JP4835539B2 - 駆動力制御装置 - Google Patents
駆動力制御装置 Download PDFInfo
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Description
Fh=a・θ ・・・(1)
Fh=F0・exp (K1・θ) ・・・(2)
ΔI/I=一定
とするウェーバーの法則が成り立つことが知られている。このウェーバー比は、感覚の種類により異なる値であることが知られている。このように、上記の数式2を用いることにより、アクセル開度の変化量に対して、反力発生装置27で発生する反力を、指数関数的に制御することができる。
Fh=e・θ ・・・(3)
Fh=F1・exp (K1′・θ) ・・・(4)
ここで、アクセル開度θが所定値θ0 未満である場合は数式3を用い、アクセル開度θが所定値θ0 以上である場合は数式4を用いる。前記数式3の「e」は一次関数の傾きを表す定数(比例係数)であり、この「定数e」と前記「定数a」とは異なる。また、数式4の定数「K1′」はウェーバー比に基づく定数であり、「定数K1′」は前記「定数K1」とは異なる値である。
F=a・θ ・・・(5)
F=F0・exp (K1・θ) ・・・(6)
F=e・θ ・・・(7)
F=F1・exp (K1′・θ) ・・・(8)
ここで、アクセル開度θが所定値θ0 未満である場合は数式7を用い、アクセル開度θが所定値θ0 以上である場合は数式8を用いる。なお、数式5ないし数式8において、各記号の意味は、前述と同じである。
F=a×θ+b ・・・(9)
F=c×θ+d ・・・(10)
ここで、アクセルペダルが踏み込まれる場合は数式9を用い、アクセルペダルが戻される場合は、数式10を用いる。この数式9および数式10を用いて求めたアクセル開度と踏力との関係を、図6の特性線図に示す。数式9において、アクセル開度θ0 以上でアクセルペダルが踏み込まれた場合の特性を示す直線を延長した踏力が、「b」である。数式10において、アクセル開度θ0 以上でアクセルペダルが戻された場合の特性を示す直線を延長した踏力が、「c」である。また、数式9の「a」、数式10の「d」は共に一次関数の傾きを表す定数である。上記の図5と図6とを比較すると、アクセル開度θ0 以上の範囲では、アクセル開度の変化量が同じであっても、踏力が異なることが分かる。
Fd=C・(F0・exp (K1・θ))K2 ・・・(11)
この数式11において、「Fd」は目標駆動力であり、「C」は定数であり、添え字(上付き)の「K2」はべき乗指数である。この数式11は、アクセル開度θの変化量に対して、目標駆動力Fdが指数関数的に変化することを示している。数式11はアクセル開度θが増加する場合、およびアクセル開度θが減少する場合の両方に用いることが可能である。具体的には、アクセル開度が増加すると目標駆動力が高まり、アクセル開度が減少すると、目標駆動力が低下する。
G1=k1 log G ・・・(12)
また、乗員の体感する加速度とアクセルペダルの踏力との関係が線形である場合、数式13で表すことが可能である。
G1=k2 log F ・・・(13)
また、車両の加速度とアクセルペダルの踏力との関係が線形である場合、数式14で表すことが可能である。
G=exp (k2 F/k1 )=exp (KF) ・・・(14)
ここで、G1は乗員が体感する加速度であり、Gは車両の加速度であり、Fはアクセルペダルに加えられる踏力であり、k2 およびk1 は定数である。これらの数式12ないし数式14においては、乗員が体感する加速度が対数関数的に表されている。
N=exp (KFinc )
=exp (K(a×θ+b)) ・・・(15)
この数式15において、「K」は定数であり、「a」はアクセルペダル26に加えられる踏力と操作量との関係を示す比例定数であり、「b」はアクセルペダル26に加えられる踏力と操作量との関係を示す切片定数である。
N=exp (KFdec )
=exp (K(c×θ+d)) ・・・(16)
この数式16において、「K」は定数であり、「c」はアクセルペダル26に加えられる踏力と操作量との関係を示す比例定数であり、「b」はアクセルペダル26に加えられる踏力と操作量との関係を示す切片定数である。
E=KIn ・・・(17)
そして、べき関数の指数nに基づいて、「定数K」を選択すればよい。このようにスチーブンスの法則を用いた場合も、ウェーバー・ヘフナーの法則を用いた場合と同様の効果を得られる。
Claims (5)
- 走行体を推進させるための推力を発生する駆動装置と、前記走行体の乗員によって操作される操作装置と、この操作装置に加えられる操作力の変化量、または前記操作装置の操作量の変化量、または操作装置の操作速度に基づいて、前記走行体における目標駆動力を決定する目標駆動力決定装置と、決定された目標駆動力に基づいて、前記駆動装置で発生する推力を制御するコントローラとを有する駆動力制御装置において、
前記操作装置に加えられる操作力の変化量、または前記操作装置の操作量の変化量、または前記操作装置の操作速度に対して、前記目標駆動力決定装置で決定する目標駆動力を指数関数的に変化させる目標駆動力算出手段を有することを特徴とする駆動力制御装置。 - 前記目標駆動力算出手段は、前記操作装置に加えられる操作力が増加する場合と減少する場合とで、異なる指数関数を用いて前記目標駆動力を変化させる手段を含むことを特徴とする請求項1に記載の駆動力制御装置。
- 前記目標駆動力算出手段は、前記操作装置の操作量が増加する場合と減少する場合とで、異なる指数関数を用いて前記目標駆動力を変化させる手段を含むことを特徴とする請求項1に記載の駆動力制御装置。
- 前記目標駆動力算出手段は、前記操作装置の操作速度が相対的に速い場合と、相対的に遅い場合とで、異なる指数関数を用いて前記目標駆動力を変化させる手段を含むことを特徴とする請求項1に記載の駆動力制御装置。
- 前記操作装置が操作された際に操作に対する反力を発生する反力発生装置と、
前記操作装置に加えられる操作力の変化量、または前記操作装置の操作量の変化量、または前記操作装置の操作速度に対して、前記反力発生装置により発生する反力を指数関数的に変化させる反力制御手段と
を更に有することを特徴とする請求項1に記載の駆動力制御装置。
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CN2008801020293A CN101772629B (zh) | 2007-08-10 | 2008-08-08 | 操作辅助装置和驱动力控制装置 |
US12/673,116 US8401734B2 (en) | 2007-08-10 | 2008-08-08 | Operation assisting system and driving force controlling system |
PCT/JP2008/064276 WO2009022637A1 (ja) | 2007-08-10 | 2008-08-08 | 操作補助装置および駆動力制御装置 |
DE112008002136T DE112008002136T5 (de) | 2007-08-10 | 2008-08-08 | Betätigungsunterstützungssystem und Antriebskraftsteuerungssystem |
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