某型渦噴發(fā)動機轉(zhuǎn)速失穩(wěn)仿真研究Simulation of I

研究了某型渦噴發(fā)動機及其控制系統(tǒng)的建模方法，并通過對燃油控制系統(tǒng)控制方程進
行穩(wěn)定性分析和仿真計算，研究了某型渦噴發(fā)動機轉(zhuǎn)速控制系統(tǒng)的分油活門油門桿給定彈簧剛度、分油活門彈簧預壓縮量、分油活門重疊量、離心飛重重量和反饋活門重疊量對于控制系統(tǒng)穩(wěn)定性的影響，找出了導致發(fā)動機試車階段出現(xiàn)轉(zhuǎn)速擺動現(xiàn)象的原因。該仿真結(jié)果有效指導了發(fā)動機研制過程中轉(zhuǎn)速失穩(wěn)故障排除，證明了該仿真方法的有效性。
關(guān)鍵詞：轉(zhuǎn)速擺動；轉(zhuǎn)速控制系統(tǒng)；穩(wěn)定性

Abstract：The mathematical model of a turbojet engine and its control system was established. By simulation on varying parameters of the main fuel control system, the impact of the initial value of the fuel control valve’s spring rate, the initial value of the fuel control valve’s spring reduction, the fuel control valve’s overlap, the weight of the centrifugal weight and the feedback valve’s overlap on the stability of the shaft’s rotating speed was studied. The cause of the oscillatory phenomena of low pressure shaft’s rotating speed was found. This conclusion was effectively applied in the ground tests, and was testified by the tests results.
Keywords：Oscillatory Rotating Speed; Speed Control System; Stability