A high-fidelity torque measurement device and method based on resonance suppression and measurement optimization

Abstract

This invention relates to a high-fidelity torque measurement device and method based on resonance suppression and measurement optimization, belonging to the field of high-precision detection technology for spacecraft, and includes a closed-loop measurement scheme in both hardware and software. The device comprises a high-precision triaxial air-bearing stage, a high-frequency torque measurement sensor system, a fiber optic inertial measurement unit, an active control actuator system, and a host computer control and data processing system. The method sequentially achieves precise locking of inertial parameters with variable weights for measurement innovations through pre-test calibration, completes wideband resonance active suppression based on inertial linkage during testing, and achieves mode-free signal purification through variational mode decomposition using multidimensional measurement optimization after testing. This invention overcomes the physical limits of traditional mechanical structures in broadening the measurement bandwidth, eliminates dynamic calibration model mismatch errors, and achieves high-fidelity and robust measurement of wideband dynamic torque, suitable for precise detection of high-frequency micro-vibration dynamic torque in spacecraft actuators.

Images