Land vehicles – Wheeled – Running gear
Patent
1993-03-08
1995-02-21
Culbreth, Eric D.
Land vehicles
Wheeled
Running gear
267162, 267228, 280701, 310316, B60G 1100
Patent
active
053909496
ABSTRACT:
A lightweight, high performance, active suspension system utilizing piezoelectric regulated springs, and a method of manufacturing the suspension system, is described. Piezoelectric material is bonded to suspension springs, and excited appropriately to vary the stiffness of the suspension system. A method of controlling the stiffness of a spring includes piezoelectric material bonded to the spring, a sensor system for generating a signal proportional to the loading imposed on the spring, and controller for exciting the piezoelectric material in response to the signal. A control system for controlling the stiffness of a spring including embedding a plurality of piezoelectric particles within an electrically conductive matrix forming the body of the spring is also described.
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patent: 5013955 (1991-05-01), Hara et al.
patent: 5105918 (1992-04-01), Hagiwara et al.
Naganathan Ganapathy
Thirupathi Sridhar R.
Culbreth Eric D.
The University of Toledo
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