atoss888 wrote:
(1) 你說了這麼多. 開頭就說錯了, Euro Ncap 的ESC test就是在測試閃避...
在80km/h的速度下, 方向盤打到270度並使車身產生大於1.83米的橫向位移,以避開原車道的物件..
請看清楚再來說吧...
ESC test
你後續說的是ESC原理...我在說ESC的效能差異, 你在回ESC原理...有點牛頭不對馬尾.
...(恕刪)
(1)
看過了
"我在說ESC的效能差異" , 對不起,小弟真的看不懂何謂"效能差異"???下文是上面ESC test的聯結的內文, 當中也找不到這一句.
How is ESC tested?
ESC systems are assessed by performing a series of tests in which, steering and yaw behaviour can be simultaneously evaluated. These are called the “sine-with dwell” tests and are based on an actual double lane change manoeuvre. They are carried out at 80 km/h with sudden steering wheel rotations up to 270 degrees.
這句話是說它如何做, 所以這是實驗方法(Method) , 而不是結果( Result)
所以不能說是測試"閃避",這有語病,
而是經由方向盤左右動作,這個方法, 去測後面ESC ON 之後,所產生的結果
實際的文字,並沒有"閃避"一詞
A car will pass the “sine with dwell” test when it has met three criteria.
一輛車要通過“sine with dwell” 測試, 必需達成三個標準
The first criteria is the lateral, or sideways displacement, which must be more than 1.83m.
第一個標準,橫向位移必須大於 1.83 米
In other words, the sideways displacement must be sufficient to actually change lane as intended to avoid the object that was in your lane.
換句話說, ,當你想避開,在你車道上的物體, 橫向位移必需足夠大, 大到能準確變換車道,(車寬為1.83m)
In order to make the double lane change, the car must react to the steering input which is ensured by the ESC system and verified with the lateral displacement criteria.
為了變換雙車道, 車輛必須對ESC所確認的的轉向指令, 做出反應. 並符合橫向位移的標準 .
However, after the steering maneuver the car must stay stable. .
轉向操縱之後, 車輛必須是處於穩定不偏的狀態.
This is verified with two other criteria that determine the yaw-rate after the steering maneuver is completed.
這是要符合其它兩項標準, 以確認轉向操控後的" yaw-rate" 已經完成.
They may only be a small percentage of the maximum yaw-rate during the steering maneuver to ensure that the car will follow a straight path after the steering input.
在整個轉向操控,它們可能只是一個很小比例的"maximum yaw-rate"最大偏駛率, 以確保在輸入轉向指令後,車輛將能沿著直線前進.
要測試出的是這三個數字, 不是"閃避"
Lateral displacement (1.07s) 橫向位移
Stability criterion
Yaw rate ratio (1.00s) 偏駛率
Yaw rate ratio (1.75s)
以小弟個人的解讀 , 文章提到 "閃避" 的英文 ,只有 avoid the object that was in your lane 這句
在開宗明義這句
ESC systems are assessed by performing a series of tests in which, steering and yaw behaviour can be simultaneously evaluated
只說能模擬評估" 轉向 Steering 和 偏駛 Yaw 的表現" , 這和"閃避"有些差異
因為這個測試不是傳統,在地上放交通錐, 看能不能撞到, 它是看方向盤連續動作後,車身穩定度的表現.
它真的沒閃避什麼東西 , 它是利用 輸入轉向指令(左右轉方向盤) 之後, 去測下面三個數值
Lateral displacement (1.07s) 橫向位移
Stability criterion 安定性
Yaw rate ratio (1.00s) 偏駛率
Yaw rate ratio (1.75s) 偏駛率
最後這一句
to ensure that the car will follow a straight path after the steering input.
在輸入轉向指令後,確保車輛將能沿著直線前進.
FOCUS 最後是不是直線前進.
(2)
atoss888 wrote:
Focus 中途是有後輪打滑發生,但最後沒有失控, 車頭推回而且維持直線前進??? 你確定?..
..(恕刪)
確定, 影片最後, Focus 是直線前進的, 不是如前面幾樓貼過的, ESC OFF狀態下的那些車, 在繞圈圈
由NCAP ESC 的報告上
http://www.euroncap.com/results/ford/focus/2011/430.aspx
FOCUS
ELECTRONIC STABILITY CONTROL
(ESC) 3.0pts
ESP Pass
http://www.euroncap.com/results/lexus/ct200h/2011/431.aspx
CT200
ELECTRONIC STABILITY CONTROL
(ESC) 3.0pts
VSC Pass
兩車都是通過測試的Pass, 得分3.0pts , 分數也是一樣的 .
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