open loop 中文意思是什麼
open loop
解釋
開放式信息模型-
According to the system technology require, adopting singlechip realize open loop digital control of hdclsm ; using v / f conversion and complex key - control method realize digital setting of system parameter, such as velocity ; using micro - stepping control insure the motor running more smoothly ; adopting debasing speed control method to eliminate the mechanical impact of distance termination effectively ; at the same time, analyzing main power circuits drive circuit and protect circuit of system, completing hardware design and facture and software programming and debugging ; at last, making a whole test in hybrid rotary step motor. the experiment result indicates that this control system reaches the qualities required and run smoothly also
根據系統技術要求，採用單片機實現了混合式直流直線步進電動機的開環數字控制；利用v f變換和復合鍵控方法實現了系統轉速等參數的數字設定；利用細分控制技術保證了電機運行的平穩性，並進行了波形分析和理論研究；採用單片機軟體降速控制策略解決直線步進電機行程末端的機械沖擊問題；同時對主功率電路、驅動電路和系統保護電路進行了分析，完成了硬體設計、製作和軟體編程、調試，最後在混合式旋轉步進電動機上進行了全面測試。 -
This control may be closed loop or open loop.
控制可以是開環的也可以是閉環的。 -
It is generally impossible to obtain the analytic optimal guidance law for complex nonlinear guidance systems of homing missiles, and the open loop optimal guidance law is often obtained by numerical methods, which can not be used directly in practice. the neural networks are trained off - line using the optimal trajectory of the missile produced by the numerical open loop optimal guidance law, and then, the converged neural networks are used on - line as the feedback optimal guidance law in real - time. the research shows that different selections of the neural networks inputs, such as the system state variables or the rate of los ( line of sight ), may have great effect on the performances of the guidance systems for homing missiles. the robustness for several guidance laws is investigated by simulations, and the modular neural networks architectures are used to increase the approximating and generalizing abilities in the large state space. some useful conclusions are obtained by simulation results
對于復雜的非線性導彈制導系統，很難求得其解析的最優制導律，只能求得開環的數字解，不能適用於具有時變不確定性的導彈制導系統.利用神經網路的學習和推廣能力，對開環的數字最優制導律進行離線的學習，作為閉環的神經最優制導律在線應用.研究分別選擇系統狀態變量和視線角速率等不同的神經網路輸入對制導系統性能的影響，以及各種制導律的魯棒性問題，並採用模塊化神經網路結構提高神經網路的學習和推廣能力，模擬結果得到一些有益的結論 -
This paper starts the research of the liquid floated pendulous accelerometer testing system according to the engineering. at first, this paper gives the brief introduction of the history and present status of accelerometer and its testing technology, the working principium and math model of the liquid floated pendu - lous accelerometer, and then, decides the binary width pulse force retrim loop as the design proposal of testing system, researches the transfer function of every part in the system emphasizly, analyses the stability of the whole accelerometer testing system from the angle of control theoretics by the open loop transfer function of system, and designed the correcting net, analyses the basal problems such as resolution, sampling restraint, precision and so on, designs the hardware testing circuits such as preamplification, band - pass filter, alternating amplifier, phase sensitive demodulatorn, pulse - width modulation, frequency scale circuit, moment current generator. finally, using the graphics program language labv - iew which is designed for testing field especially by ni accomplishes the solfware design of testing system, realized the testing functions
首先對加速度計及其測試技術的發展歷史和現狀，液浮擺式加速度計的工作原理和數學模型等作了簡要的介紹，然後確定了以二元調寬脈沖再平衡測試迴路為設計方案，並從控制理論的角度進行了分析，著重研究了系統中各部分的傳遞函數，利用系統開環傳遞函數分析了系統的穩定性，同時設計了系統的校正網路;分析了二元調寬脈沖再平衡測試迴路的解析度、采樣約束以及測試精度等基本問題，並按照系統分析的結果設計了包括前置放大、帶通濾波、交流放大、相敏解調、脈寬調制、頻標電路以及力矩電流發生器等測試系統各部分硬體電路，驗證了電路的正確性，最後按照測試系統的要求，採用了美國ni公司專為測試領域所開發的虛擬儀器工具? ? labview作為測試軟體開發工具，利用該圖形化編程語言完成了測試系統軟體部分的設計，實現了測試功能。 -
At first, the dynamic mathematic model is created in the light of the known dimensions and structure. then base on the mathematic model, dynamic analysis of the system is studied by drawing the open - loop bode diagram closed - loop bode diagram and step response curve using the analysis and calculating function of matlab. the influence factor on frequency character steady and performance of the system is also analyzed
首先，根據已確定的尺寸參數和結構需要，計算並建立起系統的動態數學模型，然後在已知系統數學模型的基礎上，利用matlab語言強大的分析計算功能，對系統進行動態分析，通過畫出系統的開環bode圖、閉環bode圖及系統的階躍響應曲線，分析了系統的頻率特性、穩定性及系統性能的影響因素。 -
Based on the study of transferring characteristics of the lcc - type resonant voltage, the parameter combinations, which make widths and magnitudes of voltage pulses of resonant network adjustable, arededucedo when the following requirements are met : fn > 3, k > 3 or cp / cs > 8, the above circuit is of natural voltage - stabilized characteristics, thus open - loop control method for bucking voltage is presented and the experimental results verify that the method is feasible.,
實測整機在額定負載時效率達到88以上。在研究lcc諧振網路電壓傳輸特性的基礎上，推導出滿足可變寬度和幅度的諧振網路輸出電壓脈沖列的參數組合。設計f n 3 、 k 3或c _ p / c _ s 8時，諧振網路具有自然穩壓特性，因此本文提出並實驗驗證了一種整機為降電壓時的開環控制策略。 -
This thesis make a study on vector - contorl wvf system of asynchronous motor. in the course of study, making use of the mathematical model of asynchomous motor in mt axes. then both open - loop control system and close - loop vector - control system are respectively simulated with simulation block simulink in matlab
本文對異步電動機變頻調速系統進行了研究，利用異步電動機在二相同步旋轉mt坐標系下的數學模型，使用matlab中的模擬工具箱simulink分別對開環控制系統和閉環矢量控制變頻調速系統進行了模擬。 -
Analysis and tests show that by using slope compensation, the open - loop instability, sub - harmonic oscillation, non - ideal closed - loop response and noise etc. when duly cycle above 50 %, can be reduced or eliminated
理論分析與試驗表明，通過引入斜坡補償可以抑制或消除占空比超過5 %時的開環不穩定性、次諧波振蕩傾向、不理想的閉環響應、噪聲等。 -
Thus, an open loop control scheme and a closed loop control scheme based on chopper system are introduced. lastly, a hardware and software design based on m icro - controller is presented
本文最後對基於斬波方式的三相交流異步電動機的軟起動方法給出了基於遠程監控的具體實現方案。 -
The study has completed the design of two - phase inverter and made up of the two - phase inverter - motor system for experimental use it is a variable frequency adjustable speed system with a open - loop control of rotational speed, which consists of voltage - controlled oscillator circulating assign device inverter circuit and two - phase induction motor a accurate mathematical model is set based on the whole system, and simulator program of dynamic and steady condition is established, which is used to calculate the dynamic and steady performance by kron and symmetrical coordinate converter by simulator calculation and experimental research with specific parameter of the system, a comparison is made between predicted and experimental characteristics, experimental measurements are shown to compare closely with corresponding theoretical result it is compared with some variable frequency adjus table speed system comprising inverter and single - phase induction motor from the system efficiency torque pulsation and the effect of two - phase inverter capacitance based on the conclusion, harmonic cancellation pulse width modulation control of a two - phase inverter - fed induction - motor drive system is researched, which cancelled the low harmonic and improve the system performance
通過對電機的kron變換和對稱分量變換，建立了系統較精確的數學模型，編制了系統動態及穩態運行的模擬計算程序分別計算系統的動態和穩態性能。通過對系統的具體參數進行了模擬運算和實驗研究，實驗和模擬結果進行比較，說明實驗和理論較為一致，並從系統效率、轉矩脈動及兩相逆變器電容的影響等方面與各種逆變器和單相異步電動機組成的變頻調速系統加以比較。在此基礎上，對兩相逆變器供電-異步電動機系統使用諧波抑制pwm控制進行了研究，由於減少了低次諧波，改善了系統性能。 -
It is readily acknowledged that open-loop systems can also be used satisfactorily in many cases.
我們仍然承認在許多時候使用開路系統仍有其獨到之處。 -
Open loop electronic balance
開環式電子天平 -
While tv signal is switched, scm outputs volume adiusting code with refference to default volume in a certain period to realize closed loop control of tv accompanyind sound, afterwards back to open loop control
當信號切換操作時，在一定時間內以默認音量值為參照，由單片機發出電視接收機音量調節編碼，實現電視伴音音量閉環調控，調控結束后恢復開環形式。 -
On the other hand, the function of the rough regulation is the same as the open loop system. the a / f controller adopts the approaching increment method in the smooth regulation and the pi controller for non - oscillation or stable increment method for low - speed oscillation in the micro - regulation
噴氣占空比粗調階段為對map圖執行取值操作；細調階段為執行增量逼近法的階段；微調階段為執行pi環節或執行低速振蕩微調。 -
Open - loop control
開放一個終端站 -
On the basis of these, a simplified iced aerodynamics model is established, describes the effects of aircraft icing on aerodynamic parameters. main principle and implement method of iced aircraft envelope protection system are proposed. after ascertain iced aircraft envelope, for pilot and autopilot, open - loop and close - loop aircraft envelope protection control law respective designed, ensure the aircraft will efficiently follow the flight path specified by the pilot in the safe - flight envelope
在此基礎上，建立了簡化的飛機結冰氣動模型，以描述結冰對氣動參數的影響;給出了結冰飛行包線保護系統的基本原理及實現方法，在計算確定結冰飛行包線后，對於人工駕駛、自動駕駛飛行兩種情況，分別設計了開環、閉環飛行包線保護控制律，保證飛機在安全飛行包線內沿著預定的航線飛行。 -
When considering this response it is convenient to look at closed-loop and open-loop control situations separately.
在研究這一反應時，分別觀察閉環和開環操縱情況是方便的。 -
Here the system is similar to open - loop control system
二階欠阻尼振蕩系統是系統中較為常見的控制系統。 -
Mine support ; graphical symbols for the open loop control of powered support
礦井支承.動力支承的開環控制裝置的圖形符號 -
The mathematic models of networked control systems with single packet transmission, multiple packet transmission or data packet dropout are developed when the network - induced delay is short time delay. the open - loop mathematic models of networked control systems with long time delay are developed when the system is driven by anyone of the four different modes. the uniformed modeling method for networked control systems with long time delay is proposed
建立了短時延網路控制系統在單包傳輸、多包傳輸以及有數據包丟失時的數學模型；建立了長時延網路控制系統在四種驅動方式下的開環數學模型，提出了長時延網路控制系統的統一建模方法；建立了多輸入、多輸出ncs的數學模型。
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