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International Journal of Automotive Technology > Volume 20(6); 2019 > Article
International Journal of Automotive Technology 2019;20(6): 1221-1236.
doi: https://doi.org/10.1007/s12239-019-0114-8
Jigen Fang1, Xifeng Wang1, Jinjun Wu1, Shuai Yang3, Liang Li2, Xiang Gao2, Yue Tian3
1China Academy of Machinery Science and Technology
2Tsinghua University
3Yanshan University
PDF Links Corresponding Author.  Liang Li , Email. liangl@tsinghua.edu.cn
Accurate electromagnetic force control in a high speed on/off valve actuator (HSVA) can improve the performance of a vehicle braking system, and an accurate theoretical model is the key to smoothly controlling the high speed on/off valve. Therefore, a nonlinear model of an HSVA is proposed in this paper. Three subsystems are modeled as a spring/ mass/damper system, a nonlinear resistor/inductor system and a multiwall heat transfer system, respectively. Then, a slidingmodel controller combined with a sliding-model observer is designed to adjust the electromagnetic force for an accurate HSVA state control, taking the effect of the coil heating into account. The feasibility of the three submodels and the slidingmodel controller are verified by comparing the simulation results with the experimental results obtained on a test bench. Our study shows that the three subsystems are coupled to one another through resistance, displacement, and temperature. When the excitation voltage exceeds 9 V, the coil temperature can reach more than 150 degrees Celsius within 300 s, and the electromagnetic force decreases by approximately 30 %. However, by applying the above control strategy, the electromagnetic force can also be stable, fluctuating within 5 % even if the temperature of the coil rises to the thermal equilibrium temperature.
Key Words: High speed on/off valve actuator, Spring/mass/damper system, Resistor/inductor system, Multiwall heat transfer system, Sliding-model controller
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