A STUDY ON THE SENSOR PLACEMENT TO IDENTIFY MULTIPLE INPUT FORCES USING ORTHOGONALITY OF FREQUENCY RESPONSE MATRIX

다중 입력 규명을 위한 센서의 위치 선정에 관한 연구 ; 주파수 응답 행렬의 직교성 응용

A study to determine a proper sensor placement was developed to improve force identification. Improper selection of response position cause erroneous result in force identification problem. This paper presents two methods to improve the conditioning of the system's FRM(Frequency Response Matrix) which affects the accuracy of result. The basic strategy of the two methods in selecting the response position is to let the smallest singular value be as large as possible by maximizing the orthogonality of FRM. The suggested methods are tested numerically with a fixed-fixed beam model. The test results show that the proposed methods are very effective in dealing with the force identification problem.