板振动的无需次级通道建模的分散式前馈控制方法研究

A novel decentralized feedforward control strategy for a plate vibration without secondary path modeling using piezoelectric patch actuators

针对板的振动,提出一种无需次级通道建模的分散式前馈控制方法。该前馈控制方法不需要结构的物理信息,并且能够控制板在非共振频率处的线谱振动。采用压电片和加速度计分别作为执行和传感元件,建立了简支板振动主动控制的理论模型和实验系统。提出了分散式前馈控制策略,并分析了无需次级通道建模的分散式前馈控制算法的稳定性。提出一种内模滤波器将加速度信号转变为速度信号,并补偿抗混叠滤波器和平滑滤波器的频率响应,使执行器和传感器保持同位配置。通过仿真和实验验证了该算法的有效性。

Here,a novel decentralized feedforward control strategy for a plate vibration without secondary path modeling was proposed.This control method did not need any structure information of a plate and it could be used to control the harmonic vibrations of a plate at its off-resonance frequencies.A theoretical model and a test system for active vibration control of a plate supported simply using piezoelectric patch actuators and accelerometers were built.The stability of the control method was analyzed theoretically and experimentally.Besides,a kind of internal modal filter （IMF）was proposed,with it a acceleration signal could be converted into a velocity one.This IMF could guarantee the collocated properties of transducer pairs.Both simulation and test results showed that the decentralized feedforward control strategy is effective.