Re: [情報] KM77 BMW M235i xDrive 2020測試-68km/h

※ 引述《jimhu (胡小揚)》之銘言：
: https://youtu.be/oPeSQDffskc
: 影片先上
: 原本以為BMW+轎車成績應該有個75以上
: 結果沒想到是68....
: 最近好多車款成績都很慘阿....

ISO 3888: Passenger cars — Test track for a severe lane-change manoeuvre

Part 1: Double lane-change
https://i.imgur.com/fWUIGNK.jpg

Part 2: Obstacle avoidance
https://i.imgur.com/Qz9tjAu.jpg

km77的麋鹿測試就是ISO 3888裡的Part2，測試項目是Obstacle avoidance

也就是緊急閃避障礙物的能力好壞，但不是直接推論操控性

其中Track也會視車寬調整寬度，不會有大車就不利於測試的情況

其他的操控性相關還有

ISO 4138: Passenger cars — Steady-state circular driving behaviour
Method 1 — Constant-radius
Method 2 — Constant steering wheel angle
Method 3 — Constant speed
https://i.imgur.com/7qJsdgN.jpg

ISO 7401: Road vehicles — Lateral transient response test methods
(1) Step input
https://i.imgur.com/tavkfPZ.jpg

(2) Pulse input
https://i.imgur.com/w6soyII.jpg
(3) Sinusoidal input, one period (ISO/TR 8725)
(4) Random input (ISO/TR 8726)

ISO/TR 8725: Road vehicles —
Transient open-loop response test method with one period of sinusoidal input

ISO/TR 8726: Road vehicles —
Transient open-loop response test method with pseudo-random steering input

ISO 13674: Road vehicles —
Test method for the quantification of on-centre handling
Part 1: Weave test
Part 2: Transition test

ISO 17288:Passenger cars — Free-steer behaviour
Part 1: Steering-release open-loop test method
Part 2: Steering-pulse open-loop test method

其他還有Pylon Course Slalom Test(GB/T6323.1或CNS 9244 D3131)
https://i.imgur.com/8exGDCm.jpg

以及J-Turn, Fishhook等測試項目
https://i.imgur.com/kUVPiRU.jpg
https://i.imgur.com/BcJ8s9U.jpg

GB/T與操控相關測試項目
https://i.imgur.com/k9PGXjI.png

也就是說，操控性評定是許多獨立測試項目的綜合結結果

不是單單只看其中一項

最常拿來參考性能車的指標是最大側向G值(ISO 4138)和slalom
https://i.imgur.com/r57PtQ8.jpg

ISO 3888這項測試則是針對"急遽變換車道"下的車輛響應

由於車上循跡介入控制程度高，常被拿來比較車輛動態控制的優劣

Adaptive Robust Vehicle Motion Control for Future Over-Actuated Vehicles
https://reurl.cc/j7GdQq

動態控制好壞會受控制器頻率影響
https://i.imgur.com/GRhey2x.jpg

lateral velocity control
https://i.imgur.com/PKHMm5U.jpg

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※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 114.137.218.233 (臺灣)

殺彎直接看最大側向G值 yaw rate跟轉向暫態下的響應比較有關(循跡很重要的一個參數)

※ 編輯: chandler0227 (114.137.218.233 臺灣), 08/05/2020 10:51:23