Active suspension control by output feedback through extended high-gain observers. (18th August 2019)

• Record Type: Journal Article
• Authors: Bai, Xue-Ling; Lei, Jing
• Is Part Of: Ferroelectrics. Volume 548(2019)
• Page Start: 185
• Page End: 200
• Publication Date: 2019-08-18
• Subjects: Nonlinear systems -- regional input-to-state stability (RISS) -- output feedback control -- extended high-gain observers -- quarter-car suspensions; Ferroelectricity -- Periodicals; Ferroelectric crystals -- Periodicals; 537
• DOI: 10.1080/00150193.2019.1592525
• Languages: English
• ISSNs: 0015-0193

Abstract

Abstract: The paper addresses extended high-gain observer (EHGO) design for a vehicle suspension system. The different way from previous reports is that a regional input-to-state stabilization (including exponential stabilization) controller is presented. To pursue this aim, first the original suspension dynamical equation is transformed into a normal form. And then, a feedback linearization controller is designed as the state feedback control, which makes the closed-loop system regionally input-to-state stable. Based on this, the output feedback control by using EHGO is proposed. The stability of the singular perturbation system composed by the state closed-loop system and the scaled error equation is demonstrated. Simulation examples are illustrated, which validate that provided small high-gain parameter ε, the output feedback control will recover the performance of RISS under state feedback control and the responses of suspension performance behave better than those under the later.