Advancements in aircraft model force and attitude instrumentation by integrating statistical methods

Applying statistical methods in conjunction with instrumentation expertise has resulted in a dramatic reduction in calibration time and expense, while simultaneously improving the calibration quality. In this paper, we illustrate the application of response surface methodology and statistical quality control to two quintessential instruments used in aeronautical wind-tunnel experiments, namely, the force balance and the triaxial accelerometer. We emphasize the benefits that have been achieved by integrating the statistical design with the mechanical calibration system. For both instruments, we discuss the development of an experimental design that accommodates physicsbased constraints and highlight an innovative calibration apparatus. As a result of reduced calibration time, the frequency of calibration can be increased, which enables the monitoring of instrument stability over time. Throughout the calibration process, we emphasize efficient allocation of experimental resources to achieve the calibration requirements.

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