Regression Analysis and Calibration Recommendations for the Characterization of Balance Temperature Effects

Ulbrich, N ; Volden, T

关键词: STRAIN GAGE BALANCES;    TEMPERATURE DEPENDENCE;    CALIBRATING;    REGRESSION ANALYSIS;    TRANSONIC WIND TUNNELS;    ITERATION;    LOADS (FORCES);    MATHEMATICAL MODELS;    DATA PROCESSING;    INDEPENDENT VARIABLES;    TEMPERATURE COMPENSATION;    WIND TUNNEL TESTS;   

RP-ID  :  ARC-E-DAA-TN53504

学科分类：航空航天科学

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

Analysis and use of temperature-dependent wind tunnel strain-gage balance calibration data are discussed in the paper. First, three different methods are presented and compared that may be used to process temperature-dependent strain-gage balance data. The first method uses an extended set of independent variables in order to process the data and predict balance loads. The second method applies an extended load iteration equation during the analysis of balance calibration data. The third method uses temperature-dependent sensitivities for the data analysis. Physical interpretations of the most important temperature-dependent regression model terms are provided that relate temperature compensation imperfections and the temperature-dependent nature of the gage factor to sets of regression model terms. Finally, balance calibration recommendations are listed so that temperature-dependent calibration data can be obtained and successfully processed using the reviewed analysis methods.