JP6243279B2 - 電動車両の駆動力制御装置 - Google Patents
電動車両の駆動力制御装置 Download PDFInfo
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- B60L2240/00—Control parameters of input or output; Target parameters
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- B60L2240/00—Control parameters of input or output; Target parameters
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- B60L2240/00—Control parameters of input or output; Target parameters
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- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/423—Torque
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- B60L2250/26—Driver interactions by pedal actuation
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- B60L2260/00—Operating Modes
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- B60L2260/42—Control modes by adaptive correction
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- B60L2270/00—Problem solutions or means not otherwise provided for
- B60L2270/10—Emission reduction
- B60L2270/14—Emission reduction of noise
- B60L2270/145—Structure borne vibrations
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Description
Gm(s)=1/(JTNs) …(1)
ここで、JT[Nms2]はモータ軸換算総合イナーシャ(慣性モーメント)であり、Nは減速比であり、sはラプラス演算子である。
Gh1(s)=s/(s+ωHPF) …(2)
Gh2(s)=s2/(s+ωHPF)2 …(3)
式(2),(3)において、sはラプラス演算子であり、ωHPF[rad/s]はカットオフ周波数である。カットオフ周波数ωHPFを大きくするほど、より広い周波数帯域の外乱トルク成分を除去することができるが、ねじれ振動の抑制効果(振動抑制性能)は逆に低下するというトレードオフの関係がある。このため、外乱トルク成分の除去と、振動抑制性能とが両立するような値に設定することが好ましい。
そこで、第1の実施の形態では、駆動軸トルクのオーバーシュートを低減するとともに、駆動軸トルクの立ち上がりを早くしたものである。
次に、図面を参照して、本発明の実施の形態を説明する。以下の図面の記載において、同一又は類似の部分には同一又は類似の符号を付している。
第1の実施の形態は、図1に示す構成に対して、フィードフォワード補償器(以下、FF補償器)14を設けたことを特徴とする。FF補償器14は、G1理想応答部14aと、1/G2制御系逆系部14bとから構成されている。
また、制御系の応答は、伝達関数を2次遅れ要素で近似するのが好ましい。これは次数を増やすと近似精度は良くなるが、FF補償器14の演算負荷が増えるからである。2次遅れ要素で近似した場合に誤差が0.15〜0.25秒後に図3中の実線と一点鎖線との差として、現れている。
Gh3(s)=ωn 2/(s2+2ζωns+ωn 2) …(4)
ここで、ωnは、固有周波数であり、ζは減衰比であり、sはラプラス演算子である。
第1の実施形態では、フィッティング2次遅れ要素を持つ伝達関数G2は、固有周波数ωnを50rad/sとし、減衰比ζを0.4とした。理想応答である伝達関数G1は、固有周波数ωnを伝達関数G2の固有周波数ωnと同じ50rad/sにした。
第1の実施形態では、伝達関数G1と伝達関数G2の固有周波数を同じ値に設定し、目標駆動力がステップ的に変化する場合を想定した場合でも、モータトルクが過大にならないようにしている。
12 除算手段
13 回転速度検出手段
14 FF補償器
14a G1理想応答部
14b 1/G2制御系逆系部
15 目標速度演算手段
16 偏差演算手段
17 振動補正量演算手段
18 外乱除去手段
19 指令値演算手段
20 補正量演算手段
21 固有周波数設定手段
30 プラント
Claims (6)
- 車両駆動系におけるモータの駆動力を制御する電動車両の駆動力制御装置であって、
運転者が要求する駆動力を第1目標駆動力として設定する目標駆動力設定部と、
前記第1目標駆動力に対して実際に出力される実駆動力がオーバーシュートするのを抑制するように第2目標駆動力を演算するフィードフォワード補償器と、
入力目標駆動力から前記車両駆動系を完全な剛体とした車両モデルを用いて、前記モータの目標回転速度を演算する目標速度演算部と、
前記目標回転速度及び前記モータの実回転速度に基づいて、前記目標回転速度と前記実回転速度との偏差を小さくする補正量を演算する補正量演算部と、
前記入力目標駆動力に前記補正量を加算することにより、モータトルク指令値を演算する指令値演算部と、
を備え、
前記フィードフォワード補償器は、
前記第1目標駆動力に対して、前記実駆動力が所定の応答となる特性を表した第1伝達関数と、前記フィードフォワード補償器を除き、前記目標速度演算部、前記補正量演算部、前記指令値演算部及び前記車両駆動系を含む制御系における、前記入力目標駆動力と前記実駆動力との間の伝達特性を近似的に表した第2伝達関数の、逆数と、で構成され、前記制御系には、前記入力目標駆動力として前記第2目標駆動力が入力されることを特徴とする電動車両の駆動力制御装置。 - 前記第2伝達関数は、2次遅れ要素で前記制御系を近似したものであり、
前記2次遅れ要素の減衰比を、前記実駆動力の応答に対応する所定の減衰比とし、
前記2次遅れ要素の固有周波数を、前記実駆動力の応答に対応する所定の固有周波数とすることによって行ったことを特徴とする請求項1に記載の電動車両の駆動力制御装置。 - 前記第1伝達関数は、2次遅れ要素であり、
前記第1伝達関数の減衰比は、前記第2伝達関数の減衰比よりも大きいことを特徴とする請求項2に記載の電動車両の駆動力制御装置。 - 前記第1伝達関数及び前記第2伝達関数の各々の固有周波数は、互いに同じ値であることを特徴とする請求項3に記載の電動車両の駆動力制御装置。
- 前記運転者の加速要求値の変化速度が小さい程、前記第1伝達関数の固有周波数をより大きい値に設定する固有周波数設定部を備えることを特徴とする請求項1から4のいずれか1項に記載の電動車両の駆動力制御装置。
- 前記固有周波数設定部は、前記第1目標駆動力を微分し、前記第1目標駆動力の微分値を前記運転者の加速要求値の前記変化速度として処理することを特徴とする請求項5に記載の電動車両の駆動力制御装置。
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JP2014075961A JP6243279B2 (ja) | 2014-04-02 | 2014-04-02 | 電動車両の駆動力制御装置 |
CN201580017688.7A CN106132766B (zh) | 2014-04-02 | 2015-03-27 | 电动车辆的驱动力控制装置 |
PCT/JP2015/059696 WO2015152068A1 (ja) | 2014-04-02 | 2015-03-27 | 電動車両の駆動力制御装置 |
US15/300,452 US9919605B2 (en) | 2014-04-02 | 2015-03-27 | Driving force controller for electric vehicle |
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JP6272178B2 (ja) * | 2014-08-06 | 2018-01-31 | 株式会社デンソー | 回転電機の制御装置 |
JP6589554B2 (ja) * | 2015-10-26 | 2019-10-16 | 日産自動車株式会社 | 電動車両の制御方法、及び、制御装置 |
JP6736991B2 (ja) * | 2016-06-08 | 2020-08-05 | 日産自動車株式会社 | 電動車両の制御方法、及び電動車両の制御装置 |
JP6469071B2 (ja) * | 2016-12-26 | 2019-02-13 | 株式会社Subaru | 車両の制動制御装置 |
JPWO2019111671A1 (ja) * | 2017-12-05 | 2020-11-26 | 日本電産株式会社 | 回転制御装置、移動体、および搬送ロボット |
WO2019123573A1 (ja) * | 2017-12-20 | 2019-06-27 | 三菱電機株式会社 | 電動機の制御装置 |
CN113439048A (zh) * | 2019-02-14 | 2021-09-24 | 三菱电机株式会社 | 车间距离控制装置 |
AT522353B1 (de) * | 2019-08-05 | 2020-10-15 | Avl List Gmbh | Prüfstand und Verfahren zur Durchführung eines Prüflaufs auf einem Prüfstand |
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