| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibration testing machine capable of obtaining a transfer function matrix without applying load such as bending stress to a test piece, and to provide a method for obtaining the transfer function matrix.SOLUTION: A vibration testing machine T includes: a plurality of vibration parts S1 and S2 for inputting vibration to a test piece TP; a plurality of actuators Ac1, Ac2, Ac3, and Ac4 for driving the vibration parts S1 and S2; and a plurality of sensors Xd1, Xd2, Xd3, and Xd4 for detecting at least one of displacement, speed, and acceleration along the driving direction of respective actuators Ac1, Ac2, Ac3, and Ac4. The actuators Ac1, Ac2, Ac3, and Ac4 capable of driving the respective vibration parts S1 and S2 in the same direction are defined as a group. A transfer function matrix is obtained based on outputs of the respective sensors Xd1, Xd2, Xd3, and Xd4 when a noise signal that is applied to the respective actuator groups and synchronously drives the respective vibration parts in the same direction, is applied to the respective actuators Ac1, Ac2, Ac3, and Ac4. |
