Tricks and tips for everyone


What is a Cubli?

What is a Cubli?

The Cubli is a one degree of freedom robot that can jump up and balance on its corner. The reaction wheels mounted on three faces of the cube rotate at high angular velocities and then brake suddenly, causing the Cubli to jump up.

How does the Cubli work?

Cubli is a 15×15×15 cm cube designed with the sole purpose to balance on a corner. The robot uses a unique 3-D inverted pendulum system that enables the robot to jump and balance. The system functions by rotating wheels at high speed to create angular momentum, forcing the cube up on an edge.

Who invented Cubli?

by Gajan Mohanarajah and Markus Waibel My colleagues at the Institute for Dynamic Systems and Control at ETH Zurich have created a small robotic cube that can autonomously jump up and balance on any one of its corners .

How do reaction wheels work?

Reaction/momentum wheels are flywheels used to provide attitude control authority and stability on spacecraft. By adding or removing energy from the flywheel, torque is applied to a single axis of the spacecraft, causing it to react by rotating.

How do m blocks work?

M-Blocks are small cubes (5 cm on a side) that have no external actuators, yet they manage to move and even jump. They do this by rotating an internal mass at high speeds then stopping that mass suddenly, which transfers inertia to the cube causing it to move.

Why do reaction wheels fail?

Failures of the Kepler, Dawn, Hayabusa, and FUSE space probes were due to failures of the reaction wheels in the spacecraft. These failures, in turn, were caused by space weather. Specifically, coronal mass ejections from the Sun.

Do reaction wheels really work?

They provide a high pointing accuracy, and are particularly useful when the spacecraft must be rotated by very small amounts, such as keeping a telescope pointed at a star.

What are m blocks?

M-Blocks are reconfigurable, modular robots with no external moving parts, built by research scientists at MIT. The cubes’ ability to move results from harnessing the momentum of an internal …

What are swarm robots used for?

Current uses for robot swarms include search and rescue, precision agriculture, supply chain management (SCM) and military reconnaissance. Swarm robotics attempts to draw on the ways social organisms, such as insects, use collaborative behaviors to achieve complex tasks beyond any individual’s capability.

Do rockets use reaction wheels?

A reaction wheel (RW) is used primarily by spacecraft for three-axis attitude control, and does not require rockets or external applicators of torque.

Is a reaction wheel a gyroscope?

I’ve probably used the terms reaction wheels and gyroscopes interchangeably in the past, but they serve slightly different purposes. First, let’s talk about reaction wheels. These are a type of flywheel used to change the orientation of a spacecraft.

Who invented swarm robots?

Swarming robots that can act in concert and mimic the behavior of bees have netted James McLurkin, a 30-year-old doctoral candidate in computer science, the annual Lemelson-MIT Student Prize.

How much do swarm robots cost?

Each robot costs $50 when not mass produced, and the setup requires a high-speed projector that costs roughly $600, plus the price of the computer and radio station.

Do gyroscopes defy gravity?

Gyroscopes can be very perplexing objects because they move in peculiar ways and even seem to defy gravity. These special properties make gyroscopes extremely important in everything from your bicycle to the advanced navigation system on the space shuttle.

Are reaction wheels real?

Are reaction wheels always spinning?

A reaction wheel is sometimes operated as (and referred to as) a momentum wheel, by operating it at a constant (or near-constant) rotation speed, to provide a satellite with a large amount of stored angular momentum.

Are reaction wheels gyroscopes?

Here’s the quick answer. Reaction wheels allow spacecraft to change their orientation in space, while gyroscopes keep a telescope incredibly stable, so they can point at a target with high accuracy. If you’ve listened to enough episodes of Astronomy Cast, you know I always complain about reaction wheels.

Do humans have swarm intelligence?

Human Swarming has been shown to enable groups to reach optimized decisions, prioritizations, and forecasts in significantly less time than traditional methods. In other words, thinking together in swarms makes groups smarter and faster.

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