22 June 2000 Design and performance of a resonant roller wedge actuator
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Abstract
A compact rotary motor driven by piezoelectric bimorph actuators was developed for applications in adaptive, conformable structures for flow control. Using a roller wedge (rotary roller clutch) as its central motion rectifying element, the actuator converts electrical power to mechanical power by way of a set of resonating bimorph/mass systems. With this type of resonant drive system, the output mechanical power of the actuator was dramatically improved over previous inchworm-type designs. Also, the actuator cost was kept low by using commercial roller clutches and bimorph actuators instead of PZT stacks. Within an application size constraint of 4 x 4 x 1.75 inches, the unloaded speed was 600 RPM, the stall torque was 0.5 N-m, and the peak output power was nearly 4 watts. The motor is driven by a single frequency sinusoidal input, resulting in significant improvements of the cost, size and complexity over typical piezoelectric actuator drivers. Since the backlash of the roller clutch is a critical parameter in assessing the motor performance, an experimental study was performed to better understand its dynamics.
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Jeremy Eli Frank, Jeremy Eli Frank, Gary H. Koopmann, Gary H. Koopmann, Weicheng Chen, Weicheng Chen, Eric Michael Mockensturm, Eric Michael Mockensturm, George Andre Lesieutre, George Andre Lesieutre, } "Design and performance of a resonant roller wedge actuator", Proc. SPIE 3985, Smart Structures and Materials 2000: Smart Structures and Integrated Systems, (22 June 2000); doi: 10.1117/12.388824; https://doi.org/10.1117/12.388824
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