Contribution Separation Technique by Operational TPA using Multiple Measuring Systems

Abstract

Operational TPA was developed to obtain contributions with small man-hour. In the method, all reference and response signals are necessary to be measured at exactly same timing by single measurement system. However, this occasionally requires large measurement system depending on the products and may decrease the applicability of the method. In this study, we propose a method for obtaining high contributing part (reference point) to the response point at the operational condition by OTPA using several measurement systems. In the proposed method, the measurement timing gap among measurement systems is estimated using the estimation error of OTPA between calculated and measured response signals. As a verification of the proposed method, we applied this procedure to a simple vehicle model and compared the obtained contribution with the contributions by OTPA using single measurement system. As the result, the contribution of the proposed method was verified to have an ability to obtain the correct contribution by several measurement systems.