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Robust Ladder Climbing with a Quadrupedal Robot: A Game-Changing Development in Robotics



Breakthrough in Ladder Climbing Technology: Quadruped Robot Sets New Record for Speed and Efficiency
A team of engineers from ETH Zurich has made a significant breakthrough in ladder climbing technology by developing a quadruped robot that can ascend ladders faster than any other robot, bipedal or quadrupedal. The ANYmal robot, which was initially introduced in 2017, has been modified to include hooked end effectors that allow it to apply both compressive and tensile force to the rungs of a ladder, stabilizing its center of mass while climbing. This innovative technology has resulted in a 90% success rate at ascending ladders ranging in angle from 70 to 90 degrees, with the robot climbing those ladders 232 times faster than any other ladder-climbing robot.

  • The ANYmal robot has been modified to tackle ladder climbing by ETH Zurich engineers.
  • The robot uses hooked end effectors to apply force to ladders and stabilize its center of mass.
  • A reinforcement learning approach was employed to train the robot to utilize the hooked end effectors effectively.
  • The modified ANYmal robot achieved a 90% success rate in ascending ladders ranging from 70 to 90 degrees.
  • The robot climbed ladders 232 times faster than any other ladder-climbing robot.
  • The technology has the potential to greatly improve safety and productivity in industries such as manufacturing, gas plants, and mining.


  • The world of robotics has witnessed numerous breakthroughs in recent years, but none as significant as the recent development by ETH Zurich engineers in the realm of ladder climbing technology. The ANYmal robot, a quadruped robot that has been designed to perform various tasks such as walking, standing, throwing boxes, and even climbing stairs, has now been modified to tackle one of its most challenging obstacles: ladders.

    The current model of the ANYmal robot is equipped with sensors such as a 360-degree lidar module, six depth-sensing cameras, and two optical cameras. These sensors feed data into two Intel 6-core processors, allowing the robot to perform tasks autonomously in various settings such as factories, gas plants, warehouses, and even mines. However, one of the key limitations of the ANYmal robot is its inability to climb ladders due to their narrow rungs.

    To address this shortcoming, a team led by ETH Zurich roboticists Dylan Vogel and Robert Baines embarked on an ambitious project to develop a solution for the robot's ladder-climbing capabilities. They started off by swapping the robot's feet with four "hooked end effectors," which allow the bot to apply both compressive and tensile force to the rungs of a ladder, stabilizing its center of mass while climbing.

    However, simply providing the robot with these hooked end effectors was not enough; it also needed to know how to utilize them effectively. This is where the team employed what is known as a "privileged teacher-student reinforcement learning approach." In simple terms, this involves training a virtual teacher using a computer model in which all the variables (such as the ladder angle and rung spacing) are known, while also training a virtual student that mimics the teacher's behavior using nothing but chaotic "noisy" sensory information.

    The virtual student – which knows what to do thanks to the teacher, and how to do it best thanks to its sensory data – is then incorporated into the software that the actual physical robot uses to climb ladders. This complex process allowed the team to develop a sophisticated algorithm that enables the ANYmal robot to adapt to different ladder configurations and angles, providing a high level of efficiency and accuracy.

    The results of this innovative development are nothing short of remarkable. The modified ANYmal robot achieved an overall 90% success rate at ascending ladders ranging in angle from 70 to 90 degrees. What's more impressive is that the robot climbed those ladders 232 times faster than any other ladder-climbing robot, bipedal or quadrupedal.

    The implications of this breakthrough are far-reaching and significant. The development of a quadruped robot capable of climbing ladders with unprecedented speed and efficiency has opened up new possibilities for industries such as manufacturing, gas plants, and even mining, where access to hard-to-reach areas is often limited by the presence of ladders. This technology has the potential to greatly improve safety and productivity in these settings.

    In conclusion, the recent breakthrough in ladder climbing technology achieved by ETH Zurich engineers represents a significant milestone in the world of robotics. The ANYmal robot's ability to ascend ladders faster than any other robot is a testament to the ingenuity and innovation of the research team involved. As this technology continues to evolve and improve, it will undoubtedly have a profound impact on various industries and domains, paving the way for new possibilities and applications in the years to come.

    Related Information:

  • https://newatlas.com/robotics/anymal-quadruped-robot-climbs-ladders/

  • https://mikekalil.com/blog/anymal-fastest-ladder-climbing-robot/


  • Published: Wed Oct 16 07:06:08 2024 by llama3.2 3B Q4_K_M











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