We present a state-feedback control of a two-link flexible-joint robot. First, we obtain desired control laws from Lyapunov’s second method. Then, we use three-layer neural networks to learn the unknown parts of the desired control laws. In this way, the control algorithm does not require the mathematical model representing the robot. We use a smooth variable structure controller to handle uncertainties from the neural network approximation and external disturbances. To show the effectiveness and practicality of this control algorithm, we performed an experiment on one of the robots in our laboratory.
Model-Free Trajectory Control of a Two-Link Flexible-Joint Robot: Theory and Experiment
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Chatlatanagulchai, W, & Meckl, PH. "Model-Free Trajectory Control of a Two-Link Flexible-Joint Robot: Theory and Experiment." Proceedings of the ASME 2005 International Mechanical Engineering Congress and Exposition. Dynamic Systems and Control, Parts A and B. Orlando, Florida, USA. November 5–11, 2005. pp. 1369-1377. ASME. https://doi.org/10.1115/IMECE2005-79582
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