crossing loop 中文意思是什麼
crossing loop
解釋
會讓線-
Because the traffic volume in beijing city incessantly rises in recent years, and will continue to rise in future, in order to solve the travel difficulty and to reduce trip time, many loop roads and expressways are built. it is convenient for long - distance traffic, but it is a disadvantage to block - to - block traffic. due to expressway ' s separation from arterial roads, considerable traffic bypass into the grade - crossing intersection under the flyover, and lead to the traffic jam
由於北京的交通量在近幾年持續增長，並在今後一段期繼續保持增長態勢，為了解決行車難，旅行時間長的問題，北京在修建了大量的環路和快速路，分隔了次幹道和支路與主路的便捷聯系，使得很多其他繞行交通走行在跨線橋下形成的環路輔道與主要幹道相交的平面交叉口，也使得此類交叉口交通壓力非常大，從交通構成來看，進口轉彎交通量比例也很大。 -
This topic discusses the back - emf zero - crossing detection, the method of phase judging and compensation in detail. in order to improve the speeding performance we adopt the digital closed - loop speed control strategy
詳細介紹了反電動勢過零檢測、相位判斷及相位補償的原理及實現方法，並且為了在較寬范圍內提高bldcm的調速性能，採用了數字式轉速閉環控制。 -
In the system, control unit accomplishes back - emf zero - crossing information reading and closed loop commutation. the system eliminates the pwm interferences and the commutating interferences by filtering with software algorithm. in order to make the bldc commutate exactly, the method of three - point estimation is used for phase locking in the system. the system also accomplishes several important objects, such as tmppt of photovoltaic arrays, unmanned supervision of the system, fault detection etc. the results of the experiment show that the device, which is made on the base of the principle above, can control the motor to complete the exact commutation
系統以motorola單片機jl3為核心，完成了系統外圍硬體電路和控制軟體設計，實現了直流無刷電機反電勢過零檢測，利用軟體濾波的方式消除了pwm波干擾及換相干擾；採用三點預估演算法，進行相位鎖定，以完成直流無刷電機準確換相；同時實現了光伏陣列工作點的tmppt跟蹤、系統無人監控和故障檢測等功能。
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