非突極機 的英文怎麼說
中文拼音 [fēitūjíjī]
非突極機
英文
nonsalient pole machine-
In research of controlling system about the switched reluctance motor system ( srd ), there are two prominent problems, one is that it is difficult to set up accurate mathematical model of srm due to serious nonlinearity caused by double - salient structure, the other is that the previous schemes of srd are always equipped with rotor position sensor, which determines the system ' s high speed performance, reliability and cost. as a result, how to detect the position of non - position sensor rotor has become one major direction in the study o f srd
其中較為突出的問題是： 1 ）由於sr電機的雙凸極結構，電機模型具有嚴重的非線性，使得建立sr電機的數學模型非常困難； 2 ）轉子位置傳感器的存在影響了電機控制系統的高速性能、可靠性和成本，所以研究無位置傳感器轉子位置檢測技術（或間接位置檢測技術）是開關磁阻電機系統（ srd ）系統研究的重要課題之一。Engine operating conditions cold be changed quickly and are very bad sometimes, such as : from suddenly cranking to driving in winter, acceleration to sudden torque demand. in the light of zero emission vehicles, in order to achieve better hot efficiency, maximum power, higher safety and best emission, engine controls become more and more difficult. automotive engines are typical nonlinear, time - delay, time - varying parameter systems
汽車發動機使用環境變化大，使用條件有時非常惡劣，從寒冷的冬天突然啟動進入行駛狀態，行駛過程中的突然加速，急劇的扭矩變化等等，在這樣的條件下，為了使其熱效率、輸出功率、行駛性、安全性和排氣清潔性處于最佳狀態，給汽車發動機的控制帶來了極大的困難，特別是零排放汽車排放標準的提出，對發動機控制提出了更高的要求。Because of the full target texture and the acute speckle of the microwave - imaging machine, especially for the single frequency, single look and single polarization sar images, it is very difficult to extract image characteristics in the image pixel level
Sar圖像地物分類技術的困難性主要源於微波成像的特殊機理和嚴重的相干斑干擾，使得基於圖像象素層的特徵提取非常困難。對單視單極化sar圖像而言，這個問題更為突出。When the " oil crisis and thus great demand for the newly developed thermostatic valves arose in the 1970s, heimeier was excellently prepared for the rapid market development with its modern production facilities
在70年代的「石油危機」中，對新開發的溫控閥需求非常旺盛，面對突如其來的市場變化， heimeier以其現代化的生產設施極其有效地滿足了市場需求。分享友人