"Cheetah," a new robot designed by MIT researchers, may soon surpass the efficiency of the animal. In the test on the treadmill, the researchers found that in fact the cheetah wasted little energy because it can reach a distance of 8 kilometers by one and a half hours of trot. It is reported that the key to the "Cheetah"'s streamlined stride is that its light weight, the electric motor is again set to its shoulders, so only a small amount of heat is generated, while the high torque generated wasted.The motor can be programmed to respond to The legs of the robot are quickly adjusted externally so as to achieve a certain stiffness and cushioning force, such as when the current route is suddenly changed. So far, the institute's researchers will display the efficiency results and design principles of the electric motors they counted at the International Robot Automation Conference in May.
Sangbae Kim Jong-Il of the Massachusetts Institute of Technology's mechanical engineering department said that in fact, the realization of energy-efficient legged robots has proved to be very difficult, such as Boston's dynamic "big dog" robots, which need to carry heavy gasoline engines and hydraulic transmissions. While other electric robots are more in need of large battery packs, gear sensors, force sensors and springs coordinated at the robot's leg joints. All of this heavy set-up is a huge waste of energy, especially when a robot's legs have to be in frequent contact with the ground. Therefore, a robot that consumes less energy can be said to be one of the current research priorities.
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