期刊
IEEE ACCESS
卷 8, 期 -, 页码 66163-66177出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2020.2985118
关键词
Actuators; Force; Mechanical products; Suspensions (mechanical systems); Electromagnetics; Prototypes; Vibrations; Automotive engineering; active suspension; PMSM ball screw actuator; varying charge voltage in steps; parameters identification; double-vibration-reduction-structure; structural design; LQG controller
资金
- National Natural Foundation of China [51575239]
- Key Research and Development Project of Jiangsu Province [BE2018105]
Aiming to develop a practical active suspension, a PMSM ball screw actuator prototype is manufactured and experimented for parameter identification. Based on identification results, a new double-vibration-reduction-structure for the featured active suspension is proposed to cope with the problem caused by the actuator's overlarge equivalent inertial mass. Unlike using a resistance to absorb output energy of the actuator, a method of varying charge voltage in steps is utilized to reclaim vibration energy into the battery pack directly. The mechanical and energy-regenerative characteristics are tested for verification of the marked parameters and identification of the unmarked parameters, especially for the Coulomb damping and the equivalent inertial mass of the actuator prototype. Besides, a high energy-regenerative efficiency and a large capability of electromagnetic control force are achieved, the overlarge equivalent inertial mass exists. To reduce the amplified demand of the active control force caused by the actuator's overlarge equivalent inertial mass directly exposed to the unsprung mass acceleration, the new double-vibration-reduction-structure (DVRS) based active suspension structure scheme suggestion with an added-vibration-reduction-structure (AVRS) between the actuator and the unsprung mass is proposed. Regulated by the corresponding LQG controller, the proposed active suspension can achieve almost the same performance of the conventional ideal active suspension.
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