第五章 結論與未來工作
5.2 未來工作與建議
根據本研究之系統設計及研究結果,未來可針對以下部分最更深入探討:
(1) 增加滑差估測器於車輛動態控制器中:本研究之車輛運動模式是假設車輛 處於輪胎與地面未有打滑狀況發生的理想情況,因此本研究在計算車輛 動態時,是假設滑差為零,輪胎以純滾動方式在地面上前進,但在實際 車輛之運動狀態上,車輛會因不同路面狀況而產生不同的滑差影響行車 狀況,使煞車扭矩回充效率產生變化,因此需要將滑差估測器應用於車 輛分析模塊中,藉此提升駕駛性能。
(2) 將此煞車回充物理模型燒錄於電動車實車上進行行車測試:本研究之煞車 回充模組目前是將其燒錄至底盤動力計中進行驗證,並未將其燒錄至實 際車輛中探討其行車奘況,而為了要使駕駛者能有最佳之行車體驗,可 將此物理模型與實際電動車之行車控制系統結合,在實際之車道測試車 輛之行車型態並針對行車狀況修正系統參數。
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符號列表
符號 物理意義
A
f 迎風面面積BPR
煞車功率比C
d 風阻係數CMD
駕駛者命令D
air 空氣密度E
dis 電池放電能量E
drag 總阻力產生之能量E
reg 電池充電能量ERR
能量回收比F
brk 輪胎煞車力mech
F
brk, 作用在整個輪胎上之機械煞車力reg
F
brk, 作用在整個輪胎上之再生煞車力tot
F
brk, 作用在整個輪胎上之煞車力F
drag 總阻力F
drv 輪胎驅動力F
f 滾動阻抗力F
wind 風阻力g
重力加速度G
brk 煞車命令增益值G
mtr 馬達驅動扭矩命令增益值53
54
55
56
wind 風阻扭矩motor
馬達轉速inc motor,
馬達轉速步進值max , motor
最大馬達轉速min , motor