汽車電動助力轉(zhuǎn)向系統(tǒng)特性研究

建立電動助力轉(zhuǎn)向系統(tǒng)的力學(xué)模型,并對系統(tǒng)電動機在比例控制和比例加微分控制下汽車
電動助力轉(zhuǎn)向系統(tǒng)特性進行分析,對系統(tǒng)的頻率特性和時間響應(yīng)進行數(shù)值仿真,分析比例系數(shù)和微分系數(shù)對系統(tǒng)特性的影響,研究參數(shù)變化下系統(tǒng)特性的變化規(guī)律,為優(yōu)化控制規(guī)律提供依據(jù)。
關(guān)鍵詞:汽車;電動助力轉(zhuǎn)向;系統(tǒng)特性;理論分析
Abstract :A mechanics model of elect ric power steering ( EPS) system is set up in this paper1 The characteristics of EPS are analyzed in theory1Under the case that EPS motor is in the cont rol of a pure proportion cont roller and pro2 portion2plus2derivative cont roller. The f requency response and time response of the system are numerically simula2 ted1 The authors also consider the effect s of the proportional and derivative coefficient s to EPS , study the variational rule of the system property on the effect of variation of the coefficient s , and provide basis for optimizing the cont rol law1
Key words :Vehicle ; EPS ; System characteristic ; Theoretical analysis