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Questions tagged [mobile-robot]

A robot which is capable of moving from one place to another, usually of its own volition.

5
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2answers
184 views

Adhesion for a heavy wall-climbing robot

I have come across a number of methods for developing wall-climbing robots. Suction Chemical Adhesion Gecko like hair adhesion Electroadhesion Which method would be the best for heavy robots (5kg+)? ...
6
votes
1answer
152 views

How do I design for a target speed?

I need to make an omni wheeled robot platform (4 wheels), which should go at a minimum speed of 15 cm/s. I have an idea for the design, but since this is my first time doing something like this I ...
8
votes
2answers
684 views

Are power and torque required related in some way?

I am designing a new platform for outdoor robotics and I need to calculate the power and/or torque that is needed to move the platform. I have calculated that I need about 720 W of total power to move ...
1
vote
1answer
751 views

Using a Sick laser with Matlab in Windows

Is there a Matlab toolbox available to use Sick lasers in Windows? I found one toolbox for Matlab in GNU/Linux. Is there another way to use Sick laser via Matlab in Windows?
6
votes
2answers
342 views

Measuring speed of movement in Webots

I have been experimenting with different fitness functions for my Webots robot simulation (in short: I'm using genetic algorithm to evolve interesting behaviour). The idea I have now is to reward/...
10
votes
2answers
1k views

Sonar for obstacle avoidance: how many sensors and where to place them?

For avoiding obstacles during 2D robot navigation what is the best position/angle to place the sonar sensors? How many should there be? I would like to know if there is some theory or examples for ...
6
votes
4answers
266 views

How to find out how far a motor has taken a vehicle?

I have a small motorized vehicle with gears as wheels running up and down a track made of gear racks. How can this robot know when it has run half the track? And what's the best method to keep it from ...
13
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3answers
4k views

Do “nano bots” (that can fit inside the human body) actually exist?

I was wondering, do we have real nano bots, like the ones in the movies? I think we have bots which can move through the blood vessels, am I right?
12
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5answers
1k views

What are the reasons for not having autonomous robots in our daily activities?

The fact is that the more I search the less I find autonomous (real) robots in use. The companion robots are all toys with limited useless functionality. Whenever there is a natural disaster you don’t ...
12
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2answers
3k views

Differences between Ackermann steering and standard bi/tricycles concerning kinematics?

I got the following homework question: What are the general differences between robots with Ackermann steering and standard bicycles or tricycles concerning the kinematics? But, I don't see what ...
9
votes
3answers
2k views

Quadruped Learning Simulator

I'm currently building a robot with four legs (quadruped), 3 DOF (Degrees of Freedom) and Its been suggested here that I use a simulator to do the learning on a computer and then upload the algorithms ...
71
votes
4answers
11k views

Why are Mars rovers so slow?

Mars rovers are typically very slow. Curiosity, for example, has average speed of about 30 meters per hour. Why is it designed so slow? Is it because of some specific power restrictions or for other ...
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2answers
276 views

Lightweight, commercially available robotic arms [closed]

I was wondering what options are there in terms of lightweight (< 5 lbs) robotic arms. I see Robai Cyton Gamma 300, and CrustCrawler AX18 look like interesting options. What lightweight arms do ...
6
votes
2answers
226 views

Protecting electronics against voltage/current extremes and bad polarity

I have built a robot from a wheelchair that has worked very well thus far. It is now time for me to take the next step. I need to implement a permanent power circuit with proper protection. The ...
25
votes
6answers
22k views

What algorithm should I implement to program a room cleaning robot?

For this question assume that the following things are unknown: The size and shape of the room The location of the robot The presence of any obstacles Also assume that the following things are ...
12
votes
1answer
1k views

How to get two continuous tracks (tank treads) to move at the same rate?

I've got a couple Vex 269 Motors hooked up to an Arduino Duemilanove. These motors run a some Vex Tank Treads. The two motors are run as servos on the Arduino using the Servo Library. The problem I'm ...
17
votes
3answers
2k views

Why do Mars rovers designers prefer wheels over tracks?

Typically Mars rovers use wheels and not tracks. I guess Spirit would have better chances getting out of that soft soil should it have tracks. In general, Mars surface structure is not known in ...
16
votes
2answers
17k views

Wheels vs Continuous Tracks (Tank Treads)

I'm building a small robot using some cheap Vex Robotics tank treads. However, my choice of picking tank treads is almost purely based on the fact that they seem like more fun than wheels. I don't ...
3
votes
2answers
154 views

Collaborative Behavior: Implementing a Bucket Brigade With Robot Arms

I was wondering whether something like this is possible: A block of ice(say) needs to be transferred piece by piece from a source to a destination with the help of 5 robots standing in a straight line ...
5
votes
1answer
194 views

Is it possible to use Matlab “system” function to call ROS commands?

Is it possible to use the Matlab's system function to call ROS commands? For example, using ...
8
votes
5answers
1k views

Strategies for managing power on electrical systems for mobile robots

What are some good strategies to follow while designing power supply for electrical systems on mobile robots? Such robots typically comprise of systems with microprocessor, microcontroller, DSP, etc ...
11
votes
1answer
2k views

How can the dynamic effects of motor current on a digital compass be characterized and compensated for?

Digital compasses (magnetometers) require a hard/soft iron calibration in order to be accurate. This compensates for the magnetic disturbances caused by nearby metal objects -- the robot's chassis. (...
6
votes
3answers
933 views

Visual Odometry options? [closed]

What are the pros/cons of the different visual odometry options? Stereo Camera Optical Flow SLAM other? Criteria: how well it performs vs other odometry options/sensors (lidar, radar) sensor ...
4
votes
1answer
155 views

IPC-Bridge problem

Is anyone able to help me out getting IPC-bridge working on my ubuntu lucid installation (with matlab 2012a)? I'm not being able to finish the last step on here (Compiling the messages folders): https:...
11
votes
2answers
2k views

Correct way to use Subsumption Architecture with Robot C

I've been doing a lot of reading lately about Subsumption Architecture and there are a few different ways people seem to advocate. For instance some people use a global "flag" variable to have a ...
26
votes
5answers
51k views

Which type of actuator will be suitable for a very strong robot arm

I wish to build a robotic arm that can lift a useful amount of weight (such as 3-6kg on an arm that can extend to approx 1.25 meters). What actuators are available to accomplish this. The main factors ...
5
votes
6answers
543 views

Effectiveness of a Mobile Robot In Relation To Mass

Do mobile and/or autonomous robots become more or less effective the bigger they get? For example, a bigger robot has bigger batteries, and thus bigger motors, whereas a smaller robot has the exact ...
6
votes
1answer
3k views

Technology behind Kiva Systems mobile robots

What kind of sensors and algorithms are the mobile robots of Kiva Systems equipped with?
12
votes
2answers
832 views

Is it better to have weight distributed over the wheels or the center of the robot?

When designing a standard 4 or 6 wheel robot, is it better to have the weight distributed primarily in the center of the robot, or over the wheels, or is there no difference? Specifically, which ...
22
votes
4answers
12k views

How should emergency stops be wired?

Emergency stops are obviously a good idea on most robots, how should they be wired? What systems should be killed immediately, and what should stay working?
29
votes
3answers
7k views

What is a suitable model for two-wheeled robots?

What is a suitable model for two-wheeled robots? That is, what equations of motion describe the dynamics of a two-wheeled robot. Model of varying fidelity are welcome. This includes non-linear models,...
4
votes
2answers
3k views

Mechanical design for motorized spherical caster wheels

Design goal is to have a mobile robot that operates on 3 large casters, essentially 2 to 4 inch diameter steel ball bearings, that are motorized. No other mechanism would touch the surface. The robot ...
8
votes
2answers
3k views

Shape Memory Alloy wire for robot gripper arm actuation: How to vary grip pressure?

For a robotic gripper arm we are designing for factory floor use on very small components, we propose to use electrically activated Shape Memory Alloy (SMA) wire harnesses for actuation. The device ...
12
votes
3answers
7k views

Calculating the efficiency of Mecanum wheels

I'm part of a FIRST Robotics team, and we're looking into using Mecanum wheels for our robot. What are the advantages and disadvantages of using Mecanum wheel versus regular ones? From looking ...
-3
votes
2answers
744 views

Mobile robot localization in a known map [closed]

I want to localize a mobile robot equipped with a 2D laser scanner in a known indoor environment. The map is a 2D occupancy grid, but is not perfect. What algorithms are appropriate for mobile robot ...