Boots – shoes – and leggings
Patent
1995-02-27
1996-05-14
Voeltz, Emanuel T.
Boots, shoes, and leggings
3642211, 364553, G01M 700
Patent
active
055174264
ABSTRACT:
An apparatus and method for adaptively updating the drive signal in a shock testing system so as to produce a desired response signal. The updates to the drive signal are based on measurements of the system's actual response signal and closed loop updates to the test system's transfer function. An initial estimate of the test system transfer function is obtained by using a calibration signal as the drive signal and measuring the response signal. An initial estimate of the actual drive signal is then obtained based on the desired response signal and the initial estimate of the transfer function. The initial estimate of the drive signal is then applied to the test system, and the actual response signal is measured. The present invention then adaptively updates the test system transfer function. The updated transfer function is then used with the drive signal and response signals to determine a coherence function which provides an estimate of the convergence of the estimate of the transfer function to the actual transfer function for the test system. The previous estimate for the drive signal and the current estimates for the transfer function and coherence function are then used to determine an updated drive signal. This sequence is repeated until the drive signal is produces a response signal which is acceptably close to the desired response signal.
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Miller Craig Steven
Voeltz Emanuel T.
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