本文選題：有源噪聲控制 + 自由聲場��； 參考：《西北工業(yè)大學(xué)學(xué)報》2017年04期

【摘要】：與集中式有源控制系統(tǒng)相比,集群式系統(tǒng)具有實現(xiàn)成本低、擴展靈活的優(yōu)點,因此其降噪性能的影響因素研究對工程應(yīng)用有指導(dǎo)意義。首先對集群式系統(tǒng)進行建模,并用最小二乘法求解出最優(yōu)次級源強度;然后推導(dǎo)得出集群式系統(tǒng)與集中式系統(tǒng)等效的充分條件;最后,分析了不滿足等效條件時,自由空間中控制單元劃分和布局方式對降噪性能的影響。結(jié)果表明,集群式系統(tǒng)與集中式系統(tǒng)等效的充分條件是:系統(tǒng)誤差傳感器數(shù)小于或等于次級源數(shù),并且控制單元聲阻抗矩陣與系統(tǒng)聲阻抗矩陣都滿秩。在不滿足上述條件時,只要滿足以下2個條件,集群式系統(tǒng)的性能損失很小:a)各控制單元內(nèi)誤差傳感器數(shù)要不都大于等于次級源數(shù),要不都小于等于次級源數(shù);b)各控制單元子阻抗矩陣滿秩。
[Abstract]:Compared with the centralized active control system, the cluster control system has the advantages of low cost and flexible expansion, so the research on the influencing factors of its noise reduction performance has guiding significance for engineering application. First, the cluster system is modeled, and the optimal secondary source strength is solved by the least square method. Then the sufficient conditions for the cluster system to be equivalent to the centralized system are derived. Finally, when the equivalent condition is not satisfied, The effect of control unit partition and layout on noise reduction in free space. The results show that the sufficient condition that the cluster system is equivalent to the centralized system is that the number of system error sensors is less than or equal to the number of secondary sources, and the acoustic impedance matrix of the control unit and the acoustic impedance matrix of the system have full rank. When the above conditions are not satisfied, as long as the following two conditions are satisfied, the performance loss of the cluster system is very small: a) the number of error sensors in each control unit is either greater than or equal to the number of secondary sources. Either the subimpedance matrix of each control unit is less than or equal to the number of secondary sources.
【作者單位】： 西北工業(yè)大學(xué)航海學(xué)院;中航工業(yè)陜西飛機工業(yè)(集團)有限公司;
【基金】：民用飛機專項科研項目(MJ-2015-F-044)資助
【分類號】：TB535
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本文編號：1806589