국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Mars Entry Atmospheric Data System Trajectory Reconstruction Algorithms and Flight Results
저자	Karlgaard, Christopher D.;; Kutty, Prasad;; Schoenenberger, Mark;; Shidner, Jeremy;; Munk, Michelle
Keyword	AERODYNAMICS;; ALGORITHMS;; ANGLE OF ATTACK;; ATMOSPHERIC ENTRY;; DATA PROCESSING;; DESCENT;; MACH NUMBER;; MARS ATMOSPHERE;; PRESSURE DISTRIBUTION;; PRESSURE SENSORS;; RELIABILITY ANALYSIS;; TRAJECTORIES;; TRAJECTORY ANALYSIS
URL	http://hdl.handle.net/2060/20130003188
보고서번호	AIAA Paper 2013-0028
발행년도	2013
출처	NTRS (NASA Technical Report Server)
ABSTRACT	The Mars Entry Atmospheric Data System is a part of the Mars Science Laboratory, Entry, Descent, and Landing Instrumentation project. These sensors are a system of seven pressure transducers linked to ports on the entry vehicle forebody to record the pressure distribution during atmospheric entry. These measured surface pressures are used to generate estimates of atmospheric quantities based on modeled surface pressure distributions. Specifically, angle of attack, angle of sideslip, dynamic pressure, Mach number, and freestream atmospheric properties are reconstructed from the measured pressures. Such data allows for the aerodynamics to become decoupled from the assumed atmospheric properties, allowing for enhanced trajectory reconstruction and performance analysis as well as an aerodynamic reconstruction, which has not been possible in past Mars entry reconstructions. This paper provides details of the data processing algorithms that are utilized for this purpose. The data processing algorithms include two approaches that have commonly been utilized in past planetary entry trajectory reconstruction, and a new approach for this application that makes use of the pressure measurements. The paper describes assessments of data quality and preprocessing, and results of the flight data reduction from atmospheric entry, which occurred on August 5th, 2012.