车身顶棚振动独立模态控制研究

Research on Vibration Control of Car Roof Based on  Independent Modal Space Algorithm

摘要:

针对乘用车结构振动和噪声问题,对嵌入压电传感器和致动器的汽车顶棚进行了振动主动控制研究；对压电平板进行数学建模,通过有限元分析某国产乘用车车身顶棚模态振型,合理选择传感器和致动器增益,作为最小化振动响应这一目标函数的参数；控制器的设计应用了独立模态空间控制法,将压电传感器和致动器及独立模态空间控制法(IMSC)组成的控制系统应用于汽车顶棚振动主动控制,实验结果表明,即使当控制回路被电磁噪声干扰时,控制前后系统的振级相差可达到30%左右,取得了有效的振动抑制效果。

Abstract:

Active vibration control of car roof embedded piezoelectric sensors and actuators have been studied for the question of vibration and noise in car. Mathematical model of piezoelectric plate has been created. Vibration mode of a car roof has been analyzed through finite element analysis. The gains of sensors and actuators have been formulated as the objective function parameters to minimize the vibration response. The control system is composed of piezoelectric sensors, actuators and the independent modal space controller (IMSC) have been applied in active vibration control of car roof. The finite element model of car roof has been constructed for modal analysis. This control method has been proved to be available by experiment result. 