【摘要】 在只获得加速度的情况下 ,针对空间柔性智能桁架结构 ,进行了主动控制方法的实时仿真实验 .实验通过加速度传感器测量加速度 ,建立了有信号调理、模数转换和微机实时测控的实时计算机控制系统 .通过扫频激励进行了实时控制实验 ,给出了控制前后节点 3 0y方向的固有频率和阻尼比的变化情况及控制某一阶模态时被控模态响应曲线 .验证了采用独立模态空间控制方法设计的空间柔性智能桁架结构振动主动控制规律的实用性 .实验结果表明该控制使被控模态阻尼比增加 ,频响函数的幅值衰减较大 ,有较明显的控制效果 .更多还原

【Abstract】 The paper discussed the simulation experiment of active vibration control method of flexible space intelligent truss structures with acceleration measurements. The real time computer control experiment is based on signal condition, A/D transform and computer measurement and controlling system. With the sweep frequency input signal the experiment is accomplished in time and gives the results of nature frequency and damp rate changing at the direction of 30 y node and displays response graph of the controlled modal before and after controlling. The experiment proves that the active controlling method based on independent modal space control strategy (IMSC) is effective and practical. The experimental result shows that the modal damp rates are increased and the amplitudes of frequency response function are lower.更多还原