LOAD SYNTHESIS OF HELICOPTER DYNAMIC COMPONENTS: IMPROVEMENTS TO LINEAR REGRESSION IN THE AZIMUTH DOMAIN

摘要

This paper reports improvements to the accuracy and practicality of an approach using linear regression in the azimuth domain to synthesize loads on helicopter dynamic components. Major improvements result from the addition of flight parameters as predictor variables, and the ability to perform concurrent regression at multiple azimuth locations. Their effectiveness is demonstrated by improvements in the predictive accuracy and model parsimony of load synthesis models developed for 160 representative level flight runs selected from a Black Hawk helicopter strain survey.