Tiltrotor eVTOL distributed health monitoring method and system

Abstract

This invention discloses a distributed health monitoring method and system for tiltrotor eVTOL. The method includes: S1: Reading multiple bus data packets from heterogeneous power nodes using an alternating non-blocking polling strategy; S2: Parsing the data packets to extract power node identifiers and maintaining the set of received identifiers for the current sampling period, generating a timestamp-aligned multi-node synchronization cross-section snapshot; S3: Extracting features from the synchronization cross-section snapshots; when performing frequency domain operations, extracting the dominant frequency features in the frequency domain and comparing them with the theoretical rotational frequency and / or the inherent structural frequency of the rotor to obtain frequency domain anomaly features; S4: Calculating health status indicators based at least on the absolute vibration over-limit penalty value of each power node and the outlier ratio penalty value of the vibration amplitude of each power node relative to the dynamic baseline, combined with the frequency domain anomaly features. This invention can reduce the cross-bus data sampling time deviation to the microsecond level and greatly reduce the false alarm rate.

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