Development of electronic actuation system for shape-memory-alloy-based aerospace structures

Shankar, V and Dayananda, GN and Kumar, Senthil P and Subba Rao, M and Balasubramaniam, R (2002) Development of electronic actuation system for shape-memory-alloy-based aerospace structures. In: Conference on Smart Materials, Structures and Systems, 12-14 Dec 2002, Bangalore, India.

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Abstract

Shape memory alloy (SMA) is being widely used to implement smart concepts such as shape control and vibration suppression of aerospace structures. Shape memory alloy wires while undergoing phase transformation from martensite state to austenite state produce large strains. While doing so they serve as actuators and generate large forces when constrained while recovering their pre-defined shape, imparting this force to the structural component on which they are mounted which results in its movement. While designing the electronic system to energize an aerospace structure with shape memory alloy based actuators the amount of current and time for which this current is passed through the shape memory alloy wire are important considerations. It is equally important to design very efficient and miniature power sources (constant voltage as well as constant current) and control system to achieve fine and steady positioning of the structural component. This paper discusses different issues involved, as well as design and development of the electronics and control system for actuating and controlling a typical aerospace structural component with SMA actuators.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Aircraft structures;Actuator design;Shape memory alloys; Phase transformations;Smart structures;Shape control; Vibration damping;Circuit design;Wire;Austenite;Martensitic transformation;Electric power supplies
Subjects: ENGINEERING > Electronics and Electrical Engineering
Division/Department: Structures Division, Structures Division, Structures Division, Advanced Composites Division, Structures Division
Depositing User: Mr. Ravikumar R
Date Deposited: 08 Sep 2006
Last Modified: 24 May 2010 09:50
URI: http://nal-ir.nal.res.in/id/eprint/2665

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