open-loop system 中文意思是什麼
open-loop system
解釋
開環系統-
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。 -
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。 -
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。 -
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。 -
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。 -
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。 -
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。 -
Discussing the influence of the electrostatic force upon the system function making good use of this electrostatic force, we can design to open - loop system and closed - loop servo system
討論了靜電力對系統性能的影響，合理利用靜電力可以設計出開環和閉環控制系統。 -
In conclusion, some inherent rules and relations of motion stability of the open - loop system and the driver - vehicle closed - loop system are revealed in this paper. the results of simulation and optimization about the open - loop system and driver - vehicle close - loop system indicate the index and the method presented are right and valuable
研究結論表明，所提出的汽車開環和閉環系統加權綜合評價指標和總評價指標可以用於汽車開環系統和閉環系統操縱性和運動穩定性的聯合優化設計，從而改善汽車的操縱性和運動穩定性。 -
The open - loop system is normally used in simple point - to - point, or positioning systems, although improvements in technology have made it possible to install the system in contouring systems as well
雖然技術的進步已使等值線系統安裝在系統中成為可能，但開環系統通常只在簡單的點對點或配置系統中應用。 -
In section 2. 6, we show the open - loop system ( 1. 1 ) - ( 1. 3 ) is exactly observable. this provides us with an effective method to study the stability of non - dissipitiwe flexible beam systems with boundary feedback
縱觀第二節到第五節，它為我們今後研究非耗散邊界反饋彈性梁振動系統的穩定性提供了一個非常有效的方法。 -
By the simulation of the vehicle open - loop system, using complex method matches the vehicle structure parameter. 3. based on the handling and stability evaluation indexes of the driver - vehicle close - loop system, a new combinatory evaluation index about handling and stability is presented
3 .在已有的閉環系統操縱性評價指標和運動穩定性評價指標的基礎上，提出了汽車閉環系統操縱性和運動穩定性的加權綜合評價指標，並考慮到各種車速的重要性而提出了一個總評價指標aclose 。 -
The linear vehicle open - loop system and driver - vehicle close - loop system is studied in this paper. a new combinatory evaluation index about handling and stability of open - loop and close - loop system is presented. further more, the handling and stability of the open - loop and close - loop system is combined to optimize
論文深入研究了汽車開環系統和駕駛員?汽車閉環系統的操縱性和運動穩定性，分別提出了汽車開環和閉環系統操縱性和運動穩定性的加權綜合評價指標，並分別對汽車開環和閉環系統操縱性和運動穩定性進行了聯合優化設計。 -
The main purposes of this paper are : 1. based on the handling and stability evaluation indexes of open - loop system, a new combinatory evaluation index about handling and stability is presented. further more, a general evaluation index aopen is presented in order to considering the importance of the different speed
論文的主要工作如下: 1 .在已有的汽車開環系統操縱性評價指標和運動穩定性評價指標的基礎上，提出了汽車開環系統操縱性和運動穩定性的加權綜合評價指標，並考慮到各種車速的重要性而提出了一個總評價指標aopen 。 -
As an electromechanical element, which can transform digital electrical pulse signal into mechanical angle displacement, the stepper motor takes the advantage that it can work well in the open loop system, and is widely used in different kinds of control system
作為一種將數字式脈沖信號轉換成機械角位移的機電執行元件，步進電機的主要優點是能在開環系統中較好地工作，因此，它作為驅動元件廣泛地應用於各種控制系統中。 -
The task in the open loop system is to get lpg injection duty ratio in pre - set two dimension map according to practical engine operation condition, while the task in the closed - loop system is to calculate lpg injection duty ratio by the approaching increment method or the proportion and integral ( pi ) controller according to the signal of the oxygen sensor. to eliminate the oscillation phenomena of the signal of the oxygen sensor in low - speed condition, this paper develops the stable increment method
開環階段根據實時工況參數對事先制取的噴氣占空比map圖執行取值操作；閉環階段根據氧傳感器反饋信號通過增量逼近法或pi環節計算輸出適合即時工況的噴氣占空比值；為解決低速振蕩現象，本文運用固定增量法，對系統進行低速振蕩微調。 -
In this paper, for the first time, it is proved that oct is an open loop system, so that the adaptive optical transducing principle on independent variables and the solenoid collecting magnetic field optical transducing principle are presented. based on the above two principles, the methods are gained to improve the precision and stability of oct, and the new adaptive optical current transducer ( aoct ) had been developed
本論文在深入研究oct的原理、結構和運行特性的基礎上，首次在理論上證明了oct是開環系統，並首次提出了獨立量自適應光學傳感原理和螺線管聚磁光學傳感原理，進而得到了提高oct測量精度和長期運行穩定性的有效方法…光電獨立量自適應光學傳感原理和螺線管聚磁光路結構，並以此研製成功了新型的自適應光學電流互感器（ aoct ） 。
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