电流变传动器AR三谱特性

AR trispectral characteristics of electrorheological actuator

应用新的技术方法研究电流变传动器的非高斯过程.高阶谱分析是一种新的信号处理的有效技术,它可以定量描写信号间的非线性耦合,可以抑制噪声、保留了信号的相位信息.本研究当零均值的非高斯白噪声干扰电流变传动器时,利用输出的采样数据,建立四阶累积量的时间序列的自回归模型和自回归三谱,用于分析电流变传动器的动态特性.电流变的传动器的自动检测与控制系统是用NI虚拟仪器构成的.

Disc- shaped actuator utilizing electrorheological fluids （ERF） is an important potential transmission and control device in engineering. This paper is concerned with the development of tech- niques to detect and analyze non - Gaussian processes of the electrorheological actuator. Higher - order spectrum analysis is emerging as a new powerful technique in signal processing, which can describe nonlinear coupling, restrain Gaussian noise and reserve phase component. A time series model of the third - order cumulant being driven by a zero mean and non - Gaussian white noise, proposed as AR （autoregressive） model, is conducted by using the output sampled experimental data of an electrorheological actuator. AR tispectrum are put forward for investigating the dynamic characteristics of the electrorheological actuator. The automatic measurement and control system of electrorheological actuator, based on NI virtual instruments is established.