Design of Silent, Miniature, High Torque Actuators
Design of Silent, Miniature, High Torque Actuators by John Henry Heyer III Bachelor of Science in Mechanical Engineering University of Rochester, 1995 SUBMITTED TO THE DEPARTMENT OF MECHANICAL ENGINEERING IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE IN MECHANICAL ENGINEERING AT THE MASSACHUSETTS INSTITUTE OF TECHNOLOGY MAY 1999 © 1999 Massachusetts Institute of Technology. All Rights Reserved. A uth o r ............................................... , ,.,v .... ... ............ De~p~9nIf Mechanic ygineering / ~May 7,1999 Certified by ............. Woodie C. Flowers Pappalardo Professor of Mechanical Engineering The supervisor C ertified by ...................................... ................ ....... David R. Wallace Ester and Harold Edgerton Assistant Professor of Mechanical Engineering .,- )Thesis Supervisor A ccepted by .............................................. .. ........................ Ain A. Sonin Professor of Mechanical Engineering Chairman, Department Committee for Graduate Students MASSACHUSETTS INSTITUTE MASSACHUSETTS INSTITUTE OF TECHNOLOGY OF TECHNOLOGY LIRLIBRARIES E 1LIBRARIES Design of Silent, Miniature, High Torque Actuators by John Henry Heyer III Submitted to the Department of Mechanical Engineering on May 7, 1999 in partial fulfillment of the requirements for the degree of Master of Science in Mechanical Engineering Abstract Specifications are given for an actuator for tubular home and office products. A survey of silent, miniature, low cost, low-speed-high-torque actuators and transmissions is performed. Three prototype actuators, including an in-line spur gear actuator, a differential cycloidal cam actuator, and a novel actuator concept, all driven by direct current motors, are designed, built, and tested. A fourth actuator, an ultrasonic motor, is purchased off-the-shelf and tested. The prototypes are ranked according to noise, torque, efficiency, and estimated cost, among other criteria. Thesis Supervisor: Woodie C.
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