Study of the impact of sensor position on the stability of an active vibration control with acceleration feedback
DOI:
https://doi.org/10.5944/ribim.29.2.46364Keywords:
sensor positions, active vibration control, acceleration feedbackAbstract
This work presents a methodology for active vibration control using proportional acceleration feedback, which considers accelerometer positions as design variables. The methodology employs a discrete modal filter to estimate the acceleration components of the vibration modes. This filter decouples the controller tuning from its dependence on sensor positions, thereby simplifying the design and reducing computational complexity. Accelerometer placement is optimized by minimizing a measure on the modal filter gain matrix (Ω). This criterion aims to reduce the interaction of accelerometer noise with the flexible structure's dynamics and to attenuate observation spillover, a key factor that can cause instability when interacting with unmodeled dynamics. Numerical simulations on a flexible beam demonstrate that this methodology reduces the impact of noise and promotes controller stability.
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