JP7460513B2 - 車両運動制御装置、および、車両運動制御方法 - Google Patents
車両運動制御装置、および、車両運動制御方法 Download PDFInfo
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Description
図1は、本実施例に係る車両1の概略構成を示す平面図である。ここに示すように、車両1は、車体10に、車輪11、モータ12、サスペンション13、ステア14、ブレーキ15、及び、スタビライザ16を搭載したものである。なお、以下では、車両1の前後方向をx軸(前方向を正)、横方向をy軸(左方向を正)、上下方向をz軸(上方向を正)とする。
ここで、図2を用いて、加速中の車両1において、各輪の駆動力または制動力(以下、「制駆動力Fx」と称する)によって車体10に加わるジャッキアップ力Jxを説明する。なお、「ジャッキアップ力」の表現には、上向きの力である正方向のジャッキアップ力と、下向きの力である負方向のジャッキアップ力を含むものとする。
次に、図3Aと図3Bを用いて、車両1において、各輪の横力Fyによって車体10に加わるジャッキアップ力Jyと実車体姿勢の関係を説明する。
加減速中の制駆動力Fxに起因するピッチングや、旋回中の横力Fyに起因するローリング等は、乗員の乗り心地や運転者の操作感を劣化させるため、本実施例の車両運動制御装置2は、走行状態に応じて車体姿勢を適正化するように各アクチュエータの操作量を統括制御する。
車両運動立案部21は、運転者操作情報、外界情報、センサ情報に基づいて、後述するモーションベクトル制御可能範囲内で、6自由度の目標モーションベクトルを立案する。なお、運転者操作情報は、例えば、運転者がハンドルを操舵した際の操舵情報、加速ペダルの踏み込んだ際の加速ペダル情報、減速ペダルの踏み込んだ際の減速ペダル情報などである。また、外界情報は、例えば、カメラやカーナビゲーションシステムから取得した道路曲率や路面摩擦などである。さらに、センサ情報は、車体10に設置したセンサから取得した、車両速度、車両加速度、車両姿勢などの各情報などである。
操作量調停部22は、外界情報、センサ情報、目標モーションベクトルに基づいて、各アクチュエータの操作量を演算するとともに、各アクチュエータからの動作情報に基づいて、モーション空間内でのモーションベクトルの制御可能範囲を演算する。
モータ制御部23は、操作量調停部22からの操作量情報に基づいて各々のモータ12を制御する。サスペンション制御部24は、操作量調停部22からの操作量情報に基づいて各々のサスペンション13を制御する。ステアリング制御部25は、操作量調停部22からの操作量情報に基づいて各々のステア14を制御する。ブレーキ制御部26は、操作量調停部22からの操作量情報に基づいて各々のブレーキ15を制御する。スタビライザ制御部27は、操作量調停部22からの操作量情報に基づいて各々のスタビライザ16を制御する。
次に、図8のフローチャートを用いて、本実施例の車両運動制御装置2の制御う内容を説明する。
次に、図9から図12を用いて、本実施例の車両運動制御装置2を実環境に適用した場合の効果について説明する。
10 車体
11 車輪
12 モータ
13 サスペンション
14 ステア
15 ブレーキ
16 スタビライザ
17 ロアアーム
2 車両運動制御装置
21 車両運動立案部
22 操作量調停部
23 モータ制御部
24 サスペンション制御部
25 ステアリング制御部
26 ブレーキ制御部
27 スタビライザ制御部
Fx 制駆動力
Jx 制駆動力によるジャッキアップ力
Fy 横力
Jy 横力によるジャッキアップ力
Ax 前後加速度
Ay 横加速度
Az 上下加速度
φ ロール角
θ ピッチ角
r ヨーレート
Claims (5)
- 複数のアクチュエータを走行状態に応じて統括制御することで、車両運動を制御する車両運動制御装置であって、
入力された走行状態情報に基づいて目標モーションベクトルを生成する車両運動立案部と、
前記目標モーションベクトルに基づいて各アクチュエータの操作量を計算する操作量調停部と、
前記操作量に基づいて各アクチュエータを制御するアクチュエータ制御部と、
を具備し、
前記車両運動立案部は、前記操作量調停部から取得した、モーション空間での制御可能範囲内で前記目標モーションベクトルを生成し、
前記目標モーションベクトルは、前後方向の加速度、横方向の加速度、上下方向の加速度、ロール角、ピッチ角、ヨーレートの6自由度の車両運動を定義するベクトルであり、前後方向の加速度、横方向の加速度、上下方向の加速度の三軸からなるモーション空間上に配置された、起点で、前後方向の加速度、横方向の加速度、上下方向の加速度を定義し、傾きで、ロール角とピッチ角を定義し、姿勢でヨーレートを定義する有顔ベクトルであることを特徴とする車両運動制御装置。 - 複数のアクチュエータを走行状態に応じて統括制御することで、車両運動を制御する車両運動制御装置であって、
入力された走行状態情報に基づいて目標モーションベクトルを生成する車両運動立案部と、
前記目標モーションベクトルに基づいて各アクチュエータの操作量を計算する操作量調停部と、
前記操作量に基づいて各アクチュエータを制御するアクチュエータ制御部と、
を具備し、
前記車両運動立案部は、前記操作量調停部から取得した、モーション空間での制御可能範囲内で前記目標モーションベクトルを生成し、
前記目標モーションベクトルは、前後方向の加速度、横方向の加速度、上下方向の位置、ロール角、ピッチ角、ヨーレートの6自由度の車両運動を定義するベクトルであり、前後方向の加速度、横方向の加速度、上下方向の位置の三軸からなるモーション空間上に配置された、起点で、前後方向の加速度、横方向の加速度、上下方向の位置を定義し、傾きで、ロール角とピッチ角を定義し、姿勢でヨーレートを定義する有顔ベクトルであることを特徴とする車両運動制御装置。 - 複数のアクチュエータを走行状態に応じて統括制御することで、車両運動を制御する車両運動制御装置であって、
入力された走行状態情報に基づいて目標モーションベクトルを生成する車両運動立案部と、
前記目標モーションベクトルに基づいて各アクチュエータの操作量を計算する操作量調停部と、
前記操作量に基づいて各アクチュエータを制御するアクチュエータ制御部と、
を具備し、
前記車両運動立案部は、前記操作量調停部から取得した、モーション空間での制御可能範囲内で前記目標モーションベクトルを生成し、
前記アクチュエータ制御部は、各アクチュエータの動作情報を前記操作量調停部に送信し、
前記操作量調停部は、各アクチュエータの動作情報に基づいて、前記モーション空間での制御可能範囲を更新することを特徴とする車両運動制御装置。 - 請求項3に記載の車両運動制御装置において、
前記操作量調停部が前記モーション空間での制御可能範囲を更新した場合、前記車両運動立案部は、前記操作量調停部が更新した制御可能範囲内で前記目標モーションベクトルを生成することを特徴とする車両運動制御装置。 - 複数のアクチュエータを走行状態に応じて統括制御することで、車両運動を制御する車両運動制御方法であって、
入力された走行状態情報に基づいて、モーション空間での制御可能範囲内で目標モーションベクトルを生成する第一ステップと、
前記目標モーションベクトルに基づいて各アクチュエータの操作量を計算する第二ステップと、
前記操作量に基づいて各アクチュエータを制御する第三ステップと、
各アクチュエータの動作情報に基づいて、前記モーション空間での制御可能範囲を更新する第四ステップを有することを特徴とする車両運動制御方法。
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