超高斯伪随机振动激励信号的生成技术

The technique of generating super-Gaussian and quasi-random vibration exciting signals

振动激发试验和振动模拟试验的最新发展都需要产生超高斯分布的随机振动激励信号。然而,目前基于功率谱均衡的数字式随机振动控制系统只能产生高斯分布的随机振动激励信号。研究具有指定功率谱密度分布的超高斯伪随机振动激励信号的生成技术,从而使现有的数字式随机振动控制系统可以同时具有频域和幅值域的双域控制及均衡能力。仿真和试验结果验证了该方法的正确性和有效性。

With the latest development of vibration stimulation test, there is a strong need for the technique of generating random vibration exciting signals with super-Gaussian probability distribution. However, the digital random vibration control systems currently based on power spectrum fitting can only generate random vibration exciting signals with Gaussian probability distribution. This paper studies the technique of generating super-Gaussian and quasi-random vibration exciting signals with a specified power spectral density, thus enables the vibration control systems to have the capability of a 'bi-domain' (frequency and amplitude domain) control simultaneously. Simulation and test results validate the method.