Piezo Actuator for an EOD Manipulator Arm
Small Business Information
460 West 34th Street, New York, NY, 10001
AbstractHoneybee Robotics proposes to develop an ultrasonic actuator using high performance single crystal relaxor piezoelectric materials. These new materials, with strains exceeding 1% and electromechanical coupling exceeding 90%, allow for higher output torques and better efficiencies than possible with previous piezo materials. While traditional ultrasonic actuators are commonly used for micro-positioning applications, we seek to demonstrate that the improvement in the performance capabilities of ultrasonic actuators will enable their use in applications where greater torque, precision control, and demanding volume/weight constraints require novel actuators. The proposed innovation, based on a patent held by Honeybee Robotics, departs from conventional designs for ultrasonic actuators and changes the basic geometry by generating traveling waves on a stator surface. In this manner, a combination of the single crystal relaxor ceramics and amplification by the geometric design of the stator would achieved improved performance of the actuator. Our proposed solution provides a compact actuator with a high torque/volume ratio, fail-safe braking, no required lubrication, and no electromagnetic interference. It will have low mass and few mechanical parts in a simple geometric arrangement. The actuator proposed will also demonstrate benefits with respect to reliability, safety and cost-effectiveness.
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