rotor control mechanism 中文意思是什麼
rotor control mechanism
解釋
旋翼操縱機構-
But the variation of its aerodynamic forces will induce flapping motion and produce the cyclic pitch on the main rotor blades by the bell mixing mechanism. in order to study the effect of bell - hiller stabilizer bar on helicopter stability and control, this paper first analyze the function and the principles, give the flapping equation and a flight dynamic model with bell - hiller stabilizer bar. and then works over the stability and control of uav r - 50 in hover and cruise condition, and analyzed the influence from parameters of the bar to it
為了深入研究希勒伺服旋翼對直升機穩定性和操縱性的影響，本文首先分析了希勒伺服旋翼的功能和工作原理，推導了伺服旋翼的揮舞運動方程，建立了帶有希勒伺服旋翼直升機的飛行動力學模型，然後以yamahar - 50無人直升機為例，分析該直升機在懸停和前飛時的平衡、穩定性和操縱性，在此基礎上進一步研究希勒伺服旋翼設計參數變化對直升機穩定性和操縱性的影響。 -
Firstly, this paper introduces the asynchronous motor model, and compares it with the dc motor ’ s. then the paper studies the principle of vector control, and proposes an improved current model of rotor flux observer. this paper also studies the three - level inverter ’ s topology, working principle, the neutral - potential unbalance mechanism and its controlling strategy. the paper especially studies the svpwm in details. the interface between the vector control and the three - level inverter is studied in details, including the generation of reference voltage vector, its judging of the sector and triangular regions, and the working mechanism after it sent into three - level inverter. when synthesizing the reference voltage vector, select the vector which only includes p and o states as the starting vector, thus eliminate the vector shift problem when sector changes. this paper fully takes advantages of the powerful functions of matlab / simulink to set up the simulation model. this construction is very explicit. the simulation results verify the inverter voltage output is correct, the rotor flux is steady, the asynchronous motor ’ s dynamic and steady state performances and speed modulation are excellent
本文首先介紹了異步電機的數學模型，在此基礎上將異步電機的數學模型與直流電機的數學模型進行了比較;然後介紹了矢量控制的基本原理，採用了一種改進的轉子磁鏈電流型觀測模型;對三電平逆變器的電路拓撲、工作原理、中點電位不平衡的機理及控制方法進行了介紹，詳細分析了空間矢量脈寬調制策略。本文對異步電機的矢量控制與三電平逆變器之間的介面進行了詳細的研究，包括:參考電壓矢量的形成、所落扇區與具體小三角形區域的判斷、送入逆變器之後的工作機理。在參考電壓矢量的合成時，選擇只包含p 、 o狀態的空間電壓矢量作為起始矢量，解決了扇區切換時的矢量突變問題。 -
For a long time, people have carried out a large amount of research on the rotor angle stability, clarified the mechanism of angle instability, and set up a relatively mature theory of analysis and control that widely used in the power system
長期以來，人們對功角穩定性進行了大量的研究，弄清了功角失穩的機理，建立了比較成熟的分析和控制理論，並在電力系統中得到了廣泛的應用。 -
But the mechanism of the voltage instability or collapse are still not at all clear as compare with that of the rotor angle instability. not only the relations of voltage instability to rotor angle stability have not established, but also the relatively intact analysis and control theory of voltage stability have not set up
但是，人們對電壓失穩或者電壓崩潰的機理尚不完全清楚，沒有建立電壓穩定和功角穩定關系的理論，也沒有建立比較完整的電壓穩定性分析和控制理論。 -
( 3 ) study on the control mechanism of structure noise radiated from rotary machines, we build a common model of rotary machine structure noise analysis relied on the general characters of rotary machines. based on this model, we analyzed various influence factors to structure radiant noise using the union of revolution and numerical calculation method. we found that the joint stiffness between the rotor and the frame is the most sensitive parameter of structure radiant noise by calculating and analyzing
在旋轉機械結構噪聲控制方面，根據旋轉機械的基本特徵，建立了旋轉機械結構噪聲分析的簡化模型，基於該模型利用解析與數值計算相結合的方法對結構噪聲的各種影響因素進行了分析，通過計算分析發現，轉子與機體的連接剛度是機體結構聲的最敏感參數，同時各參數對結構噪聲的影響具有互補性。
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