一种运行工况下直线电机固有频率计算方法
By installing vibration sensors on linear motors and performing signal processing and matrix calculations, the problem of identifying the longitudinal natural frequency and damping ratio of linear motors under operating conditions was solved, achieving high-precision online calculation and vibration suppression effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHENYANG INST OF ENG
- Filing Date
- 2025-12-10
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies struggle to accurately identify the longitudinal natural frequency and damping ratio of linear motors under continuous operation. Traditional methods cannot adapt to parameter changes during motor service, resulting in significant discrepancies between calculated and actual values.
Two rows of unidirectional vibration sensors are set on the primary core of the linear motor. By signal acquisition, space-traveling wave joint filtering, longitudinal spatial cross-correlation function calculation, spatial complex exponential modeling and singular value decomposition, matrix equations are constructed, and the system poles are solved to obtain the longitudinal natural frequency and damping ratio.
It achieves online identification during motor operation with an error of less than 0.9%, providing an accurate modal database for motor longitudinal vibration suppression and magnetic pole slot shape optimization, and reducing the cost of finite element modeling.
Smart Images
Figure CN121679319B_ABST