论文部分内容阅读
本文以800轧机液压压下实测频率特性分析为基础,对轧机液压压下稳定性若干问题作了探讨,并得出以下结论:1.计算油缸负载固有频率ω时,它的运动质量应包括所有受到油缸推动质量的等效和,而不仅仅限于半个辊系,否则计算出的结果,以及由此作出的结论都是不正确的。2.胡维茨(Hurwitz)判据仅限于判定线性系统的稳定性。对于轧机液压压下,由于它存在本质非线性,并且是变参数,又由于它的若干参数只能用实测方法求得,因而用胡维茨判据采用计算求得分析液压压下的稳定性,往往导致错误的结论。3.流量对液压压下频率特性的影响十分显著,因而它是分析液压压下稳定性不可忽视的重要因素之一。
Based on the analysis of measured frequency characteristics of 800 mill hydraulic press, this paper discusses some issues about the stability of mill hydraulic press, and draws the following conclusions: 1. When calculating the natural frequency ω of the load, the quality of its movement should include all The equivalent and not only limited to half a roller system is driven by the mass of the cylinder, otherwise the calculated results and the conclusions reached are not correct. 2. The Hurwitz criterion is limited to the stability of linear systems. As for the rolling mill hydraulic pressure, because of its inherent nonlinear and variable parameters, and because of its parameters can only be obtained using the actual measurement method, and thus calculated using the method of calculating the Weivitz criterion to analyze the stability of hydraulic pressure , Often leads to wrong conclusions. 3. The influence of flow on the frequency characteristics of hydraulic pressing is significant, so it is one of the important factors that can not be ignored in analyzing the stability of hydraulic pressing.