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数学模型是自动控制系统分析和设计校正的基础。系统的传递函数获得通常有两种方式,一是机理建模法,二是实验测试法。介绍了基于实验测试法的系统辨识建模方法,在获得离散测试数据基础上,借助计算机软件将测试数据进行数据拟合,采用最小二乘法对测试数据的曲线拟合方便且精度高,合乎工程要求。数字实例表明,实验测试法具有测试精度高,模型精确,后续处理方便等优点。
Mathematical models are the basis for automatic control system analysis and design correction. There are usually two ways to get the transfer function of the system. One is the mechanism modeling method and the other is the experimental testing method. The system identification modeling method based on experimental test is introduced. Based on the discrete test data obtained, the test data is fitted by computer software. The curve fitting of test data by least square method is convenient and accurate, Claim. Numerical examples show that the experimental test method has the advantages of high precision, accurate model and easy follow-up.