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Filius, S.J. (author), Janssen, Mariska (author), van der Kooij, H. (author), Harlaar, J. (author)People with severe muscle weakness in the upper extremity are in need of an arm support to enhance arm function and improve their quality of life. In addition to weight support, compensation of passive joint impedance (pJimp) seems necessary. Existing devices do not compensate for pJimp yet, and the best way to compensate for it is still unknown...conference paper 2023
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Yang, Han Ping (author), Jang, Chau Shin (author), van der Kooij, H. (author)An electromagnetic spring-based variable stiffness actuator is a new concept with the potential to change stiffness faster than mechanical springs can; however, its nonlinear elastic property is a challenge in actuator design. In this paper, the torque response of a custom-made electromagnetic spring was studied using a ramping force test and...conference paper 2019
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Van'T Veld, Ronald C. (author), Schouten, A.C. (author), van der Kooij, H. (author), Van Asseldonk, Edwin H.F. (author)Biofeedback of online system identification estimates of intrinsic and reflexive joint impedance can be used by able-bodied subjects to voluntarily modulate their reflexive impedance independent of the intrinsic contribution. Similar to EMG-based paradigms, this could potentially be used to reduce muscle hyperreflexia in people with...conference paper 2018