# Tag Info

## Hot answers tagged mobile-robot

Accepted

### What is the difference between path planning and motion planning?

Compare the following two images: The path planning is somewhat trivial. There's only one path: the rope. The motion planning on the other hand is not that easy. In a maze the path planning is hard ...
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### How to program a three wheel Omni?

The math involved for controlling a holonomic robot is really not too bad. It is basically just high-school trigonometry and knowing how to set up the problem. First, lets start with the joystick. ...
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### What is the difference between a holonomic and an omnidirectional robot?

Holonomic is a precise mathematical term; one definition is velocity constraints can be integrated into the form \begin{align} f(q1,q2,...,t) = 0. \end{align} Roughly, that means the ...
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### Seeking dirt cheap, wheeled, programmable robot

Did you say dirt? May I recommend a Roomba? It has wheels and tracks. A cat wouldn't be able to flip it over. It already knows how to move randomly around a room, turning at walls. It already makes ...
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### Finding Center of Mass for Humanoid Robot

Yes. As @hauptmech mentioned, you can use your forward kinematics to get the center of mass of each link in the base frame. Then you can simply compute the weighted average of the masses and ...
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### Motor Choice given size constraint and load requirement

If you have some budget for your project, both Maxon and Faulhaber have good DC motors and motor-gearhead combinations. Maxon publishes a nice set of formulas and background theory on electric motors....
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### How many robots is considered to be a robotic swarm not a group of robots?

A robot swarm is defined by its behaviour, rather than the number of robots it contains. Swarm robots: "... are coordinated in a distributed and decentralised way" [Iñaki Navarro and Fernando ...
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### How exactly does sensor fusion work in Kalman filters?

I realize this question already has an accepted answer, but I'd like to provide some additional input. The question of sensor fusion is a good one, but, depending on the application, you don't ...
• 106
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### Which micro-controler/processor to be used for autonomous stereo vision robot system?

Stereo vision and SLAM are pretty heavy algorithms, both in terms of the processing power and RAM required. You can forget about running this on a little microcontroller like an Arduino. These run at ...
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### What is the maximum payload weight for create 2/can I use old create accessories with the Create 2?

Assuming that you keep the payload in the bin or near the top of the robot, 9 kg is a safe amount of max payload weight on a flat floor. Create doesn't dynamically balance, so having the weight in ...
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### What is the difference between path planning and motion planning?

What's the difference between turn-by-turn GPS and driving a car? GPS is path planning: high-level commands like, "turn right in 1 mile." Driving is motion planning, which means following a route ...
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### Why would a drone need a magnetometer? Are an accelerometer and a gyroscope not sufficient?

The main difference between accelerometer and gyroscope vs magnetometer is that first two give only relative information - you may calculate heading relative to your starting position, but you won't ...
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### Stabilising an inverted pendulum

There are lots of ways to solve this problem, which falls into the category of Control Engineering. There are two standard approaches: Classical Control: The control command has to be proportional ...
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### Motor Choice given size constraint and load requirement

20kg is a mass. It makes a force on Earth (20*9.81 = 196N), but that's not a torque. Motors make torque - what is your maximum torque specification? Once you know how much torque you need (that will ...
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### Is there any robot stability control equation that describes the relation between velocity of the robot and its orientation?

That's not obvious. If I'm in a tank, going 0.5 km/h, I don't need to slow down at all. If I'm in a bobsled going 100km/h and the track banks, I don't need to slow down at all. When you steer, you ...
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### Which is a good and cheap 3D LIDAR or other options?

There are now some sub and around ~1000USD 3D Lidars available. I wanted to provide an answer for future reference if anyone else comes looking for "cheap" Lidars. LeddarTech M16 ~500 USD ...

### Alternative to ROS?

I think you are getting confused between the basic ROS possibilities and some more advanced libraries which are integrated but do not need to be used by users without 'advanced' requirements. If you ...
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### What's the difference between Pose Measurement and Position Measurement?

what you are looking for is written in the paper. Position refers only to x,y,z translational measurements while pose means position and orientation.
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### What is the technical name when robot wheels are aligned to perform spot turn?

Looks like wikipedia calls it Active Four-Wheel Steering. Although, what you're talking about is the left and right side steering opposite of each, whereas Active Four-Wheel Steering in automobile ...
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### Seeking dirt cheap, wheeled, programmable robot

You haven't define what's the limit of your budget. However, for cheap programmable robots you can use: the DFRobot 2WD Mobile Platform and interface it with an Arduino Uno. You can also use a Pololu ...
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