A novel nonlinear road profile classification approach for controllable suspension system: Simulation and experimental validation

Yechen Qin, Chongfeng Wei, Xiaolin Tang*, Nong Zhang, Mingming Dong, Chuan Hu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)


Driven by the increasing requirement for road conditions in the field of the controllable suspension system, this paper presents a novel nonlinear road-excitation classification procedure for arbitrary suspension control strategy. The proposed procedure includes four steps: the definition of controller parameters, selection of insensitive frequency ranges, calculation of superior features, and generation of the classifier. To better illustrate the proposed procedure, the clipped optimal control strategy is taken as an example in the simulation part. Simulation results reveal that the proposed method can accurately estimate road excitation level for various controller parameters, vehicle speeds, and vehicle models. Three contributions have been made in this paper: (1) A road classification procedure that can be used for road adaptive suspension control with any control algorithm is developed; (2) In order to improve classification accuracy, the concept of insensitive index which is based on the time-frequency analysis is proposed; (3) Experimental validation with a quarter vehicle test rig is performed, which has verified the effectiveness of the proposed method for the adaptive controllable suspension system.

Original languageEnglish
Pages (from-to)79-98
Number of pages20
JournalMechanical Systems and Signal Processing
Early online date21 Jul 2018
Publication statusPublished - 15 Jun 2019
Externally publishedYes

Bibliographical note

Funding Information:
This research is supported by National Natural Science Foundation of China ( 51705044 ), Beijing Natural Science Foundation ( 3184058 ).

Publisher Copyright:
© 2018 Elsevier Ltd

Copyright 2019 Elsevier B.V., All rights reserved.


  • Controllable suspension system
  • Nonlinear suspension system
  • Road classification
  • Time-frequency analysis

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Signal Processing
  • Civil and Structural Engineering
  • Aerospace Engineering
  • Mechanical Engineering
  • Computer Science Applications


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