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Title: Unitaxial constant velocity microactuator

A uniaxial drive system or microactuator capable of operating in an ultra-high vacuum environment. The mechanism includes a flexible coupling having a bore therethrough, and two clamp/pusher assemblies mounted in axial ends of the coupling. The clamp/pusher assemblies are energized by voltage-operated piezoelectrics therewithin to operatively engage the shaft and coupling causing the shaft to move along its rotational axis through the bore. The microactuator is capable of repeatably positioning to sub-manometer accuracy while affording a scan range in excess of 5 centimeters. Moreover, the microactuator generates smooth, constant velocity motion profiles while producing a drive thrust of greater than 10 pounds. The system is remotely controlled and piezoelectrically driven, hence minimal thermal loading, vibrational excitation, or outgassing is introduced to the operating environment.
Inventors:
 [1]
  1. (Knoxville, TN)
Issue Date:
OSTI Identifier:
869343
Assignee:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN) ORNL
Patent Number(s):
US 5319257
Contract Number:
AI05-81OR20806
Research Org:
NATIONAL INST OF STNDS & TECH
Country of Publication:
United States
Language:
English
Subject:
unitaxial; constant; velocity; microactuator; uniaxial; drive; capable; operating; ultra-high; vacuum; environment; mechanism; flexible; coupling; bore; therethrough; clamp; pusher; assemblies; mounted; axial; energized; voltage-operated; piezoelectrics; therewithin; operatively; engage; shaft; causing; move; rotational; axis; repeatably; positioning; sub-manometer; accuracy; affording; scan; range; excess; centimeters; moreover; generates; smooth; motion; profiles; producing; thrust; 10; pounds; remotely; controlled; piezoelectrically; driven; hence; minimal; thermal; loading; vibrational; excitation; outgassing; introduced; rotational axis; operating environment; bore therethrough; remotely controlled; vacuum environment; ultra-high vacuum; minimal thermal; thermal loading; thermal load; constant velocity; flexible coupling; remotely control; electrically driven; /310/