국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Advanced Stirling Convertor Durability Testing: Plans and Interim Results
저자	Meer, David W.;; Oriti, Salvatore M.
Keyword	DURABILITY;; DYNAMIC RESPONSE;; DYNAMIC STRUCTURAL ANALYSIS;; ELECTROMAGNETIC COMPATIBILITY;; ELECTROMAGNETIC INTERFERENCE;; RANDOM VIBRATION;; SIMULATION;; SPACE MISSIONS;; STIRLING CYCLE
URL	http://hdl.handle.net/2060/20120016509
보고서번호	NASA/TM-2012-217727
발행년도	2012
출처	NTRS (NASA Technical Report Server)
ABSTRACT	The U.S. Department of Energy (DOE), Lockheed Martin Corporation (LM), and NASA Glenn Research Center (GRC) have been developing the Advanced Stirling Radioisotope Generator (ASRG) for use as a power system for space science missions. In support of this program, GRC has been involved in testing Stirling convertors, including the Advanced Stirling Convertor (ASC), for use in the ASRG. This testing includes electromagnetic interference/compatibility (EMI/EMC), structural dynamics, advanced materials, organics, and unattended extended operation. The purpose of the durability tests is to experimentally demonstrate the margins in the ASC design. Due to the high value of the hardware, previous ASC tests focused on establishing baseline performance of the convertors within the nominal operating conditions. The durability tests present the first planned extension of the operating conditions into regions beyond those intended to meet the product spec, where the possibility exists of lateral contact, overstroke, or over-temperature events. These tests are not intended to cause damage that would shorten the life of the convertors, so they can transition into extended operation at the conclusion of the tests. This paper describes the four tests included in the durability test sequence: 1) start/stop cycling, 2) exposure to constant acceleration in the lateral and axial directions, 3) random vibration at increased piston amplitude to induce contact events, and 4) overstroke testing to simulate potential failures during processing or during the mission life where contact events could occur. The paper also summarizes the analysis and simulation used to predict the results of each of these tests.