SBIR-STTR Award

Space Mechanism testing often requires precision motion control in a cryogenic and high vacuum environment. Precision position devices that can provide motion over large distances and with relatively high forces are required. DSM proposes a revolutionary piezoelectric motorized stage that is cryogenic and vacuum compatible to provide positioning and motion control for Air Force requirements in space mechanism testing. The motorized stage design represents an innovative mechanism topology that is universal in configuration such that it can be incorporated into a variety of precision instrumentation and metrology environments. Representing a novel step and repeat or walking beam motor, DSM’s design provides a number of key benefits over traditional electromagnetic driven stages. The piezoelectric motorized stage operates in cryo without any lubrication or rolling components. The technology uses very simple solid state flexure mechanisms to provide high force (600 lbf) in a relatively small cryo compatible package. With an inherently precise fit and geometry, the stage will achieve nanometer level resolution and stability. This proposal addresses DSM’s perceived approach to the development of space qualified demonstration components.

Keywords:
Piezoelectric Motor, Cryo/Vacuum Stage, Motion Control, Vacuum Compatible Motor, Mems, Semiconductor, Inspection, Test And Measurement

Arnold Engineering Development Complex (AEDC) has a wide range of test facilities used to validate aerospace technology, including chambers that simulate space environments. These simulations require accurate thermal control of large chambers at cryogenic temperature. AEDC is interested in using a new type of actuator to modulate a valve for flow control of cryogenic (~20 K) gaseous helium inside space simulation chambers. The actuator was developed by Dynamic Structures and Materials (DSM) with support from NASA; it has progressed through multiple successful prototypes and is ready for validation and insertion into relevant applications. The goal of the proposed research is to perform further development and validation of the actuator and combine it with a suitable valve so that it can be used to improve the performance of the space simulation chambers. When installed, the technology will offer many benefits, including faster chamber cycle times, reduced thermal load, better temperature control, reduced chance of faults related to vacuum deposition, and reduced operator oversight. A test program will be used to validate the system before it is used in the chambers. As part of the program, actuated valves will be delivered to AEDC for installation and use at the facility.