- 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: | CAO Fuyi, QIU Futao, YUAN Tianqi, YAN Xianghai. Adaptive Sliding Mode Control of Shift Clutch In Hydraulic Mechanical Transmission Based on Linear Quadratic Optimization[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20250285
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To improve the torque transmission control accuracy of the shift clutch in hydraulic mechanical transmission (HMT) and enhance its shift quality, an adaptive sliding mode control method based on linear quadratic optimization was proposed. Firstly, the shift dynamics model of HMT and the numerical model of the clutch were constructed. Secondly, the optimal torque transmission trajectory of the shift clutch was solved under the target functional based on the linear quadratic optimization model. Combined with the dynamic friction coefficient model, the trajectory variable was converted into the expected oil pressure trajectory considering the time-varying effect of the lubricating oil film and the dynamic contact characteristics of the friction interface. Finally, the adaptive sliding mode control algorithm was used to track and control the expected oil pressure trajectory. Simulation results show that compared with the direct application of the linear quadratic control scheme, the proposed algorithm effectively improves the torque transmission control accuracy of the shift clutch, shortens the shift time by 13.8%, reduces the sliding friction work by 11.2%, and decreases the maximum shock by 39.1%. Experiments further confirm that the algorithm not only effectively improves the torque transmission control accuracy of the shift clutch but also improves the shift quality of HMT. The research results can provide a reference for the formulation of shift control strategies in the engineering application of HMT devices.
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