發(fā)布時(shí)間：2018-09-09 15:51

【摘要】：參數(shù)故障診斷和容差問(wèn)題是模擬電路故障診斷的兩個(gè)主要難題。該文從故障建模入手,提出一種新的復(fù)數(shù)域參數(shù)故障統(tǒng)一建模方法。模擬電路輸出電壓的實(shí)部和虛部都是故障元件參數(shù)的函數(shù),聯(lián)立實(shí)部和虛部函數(shù),并消掉被建模元件參數(shù),得到與參數(shù)無(wú)關(guān)的函數(shù)。該函數(shù)只由電路結(jié)構(gòu)、故障元件位置和無(wú)故障元件的參數(shù)確定。因此,以它作為故障模型就與參數(shù)無(wú)關(guān),能描述任何參數(shù)漂移、開(kāi)路和短路故障。該模型函數(shù)是二次函數(shù),除了無(wú)故障點(diǎn)之外,不同元件的模型函數(shù)會(huì)在復(fù)平面上相交于第二個(gè)點(diǎn),稱為混疊問(wèn)題。該文采用多頻方法來(lái)消除此混疊現(xiàn)象。仿真結(jié)果驗(yàn)證了方法的有效性。
[Abstract]:Parameter fault diagnosis and tolerance are two main problems in analog circuit fault diagnosis. Based on fault modeling, a new unified fault modeling method for complex domain parameters is proposed in this paper. The real part and virtual part of the output voltage of analog circuit are functions of fault component parameter, and the function of real part and virtual part is simultaneous, and the parameter of component is eliminated, and the function independent of parameter is obtained. The function is determined only by the circuit structure, the location of the fault element and the parameters of the non-fault element. Therefore, using it as a fault model is parameter-independent and can describe any parameter drift, open circuit and short circuit fault. The model function is a quadratic function, and the model function of different components intersects at the second point on the complex plane, which is called aliasing problem. In this paper, the multi-frequency method is used to eliminate this aliasing. Simulation results verify the effectiveness of the method.
【作者單位】： 電子科技大學(xué)自動(dòng)化工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(61201009,61271035)
【分類號(hào)】：TN710
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本文編號(hào)：2232825