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系统辨识是在控制论、数理统计及随机过程等理论基础上发展起来的一门新兴学科。由于系统辨识能在不清楚物理机理的情况下建立各种过程的数学模型,所以近年来它在控制工程、机械、动力、化工、地质、气象、生物、经济等各领域都得到广泛的使用。用系统辨识可对一个过程进行控制、预报、决策、诊断、认识等。系统辨识的理论及方法,无疑地亦是对液压系统及其元件的动态特性进行研究及控制的一种有力工具,所以本刊拟分六期系统而通俗地介绍系统辨识的基本理论及方法,目的是使读者能掌握和使用系统辨识这一有力工具。本期刊登第三讲,前两讲的标题是:建模与辨识;相关辨识法。
System identification is a new subject developed on the theories of cybernetics, mathematical statistics and stochastic processes. In recent years, it has been widely used in various fields such as control engineering, mechanics, power engineering, chemical engineering, geology, meteorology, biology, economy and so on because system identification can establish mathematical models of various processes without knowing the physical mechanism. System identification can be a process control, forecasting, decision-making, diagnosis, awareness and so on. The theory and method of system identification are undoubtedly also a powerful tool to study and control the dynamic characteristics of hydraulic system and its components. Therefore, we systematically introduce the basic theory and method of system identification in six phases, The purpose is to enable readers to grasp and use the powerful tool of system identification. This issue of the third lecture, the first two lectures are: modeling and identification; related identification method.