국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Noncontacting Laser Inspection System for Dimensional Profiling of Space Application Thermal Barriers
저자	Taylor, Shawn C.
Keyword	DAMAGE;; ELASTIC PROPERTIES;; EXPERIMENT DESIGN;; HIGH TEMPERATURE GASES;; LASERS;; LOADS (FORCES); PANELS;; THERMAL PROTECTION;; VARIABILITY
URL	http://hdl.handle.net/2060/20110008239
보고서번호	NASA/CR-2011-216803
발행년도	2011
출처	NTRS (NASA Technical Report Server)
ABSTRACT	A noncontacting, two-dimensional ƒ-D) laser inspection system has been designed and implemented to dimensionally profile thermal barriers being developed for space vehicle applications. In a vehicle as-installed state, thermal barriers are commonly compressed between load sensitive thermal protection system (TPS) panels to prevent hot gas ingestion through the panel interface during flight. Loads required to compress the thermal barriers are functions of their construction, as well as their dimensional characteristics relative to the gaps in which they are installed. Excessive loads during a mission could damage surrounding TPS panels and have catastrophic consequences. As such, accurate dimensional profiling of thermal barriers prior to use is important. Due to the compliant nature of the thermal barriers, traditional contact measurement techniques (e.g., calipers and micrometers) are subjective and introduce significant error and variability into collected dimensional data. Implementation of a laser inspection system significantly enhanced the method by which thermal barriers are dimensionally profiled, and improved the accuracy and repeatability of collected data. A statistical design of experiments study comparing laser inspection and manual caliper measurement techniques verified these findings.