JP7053136B2 - 歩行補助装置のトルク算出方法及び装置 - Google Patents
歩行補助装置のトルク算出方法及び装置 Download PDFInfo
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Description
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ε(n)=θh(n)―θp(n)
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310:制御部
320:センサ
330:駆動部
Claims (11)
- 歩行補助装置の出力トルク算出方法であって、前記歩行補助装置はセンサとプロセッサとを含み、前記方法は、前記プロセッサにより、
前記センサから受信した関節角度をPSAO(particularly shaped adaptive oscillator)に適用することによって第1歩行周期を決定するステップであって、前記PSAOは、基本周波数と前記基本周波数の整数倍の周波数を有する複数の発振器を有する、ステップと、
前記関節角度をFSMに適用することによって前記FSMに対して予め決定した歩行状態の間の遷移に対する歩行パラメータを第2歩行周期として決定するステップであって、前記予め決定された歩行状態は、右側支持、左側スイング、左側支持、及び右側スイングのうち少なくとも1つを含む、ステップと、
前記第1歩行周期及び前記第2歩行周期に基づいて出力トルクを算出するステップと、
を含み、
前記出力トルクを算出するステップは、
前記第2歩行周期を参照値として使用し、前記第1歩行周期を修正するステップと、
前記修正された前記第1歩行周期に対応する前記出力トルクを算出するステップと、
を含む、歩行補助装置の出力トルク算出方法。 - 前記第1歩行周期を決定するステップは、
前記関節角度に基づいて歩行周波数を算出するステップと、
前記歩行周波数を用いて前記第1歩行周期を決定するステップと、
を含む、請求項1に記載の歩行補助装置の出力トルク算出方法。 - 前記第2歩行周期を決定するステップは、
前の歩行状態及び前記関節角度に基づいて前記予め決定された歩行状態のうちの現在の歩行状態を決定するステップと、
前記前の歩行状態及び前記現在の歩行状態を比較することによって前記遷移が発生したか否かを決定するステップと、
前記遷移が発生した場合、前記第2歩行周期を決定するステップと、
を含む、請求項1又は2に記載の歩行補助装置の出力トルク算出方法。 - 前記遷移が発生した場合、前記第2歩行周期を取得するステップは、前記現在の歩行状態に対して予め設定された値を前記第2歩行周期の値として定義するステップを含む、請求項3に記載の歩行補助装置の出力トルク算出方法。
- 前記第2歩行周期を決定するステップは、前記第2歩行周期に対する第2歩行周波数を算出するステップを含み、
前記出力トルクを算出するステップは、前記第1歩行周期及び前記第2歩行周波数を用いて前記出力トルクを算出するステップを含む、
請求項1乃至3のいずれか一項に記載の歩行補助装置の出力トルク算出方法。 - 前記第2歩行周波数を算出するステップは、前記遷移の周期を用いて前記第2歩行周波数を算出するステップを含む、請求項5に記載の歩行補助装置の出力トルク算出方法。
- 前記現在の歩行状態を決定するステップは、前記予め決定された歩行状態のうちの測定された関節角度に対応する歩行状態を前記現在の歩行状態に決定するステップを含む、請求項3に記載の歩行補助装置の出力トルク算出方法。
- 前記第2歩行周期を参照値として使用し、前記第1歩行周期を修正するステップは、
前記第1歩行周期及び前記第2歩行周期の間の差が閾値以上であるか否かを決定するステップと、
前記差が前記閾値以上の場合、前記第2歩行周期になるよう前記第1歩行周期を修正するステップと、
前記差が前記閾値未満の場合、前記第1歩行周期及び前記第2歩行周期を用いて前記第1歩行周期を修正するステップと、
を含む、請求項1乃至7のいずれか一項に記載の歩行補助装置の出力トルク算出方法。 - 前記出力トルクを算出するステップは、
予め設定された条件が満たされたか否かを決定するステップと、
前記条件が満たされた場合、前記第1歩行周期及び前記第2歩行周期のうちの前記第2歩行周期を用いて前記出力トルクを算出するステップと、
をさらに含む、請求項3又は4のいずれか一項に記載の歩行補助装置の出力トルク算出方法。 - 前記関節角度は、股関節、膝関節、及び足関節のうちの少なくとも1つの角度である、請求項1乃至9のいずれか一項に記載の歩行補助装置の出力トルク算出方法。
- センサから測定された関節角度を受信する通信部と、
前記受信した関節角度をPSAO(particularly shaped adaptive oscillator)に適用することによって第1歩行周期を決定し、前記関節角度をFSMに適用することによって前記FSMに対して予め決定した歩行状態の間の遷移に対する歩行パラメータを第2歩行周期として決定し、前記第1歩行周期及び第2歩行周期に基づいて出力トルクを算出するプロセッサと、
を含み、
前記PSAOは、基本周波数と前記基本周波数の整数倍の周波数を有する複数の発振器を有し、
前記予め決定した歩行状態は、右側支持、左側スイング、左側支持、及び右側スイングのうち少なくとも1つを含む、トルク算出装置。
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