Optimum Active Vehicle Suspensions With Actuator Time Delay

[+] Author and Article Information
Nader Jalili

Department of Mechanical Engineering, Clemson University, Clemson, SC 29634-0921e-mail: jalili@clemson.edu

Ebrahim Esmailzadeh

Department of Mechanical Engineering, University of Victoria, Victoria, BC V8W 3P6 Canada

J. Dyn. Sys., Meas., Control 123(1), 54-61 (Aug 04, 2000) (8 pages) doi:10.1115/1.1345530 History: Received August 04, 2000
Copyright © 2001 by ASME
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Grahic Jump Location
Simple Quarter Car (SQC) model and active suspension system
Grahic Jump Location
Typical feasible region for the control parameters
Grahic Jump Location
Comparison between the true transfer function (thick lines) and discrete Fourier spectrum (thin lines) for optimum suspension setting
Grahic Jump Location
Optimization iteration steps
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Comparison between impulse responses of optimum and nonoptimum settings
Grahic Jump Location
The effect of actuator time delay on the sprung mass acceleration
Grahic Jump Location
The Michailov plot of the characteristic equation (13) as ω∊{−∞,+∞} varies for optimum feedback gains k={151.47,68.86,4738,1000}. (a) Stable, τ=0.005 and (b) unstable, τ=0.025 s.
Grahic Jump Location
Comparison between two different time delay settings of τ=0.005 s (thick lines) and τ=0.025 s (thin lines), for feedback gain k={151.47,68.86,4738,10,000}
Grahic Jump Location
Two different feedback gain settings. thin lines for k={151.47,68.86,4738,10,000} (optimum to τ=0.005 s), and thick lines for k={−1000,5708.9,8215.2,8531.5} (optimum to τ=0.025 s)  



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