Accession Number : ADP009082

Title :   Sensing and Actuation Arrays for Structural Control.

Corporate Author : VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG BRADLEY DEPT OF ELECTRICA L ENGINEERING

Personal Author(s) : Lindner, Douglas K.

Report Date : SEP 1993

Pagination or Media Count : 19

Abstract : In this paper we consider vibration suppression in flexible structures using active control. The design of active control systems for structures has been a topic of investigation for more than a decade. One of the common threads linking previous research in this area is the assumption that the control system will have relatively few sensors and actuators. This assumption was necessary, considering the actuation and sensing technology available in the past. The last decade, however, has seen the development of the next generation of actuators and sensors. This instrumentation consists of low power, miniaturized devices that can be incorporated directly into the material of the structure. Coupled with advancements in digital electronics, we can imagine dense arrays of sensors and actuators for structural control. In this paper we investigate the possible impact these arrays would have on control system design. In particular we note that these arrays provide a direct spatial measurement of the structure. We present a framework that takes into account this novel capability of the actuator/sensor arrays. Application to the active suppression of acoustic radiation is discussed.

Descriptors :   *CONTROL SYSTEMS, *VIBRATION ISOLATORS, *DAMPING, ACOUSTICS, ACTUATION, ACTUATORS, ARRAYS, CONTROL, ELECTRONICS, FLEXIBLE STRUCTURES, INSTRUMENTATION, LOW POWER, MEASUREMENT, RADIATION, SUPPRESSION, VIBRATION.

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE