Broadband Dynamic Modification Using Feedforward Control

[+] Author and Article Information
Thomas E. Alberts

Department of Aerospace Engineering, Old Dominion University, Norfolk, VA 23529-0247

Hemanshu R. Pota

Department of Electrical Engineering, Australian Defence Force Academy, University College, University of New South Wales, Canberra ACT 2600, Australia

J. Dyn. Sys., Meas., Control 119(4), 700-706 (Dec 01, 1997) (7 pages) doi:10.1115/1.2802380 History: Received August 01, 1996; Revised June 27, 1997; Online December 03, 2007


Recently published results arising from the acoustic noise control research community, demonstrate that system dynamics can be modified using feedforward control. Initial investigations applied to known disturbances in the form of steady-state harmonic excitation. This paper further explores feedforward dynamic modification, provides a proof of the nature of the modification, extends the method to allow for broadband excitation, and introduces a design technique for arbitrary assignment of transfer function poles. The results apply to any structure representable using modal expansion, and are applicable to systems with nonminimum phase zeros.

Copyright © 1997 by The American Society of Mechanical Engineers
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