激勵型譜 的英文怎麼說
中文拼音 [jīlìxíngpǔ]
激勵型譜
英文
anregungsspektrum incitation spectrum-
With the nonlinearity of vehicle suspension, simulation signal of suspension system is more practical by road exciting signal of time domain than frequency domain, furthermore, it is easy to get the results which are consistent with practical results
考慮到車輛的非線性因素，在進行主動控制分析過程中，懸架系統激勵信號採用時域信號。因此，首先進行了時域路面隨機不平度生成方法的研究，所得路面模型的功率譜密度與理論路面功率譜密度吻合較好。This paper include the following parts. firstly the sine exciting - voltage is guaranteed by direct digital synthesize technology ; secondly the digital output of cos ( 9 ) and sin ( 9 ) are generated by microcontroller ; thirdly the two voltage signals which are the product of the two former signals gained by the multiplying d / a converter, being filtered and amplified, have constant frequency, and one amplitude has sine function relationship of with the input angle, and the other amplitude has cosine function relationship of with the input angle ; finally the two signals are acquired and analyzed by relative instrument and software
主要由以下幾部分組成：用數字頻率合成技術（ dds ）產生正弦激勵電壓信號u _ msin （ t ） ；用單片機產生幅度的數字量輸出sin （ ）和cos （ ） ；用乘法型d a轉換器實現激勵電壓和幅度的乘積，並通過濾波器和功放后即得到頻率固定，幅值隨輸入角成正餘弦變化的電壓信號；最後用數據採集卡採集輸出信號，顯示波形並進行頻譜分析。In addition, the author puts forward that the eggs could be recognized based on the difference in the frequencies of their prompted sounds. because the eggs " prompted sounds are lied on low frequency bands, the microphone and sound amplifier that have excellent duration response should be used. the output signal from the sound amplifier is transferred to data signal by a / d card before it is put into computer
蛋品激勵出的聲音主要集中在低頻段，因此選擇在低頻段有好的頻率響應特性的麥克風和放大電路；放大輸出信號通過a / d採集板變換成相應的電壓數值信號送入計算機，對離散的信號數據進行傅立葉變換得到它的頻譜圖和各頻段能量分布圖；而後將能量分佈特徵數據作為神經網路的輸入值，這樣，好蛋和破損蛋的模型就建立起來。At the same time, using remington ' s wheel - rail interaction model, calculate the interaction force between the wheel and rail and the input power of each subsystem. evaluate the mode count, damping loss factor and coupling loss factor. according the fundamental of the acoustics, predict the wheel - rail noise
同時利用remington建立的輪軌接觸模型，由輪軌間的表面粗糙度譜計算出了輪軌間的接觸力，並將其作為產生輪軌振動的激勵力得到了各子系統的輸入功率。The random excitation of the four wheels is used as the input of this system. the changing rule of vertical displacement, three directions of acceleration power spectrum density function of person - chair system of model ca - 141 and etc. in the frequency domain is simulated using matlab. the rationality of the model is analyzed and validated by comparing of relevant testing results and theoretic analysis
以頻域內四輪隨機激勵作為系統輸入，用matlab模擬低地板城市客車等三種車型人椅系統三向加速度功率譜的變化規律，逐項分析車速、懸架剛度與阻尼參數變化對車輛平順性的影響，通過與相關研究結果的比較及理論分析驗證了模型的合理性。As a classical and practical method in ambient vibration experimental modal analysis, auto - cross spectrum density method replace the frequency response function with power spectrum and achieve its mode shape from transmissibility between the response signals and reference signal
自互譜法作為環境激勵實驗模態分析的一種實用的經典方法，用響應點和參考點間的功率譜曲線來代替頻響函數曲線，並由響應點和參考點之間響應的傳遞率得出振型。The main work and achievements are summarized as follows : according to the spectrum analysis theory, the simple formula of the power spectrum between the excitation and the response is obtained. then the time - domain statistical properties of the structural response are acquired through fourier inverse transform, and cauchy ' s residue theorem is applied to solving the integral of fourier inverse transform, the structural dynamic reliability is calculated in terms of possion hypothesis based on first passage failure
主要研究內容如下：從譜分析理論出發，得到了激勵與響應功率譜之間的簡明關系式，由fourier逆變換得到響應的時域特徵，利用cauchy留數理論處理fourier逆變換的積分式，基於首超破壞的possion假設計算結構系統的動力可靠性，並在此基礎上進行結構優化設計，奠定了確定性模型的基礎。分享友人