switching variable 中文意思是什麼
switching variable
解釋
交換變數-
How to vary the two variable quantity of the buck - boost basic circuit on the high frequency switching and whether or not their varying laws are fit for their theoretical conclusion
高頻開關下的buck - boost電路中各個變量的動態變化如何，其變化規律是否與理論上的推導一致。 -
A multiple - model ( mm ) estimator with a variable structure ( vsmm ), called model group switching ( mgs ) algorithm, could track the targets with complicated movement
摘要在變結構多模估計當中，有一種演算法稱之為模型組轉換演算法，其可以用於跟蹤運動規律較為復雜的目標。 -
With the development of the converter drive technology, the requirement for the variable frequency drive are becoming more and more strict especially for the modern converter drive employing fast switching semiconductor igbt ， though it has high pulse frequency and refreshing time of only nanoseconds, it generates emf that has adverse effect on the environment
隨著頻率控制傳動技術的發展，對頻率變速傳動系統的要求越來越高，尤其是對採用快速切換的igbt半導體現代變頻技術，盡管脈沖頻率高或更斷時間僅毫微秒內，但它們會對周圍環境產生電磁場。 -
There are five parts are as follows : in part one, the concept of switching function is introduced first to establish the nonlinear mathematical model of the induction motor variable frequency speed adjustment system which is fed by a sine pulse width modulated ( spwm ) inverter and takes the effect of the main magnetic circuit saturation into consideration, then the low frequency oscillation of the system is simulated according to the model. next, from the view point of energy conversion of the inverter - induction system, a criterion for the low frequency oscillation is proposed to determine whether the system is in low frequency oscillation which is judged by whether the interval of the negative current component of the inverter input current is more than 1 / fc ( fc is the carrier wave frequency of the inverter ) or not
首先引入開關函數概念，建立了正弦脈寬調制（ spwm ）逆變器供電異步電動機，考慮主磁路飽和時的變頻調速系統整體數學模型，模擬系統的低頻振蕩；其次從逆變器-異步電動機系統能量轉換角度出發，提出通過檢測逆變器輸入電流中負電流的間隔時間是否大於1 / f _ c （ f _ c為逆變器載波頻率）來判定系統是否出現低頻振蕩；最後的實驗結果驗證了系統低頻振蕩建模和判據的實用性和正確性。 -
Considering the system ' s wide speed range and ipm ' s switching frequency ' s top limit, the variable flux linkage locus structure control has been executed in the full speed adjusting range
考慮到系統調速范圍寬和逆變器開關頻率的限制，在全頻域採用分段變磁鏈軌跡結構的控制方法。 -
Based on optimal control theory and singularly perturbed theory, a singularly perturbed midcourse guidance law that guarantees air - to - ground missiles to ascent quickly is proposed. this new guidance law is a composite control law consisting of three parts : optimal climbing control using variable weighting factor method, minimum energy cruising phase control and minimum energy switching phase control. moreover, a new control logic is designed in order to remove influence of climbing control on switching phase. simulation results of a certain type of air - to - ground missile are presents. it is shown that, with simple control algorithm and feasible onboard implementation, this law not only guarantees air - to - ground missiles to ascent quickly, but also satisfies the requirements of midcourse phases. the studies have important theoretical meaning and great value of engineering application
為滿足實際作戰的要求，基於最優控制理論和奇異攝動方法，提出了一種可保證中遠程空地導彈快速爬升到最優高度的中制導律.它由變系數最優爬升控制，最小能量巡航控制和最小能量下滑控制組成.為了減小爬升段控制對下滑段的影響，提出了一種新的控制邏輯.最後針對某型空地導彈進行了模擬.結果表明，該中制導律較好地滿足了中遠程空地導彈在中制導段的要求.本文的研究結果具有較好地工程參考價值 -
Abstract : based on optimal control theory and singularly perturbed theory, a singularly perturbed midcourse guidance law that guarantees air - to - ground missiles to ascent quickly is proposed. this new guidance law is a composite control law consisting of three parts : optimal climbing control using variable weighting factor method, minimum energy cruising phase control and minimum energy switching phase control. moreover, a new control logic is designed in order to remove influence of climbing control on switching phase. simulation results of a certain type of air - to - ground missile are presents. it is shown that, with simple control algorithm and feasible onboard implementation, this law not only guarantees air - to - ground missiles to ascent quickly, but also satisfies the requirements of midcourse phases. the studies have important theoretical meaning and great value of engineering application
文摘:為滿足實際作戰的要求，基於最優控制理論和奇異攝動方法，提出了一種可保證中遠程空地導彈快速爬升到最優高度的中制導律.它由變系數最優爬升控制，最小能量巡航控制和最小能量下滑控制組成.為了減小爬升段控制對下滑段的影響，提出了一種新的控制邏輯.最後針對某型空地導彈進行了模擬.結果表明，該中制導律較好地滿足了中遠程空地導彈在中制導段的要求.本文的研究結果具有較好地工程參考價值 -
The system selects switching surface according to the approach of variable structure control. based on the control rules to design the variable structure controllers, the inner loop and the outer loop form a complete vsc control loop. the control system has switching surface and the system brings sliding along fixed desired trajectories
根據滑模變結構控制方法選擇切換面，根據控制律，設計變結構控制器，使內環和外環合成為一個vsc控制器，系統的控制有切換，而且在切換面上系統將會沿著固定的軌跡產生滑動運動。 -
People can easily design the hysteresis current control hardware circuit, but the switching frequency is variable which makes us difficult the design the output filter, moreover the output waveform is not good. the space vector modulation techniques, by selecting the zero vector properly, it can reduce the harmonic content of the output voltage, so it has become a popular control method
滯環電流控制的硬體電路設計簡單，但存在開關頻率不固定，輸出濾波器設計困難，輸出波形質量差，空間矢量控制（ svm ）技術具有較高的電壓利用率，且通過對零矢量的合理控制可以降低諧波含量或降低開關損耗，因此是一種較好的控制方法。 -
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。 -
So we studied a special structure of crossbar in this thesis, which was called as the buffered - crossbar that can support the switching of variable length packets directly
因此，本文將研究一種特殊結構的crossbar交換背板技術? ?具有節點緩存能力的crossbar結構，以支持對變長分組的直接交換。 -
The pps also has some drawbacks, such as it can not provide qos guarantee, data can not remain the right order after switched by different switching panel. at the same time, people show interested in the variable - length packet switching
但是多平面交換帶來的另外的問題，如無法對qos提供很好的保證，出口端的數據包由於經過不同的交換平面的處理，難保證按照順序到達出埠。 -
We want to use novel switching algorithm that help us make the variable - length switching efficient. we do not need to cut the variable - length packet into fix cell as the traditional switching algorithm. in this paper, we suggest to use pps for the variable - length packet switching
另外一方面人們對支持變長數據包的交換演算法有很大的興趣，傳統的切割變長數據包成為定長信源，在重新組合變長數據包的交換演算法降低了變長交換的效率。 -
Chapter iv summarizes all kinds of dimming methods and studies the characteristic of the lamp under dimming. experimental results of variable switching frequency scheme and variable voltage scheme are provided to analyze their strongpoint and drawbacks
論文第四章對各種調光方法進行了綜述，研究了調光工作下燈的工作特性，並對最常用的調頻調光和調壓調光進行了實驗研究，分析了各自的優缺點。 -
Second, at the multiplexers there must be additional schemes to reconstruct the original packet from the cells. and the delay time of the last cell of the packet will greatly influence that of the original packet. we propose the de - multiplexer and the multiplexer algorithms in the architecture of parallel packet switches ( pps ) which support the variable - length packet switching
文章給出了一種多平面交換的輸入端分發演算法，支持變長數據包的分發，同時也給出了輸出端復接的演算法，可以進一步減少數據包的時延，提高多平面交換的效率。 -
In contrast to other variable control methods, variable structure terminal sliding mode control ( vstsmc ) avoids local sliding mode existing on each switching hyper plane. therefore, the system states can enter terminal sliding mode directly with desired dynamic characteristics
變結構最終滑動模態控制（ variablestructureterminalslidingmodecontrol ） （ vstsmc ）方法與其它滑動模念變結構控制方法相比，避免了在各個切換超平面上存在局部滑動模態的情況。 -
Short packet first scheduling for variable length optical packet switching
可變長光分組交換的短包優先調度 -
By combining the electrochemical and optical properties of these two electrodes, a general variable transmittance function suitable for describing the switching characteristics of complementary ecds is developed
經由結合兩電極之電化學及光學性，可推導出一適當的穿透率方程式以描述互補式電致色變元件特性的轉變。
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