negative damping 中文意思是什麼
negative damping
解釋
負阻尼-
Torsional interaction exists between hvdc converters and turbine - generators, and negative electrical damping provided by hvdc may cause subsynchronous oscillation ( sso ) that can lead to turbine - generator shaft failure and electrical instability at oscillation frequencies lower than the fundamental system frequency
高壓直流輸電（ high - voltage - direct - current - - - - hvdc ）系統與臨近同步發電機組之間存在著扭振相互作用， hvdc的電氣負阻尼作用有可能引起機組在次同步頻率范圍的扭轉振蕩。 -
Those sensitive parameters making system have negative damping and occur self - excited shimmy are horizontal pulling lever rigidity, tire sideslip rigidity, steering gear rigidity and damping, kingpin equivalent damping, kingpin caster angle, tire drag. and wheel center distance, tire side rigidity, vehicle wheel unbalanced mass, tire vertical rigidity, and distance from kingpin center to the vertical central line plane of tire have great influence on shimmy, but they do n ' t make the system have negative damping. and horizontal pulling lever damping, suspension damping and rigidity have very small influence on shimmy
橫拉桿剛度、輪胎的側偏剛度、轉向機剛度、轉向機阻尼、繞主銷當量阻尼、主銷后傾角、輪胎拖距是影響擺振的敏感性參數，適當調節某一參數可引起系統的負阻尼，使系統產生自激擺振；輪距、輪胎側向剛度、車輪上的不平衡質量、輪胎垂向剛度及主銷延長線與地面交點至車輪平面的距離對擺振的影響也較大，但不會使系統出現負阻尼；而橫拉桿阻尼、懸架阻尼與懸架剛度對擺振的影響很小。 -
According to these theories we know the reason of the emergence of low frequency oscillation is lacking positive damping even appearing negative damping. this problem can be classified as dynamic stability
從而得出，電力系統低頻振蕩是由於系統正阻尼不足甚至產生負阻尼而引起的，可以將其歸類為動態穩定問題。 -
Through the deep study of f. d. demello dynamic model of electromechanical transition and synchronous generator theory, we proposed a new control strategy of excitation device that can eliminate the negative - damping phenomenon, which is directly against the cause of producing negative - damping represented as low frequency oscillation in the system
通過深入研究f . d . demello機電暫態的動力學模型以及同步發電機理論，針對系統產生負阻尼即低頻振蕩的原因，我們提出了一種新的可消除負阻尼現象的勵磁控制策略。 -
To reproduce the narrow - band response, based on the thought of kanamori etc., the damping ratio and natural period are modified. through this adjustment, the narrow - band response can be reproduced, but for some natural periods the adjustive damping ratio has become negative. the negative damping is strange and can not be explained by the equation of motion for sdof system
為了生成窄頻帶反應，本文根據kanamori等人的方法調整了計算時的阻尼比及自振周期，調整后的單邊差分方法能在共振區域生成很好的窄頻帶反應，但是對一些周期點的阻尼比調整成為了負值，這從系統的動力平衡方程是難以解釋的。 -
In the dissertation, the effects of bias voltage polarity on the measurement and the normal operation are deeply researched when the voltage polarity is positive - positive, negative - positive and negative - negative respectively. the results are compared with the ones studied by others when the voltage polarity is positive - negative. the air damping of the laterally driven microstructures is slide - film air damping
本文通過改變偏置電壓極性分別為正?正、負?正、負?負，並和偏置電壓極性為正?負配置時進行對比，深入研究了電容式傳感器在不同偏置電壓極性下，驅動信號產生的靜電力對傳感器檢測和工作性能的影響。 -
Abstract : based on the bouncing dynamic model & amp; vibration equation established in paper we analyse the damping ratio of vehicle suspension. we discass the stabilation of vibration system when the equivalent damping of shock absorber is zero or negative. we also provide the technology order which makes the system stable and un - corservative
文摘:該文在建立振動動力學模型和運動方程的基礎上，通過對車輛懸架阻尼比分析，就減振器阻尼等效為零或為負時，對振動系統穩定性影響及產生原因進行了探討.提出設計和製造過程中有效控制系統穩定和非保守特性的技術路線 -
Based on the bouncing dynamic model & vibration equation established in paper we analyse the damping ratio of vehicle suspension. we discass the stabilation of vibration system when the equivalent damping of shock absorber is zero or negative. we also provide the technology order which makes the system stable and un - corservative
該文在建立振動動力學模型和運動方程的基礎上，通過對車輛懸架阻尼比分析，就減振器阻尼等效為零或為負時，對振動系統穩定性影響及產生原因進行了探討.提出設計和製造過程中有效控制系統穩定和非保守特性的技術路線
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