混合电磁悬架作动器设计与试验

Design and Experiment on Actuator for Hybrid Electromagnetic Suspension

摘要:

为了解决车用线性电磁作动器（直线电机）可靠性差的问题，设计了一种将直线电机与液压阻尼器集成的混合电磁作动器。采用改进天棚控制策略进行性能匹配，对混合电磁作动器的性能参数进行优化，得到天棚阻尼系数、被动阻尼系数以及直线电机需要提供的峰值电磁推力，并以优化得到的峰值电磁推力为优化目标，优化混合电磁作动器的结构参数。根据优化得到的结构参数试制实体样机，对其进行台架试验，包括混合电磁作动器的外特性试验，以及包含混合电磁作动器的混合电磁悬架主动控制试验。试验结果表明，设计的混合电磁作动器用于悬架系统时，能够较好地改善车辆动力学性能，与被动悬架相比，混合电磁悬架车身加速度和悬架动挠度分别降低了23.35%和14.97%，虽然轮胎动载荷增加了13.20%，但根据“3σ”原则，在可接受范围之内，验证了混合电磁作动器样机的有效性。

Abstract:

The structural scheme of hybrid electromagnetic actuator that integrates a tubular permanent magnet linear synchronous motor and a hydraulic damper was put forward to solve the problem that the linear electromagnetic actuator owned bad reliability. Modified skyhook control that matched the structure of hybrid electromagnetic actuator was used to optimize the performance parameters of hybrid electromagnetic actuator.Skyhook damping coefficient, passive damping coefficient and peak electromagnetic thrust force that linear motor needed to output were got. And the structural parameters of the hybrid electromagnetic actuator were optimized with the optimization goal of peak electromagnetic thrust force that linear motor needed to output. Finally, a prototype of the hybrid electromagnetic actuator was developed based on the optimized structural parameters and the bench tests on the prototype were conducted, including damping characteristics test of hybrid electromagnetic actuator prototype and active control test of hybrid electromagnetic suspension with hybrid electromagnetic actuator. Results showed that the designed hybrid electromagnetic actuator for the suspension systems could improve the vehicle dynamics performance. And in contrast to the passive suspension system, the body acceleration and suspension dynamic deflection of the hybrid electromagnetic suspension were decreased by 23.35% and 14.97%, respectively. Though the dynamic tire load was increased by 13.20%, it was in a reasonable range based on the principle of 3σ. And the effectiveness of the hybrid electromagnetic actuator prototype was verified. 