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设计采煤机械时,常需对采煤机械的系统动态特性进行研究,了解机组的输入和输出特性,以及它们之间的动态关系,以作为整机和元部件的设计参考和依据。由于煤层结构的不均匀性和不稳定,采煤机械在井下的实际工作过程,是一个随机过程。要了解和控制这样一个随机过程,应建立起此过程的数学模型。这种根据系统或过程的输入和输出数据来建立数学模型的方法,也就是辨识和参数估计方法。但是,由于煤矿的特殊性,要在井下测量采煤机械的各种输入和输出数据,存在着许多困难,如测试仪器的防爆要求、测点的布置和保护等,此外还受到环境和其它条件的
When designing coal mining machinery, it is often necessary to study the dynamic characteristics of coal mining machinery system, to understand the input and output characteristics of the unit and the dynamic relationship between them, as a reference and basis for the design of complete machine and components. Due to the unevenness and instability of coal seam structure, the actual working process of coal mining machinery in the well is a stochastic process. To understand and control such a stochastic process, a mathematical model of this process should be established. This method of establishing a mathematical model based on input or output data of a system or process, that is, identification and parameter estimation methods. However, due to the particularity of coal mines, there are many difficulties in measuring all kinds of input and output data of coal mining machinery downhole, such as explosion-proof requirements of testing instruments, arrangement and protection of measuring points, etc., in addition to environmental and other conditions of