Control method and apparatus

Details Control method and apparatus Control method and apparatus

2006-11-14

2006-11-14

Williams, Hezron (Department: 2856)

Measuring and testing

Vibration

Vibrator

C073S808000

Reexamination Certificate

active

07134344

ABSTRACT:
An adaptive control method is provided with particular relevance in methods which use a varying input frequency for analysis of an oscillatory response of a system, such as sine sweep testing. In one aspect the method includes the steps of applying a drive force having at least one sinusoidal component to said system, the frequency of the sinusoidal component being changed with time; and measuring an oscillatory response of said system; the method further including the step of providing a control signal based on at least a comparison between the frequencies of the sinusoidal component and the oscillatory response, wherein the rate at which the frequency of the sinusoidal component is changed is adjusted according to the control signal, so as to adapt the rate of frequency change to the region of the response spectrum being analyzed. A test apparatus capable of carrying out the methods of the invention is also provided.

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patent: 5299459 (1994-04-01), Underwood
patent: 5847259 (1998-12-01), Hu
patent: 6023975 (2000-02-01), Willis
patent: 2004/0262925 (2004-12-01), Seki et al.
patent: 5802490415 (1983-02-01), None

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