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TECHNICAL PAPERS

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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References

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Figures

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Simple Quarter Car (SQC) model and active suspension system
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Typical feasible region for the control parameters
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Comparison between the true transfer function (thick lines) and discrete Fourier spectrum (thin lines) for optimum suspension setting
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Optimization iteration steps
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Comparison between impulse responses of optimum and nonoptimum settings
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The effect of actuator time delay on the sprung mass acceleration
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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}
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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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