frequency constraint 中文意思是什麼

frequency constraint 解釋
頻率約束
  • frequency : n. 1. 屢次,頻仍,頻繁。2. (脈搏等的)次數,出現率;頻度;【物理學】頻率,周率。
  • constraint : n. 1. 強迫,拘束。2. 約束,壓抑,拘泥。3. 強制力。4. 緊張感[狀態]。
  1. After analyzing the switching characteristic of mosfet, the object function of optimizing curve of the output capacitance coss is confirmed according to the switching loss caused by output capacitance coss, then the optimized curve of the output capacitance coss is ascertained by applying zoutendijk to seek the optimized value with constraint ; the simulation of switching circuitry and dc - dc circuitry is tested at different frequency in pspice, then the least square method is adopted to fit simulation curves to calculate corresponding energy data

    在電子線路模擬軟體pspice中進行了mosfet開關電路以及典型dc dc轉換線路模擬測試,針對不同頻段的測試結果,採用最小二乘擬合法對模擬曲線進行擬合,計算出相應的能量數據,最後綜合模擬結果確定出減小器件開關損耗,提高dc0c轉換線路效率的器件輸出電容cob優化曲線。
  2. Topology optimization of truss structures with frequency constraint based on structural reliability

    具有頻率約束的桁架結構可靠性拓撲優化
  3. To avoid high frequency oscillation in the course of autopilot design, damping coefficient value was treated as a constraint, the rise time was taken as objective, and the other performance criteria were taken as constraints, then the robustness design problem was solved by multi - objective optimization method

    摘要在導彈控制系統設計過程中,考慮了自動駕駛儀的高頻振蕩問題,將其轉化為系統的一個約束條件,同時把上升時間轉化為目標函數,其他設計指標視為約束條件,採用有約束多目標優化的方法解決了系統魯棒性設計問題。
  4. Simulations with respect to two models, prove that the method can track the frequency accurately and instantly, and have the preferable effectiveness on the abruptly fluctuating - frequency power signals, at the same time, this method overcomes the constraint of synchronous sampling and has the better astringency with different initial frequency

    針對兩種模型進行模擬,表明該方法能夠較為精確與快速地跟蹤電網頻率,尤其針對突變頻率的信號,具有較好的跟蹤效果;同時演算法克服了同步采樣條件的限制,通過迭代,在不同初始頻率下均具有較好的收斂性。
  5. Furthermore, the constraint condition of the transfer function at the zero frequency and the phase invariability condition of transfer function are presented

    與傳遞函數極點的理論關系,得到了傳遞函數低頻約束條件和傳遞函數相位不發生畸變的補充條件。
  6. The innovative ideas in this paper are that robust h control theory based on conventional ip controller is applied to the high - precision feed of a single axis, and the controlled plant is composed of ip velocity loop and two - order model of linear motor. a constraint condition on y in the problem of h2 / h is deduced from the frequency criterion of riccati equation, which makes the repeated computation on r simple. considering the two - loops control problem, the h state feedback controller based on ip controller as the inner controller is applied to satisfy the velocity performance of the system, and a pi controller, the external controller, is used to satisfy the position performance

    本文的創新之處在於將傳統的ip速度控制器和直線電動機的二階模型作為一個廣義的被控對象,利用魯棒h _控制理論設計了一個h _狀態反饋控制器,以此解決高精度進給的控制問題,並在此基礎上研究了h _ 2 h _混合控制問題,結合h _代數riccati方程正定鎮定解存在的頻率判據,推出了一個控制器存在的約束條件,使以往須反復試探的,有了更進一步的約束范圍,簡化了計算。
  7. The theoretic analysis based on body dynamic constraint lays a foundation for further engineering researches which are shown as follows : 1. different characteristics of the railway track surveying system and the attitude reference system for fire control are analyzed. the body dynamic constraint conditions in frequency domain are derived for these two applications

    基於載體動態約束信息的理論分析為以下工程問題的進一步研究奠定了基礎: 1 、論文分析了列車軌道測量以及某火控系統姿態參考問題的不同特點,分別推導了相應的載體運動頻域約束條件。
  8. In the wavefield - spread area, we uses the phase - shift operator as constraint in frequency - wavenumber field, while beyond the wavefield - spread data, we uses zero point at the ends of phase - shift operator as constraint to take discrete smooth interpolation so that the resulted operator satisfies two - order smooth and the length of this operator can be selected shorter in frequency - space field

    通過離散光滑插值法,在頻率波數域中,以傳播區內的相移運算元為約束,在傳播區外的運算元兩端處以零點為約束,進行離散光滑插值,使得所得運算元具有二階光滑可導性,則其對應的頻率空間域中的運算元就可以取得很短。
  9. The main research is as follows : analyze and research the boundary constraint and the structure characteristic and segment the frame making use of the shell element, the pipe element etc. on the base of it the practical finite element model has been established ; analyze the mode of the frame by dint of the finite element model. and get the inherent frequency and the vibration mode of the frame. tentatively estimate the dynamic characteristic of the frame and analyze the inherent frequency that may be lead to the resonance

    論文的主要研究工作如下:分析研究車架的邊界條件和結構特性,並用殼、管等單元對該車架進行離散,建立一種切實有效的車架有限元模型;對該車架的有限元模型進行模態分析,求得其的固有頻率和振型,並對車架的動態特性做出初步評估,分析可能引起車架振動的固有頻率;在模態分析基礎上,研究發動機輸出的簡諧力引起的車架位移響應(即諧響應分析) ,以考察摩托車車架各部位的振動情況並與模態分析對比,分析是否與該車架的固有頻率相耦合而導致共振;在深入研究車架的模態分析及諧響應分析、清晰地認識了摩托車車架動態特性的基礎上,分析並提出了採用橡膠減震器對車架進行隔振的減震方法。
  10. The algorithm of economic power dispatch, which considers the constraint condition of network loss and frequency variation, is studied, and a pragmatic and effective method of frequency control is put forward, and the marginal cost is analyzed

    本文研究了計及網損和頻率變化率約束條件的有功功率經濟分配的演算法,提出了一種實用有效的頻率控制方法並對邊際成本進行了分析。
  11. A new approach to truss topology optimization, i. e topology group concept, is introduced. it may consider many kinds of constraint, including stress, euler buckling, static displacement and frequency constraints

    提出了桁架結構拓撲優化設計的一種新方法?拓撲組方法,可同時考慮應力,失穩,靜動位移響應以及固頻約束。
  12. On the other hand, we give the condition of correctly solving range ambiguity and performance calculating formula of for stagger frequency difference ; condition of constraint for deciding stagger parameter value ; range " s analysis result for targets with multiple scattering centers or low altitude. this part includes chapter 2, 3, 4, 5

    另外,我們還給出了參差比相測距正確解模糊的條件以及參差測距下的性能公式;提出了決定參差參數取值的約束條件;給出了多散射中心目標和低空目標的多頻連續波測距性能的結論。
  13. The character of the constraints ( i. e., the feasible domain of the constraints ) is analysed in this paper. an important conclusion is that the feasible domain of frequency constraints is no convex, while the others are convex. therefore, the frequency constraint is the key constraint for the existence of the solution

    對結構優化設計的約束的性質(即約束的可行域)進行了分析,得出了固頻約束的可行域是非凸集,其餘約束的可行域是凸集,固頻約束是決定優化解是否存在的關鍵約束等有益結論; 3
  14. The optimal model of truss structure is established, in which the cross sectional areas of bar are taken as design variables, the structure weight is taken as objective function. in the process, the reliability of structural displacement and bar stress and the fundamental frequency are taken as constraint functions. from the engineering practice, all the reliability constraints, which are implicit generally with the design variables, are equalized and transferred to the conventional explicit constraints

    本文將主要考慮桁架結構的優化問題,首先建立數學模型,即以桁架的橫截面積為設計變量、以重量最小為優化目標,位移、應力等可靠性及基頻為約束條件;最後,從工程實際出發,對結構系統的可靠性隱形約束進行等價顯化處理,使之轉化為常規的橫截面積優化問題。
  15. The content can be outlined as follows : the introduction of broadband beamforming, the study of a robust broadband generalized side lobecanceller ( gsc ), the discussion of an integral constraint beamforming based on subband processing. the broadband beamforming can be designed in time domain or frequency domain

    內容包括:寬帶波束形成器的時域處理的介紹,一種穩健的寬帶旁瓣對消器;基於子帶處理的積分約束的波束形成器的設計;並在文中簡述了寬帶波束形成器時域處理以及頻域處理的優缺點。
  16. Meanwhile, there is a kind of constraint, only the frequency constraint. the optimization design is computed to increase the first mode frequency. as the results, the first mode frequency is increased and the amplitude of the arm frame is cut down

    選擇比值較大的結構參數為設計變量,以一階頻率為性能約束,進行了旨在提高一階固有頻率的優化設計,提高了泵車的一階固有頻率,使一階固有頻率盡可能高於油缸沖擊載荷的頻率,從而減小泵車臂架系統的振動幅度。
  17. The solution existence for dynamic topology optimization of truss is explored from the engineering point of views : when the design variables ( section areas ) are continuous and their bound are not imposed, if there is no frequency constraint, the optimal solution always exists for a given optimization problem and contrarily, when the frequency constraint is considered, the frequency will become the key constraint and also the solution existence will be changed by the topology alteration

    從一般工程意義上探討了桁架結構動力學拓撲優化設計解的存在性:無固頻約束時,設計變量連續且不考慮上限約束,則優化問題總是有解;考慮固頻約束時,頻率約束是是否有解的關鍵約束,並且改變結構拓撲形狀可以改變解的存在性。
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