Wiener-Hammerstein Process Noise System Time Series

The Wiener-Hammerstein system structure is a well-known block-oriented structure. It contains a static nonlinearity that is sandwiched in between two linear time-invariant (LTI) blocks. The presence of the two LTI blocks results in a problem that is harder to identify. The LTI blocks are realized as active filters while the static nonlinearity is implemented as a diode-resistor electronic circuit.<br>The Wiener-Hammerstein system proposed here as a benchmark contains dominant process noise. The process noise enters the system before the static nonlinearity. Two much less significant noise sources are present in the measurement channels of the input and output.<br>All the provided files, data and information on the Wiener-Hammerstein system are available for download here together with an in-depth description of the measured input-output time series. This zip-file contains a detailed system description, an example estimation data set, the test data sets, the datasets measured during the past measurement campaign(s), pictures of the measurement setup, and an indicative electrical circuit schematic of the system. It is possible that the actual implemented Wiener-Hammerstein system deviates at some points (resistor values, opamp type) from the electrical circuit provided here. The data is available in the .csv and .mat file format.<br><br>Wiener-Hammerstein系统（Wiener-Hammerstein system）是一类广为人知的面向块的系统结构。其包含一个静态非线性模块，被夹在两个线性时不变（Linear Time-Invariant, LTI）模块之间。由于两个LTI模块的存在，该系统的辨识难度大幅提升。两个LTI模块以有源滤波器形式实现，而静态非线性模块则采用二极管-电阻电子电路搭建。 本次作为基准数据集提出的Wiener-Hammerstein系统带有显著的过程噪声，该噪声在静态非线性模块之前便注入系统。此外，在输入与输出的测量通道中还存在另外两个影响相对微弱的噪声源。 所有与该Wiener-Hammerstein系统相关的文件、数据及信息均可在此处下载，同时附带实测输入输出时间序列的详细说明。该压缩包包含系统详细描述、示例估计数据集、测试数据集、过往多轮测量中采集的数据集、测量装置实拍图，以及系统的参考电气电路原理图。需注意，实际搭建的Wiener-Hammerstein系统可能在部分参数（如电阻阻值、运算放大器型号）上与本次提供的电路原理图存在偏差。本数据集以.csv和.mat文件格式提供。