Abstract
An isokinetic exercise is one of the training methods. Servomechanism using electric motor has been used for isoki netic exercise system. But, isokinetic exercises can be realized by using passive devices such as brakes or dampers. Since such passive systems are inherently safe, they are suitable for mechanical systems which are operated by hu man beings. In this study, we develop the brake using particle-type ER fluid. ER fluid is a fluid whose rheological characteristics can be controlled by electric field. ER brakes can response very quickly and have the characteristics like Coulomb friction. Then, we discuss the velocity control of ER brake system. Finally we confirmed the validity of the proposed method by control experiments.
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