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. 2020 Dec 18;8:592637. doi: 10.3389/fbioe.2020.592637

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Copyright © 2020 Shi, Heung, Tang, Tong and Li.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Examples of the experimental data and model fitting results for subject S3 with chronic stroke with MAS = 3. The torque and angle of the MCP joint in S3 is collected from the ROM of 0° to 90° for model fitting. Results of MCP joint stiffness in S3 are presented by two different estimation methods. Using the SECA, pressure is increased by 20 kPa until the angle reaches the upper limit. Using the standard device, six joint angles are selected by portion in the angle range for estimation of MCP joint stiffness. Error bar presents the different between the maximum and minimum measured stiffness values. Final joint stiffness is taken by the average of all measured values.