variable pitch 中文意思是什麼
variable pitch
解釋
變斜度-
Variable pitch airscrew
變距螺旋槳 -
The horizontal anger has a variable pitch.
橫向攪龍具有可變的螺距。 -
In this paper, different computation methods and the hydrodynamic performance of vertical - axis variable - pitch cycloidal ( voith - schneider ) rotor and kobold horizontal - axis rotor are studied
本文以可調角直葉擺線式水輪機和蹼板式水輪機為對象，研究它們的水動力性能及其理論計算方法。 -
The main task of the paper is to control a major variable pitch wind turbine generator with intelligent controller so as to make it run well
本論文是用智能控制器來實現大型變槳距風力發電機的電控系統。 -
Based on 1mw wind turbine design, this paper offers one reasonable variable - pitch structure, which can response quickly and operate conveniently
本文按照1mw風電機組總體方案要求，設計出一種結構合理，反應靈敏、操作方便的變槳距機構。 -
According to the effect of variable - pitch system, we can divide the operation process into three states : starting, below rated power and rated power
變槳距風力發電機組根據變槳距系統所起的作用可分為三種運行狀態，即風力發電機組的起動狀態、欠功率狀態和額定功率狀態。 -
The control parameters influenced the loads of the stall wind turbine small. but it will be bigger to the variable pitch wind turbine and the variable speed wind turbine
對于bladedforwindows軟體，定槳距失速調節型風力發電機組控制參數的輸入量比較少，對機組載荷的影響也比較小。 -
Compared with fix - pitch wind turbine, the variable - pitch wind turbine has the virtue : stable output power over rated power, high wind power coefficient, holding rated power at high wind speed, good starting and shut - off etc.
變槳距風力發電機組與定槳距風力發電機組相比，在額定功率點以上輸出功率平穩、具有較高的風能利用系數、能夠確保高風速段的額定功率、起動性能與制動性能好等特點。 -
The characteristics of wind turbine generators as well as features of the fixed pitch wind turbine generator and the variable pitch wind turbine generator are presented, emphasizing on the variable speed constant frequency ( vscf ) generating system based on doubly - fed generators and on the control system for pitch angles
在簡述風力機特性的基礎上，介紹了定槳距和變槳距發電機組的特點，重點分析了基於雙饋發電機的變速恆頻發電系統及槳葉節距角控制系統。 -
The result of computer and analysis based on blade elements theory shows us that we can regulate the rotate speed of wind turbine rotor by changing set angle and pitch h. variable - pitch system is the key component of the whole wind turbine, which can assure safely pitch - control and brake
本文利用葉素理論，經計算分析得出：通過改變風力機安裝角可以改變槳距h ，從而改變風力機的轉速。變距機構是變槳距控制型風電機組實現變距控制和安全剎車的關鍵機構之一，它的運動由平動和轉動兩部分組成。 -
Nc milling - machine big size variable - pitch screw rod
數控車銑加工大尺寸變螺距絲杠 -
Specifies a variable - pitch font
指定間距可變的字體。 -
At first an analysis of the basic principles of the vertical - axis variable - pitch turbine is given including two methods to calculate the induced velocity. one is the three different streamtube - methods which are single - disk single - streamtube ( sdst ), double - disk single - streamtube ( ddst ) and multi - streamtube ( mtt ) method based on the momentum theory, the other is the vortex method ( vtth ) based on the potential eddy theory
一是根據動量定理的流管模型得到的求解誘導速度的單盤面?單流管方法（ sdst ） 、雙盤面?單流管（ ddst ）方法、多流管（ mtt ）方法；二是根據勢渦理論得到的求解誘導速度的的渦方法（ vtth ） 。 -
For the vertical - axis variable - pitch cycloidal rotor, the article unify hydrodynamic performance symbol at first, classify and trim the calculation methods and formula of predicting fluid dynamical capability of water - power rotor and wind - power wheel that have been formed up to now
對于可調角直葉擺線式水輪機，首先統一定義了水動力性能符號，將已有的水力與風力轉輪的流體動力性能理論計算方法和計算公式進行分類和整理。 -
A hydrodynamic optimal method to enhance the energy conversion coefficient of the vertical - axis variable - pitch turbine is presented in this paper based on the analysis of the existing mathematical models, on the computational methods for predicting the hydrodynamic performance of turbines and on the available experimental results. by applying mathematical optimal theory, a mathematical model for optimizing the hydrodynamic attack angle of the blades of turbines is formulated and some numerical results are obtained as well
本文在總結和研究豎軸可調角直葉水輪機水動力性能計算的現有數學模型，計算方法和實驗結果的基礎上，運用最優化理論，給出了改善和提高該種水輪機能量利用率的一種優化方法，建立了數學模型，並得到了計算結果。 -
At first we analyzed the optical network joins the partial wave - length variable pitch point to the network performance improvement and on how reasonable placed in wdm optical network switching nodes in order to achieve better network performance to improve the effectiveness of the study
本文首先分析了光網路加入部分波長可變節點對網路性能的改善，並對如何在wdm光網路中合理放置轉換節點，以達到較好改善網路性能的效果進行了研究。 -
Second, the paper introduces the modeling of the major variable pitch wind turbine generator in detail and presents the simulink result of the major variable pitch wind turbine generator without controller. third, in the third chapter the paper puts forward a control tactics of the major variable pitch wind turbine generator. for comparing conveniently with the neural networks controller and the fuzzy controller that have been designed in the later chapters, this paper gives the simulink result of the major variable pitch wind turbine generator with pid controller in brief
首先，簡單地介紹了控制理論、神經網路和模糊控制的發展概況以及風力發電機的現狀；其次，詳細地介紹了大型變槳距風力發電機的模型的建立，並給出了風力發電機系統的開環模擬結果；接著，在第三章提出了大型變槳距風力發電機的控制策略，為了便於和後面設計出的神經網路控制器和模糊控制器相比較，本論文還簡要地作出了pid控制器的模擬結果；然後，分別設計出了神經網路控制器和模糊控制器並模擬出了令人滿意的結果。 -
The main technological characteristics include not only the integrated optimizing design of variable speed and constant frequency, ensuring the wind turbines to adapt to diversified wind plants with different temperatures and geographical conditions, but also the maximum wind power captured at optimized tip speed ratio below the rated wind speed and security protection of constant power output above the rated wind speed by variable pitch regulation
主要技術特點是整體綜合優化設計、變速恆頻運行、適合不同氣候特點和地理環境的風電場；風機全翼展變漿距功率調節、額定風速以下最佳變速比運行最大風能捕獲、額定風速以上恆功率輸出具有安全保護功能。 -
It has been well established by studies in reading that text printed with variable - pitch fonts is more readable than fixed - pitch font texts
閱讀用可變字體列印的文本比用等寬字體的文本更易讀，這已被確定。 -
Variable pitch reversing propeller
變距可逆螺旋槳
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