flutter test 中文意思是什麼

flutter test 解釋
顫振試驗
  • flutter : vi 1 拍翅振翼；（旗幟）飄揚。2 顫動，（心）急跳，（脈搏）浮動。3 （心緒）不寧，坐立不安。4 〈口語...
  • test : n 1 檢驗，檢查；考查；測驗；考試；考驗。2 檢驗用品；試金石；【化學】試藥；（判斷的）標準。3 【化...
  1. Flutter boundary prediction ( fbp ) based upon sub - critical turbulence response analysis is an important research work in flutter test field of aircraft

    基於飛機結構亞臨界響應分析的顫振邊界預測（ fbp ）技術是顫振試驗研究的重要課題。
  2. 2. a systematic test has been carried out to observe how the model actuating frequencies and amplitudes affect the flutter derivatives, and the effect is found to be quite minor

    通過系列試驗考查了模型驅動頻率和振幅對顫振導數的影響，驗證了驅動頻率和振幅對顫振導數影響很小。
  3. A test has been carried out on three typical bridges sectional models of flutter derivatives to find the general rules with the change of flutter derivatives of the bridges sectional model. and it has been discovered that this change depend on the torsional damping, an element closely relating to the h * 2 and a * 2 4

    通過對三種典型斷面顫振導數的測試，考查了各顫振導數隨斷面形狀的變化趨勢，說明了最主要的變化體現在與扭轉阻尼有關的h _ 2和a _ 2項。
  4. As to the current problems existing in the identification for these flutter derivatives, the dissertation tries to trace the development in the identification for the past unsteady aerodynamic forces of long - span bridges. it also investigates the method for flutter and buffeting analysis and the flutter derivatives. based on the present methods used in obtaining the unsteady aerodynamic forces and flutter derivatives, and co - funded by a natural scientific fund from the nation and a key project fund from the railway ministry, the current research has attempted to develop a device which can be employed in the wind tunnel to test flutter derivative through a forced vibration method

    鑒于目前橋梁斷面顫振導數識別的水平和存在的問題，本文通過對大跨度橋梁非定常氣動力、顫振分析方法及顫振導數識別方法的回顧和評述，基於現有的非定常氣動力和顫振導數的測試方法，在國家自然科學基金與鐵道部重點學科基金的聯合資助下，研究開發了一套在風洞中採用強迫振動法測試顫振導數的裝置。
  5. Especially, the technique proposed here can be expanded to the flutter test with variable speed. the related software is developed on labview for windows

    並通過數值模擬和某型飛機氣彈模型低速風洞顫振試驗驗證了方案的有效性、可靠性和工程實用性。
  6. In this paper, according to the characters and processing requirements of flutter test data, based on the general theory of wavelet analysis, a set of laplace wavelets are introduced

    本文根據顫振試驗信號的基本特徵和處理要求，在對小波一般理論研究的基礎上，引入了一種適用於顫振試驗信號處理（ ftdp ）的小波? ? laplace小波。
  7. At last the properties of the laplace wavelet algorithm was demonstrated by digital simulation signal and wind tunnel flutter test signal. it comes the result that correlation filtering using laplace is a very promising and feasible approach

    本文演算法是採用matlab語言實現的，通過數字模擬和實際的風洞顫振試驗信號，對方法的數值特性和應用情況進行了考核和驗證。
  8. The theory analysis and method principle are presented the characteristics of the two methods are studied by computer numerical simulation. the results show that both the methods are reasonable and feasible. focused on the features and requirements of flutter test data processing, the methods presented here are used to pickup the major information as a pre - processing technique the application scheme is brought out for flutter boundary prediction based on subcritica

    根據顫振試驗的原理和觀測信號特點，本文將所提出的兩種時頻域濾波演算法引入到了飛機結構亞臨界響應分析的顫振邊界預測（ fbp ）研究當中，給出了一種新的顫振邊界預測方案，即通過聯合時頻分析與時頻域濾波提取有效信號再進行模態參數提取與顫振邊界預測。
  9. Focused on the nonstationary features and analysis requirements of flutter test data, the application scheme is brought forward for flutter signal processing. by using computer simulation and flutter test of low - speed wind - tunnel of some aeroelastical modes, the characteristics of the scheme are investigated

    本文基於顫振試驗信號的非平穩特點與分析需求，應用自適應時頻分析技術給出並實現了兩種新的顫振信號處理方案，重點研究了適用於連續變速顫振試驗的顫振邊界預測問題。
  10. In chapter 4, the aeroelastic model of the whole test rig is first established by using jones ’ s approximation of theodorsen ’ s unsteady aerodynamics load. then, the numerical simulations and wind tunnel experiments for the sub - optimal flutter suppression of the airfoil model are presented

    數值模擬和風洞實驗研究表明，以超聲電機為控制面作動器可以有效地抑制翼段模型的顫振，顫振臨界速度提高了13 . 4 % ，數值模擬和風洞實驗結果基本吻合。
  11. The dissertation presents the combined theoretical, numerical and experimental studies on the experimental modeling of the actuator, the design of test rig and control system, the modeling of two - dimensional airfoil aeroelastic system, the control design of active flutter suppression, and the effect of group delay in the digital filter on the stability of aeroelastic closed - loop system

    本文通過理論分析、數值模擬與風洞實驗相結合的方法，研究了超聲電機作動器建模、翼段顫振實驗裝置和控制系統設計、二維翼段氣動彈性系統建模、顫振抑制控制律設計以及數字濾波器群時延對顫振抑制閉環系統穩定性影響等問題。
  12. R. p. m. wow and flutter test records 33 1 3 and 45 u min r. p. m

    失調測定試驗唱片33 1 3和45轉分
  13. Wow and flutter test record

    抖晃度測試唱片
  14. According to the features and requirements of flutter test signal, the method for edge detection is used to pickup the major information of signal image, and a new technique is brought out for the flutter boundary prediction

    基於多尺度圖像邊緣檢測技術，本文研究了飛機結構顫振的邊界預測問題，給出了一種新的穩定性參數估計方法。
  15. It incorporates organically the flight test data and the flutter theory model by the structured singular value theories, to process the flutter boundary estimate

    利用結構奇異值理論將顫振理論模型和試飛數據有機結合起來，進行了顫振邊界預測。
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