In order to understand the lamp ' s negative incremental impedance of characteristics and analyze the stability of ballast / lamp system clearly , the low - frequency ballast system stability with closed loop are analyzed based on the hid lamp frequency - domain model in chapter ii 為了更好地理解燈的負(fù)阻特性并分析電子鎮(zhèn)流器系統(tǒng)的穩(wěn)定性問題,論文第二章著重從燈的頻域模型出發(fā)分析了閉環(huán)控制下的低頻方波電子鎮(zhèn)流器系統(tǒng)的穩(wěn)定性問題。
This dissertation puts forward an accurately modeling approach . these two kinds of interferences have different sources and spreading path . their simple time - domain model and frequency - domain model are built in this dissertation too , which provides theory foundation for qualitative and quantitative emi analysis 功率變換器的傳導(dǎo)emi以差模干擾和共模干擾兩種模式存在,在對(duì)器件和pcb板高頻建模的基礎(chǔ)上,本文提出了建立差模干擾和共模干擾的精確的時(shí)域電路模型的方法和步驟。
The mrf machine servo system decides the machining accuracy , surface quality of the work - piece and productivity . in this paper , the model of servo system transfer function is established by analyzing the structure of servo system and the system model parameter is obtained by using frequency - domain model 本文以磁流變拋光機(jī)床的伺服進(jìn)給系統(tǒng)為研究對(duì)象,通過對(duì)伺服進(jìn)給系統(tǒng)的結(jié)構(gòu)分析,建立了伺服進(jìn)給系統(tǒng)的傳遞函數(shù)模型,并運(yùn)用頻域建模的方法得到了系統(tǒng)模型參數(shù)。
According to the research of the medium - voltage power line transmission characteristics and frequency - domain modeling of bottom up mode that is to accquire characteristic parameters by theoretical calculation , the characteristic modeling of medium - voltage power line is established , and the suitable parameters which can restrain the signal attenuation is gained 本文首先通過對(duì)中壓電力線傳輸特性的研究,利用從下往上的頻域研究模式,即通過理論計(jì)算獲得特征參數(shù),建立了中壓電力線傳輸信道特性模型,推出了符合中壓電力線傳輸函數(shù)變化的參數(shù),可以有效地抑制信號(hào)衰減。