A vibration modal test device and method for a power isolating switch

Abstract

The present application relates to the technical field of structural dynamics, in particular to a vibration mode test device and method of power disconnecting switch. It includes an excitation unit generating controllable sweep, random and pulse excitation signals, and adjusting the excitation energy distribution through dynamic frequency domain optimization algorithm; a sensing unit synchronously collecting vibration acceleration, strain and acoustic emission signals based on multi-physical field sensor array, and ensuring data consistency through anti-aliasing synchronous acquisition technology; a collection and analysis unit extracting dense modal parameters based on multi-scale modal decomposition module combined with improved variational modal decomposition and wavelet packet transform; a control optimization unit dynamically adjusting test parameters based on real-time modal tracking module, and balancing excitation intensity and specimen safety boundary through multi-objective particle swarm optimization algorithm. Synchronously collect acceleration, strain and acoustic emission signals of structure vibration, and ensure time consistency and frequency integrity of multiple data.

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