The optimal suspension structure for a simple one-degree-of-freedom vehicle model is derived using Linear-Quadratic regulator theory. In addition to rms rattlespace and acceleration, rms jerk is included in the performance index. The suspension structure contains a skyhook spring as well as the more well known skyhook damper to inertial ground and must be mechanized actively except for the shock isolation problem with no ground motion. When jerk weighting is predominant, the damping ratio ζ of the complex roots shifts from 0.707 to 0.5. Charts are presented which enable preliminary design calculations to be done graphically. Using frequency response and time response techniques, performance is compared to that of optimal suspensions disregarding jerk.
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September 1981
Research Papers
Optimum Vehicle Suspensions Minimizing RMS Rattlespace, Sprung-Mass Acceleration and Jerk
D. Hrovat,
D. Hrovat
Scientific Research Laboratory, Ford Motor Company, Dearborn, Mich. 48121
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M. Hubbard
M. Hubbard
Department of Mechanical Engineering, University of California, Davis, Calif. 95616
Search for other works by this author on:
D. Hrovat
Scientific Research Laboratory, Ford Motor Company, Dearborn, Mich. 48121
M. Hubbard
Department of Mechanical Engineering, University of California, Davis, Calif. 95616
J. Dyn. Sys., Meas., Control. Sep 1981, 103(3): 228-236 (9 pages)
Published Online: September 1, 1981
Article history
Received:
July 23, 1980
Online:
July 21, 2009
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Citation
Hrovat, D., and Hubbard, M. (September 1, 1981). "Optimum Vehicle Suspensions Minimizing RMS Rattlespace, Sprung-Mass Acceleration and Jerk." ASME. J. Dyn. Sys., Meas., Control. September 1981; 103(3): 228–236. https://doi.org/10.1115/1.3140633
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