Estimation of Subsample Delays for Computer Control Systems

[+] Author and Article Information
H. Ali Pak, G. Q. Li

Department of Mechanical Engineering, University of Southern California, Los Angeles, CA 90089-1453

J. Dyn. Sys., Meas., Control 114(4), 714-717 (Dec 01, 1992) (4 pages) doi:10.1115/1.2897745 History: Received July 03, 1991; Revised February 03, 1992; Online March 17, 2008


A new method is described for estimating input time delays in linear plants. The method is based on discrete-time domain identification of such delays, and provides direct estimates in real-time. For computer control systems, the delay is allowed to be a noninteger multiple of the sampling period. Both input (actuator) delays and subsample (computational) delays can be estimated. The identification algorithm is based on a recursive Gaussian-Newton prediction error search technique. A simulation study indicating fast convergence for a second order delayed system is included.

Copyright © 1992 by The American Society of Mechanical Engineers
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