A high-precision fatigue experiment calibration method and related equipment

Abstract

The application relates to the technical field of fatigue experiment precision calibration, in particular to a high-precision fatigue experiment calibration method and related equipment. The method comprises the following steps: constructing an experimental structure response measurement system through a set of multi-point strain sensing array to obtain a structure sensitivity matrix; inversely calculating the real load of the structure through the structure sensitivity matrix to obtain six components of the real load at the structure end; calibrating the relationship between actuators and the structure through the six components of the real load at the structure end to obtain an actuator-structure mapping matrix; decoupling and controlling and distributing the actions of multiple actuators through the actuator-structure mapping matrix to obtain six components required to be input by each actuator; and synchronously correcting the dynamic loading phase according to the six components required to be input by each actuator and the six components of the real load at the structure end to obtain a high-precision dynamic load control signal. The method can eliminate errors such as loading path flexibility and coupling interference, and ensure the load independence and dynamic synchronism.

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