JP2016088180A - 車両の走行制御装置 - Google Patents
車両の走行制御装置 Download PDFInfo
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Abstract
【解決手段】走行制御部10は、自動運転制御を実行するが、走行環境情報取得の異常を検出した場合、ドライバの運転操作がない際には、走行環境情報の取得が異常になる前の最後に検出した走行環境情報と走行情報とに基づいて自車両を路側に退避させる進行路を目標進行路として設定して自車両を路側に自動運転で退避させる退避制御を実行すると共に、物体センサ12を起動して、該物体センサ12で自車両周辺の物体を検出した場合には、物体センサ12からの情報と走行環境情報の取得が異常になる前の最後に検出した走行環境情報と走行情報に基づいて退避制御を実行する。
【選択図】図2
Description
ここで、Wrは道路幅、Wbは車体幅である。
また、前方道路が、図7(b)に示すような、合流路の場合、自車両が合流路の路肩に寄せて退避できるように、車線変更幅Wを、例えば、以下の(3)式により算出する。
更に、前方道路が、図7(c)に示すような、その他直線路等の場合、自車両がその他直線路等の路肩に寄せて退避できるように、車線変更幅Wを、例えば、以下の(4)式により算出する。
尚、上述の車線変更幅Wの設定は、左通行車線を例に説明したものであるが、右通行車線においても左右を逆に読み替えることで、同様に設定できる。
この(5)式を微分処理し、以下の(6)、(7)、(8)式を得る。
d2y/dx2=60・(2・x3−3・x2+x)・・・(7)
d3y/dx3=60・(6・x2−6・x+1)・・・(8)
そして、上述の(8)式により、d3y/dx3=0となるときのxを逆算すると、以下の(9)式が得られる。
このxの値から、(7)式により、d2y/dx2を算出して、この正規化曲率値を横加速度の最大値の絶対値|(d2y/dx2)max|とすると、以下の(10)の値を得る。
また、上述の横加速度の最大値(d2y/dx2)maxを用いて、車線変更時の最大横加速度(d2Y/dt2)max_c(予め設定する値)を表現すると、車線変更に要する走行距離をLyとし、車線変更幅をWとして以下の(11)式となる。
・・・(11)
この(11)式を走行距離Lyについて解くと、以下の(12)式が得られる。
・・・(12)
また、推定される自車両のx方向の正規化した走行距離をxeとすると、
xe=(∫V・dt)/Ly ・・・(13)
となる。目標ヨーレートγtと車速Vと横加速度(d2y/dx2)の関係は、以下の(14)式で表されるため、目標ヨーレートγtは、前述の(7)式を用いて、以下の(15)式となる。
γt=60・(2・xe3−3・xe2+xe)・W・V/Ly2
・・・(15)
この目標ヨーレートγtを、以下の目標ハンドル角θHtの関係式((16)式)に代入することにより、制御に必要な(ステアリング制御装置23に出力される)目標ハンドル角θHtが求められる。
ここで、nはステアリングギヤ比であり、Gγはヨーレートゲインであり、ヨーレートゲインGγは、例えば、以下の(17)式により算出できる。
ここで、lはホイールベース、Aは車両固有のスタビリティファクタで、例えば、以下の(18)式により算出される。
・・・(18)
ここで、Kfは前輪のコーナリングパワ、Krは後輪のコーナリングパワ、lfは前軸−重心間距離、lrは後軸−重心間距離である。
10 走行制御部(退避制御手段)
11 周辺環境認識装置(走行環境情報取得手段、環境情報取得異常検出手段)
12 物体センサ(自車両周辺物体検出手段)
13 走行パラメータ検出装置(走行情報検出手段)
14 自車位置情報検出装置(走行環境情報取得手段)
15 車車間通信装置(走行環境情報取得手段)
16 道路交通情報通信装置(走行環境情報取得手段)
17 スイッチ群
21 エンジン制御装置
22 ブレーキ制御装置
23 ステアリング制御装置
24 表示装置
25 スピーカ・ブザー
Claims (5)
- 自車両が走行する走行環境情報を取得する走行環境情報取得手段と、自車両の走行情報を検出する走行情報検出手段とを備え、上記走行環境情報と上記自車両の走行情報に基づいて自動運転制御を実行する車両の走行制御装置において、
上記走行環境情報取得手段とは異なる、自車両周辺の物体を検出する自車両周辺物体検出手段と、
上記走行環境情報取得手段の異常を検出する環境情報取得異常検出手段と、
上記走行環境情報取得の異常を検出した際には、上記走行環境情報の取得が異常になる前の最後に検出した走行環境情報と上記走行情報とに基づいて自車両を路側に退避させる進行路を目標進行路として設定して自車両を路側に自動運転で退避させる退避制御を実行すると共に、上記自車両周辺物体検出手段を起動し、上記自車両周辺物体検出手段で自車両周辺の物体を検出した場合には、該自車両周辺の物体情報と上記走行環境情報の取得が異常になる前の最後に検出した走行環境情報と上記走行情報に基づいて上記退避制御を実行する退避制御手段と、
を備えたことを特徴とする車両の走行制御装置。 - 上記退避制御手段は、ドライバの運転操作がある場合には、上記退避制御をキャンセルすることを特徴とする請求項1記載の車両の走行制御装置。
- 上記退避制御手段が実行する退避制御は、上記走行環境情報の取得が異常になる前の最後に検出した走行環境情報での視程と自車両の走行距離に応じて目標減速度を設定して減速制御することを特徴とする請求項1又は請求項2記載の車両の走行制御装置。
- 上記退避制御手段が実行する退避制御での減速制御で、自車両が停車した場合、上記自動運転制御を再起動することを特徴とする請求項3記載の車両の走行制御装置。
- 上記退避制御手段が実行する退避制御は、上記自車両周辺物体検出手段で自車両周辺の物体情報が検出された場合には、該検出された自車両周辺の物体と自車両との距離を所定に保つように操舵制御することを特徴とする請求項1乃至請求項4の何れか一つに記載の車両の走行制御装置。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014222493A JP6025268B2 (ja) | 2014-10-31 | 2014-10-31 | 車両の走行制御装置 |
| DE102015118101.0A DE102015118101B4 (de) | 2014-10-31 | 2015-10-23 | Fahrtsteuerungsvorrichtung für ein Fahrzeug |
| CN201510700365.XA CN105564440B (zh) | 2014-10-31 | 2015-10-26 | 车辆的行驶控制装置 |
| US14/928,943 US9764640B2 (en) | 2014-10-31 | 2015-10-30 | Travel control apparatus for vehicle |
Applications Claiming Priority (1)
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105564440A (zh) | 2016-05-11 |
| US9764640B2 (en) | 2017-09-19 |
| CN105564440B (zh) | 2018-06-08 |
| US20160121906A1 (en) | 2016-05-05 |
| DE102015118101A1 (de) | 2016-05-04 |
| DE102015118101B4 (de) | 2023-06-15 |
| JP6025268B2 (ja) | 2016-11-16 |
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