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Adaptability of quadruped animals is not solely reached by brain control, but by the interaction between its body, environment, and control. Especially, morphology of the body is supposed to contribute largely to the adaptability. We have tried to understand quadrupedal locomotion by building a bio-inspired quadruped robot named “Pneupard”, which has a feline-like muscular-skeletal structure. In our...
Cyclical locomotion, such as walking, hopping and running, is known to be generated at the spinal cord, guiding human and animal strides over different gaits. Over the last years, many researchers concentrated their study on the origin of such signals, replicating them by either controlling joint angles or torques. In this work, we use a quadruped pneumatic robot to reproduce stable walking on a treadmill...
Animals have several peripheral feedback control networks such as stretch reflexes that are supposed to be contributing to stability of their behavior. In this paper, we focus on rolling stability of hopping of a biped robot, and investigate several schemes on an experimental robot for implementing the stretch reflex: no reflex, undelayed and delayed reflex, how they contribute to the stability. For...
Direct teaching is suitable for generating motions of robot arms which have complex kinematics. So far, we have proposed a direct teaching method specialized for musculoskeletal robot arms actuated by pneumatic artificial muscles (PAMs) based on their pressure and tension information. In the method, it is important to prevent slacks and excessive tensions of PAMs to efficiently obtain the pressure...
The human musculoskeletal system is supposed to play an important role in doing various static and dynamic tasks. From this standpoint, some musculoskeletal humanoid robots have been developed in recent years. However, existing musculoskeletal robots did not have upper body with several DOFs to balance their bodies statically or did not have enough power to perform dynamic tasks. We think the musculoskeletal...
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