Land vehicles – Wheeled – Running gear
Patent
1990-11-16
1991-11-05
Marmor, Charles A.
Land vehicles
Wheeled
Running gear
36442405, B60G 1708
Patent
active
050626574
ABSTRACT:
A controlled suspension for a wheeled vehicle includes a damper between the vehicle body and wheel, the damper being switchable, at a frequency sufficient for the control of resonant wheel vibrations, between a first mode of operation characterized by a high damping force and a second mode of operation having a low damping force. A control repeatedly derives from sensed vehicle suspension related operating variables desired force to be applied between the body and wheel in order to produce a desired suspension behavior determines whether that force result in active or dissipative suspension power. The control further stores a threshold and controls the damper for each derivation so that (1) the damper operates in its second mode of operation when the desired force would produce active power, (2) the damper operates in its first mode of operation when the desired force exceeds the threshold and would produce dissipative power, and (3) the damper operates in its second mode of operation when the desired force is less than the threshold and would produce dissipative power.
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Karnopp, Crosby and Harwood, "Vibration Control Using Semi-Active Force Generators", ASME Paper No. 73-DET-122, Jun. 1974.
Karnopp, "Active Damping in Road Vehicle Suspension Systems", Vehicle System Dynamics, vol. 12, pp. 291-311, 1983.
Crosby and Karnopp, "The Active Damper-A New Concept for Shock and Vibration Control", 43rd Shock and Vibration Bulletin, Shock and Vibration Information Center, Naval Research Laboratory, Washington, D.C., 1973, pp. 119-133.
Krasnicki, "Comparison of Analytic and Experimental Results for a Semi-Active Vibration Isolator", Proceedings of the 50th Shock and Vibration Symposium, Oct. 1979, pp. 69-76.
Margolis, "Semi-Active Control of Wheelhop in Ground Vehicles", Vehicle System Dynamics, vol. 12, pp. 317-330, 1983.
Physics for Students of Science and Engineering, Halliday and Resnick, John Wiley & Sons, 1960, 1962, pp. 121-122.
Finlay Tamara L.
General Motors Corporation
Marmor Charles A.
Sigler Robert M.
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