摄动法确定控制系统动态参数研究

控制系统的动态参数对于进行准确的系统建模有着至关重要的意义,其常用方法是实验测试法和闭环曲线法。为寻求较优的方法,国内外学者在这方面进行了大量的研究工作,但尚存在不足之处。主要问题是,当系统的特性连续地发生变化时,如何使用一种较为简便的方法,根据已有的测试数据和计算数据得到变化后的系统参数,而不是使用完全重新确定的方法。在详细分析一种典型的闭环衰减曲线法的基础上,提出将摄动法用于系统特性发生变化时的参数确定中。试验表明,该摄动法能减少工作量,结果可靠。

Study on the Determinationof Dynamic Parameters of Control Systems With the Perturbation Method

The determination of dynamic parameters of control systems has a critical meaning to the accurate system modeling. The common methods used for this kind of problem are experimental testing methods and closed-loop damping curve methods. Researchers of overseas and domestic have done a lot of works for finding parameters determination methods, but there are still a lot of shortcomings. One problem is that when a control system changes continuously, how to determine its dynamic parameters with a simple method which is based on the existing test data and calculation data rather than renew test or calculation completely. On the basis of analyzing a typical closed-loop damping curve method, this paper proposes a perturbation method used to determine the parameters of a system when its behavior changes continuously. It shows that the method can reduce the test and calculation works greatly, and its results are reliable.;