Active vibration isolation of a flexible structure mounted on a vibrating elastic base

摘要: Abstract The problem of isolating the vibration at any location on a flexible structure mounted vibrating base is considered using Kalman-based active feedforward–feedback controller (KAFB) with non-collocated sensors and actuators. control strategy developed in this study focuses lowering force transmitted to through its elastic foundation presence process measurements noise. A state-space model constructed from natural frequencies mode shapes generated via finite element modal analysis structure. important aspect proposed that, while it's design based full order physical (plant), implementation reduced realization second estimator regardless plant model, negligible effect accuracy performance. Therefore, requires low computational effort, which makes it well suited for real time applications. Another unique agility speed compensating phase or magnitude mismatch between force. Moreover, stability system implicitly attained by controllability condition posed Kalman filter model. Thus, proper choice gains will drive states structure, sensor location, ideally zero. In addition digital can be easily done considering fact that discrete exact. Numerical simulation performance carried out results are presented.