a probability of 99.89%. Compared with the original LQR control strategy, the modified LQR control strategy reduces the root-mean-square (RMS) of power by 80.29%. In addition, there is no significant difference in the RMS of suspension working space, and the RMS of dynamic tyre deformation is 5% lower than that of the original LQR control strategy. The reduction of body vertical acceleration can still reach more than 50% of the original LQR control strategy.
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