Method and apparatus for calculating torque of walking assistance device
First Claim
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1. A method of calculating an output torque of a walking assistance device via a controller connected to one or more sensors, the method comprising:
- sensing, via signals from the one or more sensors, a joint angle associated with a joint of a user;
determining a gait cycle by applying the joint angle to a particularly shaped adaptive oscillator (PSAO);
determining a gait parameter with respect to a transition among predefined gait states by applying the joint angle to a finite state machine (FSM);
calculating the output torque based on the gait cycle and the gait parameter, the calculating including,correcting the gait cycle using the gait parameter as a reference value to generate a corrected gait cycle; and
calculating the output torque corresponding to the corrected gait cycle, andinstructing a driver to apply the output torque to a support of the walking assistance device associated with the joint of the user.
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Abstract
A method and apparatus for calculating a torque of a walking assistance device, the method including receiving a measured joint angle, obtaining a gait parameter with respect to a transition among a predetermined number of gait states based on the joint angle, obtaining a gait cycle based on the joint angle, and obtaining an output torque based on the gait cycle and the gait parameter, is provided.
41 Citations
20 Claims
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1. A method of calculating an output torque of a walking assistance device via a controller connected to one or more sensors, the method comprising:
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sensing, via signals from the one or more sensors, a joint angle associated with a joint of a user; determining a gait cycle by applying the joint angle to a particularly shaped adaptive oscillator (PSAO); determining a gait parameter with respect to a transition among predefined gait states by applying the joint angle to a finite state machine (FSM); calculating the output torque based on the gait cycle and the gait parameter, the calculating including, correcting the gait cycle using the gait parameter as a reference value to generate a corrected gait cycle; and calculating the output torque corresponding to the corrected gait cycle, and instructing a driver to apply the output torque to a support of the walking assistance device associated with the joint of the user. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A torque calculating apparatus comprising:
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one or more sensors configured to sense a joint angle associated with a joint of a user; a receiver configured to receive a measurement of the joint angle; and a processor configured to, determine a gait cycle by applying the joint angle to a particularly shaped adaptive oscillator (PSAO); determine a gait parameter with respect to a transition among predefined gait states by applying the joint angle to a finite state machine (FSM); calcuate output torque based on the gait cycle and the gait parameter by, correcting the gait cycle using the gait parameter as a reference value to generate a corrected gait cycle; and calculating the output torque corresponding to the corrected gait cycle, and instruct a driver to apply the output torque to a support of a walking assistance device associated with the joint of the user.
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17. A torque calculating method via a controller connected to one or more sensors, the method comprising:
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sensing, via signals from the one or more sensors, a joint angle associated with a joint of a user; obtaining a first gait cycle based on a measured joint angle using a particularly shaped adaptive oscillator (PSAO); obtaining a second gait cycle with respect to a transition among predefined gait states based on the joint angle using a finite state machine (FSM); calculating a final gait cycle based on the first gait cycle and the second gait cycle when the transition occurs; calculating a torque corresponding to the final gait cycle; and instructing a driver to apply the torque to a support of a walking assistance device associated with the joint of the user.
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18. A method of calculating a torque to apply to a walking assistance device via a controller connected to one or more sensors, the method comprising:
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sensing, via signals from the one or more sensors, a joint angle associated with a joint of a user; determining a current gait state within a gait cycle of the user based on the joint angle by, setting a phase of an oscillator of a particularly shaped adaptive oscillator (PSAO) as the current gait state, if the oscillator has a fundamental frequency corresponding to a gait frequency, and setting a phase of a finite state machine (FSM) as the current gait state by overriding the PSAO, if the gait cycle has completed less than a threshold number of times; calculating the torque based on the current gait state; and instructing a driver to apply the torque to a support of the walking assistance device associated with the joint of the user. - View Dependent Claims (19, 20)
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Specification