振蕩性沖擊 的英文怎麼說
中文拼音 [zhèndàngxìngchōngjī]
振蕩性沖擊
英文
oscillatory surge-
The shearing layer is carried by the jet and the eddy is formed because of the instability and selective amplification of shearing layer which will propagate to the downstream. as the eddy impacts the impinging wall, a wave of pressure disturbance with certain frequency is induced. this wave then propagates to the upstream with high speed, and results in the overlap and amplification of the waves when the frequencies of them are close with each other
當前噴嘴流束中的不穩定擾動波在穿過腔內的剪切層時，剪切層對其有選擇放大作用，形成渦環結構，剪切流動中渦環與碰撞壁撞擊，在碰撞區域產生壓力擾動波並向上游反射，在上游剪切層分離處誘發新的擾動的產生，當新擾動與原擾動匹配時，射流上游就被不斷地受到周期性激勵，腔內就產生流體自激振蕩並在後噴嘴出口形成脈沖射流。The limited - jerk control commands are designed by fixing on a jerk maximum to limit the varying ratio of the reference orders, then the optimal time delays are solved by minimizing the oscillation energy of flexible modes
通過確定最大沖擊值，對指令信號的時間變化率加以限制來設計有限沖擊控制指令，然後令柔性模態振蕩能量最小，計算濾波器的最優時滯。With the model, direct starting, increasing voltage starting and current limit starting are studied and compared. the results of simulation suggest that current limit starting has good performance in starting current and torque limit and their oscillation restraint
從模擬結果可以看出，無論在減小起動電流沖擊、減小起動轉矩沖擊，還是在抑制電機電流、轉矩振蕩方面，採用限流軟起動方式都表現出良好的性能。
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