JP2020104790A - 演算モデル生成システムおよび演算モデル生成方法 - Google Patents
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Abstract
Description
図1は、実施形態に係る演算モデル生成システム100の機能構成を示すブロック図である。演算モデル生成システム100は、タイヤ10に配設された加速度センサ20によって計測された加速度を、タイヤ力推定装置30において、タイヤ力Fを算出する演算モデルに入力し、演算モデルの出力としてタイヤ力Fを算出する。演算モデル生成システム100は、演算モデルとして例えばニューラルネットワーク等の学習型モデルを用い、タイヤ10に働くタイヤ軸力を計測して教師データとし、演算の実行と演算モデルの更新による学習を繰り返すことによって演算モデルの精度を高める。演算モデル生成システム100は、演算モデルに学習させた後、タイヤ力を推定するタイヤ力推定システムとしても機能し得る。
実施形態に係る演算モデル生成システム100は、センサ情報取得部31、タイヤ力算出部32および演算モデル更新部33を備える。情報取得部としてのセンサ情報取得部31は、加速度センサ20で計測されるタイヤ10の加速度を取得する。タイヤ力算出部32は、加速度に基づいてタイヤ力Fを算出する演算モデル32bを有し、センサ情報取得部31により取得された加速度を入力して演算モデル32bによりタイヤ力Fを算出する。演算モデル更新部33は、タイヤ10で計測されるタイヤ軸力とタイヤ力算出部32により算出されたタイヤ力Fとを比較し、演算モデルを更新する。これにより、演算モデル生成システム100は、タイヤ10に配設した加速度センサ20によって計測されたタイヤの加速度を用い、演算モデルを更新することで、タイヤ力Fを精度良く推定する演算モデルを生成することができる。
21 圧力ゲージ(計測器)、 22 温度センサ(計測器)、
31 センサ情報取得部(情報取得部)、 32 タイヤ力算出部、
32a 前処理部、 32b 演算モデル、 33 演算モデル更新部、
100 演算モデル生成システム。
Claims (7)
- タイヤの加速度を取得する情報取得部と、
加速度に基づいてタイヤ力を算出する演算モデルを有し、前記情報取得部により取得された加速度を入力して前記演算モデルによりタイヤ力を算出するタイヤ力算出部と、
前記タイヤで計測されるタイヤ軸力と前記タイヤ力算出部により算出されたタイヤ力とを比較し、前記演算モデルを更新する演算モデル更新部と、
を備えることを特徴とする演算モデル生成システム。 - 前記タイヤの加速度を計測する加速度センサを備え、
前記加速度センサは、前記タイヤのホイールのリム部およびタイヤ本体の少なくとも一方に配設されていることを特徴とする請求項1に記載の演算モデル生成システム。 - 前記加速度センサは前記タイヤの径方向の加速度を計測し、
前記タイヤ力算出部は鉛直方向のタイヤ力を算出することを特徴とする請求項2に記載の演算モデル生成システム。 - 前記加速度センサは、前記タイヤの径方向、軸方向および前後方向の加速度を計測し、
前記タイヤ力算出部は、鉛直方向、前記タイヤの横方向および前後方向のタイヤ力を算出することを特徴とする請求項2に記載の演算モデル生成システム。 - 前記タイヤ力算出部は、前記加速度センサによる計測結果に基づいて、前記タイヤの路面接地状態における加速度を抽出する前処理部を有することを特徴とする請求項2から4のいずれか1項に記載の演算モデル生成システム。
- 前記タイヤの空気圧および温度の少なくとも一方を計測する計測器を備え、
前記演算モデルは、前記計測器による計測結果をタイヤ力の算出に用いることを特徴とする請求項1から5のいずれか1項に記載の演算モデル生成システム。 - タイヤの加速度を取得する情報取得ステップと、
加速度に基づいてタイヤ力を算出する演算モデルに基づき、前記情報取得ステップにより取得された加速度を入力して前記演算モデルによりタイヤ力を算出するタイヤ力算出ステップと、
前記タイヤで計測されるタイヤ軸力と前記タイヤ力算出ステップにより算出されたタイヤ力とを比較し、前記演算モデルを更新する演算モデル更新ステップと、
を備えることを特徴とする演算モデル生成方法。
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CN201911301107.9A CN111452797B (zh) | 2018-12-28 | 2019-12-17 | 运算模型生成系统及运算模型生成方法 |
EP19217320.1A EP3674159B1 (en) | 2018-12-28 | 2019-12-18 | Arithmetic model generation system and arithmetic model generation method |
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JP6790142B2 (ja) * | 2019-01-31 | 2020-11-25 | Toyo Tire株式会社 | タイヤ力推定システムおよびタイヤ力推定方法 |
JP7194066B2 (ja) * | 2019-03-29 | 2022-12-21 | Toyo Tire株式会社 | 演算モデル生成システム、摩耗量推定システムおよび演算モデル生成方法 |
EP4234352A4 (en) * | 2020-10-21 | 2024-04-10 | Bridgestone Corporation | VEHICLE SPEED CONTROL SYSTEM |
US11958489B2 (en) * | 2021-03-16 | 2024-04-16 | Kawasaki Motors, Ltd. | Tire force estimator, four-wheeled vehicle, and tire force estimation method |
DE102021205799A1 (de) * | 2021-06-09 | 2022-12-15 | Robert Bosch Gesellschaft mit beschränkter Haftung | Beschleunigungssensor, Kraftfahrzeug und Verfahren zur Ermittlung einer Reifenaufstandskraft |
US11787414B2 (en) * | 2021-07-23 | 2023-10-17 | GM Global Technology Operations LLC | GPS enhanced friction estimation |
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JP2010195326A (ja) * | 2009-02-26 | 2010-09-09 | Nissan Motor Co Ltd | 車両接地面摩擦状態推定装置及びその方法 |
KR101228291B1 (ko) * | 2011-02-16 | 2013-01-31 | 주식회사 만도 | 인텔리전트 타이어 모니터링 시스템 |
US9739689B2 (en) * | 2014-11-21 | 2017-08-22 | The Goodyear Tire & Rubber Company | Tire cornering stiffness estimation system and method |
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