Virginia Tech Patents

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https://hdl.handle.net/10919/72295
These United States Patents were originally assigned to Virginia Tech.

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Browsing Virginia Tech Patents by Author "Ahmadian, Mehdi"

Now showing 1 - 3 of 3
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    Doppler sensor for the derivation of torsional slip, friction and related parameters
    (United States Patent and Trademark Office, 2012-10-23)
    An optical method and apparatus are described for the measurement of properties of a travel vehicle or a travel surface upon which the travel vehicle travels, which includes providing an incident light from a light source to the travel surface, collecting light reflected from the travel surface, determining a surface induced Doppler shift from the incident and collected light and determining at least one of a motion property of the travel vehicle and a surface property of the travel surface based on the determined surface induced Doppler shift.
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    Doppler sensor for the derivation of torsional slip, friction and related parameters
    (United States Patent and Trademark Office, 2010-04-27)
    An optical method and apparatus are described for the measurement of properties of a travel vehicle or a travel surface upon which the travel vehicle travels, which includes providing an incident light from a light source to the travel surface, collecting light reflected from the travel surface, determining a surface induced Doppler shift from the incident and collected light and determining at least one of a motion property of the travel vehicle and a surface property of the travel surface based on the determined surface induced Doppler shift.
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    No-jerk semi-active skyhook control method and apparatus
    (United States Patent and Trademark Office, 2000-09-05)
    A method of controlling a controllable force generator within a controllable suspension system interconnected between a first member M.sub.1 and a second member M.sub.2. The method includes the steps of obtaining a first signal (V.sub.abs) representative of the absolute velocity of the first member M.sub.1, obtaining a second signal (V.sub.rel) representative of the relative velocity between the first and second members, and setting a desired damping force for the generator based upon a control policy which defines a control surface. The control policy includes a preselected gain, an absolute velocity, and a shaping function of relative velocity wherein said control surface exhibits only continuous first derivatives for V.sub.rel *V.sub.abs >0 and wherein the control surface is devoid of any surface discontinuities. This control policy effectively eliminates the jerkiness in certain prior art control methods, such as skyhook.