Title :
Response surface methods for force balance calibration modeling
Author :
Parker, Philip A.
Author_Institution :
NASA Langley Res. Center, Hampton, VA
fDate :
8/1/2001 12:00:00 AM
Abstract :
A "modern design of experiments" (MDOE) approach to balance calibration at NASA Langley Research Center focuses on the application of formal experimental design techniques to address weaknesses in the current calibration methodologies. The Single-Vector Balance Calibration System (SVS) has been developed as an innovative mechanical load application system specifically designed for the efficient and accurate execution of a formal experimental design. This paper emphasizes practical applications of response surface methodology with the analyses of experimental data. Calibration experimental design concepts including the estimation of the required data volume and an evaluation of the model prediction capability are presented. Randomization, replication, and blocking are proposed as means of tactical defense against systematic errors present in all calibration systems. Response surface methods are implemented in obtaining an adequate model with the minimum number of terms and partitioning of the unexplained variance. A systematic approach to augmenting a second order model with higher order terms is discussed. Applying formal experimental design techniques to force balance calibration provides a suite of sophisticated and elegant tools that advance balance calibration technology
Keywords :
calibration; design of experiments; force measurement; mean square error methods; measurement errors; modelling; polynomial approximation; strain gauges; wind tunnels; ANOVA; Taylor series expansion; aerodynamic loads; blocking; defense against systematic errors; force balance calibration modeling; force measurement; higher order terms; mechanical load application system; model prediction capability; modern design of experiments; moment measurement; one-factor-at-a-time methodology; polynomial equation; randomization; replication; required data volume; response surface methodology; second order model; single-vector balance calibration system; unexplained variance partitioning; wind tunnel testing; Aerodynamics; Calibration; Design for experiments; Force measurement; Mathematical model; NASA; Polynomials; Response surface methodology; Strain measurement; Testing;
Conference_Titel :
Instrumentation in Aerospace Simulation Facilities, 2001. 19th International Congress on ICIASF 2001
Conference_Location :
Cleveland, OH
Print_ISBN :
0-7803-7022-8
DOI :
10.1109/ICIASF.2001.960262
