JP2021526101A - 先進運転支援デバイスの閉ループを実装するための方法およびデバイス - Google Patents
先進運転支援デバイスの閉ループを実装するための方法およびデバイス Download PDFInfo
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Abstract
Description
既約信号と、車道の車線の中心に対する車両の重心の横方向偏差との間の伝達関数のノルムH2の上界の形態を取る第1の制約と、
先進運転支援システムの感度関数のノルムH∞の逆数の下界の形態を取る第2の制約と
から選定された少なくとも1つの制約を遵守しながら、既約信号と、ステアリングホイールの角度におけるジャーキネス(jerkiness)との間の伝達関数のノルムH2を最小にすることを含む。
ここで、
は相対向首角の変化率であり、ψrは相対向首角であり、
は車両の横方向速度であり、yLは車両の横方向偏差であり、
は前輪角の変化率であり、δは前輪角であり、∫yLは横方向偏差の積分である。
ここで、Cfは車両の前車軸アセンブリのコーナリング剛性であり、Crは車両の後車軸アセンブリのコーナリング剛性であり、Lfは、前車軸と車両の重心との間の距離であり、Lrは、後車軸と車両の重心との間の距離であり、mは車両の質量であり、Izは車両の慣性モーメントである。
およびδは補正されなければならない。ステアリングホイールの角度とステアリングされるホイールの角度は車両のパワーステアリングを介して直接関係付けられ、これは減速比(reduction ratio)と2次の変化率とに対応する。したがって、角度δは、ステアリングホイールの角度に対応すると考えられる。
ここで、LTは車両のホイールベースである。上記仮定が有効であると仮定すると、この式は以下の方法において簡略化され得る。
ここで、MfおよびLTは定数である。
によって定義される曲げ勾配の正の符号を介して評価される。
のノルムの最小化に対応する。
のノルムによって表される。
Claims (10)
- 自動車の横方向制御のための先進運転支援システムの閉ループ(4)を最適化するための方法であって、前記閉ループ(4)のコントローラ(16)が、前記車両の二輪車モデルを使用して最適化問題を解決することによって合成され(P02)、前記車両の質量(m)における分散と、前記車両の車軸アセンブリのコーナリング剛性における分散と、前記車両の重心の位置(Lf,Lr)における分散と、前記車両の慣性モーメント(Iz)における分散とから選定された少なくとも1つの分散を互いに対して有する、前記車両の少なくとも2つの二輪車モデルのファミリーが確立され(E01)、前記最適化問題が、前記ファミリーのすべてのモデルを使用して解決されることを特徴とする、先進運転支援システムの閉ループ(4)を最適化するための方法。
- 前記ファミリーに属する前記2つのモデルとは無関係に、これらのモデルが、前記車両の前記質量(m)における分散と、前記車両の前車軸アセンブリの前記コーナリング剛性(Cf)における分散と、前記車両の後車軸アセンブリの前記コーナリング剛性(Cr)における分散とから選定された少なくとも1つの分散を互いに対して有する、請求項1に記載の方法。
- 前記ファミリーが、前記車両の前部に存在するちょうど2人の乗客を輸送する前記車両の構成に対応する公称二輪車モデル(Σnominal)を備え、前記公称二輪車モデル(Σnominal)が、前記車両の公称質量(mnominal)と、前記前車軸アセンブリの公称コーナリング剛性(Cf,nominal)と、前記後車軸アセンブリの公称コーナリング剛性(Cr,nominal)とを採用し、前記ファミリーが、
前記車両の前記公称質量(mnominal)に等しい前記車両の質量、前記前車軸アセンブリの前記公称コーナリング剛性(Cf,nominal)よりも高い前記前車軸アセンブリのコーナリング剛性、および前記後車軸アセンブリの前記公称コーナリング剛性(Cr,nominal)よりも高い前記後車軸アセンブリのコーナリング剛性を採用する第1の代替二輪車モデル(Σalt1)と、
前記車両の前記公称質量(mnominal)に等しい前記車両の質量、前記前車軸アセンブリの前記公称コーナリング剛性(Cf,nominal)よりも低い前記前車軸アセンブリのコーナリング剛性、および前記後車軸アセンブリの前記公称コーナリング剛性(Cr,nominal)よりも低い前記後車軸アセンブリのコーナリング剛性を採用する第2の代替二輪車モデル(Σalt2)と、
前記車両の前記公称質量(mnominal)よりも高い前記車両の質量、前記前車軸アセンブリの前記公称コーナリング剛性(Cf,nominal)よりも低い前記前車軸アセンブリのコーナリング剛性、および前記後車軸アセンブリの前記公称コーナリング剛性(Cr,nominal)よりも高い前記後車軸アセンブリのコーナリング剛性を採用する第3の代替二輪車モデル(Σalt3)と、
前記車両の前記公称質量(mnominal)よりも高い前記車両の質量、前記前車軸アセンブリの前記公称コーナリング剛性(Cf,nominal)に等しい前記前車軸アセンブリのコーナリング剛性、および前記後車軸アセンブリの前記公称コーナリング剛性(Cr,nominal)よりも高い前記後車軸アセンブリのコーナリング剛性を採用する第4の代替二輪車モデル(Σalt4)と
から選定された少なくとも1つの代替二輪車モデルをさらに備える、請求項1または2に記載の方法。 - 道路曲率(ρ)が、ゼロの初期導関数をもつ3次モデル(Wρ)を使用してモデル化され(E02)、前記3次モデル(Wρ)を既約信号(ωρ)にかけることによって環境モデルが生成され、前記最適化問題が、前記生成された環境モデルを使用して解決される、請求項1から3のいずれか一項に記載の方法。
- 最大実数部(minDecay)と、原点において発し、実軸に対する幾何角(θ)をなす2つの直線ハーフライン(56、60)と、係数の等高線(58)との間に、複素平面の領域(52)が定義され(E04)、前記最適化問題は、前記ファミリーに属する各モデルについて、前記コントローラ(16)の極が前記領域(52)中に位置するように解決される、請求項1から5のいずれか一項に記載の方法。
- 前記閉ループ(4)の前記伝達関数の利得の最大値(Gmax)が受信され(E06)、前記最適化問題は、前記最大値(Gmax)が前記閉ループ(4)の前記伝達関数の前記利得の上界となるように解決される、請求項1から6のいずれか一項に記載の方法。
- 前記方法は、車線内で自動車をセンタリングするための先進運転支援システムを最適化するように意図された、請求項1から7のいずれか一項に記載の方法。
- プロセッサまたは電子制御ユニットによって実行されたとき、請求項1から8のいずれか一項に記載の方法を実装するように構成されたコードを含んでいるコンピュータプログラム。
- 最適化問題を作成するための作成ユニット(22)と、作成された最適化問題を解決することによってコントローラ(16)を合成するための合成ユニット(24)とを備える、自動車の横方向制御のための先進運転支援システムの閉ループ(4)を最適化するためのデバイス(20)であって、前記作成ユニット(22)が、前記車両の質量(m)における分散と、前記車両の車軸アセンブリのコーナリング剛性における分散と、前記車両の重心の位置(Lf,Lr)における分散と、前記車両の慣性モーメント(Iz)における分散とから選定された少なくとも1つの分散を互いに対して有する、前記車両の少なくとも2つの二輪車モデルのファミリーを選択するように構成された選択モジュール(26)を備え、前記合成ユニット(24)が、前記ファミリーのすべての前記モデルを使用して前記最適化問題を解決するように構成されることを特徴とする、先進運転支援システムの閉ループ(4)を最適化するためのデバイス(20)。
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CN114148411B (zh) * | 2021-12-16 | 2022-12-13 | 北京理工大学 | 一种轮式无人平台的漂移控制方法 |
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