Stochastic optimal control of truck cabin with active suspension


AKÇAY H., TÜRKAY S.

INTERNATIONAL JOURNAL OF HEAVY VEHICLE SYSTEMS, vol.21, no.3, pp.183-207, 2014 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 21 Issue: 3
  • Publication Date: 2014
  • Doi Number: 10.1504/ijhvs.2014.066067
  • Journal Name: INTERNATIONAL JOURNAL OF HEAVY VEHICLE SYSTEMS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.183-207
  • Keywords: truck cabin, active suspension, random vibration, linear-quadratic-Gaussian, HIFOO control, heavy vehicle, H-INFINITY CONTROL, FLEXIBLE BODIES, DESIGN, VEHICLES
  • Anadolu University Affiliated: Yes

Abstract

In this paper, a three-degree-of-freedom cabin model for a commercial truck is derived to study ride motions of the cabin under random road excitations. First, an active suspension system is designed using the linear-Nquadratic-Gaussian (LQG) design methodology. Then, the LQG design is reduced by the method of balanced truncation. The simulation results show that both the LQG design and the truncated controller effectively suppress the cabin vibrations induced by road unevenness. Next, the control design problem is re-formulated as a non-convex and non-smooth optimisation problem with fixed-order controllers and solved by the recently developed H-infinity fixed-order optimisation (HIFOO) toolbox.