mechanical excitation 中文意思是什麼

mechanical excitation 解釋
機械激勵
  • mechanical : adj 1 機械的；機械制的。2 機械學的，力學的；物理上的（opp chemical）。3 機工的，技工的；自動的；...
  • excitation : n. 1. 刺激，興奮，激發，鼓舞。2. 【物理學】激發；【電學】激勵、勵磁。3. 【植物；植物學】激感（現象）。
  1. Its principle is : a laminated structure ( beam or plate ) with delamination consists of undelaminated region and delaminted region which can be divided to upper and lower parts. when a low - amplitude and high - frequency excitation has the frequency close to some part ' s natural frequency, this part will resonate and certain amount of mechanical energy will convert to heat so that the delaminated region ' s temperature exceeds greatly that of the undelaminated region. therefore the delamination can be located by means of infrared thermograph

    其原理是具有脫層的層合材料構件（梁或板）包含脫層區域及未脫層區域，脫層區域分為上下兩部分，若對層合材料構件施加小振幅、高頻率的振動激勵，當激勵頻率恰好接近其中一部分的固有頻率時，該部分就會產生共振響應，部分機械能將轉化為熱能，使脫層區域的溫度遠高於未脫層區域，藉助紅外熱像儀即可顯示出脫層的位置。
  2. The stability of electric power system has been being focused for a long time toprevent a power system from losing synchronism after sudden fault ， researchers have done much work and got many accomplishments this paper applied the direct feedback linearization ( dfl ) technique on the power system ， a strong nonlinear system simulation results by matlab proved this method efficiency main works and results are as follows ： this paper compared some existing methods in excitation control ， fast valve control and coordinated control respectively, analyzed the developments and actuality of nonlinear control research in brief, illustrated why ransient stability could be greatly improved by using the fast valve control in chapter 3 ， indicated the importance of coordinated control farther this paper introduced the inverse system theory, based on which ， discussed the dfl theory, pointed out which had consistency with the inverse theory, expanded the dfl theory combined the idiographic model equations ， made which adapt to the model of a single machine - infinite bus power system this paper referenced abundance articles and educed a set of equations ， which could describe the dynamical process of excitation and fast valve control for synchronous generators in the equations ， there were several very important parameters of power system - - rotor angle ( ) ， rotor speed ( ) ， generator q axis voltage ( eq ) ， transient voltage ( e ' q ) ， active power ( pe ) ， mechanical input power ( pm ) ， valve opening ( ) ， generator terminal voltage ( vt ) ， based on the model ， nonlinear coordinated controller and terminal voltage optimal controller have been designed by using the expanded dfl theory and lq optimal control theory the simulation results showed that the controller could keep power system transiently stable under the effects of a symmetrical 3 - phase short circuit fault ， which achieved better postfault regulation compared with another two routine methods ， one is the proportion excitation controller and proportion fast valve controller, the other is the proportion excitation controller and the optimal fast valve controller, which could exert good performance when met 1ittle disturbance either

    在介紹逆系統理論的基礎上，詳細介紹了dfl理論，通過比較闡明了dfl理論其本質是逆系統方法的一類，並結合具體課題推導出的模型方程將dfl理論進行了擴展，使之適應于電力系統這個強非線性對象。通過參考大量的書籍文獻推導出一套實用的可將大型汽輪發電機勵磁與汽門綜合起來進行控制的模型方程，此模型方程涵蓋了電力系統中特別引人注目的幾個量- -轉子角、轉子轉速、發電機q軸電勢eq 、暫態電勢e ' q 、有功功率pe 、機械功率pm 、汽門開度、機端電壓vt ，在此基礎上建立了實用的電力系統簡化的數學模型，並將擴展的dfl理論應用於此模型系統，結合線性二次型最優控制理論設計出大型汽輪發電機的非線性綜合控制器及機端電壓最優控制器，通過模擬實驗與採用常規的按電壓偏差進行調節的比例式勵磁控制器+汽門比例控制及採用常規的按電壓偏差進行調節的比例式勵磁調節器和基於二次型性能指標設計的最優快控汽門（考慮發電機的飽和因素）進行了對比，證實了採用此種控制器可以有效地提高電力系統的暫態穩定性，並且在電力系統遭受小干擾時同樣具有良好的調節性能。
  3. Experimental determination of mechanical mobility - measurement using impact excitation with an exciter which is not attached to the structure

    機械機動性實驗測定.第5部分:使用激發器
  4. Experimental determination of mechanical mobility - measurements using single - point translation excitation with an attached vibration exciter

    機械導鈉的試驗確定用激振器作單點激勵測量
  5. Methods for experimental determination of mechanical mobility - measurements using single - point translation excitation with an attached vibration exciter

    機械機動性的實驗測定方法.第2部分:用有附加激振器的單點平移激勵設備進行測量
  6. Methods for the experimental determination of mechanical mobility - part 2 : measurements using single - point translational excitation

    機械靈活性的實驗測定方法:第2部分:用單點變換激發方法進行測量
  7. Considering the principle of the mechanical admittance method in pile dynamic testing is to identify the pile ' s dynamic characteristic through measuring the excitation function and the response function at the head of it

    考慮到樁基動測中導納法是通過測定施加給樁的激勵函數和樁的動態響應函數來識別樁的動態特性這一原理。
  8. The feasibility of evaluating the pre - stress with the measured frequencies of a structure under external excitation, and the influence of the mean normal stress on the mechanical properties of a column was also discussed

    第七章提出了用固有頻率的測試評估預應力效果的思想，論證了其技術可行性。指出了鋼管內填物的壓力產生的初應力對臨界壓力的有利影響。
  9. The model and the single period objective function inversion method can be used for linear physical and mechanical parameters inversion of the other dynamic soil - box foundation - frame structure interaction systems under top harmonic excitation

    該計算模型和單周期目標函數反演方法，可用於其他土-箱型基礎-框架結構動力相互作用系統在簡諧激振力下線性物理力學參數的反演。
  10. Third, through employing the 2 - d lumped mass model and the single period objective function inversion method developed in this paper, and taking the measured structure response to a harmonic excitation at the top of structure in field as the reversion objectives, the linear physical and mechanical parameter inversion is performed in ansys by using apdl

    第三，採用二維集中質量模型和本文提出的單周期目標函數反演方法，把頂部激振下實測的結構動力響應作為反演目標，利用apdl語言，在ansys軟體中實現了系統線性物理力學參數的反演。
  11. Based on mechanical vibration theory, with the torque divider ' s structure unchanged, there exist two kinds of approach to reduce the resonance : one is keeping the bending vibration frequency away from the excitation frequency, the other is increasing the modal damp

    根據機械振動理論，在不改變分動器結構設計的條件下，採用兩種方法降低螺栓共振響應：一種是將彎曲模態頻率移出激勵頻帶；另一種是提高彎曲模態的阻尼比。
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