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本文讨论机翼模型实验模态参数识别技术。采用整倍周期伪随机信号激励,试验和测量系统用 Z80单板机自动控制。通过 FFT 在最小二乘意义下求得频率响应函数的最佳估计。用改进的 Miramand 方法识别复模态参数,并与有限元方法计算结果进行了比较。
This article discusses the wing model experimental modal parameter identification technology. The whole cycle of pseudo-random signal excitation, test and measurement system with Z80 single-board automatic control. The best estimate of the frequency response function is obtained by FFT in the sense of least squares. The complex mode parameters were identified by the modified Miramand method and compared with the finite element method.