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Experimental Study on an Electric Variable Valve Timing Actuator: LPV Modeling and Control

[+] Author and Article Information
Ali Khudhair Al-jiboory

Mechanical Engineering Michigan State University East Lansing, Michigan 48824
aljiboor@egr.msu.edu

Guoming George Zhu

Mechanical Engineering Michigan State University East Lansing, Michigan 48824
zhug@egr.msu.edu

Shupeng Zhang

Mechanical Engineering Michigan State University East Lansing, Michigan 48824
zhang@egr.msu.edu

1Corresponding author.

ASME doi:10.1115/1.4036539 History: Received May 14, 2016; Revised March 10, 2017

Abstract

This paper presents experimental investigation results of an Electric Variable Valve Timing (EVVT) actuator using Linear Parameter Varying (LPV) system identification and control. For the LPV system identification, a number of local system identification tests were carried out to obtain a family of Linear Time-Invariant (LTI) models at fixed engine speed and battery voltage. Using engine speed and battery voltage as time-varying scheduling parameters, the family of local LTI models are translated into a single LPV model. Then, a Robust Gain-Scheduling (RGS) dynamic output-feedback controller with guaranteed H_infinity performance was synthesized and validated experimentally based on the identified LPV model. In contrast to the vast majority of gain-scheduling literature, scheduling parameters are assumed to be polluted by measurement noises and the engine speed and battery voltage are modeled as noisy scheduling parameters. Experimental and simulation results show the effectiveness of the developed approach.

Copyright (c) 2017 by ASME
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