基于零输入响应的Cauer型RC网络参数辨识方法

发布时间：2018-02-13 10:06

本文关键词： Cauer型RC网络参数辨识零输入响应变参数热网络　出处：《电工技术学报》2017年01期 　论文类型：期刊论文

【摘要】：对于封闭的RC网络,其参数不能直接测量,需要根据端口响应辨识网络参数。但对于等效的RC网络,受实际条件限制,端口激励信号是随机变化的,其模型难以建立。提出了一种基于零输入响应的参数辨识方法。在不考虑激励信号的条件下,分析了RC网络参数和零输入响应条件下时间常数之间的关系,得出在一种工况下不能对参数进行辨识的结论。在此基础上,提出通过级联一阶RC网络,在不同的级联网络参数下得到关于待辨识网络参数的约束方程,根据两组不同的约束方程组可辨识出RC参数。以2阶待辨识的CauerⅠ型电网络为例进行了仿真和实验,结果表明所提方法可对Cauer型RC参数进行辨识。然后,将该方法应用在绝缘栅双极型晶体管(IGBT)的Cauer热网络参数辨识中,也取得了较准确的辨识结果。
[Abstract]:For the closed RC network, the parameters can not be measured directly, so it is necessary to identify the network parameters according to the port response. However, for the equivalent RC network, the port excitation signal is randomly changed due to the actual conditions. A parameter identification method based on zero input response is proposed. The relationship between the parameters of RC network and the time constant of zero input response is analyzed without considering the excitation signal. It is concluded that the parameters can not be identified under one condition. On the basis of this, the constraint equations of the parameters of the network are obtained under different parameters of cascaded first order RC network. The RC parameters can be identified according to two different sets of constraint equations. The simulation and experiment of the two-order Cauer I electric network are carried out. The results show that the proposed method can identify the RC parameters of the Cauer type. The method is applied to the parameter identification of Cauer thermal network with insulated gate bipolar transistor (IGBT), and more accurate identification results are obtained.
【作者单位】：输配电装备及系统安全与新技术国家重点实验室(重庆大学);
【基金】：重庆市杰出青年科学基金项目(CSTC2012JJJQ90004) 国家自然科学基金项目(51577020) 中央高校基本科研业务费项目(CDJZR14158801)资助
【分类号】：TM13

【参考文献】