Nested Plant/Controller Optimization with Application to Combined Passive/Active Automotive Suspensions

Hosam K. Fathy, Panos Y. Papalambros, A. Galip Ulsoy, Davor Hrovat

Research output: Contribution to journalConference articlepeer-review

99 Scopus citations


This paper addresses the coupling between the plant and control optimization problems for a suspension comprising both passive and active components. Suspension dynamics are modeled using a two degree-of-freedom, linear and time-invariant quarter-car model whose ability to capture the influence of the passive stiffness on rattle space depends on the ground disturbance's spectral density. Nested optimization, a strategy that guarantees system optimality, is presented and used to find the optimal suspension system design. The design exhibits superior performance compared to its passive, active and sequentially optimized passive/active counterparts because it accounts for the coupling between the passive and active suspension optimization problems.

Original languageEnglish (US)
Pages (from-to)3375-3380
Number of pages6
JournalProceedings of the American Control Conference
StatePublished - 2003
Event2003 American Control Conference - Denver, CO, United States
Duration: Jun 4 2003Jun 6 2003

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering


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