Control of a CableDriven Parallel Robot via Deep Reinforcement Learning Deep reinforcement learning (DRL) introduces deep neural networks to solve reinforcement learning problems. DRL is suitable for sequential decisionmaking applications and has been used to solve a variety of robot manipulation tasks recently. This paper applies a DRL algorithm named deep deterministic policy gradient (DDPG) to control a cabledriven parallel robot (CDPR) for the first time. Besides the control of a CDPR, this study investigates the ability of DDPG to learn the optimal tension distribution of the CDPR and the robustness of DDPG to certain model uncertainties of the CDPR. Simulation results show that DDPG can not only control the CDPR but also learn the optimal tension distribution of the CDPR.

Robot Control in Human Environment using Deep Reinforcement Learning and Convolutional Neural Network Deep reinforcement learning (DRL) has been employed in numerous applications where complex decisionmaking is needed. Robot control in a human environment is an example. Such algorithm offers possibilities to achieve endtoend training which learns from image directly. However, training on a physical robotic system under human environments using DRL is inefficient and even dangerous. Several recent works have used simulators for training models before implementing to physical robots. Although simulation provides efficiency to obtain DRL trained models, it poses challenges for the transformation from simulation to reality. Since a human environment is often cluttered, dynamic and complex, the policy trained with simulation images is not applicable for reality. Therefore, in this paper, we propose a DRL method to achieve endtoend training in simulation, as well as to adapt to reality without any further finetune. Firstly, a Deep Deterministic Policy Gradient algorithm (DDPG) is employed to learn policy for robot control. Secondly, a pretrained Convolutional Neural Network algorithm (CNN) is used to visually track the target in image. This technique provides the efficient and safe DRL training in simulation while offering robust application when a real robot is placed in dynamic human environment. Simulation and experiment are conducted for validation and can be seen in the attached video. The results have shown successful demonstration under various complex environments.