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Derivation of nonlinear dynamic model of novel pneumatic artificial muscle manipulator with a magnetorheological brake

An artificial rubber muscle was used as an actuator in the present study because it was safe for the muscle manipulator to come into contact with the human body. However, this actuator vibrates and can cause late responses because of the air pressure that is applied to the manipulation. We have built a magnetorheological (MR) brake that uses MR fluid with fast response into the joint to control the vibration. In this paper, we have described the manipulator's dynamic characteristics by construction of a model for improvement of the control performance of the MR brake. Furthermore, a simulation was performed using the model and efficient braking by the MR brake was achieved.