Designing agile locomotion for quadruped robots often requires extensive expertise and tedious manual tuning. In this paper, we present a system to automate this process by leveraging deep reinforcement learning techniques. Our system can learn quadruped locomotion from scratch using simple reward signals. In addition, users can provide an open loop reference to guide the learning process when more control over the learned gait is needed. The control policies are learned in a physics simulator and then deployed on real robots. In robotics, policies trained in simulation often do not transfer to the real world. We narrow this reality gap by improving the physics simulator and learning robust policies. We improve the simulation using system identification, developing an accurate actuator model and simulating latency. We learn robust controllers by randomizing the physical environments, adding perturbations and designing a compact observation space. We evaluate our system on two agile locomotion gaits: trotting and galloping. After learning in simulation, a quadruped robot can successfully perform both gaits in the real world.

本文提出了一种利用深度强化学习技术自动化四足机器人运动设计过程的系统，能够从简单的奖励信号中学习四足运动，并可提供开环参考进行学习过程的控制，采用系统辨识来改进物理模拟器，利用物理环境随机与扰动设计控制器，并在物理模拟器中进行评估，成功在现实世界中部署。

Sim-to-Real: 四足机器人学习敏捷运动