Development, Design and Construction of Actuator Demonstration Devices that Operate with Magnetic Shape Memory Alloys


  1. KarisAllen, K.J.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN);Facts Engineering Inc, Halifax NS (CAN)
Three prototype devices which demonstrate potential applications of magnetic shape memory (MSM) alloys were designed and constructed during this study. The devices included a flow effector micro-actuator for influencing the aerodynamic boundary layer of a propelled projectile, an active vibration damping device for reducing the amplitude and energy associated with mechanical vibration, and an energy harvesting device for converting mechanical energy into electrical energy. Three MSM micro-actuators were designed and incorporated into a simulated nose-cone insert. The actuators were positioned at 120 degree intervals around the circumference of an approximately 75mm diameter ring (the simulated cross section of a nose-cone). Dynamic performance testing of the micro-actuators indicated that peak to peak linear deflections of approximately 0.64mm (which represented approximately 3.3 percent recoverable strain) were generated by the device. An active vibration damping device was designed and constructed with a linear load train arrangement. The arrangement facilitated the evaluation of the damping capabilities of a MSM actuator included in the load train. Dynamic impact deflection impact transients were imposed on the load train and were subsequently dampened using feedback and feed-forward control algorithms. Utilizing the feedback control algorithm, the results indicated a reduction of approximately 66 percent for both peak deflection amplitude and waveform energy. Utilizing th

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Report Number
DRDC-ATLANTIC-CR-2005-119 — Contractor Report
Date of publication
01 May 2006
Number of Pages

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