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Control and synchronization drive unit of leg of walking robot
Houška, P. ; Březina, Tomáš ; Singule, V.
The contribution explores several approaches in control and synchronization of leg drives. It further deals with the selection of suitable trajectory for the movement of leg end point. Kinematics of walking robot leg movement is essentially influenced by used drive units and its control. The speed of leg endpoint relocation and amount of energy consumed in particular movements depends mainly on the drive control. Leg control is proposed in such way that the leg can be considered as independent system.
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Using Q-learning for four-legged robot walking control
Březina, Tomáš ; Houška, P. ; Singule, V.
Significant goal in walking robot design is realization of autonomous system which is capable of motion in unknown environment. One of the possibilities how to reach necessary adaptability of control system without modeling of complex and unpredictable cases of system behaviour is the application of machine learning. From various learning paradigms the Q-learning is particularly attractive.
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Determination of Q-function optimum grid applied on active magnetic bearing control task
Březina, Tomáš ; Krejsa, Jiří
AMB control task can be solved using reinforcement learning based method called Q learning. However there are certain issues remaining to solve, mainly the convergence speed. Two-phase Q learning can be used to speed up the learning process. When table is used as Q function approximation the learning speed and precision of found controllers depend highly on the Q function table grid. The paper is denoted to determination of optimum grid with respect to the properties of controllers found by given method.
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