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Automotive Engineering ›› 2025, Vol. 47 ›› Issue (7): 1404-1414.doi: 10.19562/j.chinasae.qcgc.2025.07.017

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Parallel Variable Geometry Suspension Design for Distributed Drive Electric Chassis with Corner Module Architecture

Zhenhai Gao,Hanying Zhang,Zongzhi Han()   

  1. Jilin University,National Key Laboratory of Automobile Chassis Integration and Bionics,Changchun 130022
  • Received:2024-11-07 Revised:2024-12-19 Online:2025-07-25 Published:2025-07-18
  • Contact: Zongzhi Han E-mail:179627492@qq.com

Abstract:

Distributed drive electric vehicles, characterized by multiple controllable DOFs and compact chassis structure, is an optimal platform for implementing advanced drive-by-wire chassis. For demand for extended motion functions and modular design of distributed drive electric chassis, a variable geometry suspension design method is proposed. By analyzing the chassis motion functions, the suspension design issue is transformed into a 2R1T parallel mechanism type synthesis problem. The concepts of subgroups and submanifolds are employed to establish a mapping relationship between the motion functions of the suspension linkages and their topological structures. Considering the constraint characteristics, pose capabilities, modularity, reconfigurability, and input-output motion decoupling of the mechanism, the topological structure optimization of the suspension is accomplished. Finally, a comparative performance analysis is carried out in terms of mechanism kinematics and vehicle dynamics. The results show that the suspension system based on parallel mechanism provides smooth and uninterrupted motion, without singular configurations within the posture workspace, demonstrating superior transmission efficiency and dexterity. The kinematic performance and ride comfort of the suspension system are significantly improved compared to those based on conventional configurations.

Key words: distributed drive electric chassis, wheel corner module, variable geometry suspension, parallel mechanism