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在随机振动控制与随机激振模态分析实验中,频响函数测试是控制及实验过程中的重要环节。介绍一种基于随机化噪声对消技术和微机控制技术实现的新的系统频响函数测试计算方法(简称频响函数噪声对消估计法)。与经典的多次采样平均方法相比,用噪声对消法对系统频响函数进行测试的准确性及效率有较大提高。
In the random vibration control and random vibration modal analysis experiments, the frequency response function test is an important part in the control and experiment process. A new system frequency response function test calculation method based on random noise canceling technique and microcomputer control technology (referred to as frequency response function noise cancellation estimation method) is introduced. Compared with the classical method of multiple sampling and averaging, the accuracy and efficiency of using the noise cancellation method to test the frequency response function of the system are greatly improved.