Bending Unit 22
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2 way Switch powerbar
1 votes

The idiot proof solution is not to have two cables.

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What is the top speed of a four legged robot?
0 votes

Can such a speed be reached by purely mechanical means? Yes, according to this: Felix Baumgartner [a four legged being, two of them called "arms"] who jumped from a height of 128,100 feet (39,000 ...

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Why people use camera instead of laser sensor for robot navigation?
3 votes

navigation in urban environments Depending on the laser, there might be legal constraints on where you can use it. Running around town throwing laser rays around might require special permission/...

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There seems to be so many robotic arms on the market, where can I get a list of pros/cons of each?
2 votes

There's no such list because if a property is an advantage or disadvantage depends on the application to a large degree. This holds true for a lot of things in engineering and life in general. You ...

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ROS : Performing 2-D Pedestrian Dead Reckoning on an AR Drone and displaying location on a floorplan
0 votes

using information from the IMU/accelerometers These sensors will accumulate error and will not provide a good estimate of the position of the drone after some time. What you need is some absolute ...

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What the name of this kind of computer vision?
Accepted answer
2 votes

The general term is "feature detection". But this is very broad. It basically means to find anything in an image that fits to some description. A feature could be a line, point, blob, etc. A detector ...

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Why are robots made to mimic humans actions? Isn't it better to make them better than Humans?
Accepted answer
6 votes

better you say ? That's a nice wheeled robot you have there. Can I borrow it for a day? Thanks. Wow, it's really fast, I cannot keep up with it walking or running on the street. Truly an amazing ...

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Help finding robot tracks
1 votes

This image appears to be coming from here. This "johnny robot gm track kit" is now sold as "Standard GM Track Kit": Or at least it looks very similar.

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12 volt input to 5 volt ouput of Arduino
Accepted answer
5 votes

Nobody can tell how much magic smoke is still in the device. You need a magic smoke detector (rarely also referred to as a "voltmeter"), hook one of its contacts up to the pin that should have 5 volts ...

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Lidar problems in a multi-robot setup
2 votes

I wouldn't recommend using sensors with different laser frequencies either, because that likely means using an entirely different product, with different accuracy and other properties. don't tilt, ...

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Can a robot or mechanical part be programmed to exert a specific force
1 votes

Yes you can. People built robots doing exactly that for several hundred years.

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Distance calculation with two robots and two obstacles
1 votes

Is it possible to calculate which side the robot is to the landmarks and the distance between each other? No, because the whole thing is point symmetric around the point in the middle between both ...

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Path planning vs. linear interpolation?
Accepted answer
2 votes

Path planning is essentially obstacle avoidance. If there are no obstacles, chances are path planning is Overkill. However, one obstacle that you always have and that is a constraint for the ...

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How to check for a sharp angle with a line follower?
Accepted answer
3 votes

It can't pass the 20 block if the robot enters it from a 15 or 20 block (so basically it gets stuck if it's coming from an angle and hits a 90 degree turn). Somehow coming from an angled line makes ...

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Quadcopter refuses to fly when the Yaw PID component is added
Accepted answer
1 votes

disclaimer: This is more of a longer comment than an answer. I'm not sure what the problem is. There is a lot going on here (thankfully a lot of information is provided, too) and my attention shifted ...

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ComputeShortestPath() in Dstar lite algorithm
Accepted answer
2 votes

The first relevant line is line 6: $$U.Insert(s_{goal}, [h(s_{start}, s_{goal});0]);$$ Basically speaking, this is an association of the goal to some vector with two values in it. Now $U$ looks like ...

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Mechanical odometer with digital output
1 votes

I don't think that an odometer is the right sensor for this task. The wheels will definetly slip. The error will add up quickly and the measurement will not be very good. These types of sensors are ...

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Robotic Arm analysis in Matlab/simulink
1 votes

The paper does not say anything about Subsystems. Does it mean that I can't implement it? This question implies that you don't really know what a subsystem is in the context of matlab. It's as if ...

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PID Control: Integral error does not converge to zero
Accepted answer
4 votes

I don't think this is related to integral windup at all. I noticed that the I-error does not converge to zero That's a good thing, because it means your integral term is not useless. The integral ...

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Trying to calculate the Thrust of my quadcopter motors
4 votes

Thrust is a force. You probably have a device in your house to measure force: a scale, so why not determine the thrust empirically? Build a little mount to place the prop on a scale securely. Tare ...

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What is the difference between path planning and motion planning?
Accepted answer
27 votes

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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Quadcopter stability vs (PID error signal lag and sample time)
1 votes

In general, a system that is "discrete" will always be less stable, the less samples per time, the less stable it will be. Imagine you are driving a car. You are only allowed to turn the steering ...

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Two DC motors and single output?
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0 votes

Reusing parts is a very important and common concept. Using the same DC motor 4 times means you have to deal with only one motor type. If you choose a 2nd type of motor for the roll, you have to ...

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Why are bipedal robots difficult?
Accepted answer
3 votes

If you can do well on simulations, you should be able to do it well in the real world. There's this lovely saying: In theory, there is no difference between theory and practice. And what that ...

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Two exclusive inputs control
3 votes

The system is nonlinear for acceleration. If the desired acceleration value is bigger than 0, use the throttle, if smaller than 0, use the break. Other than that, you should be fine using a cascaded ...

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How to sumarize Kalman filter covariances for display?
1 votes

You want to display $\frac{n(n+1)}{2}$ values of a symmetric $n \times n$ matrix, where $n=26$, which means you have 351 values. It doesn't make too much sense to display all those numeric values. ...

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Why the name "combinatorial"?
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0 votes

Let's take a look what combinatorics is all about: Combinatorics is a branch of mathematics concerning the study of finite or countable discrete structures. Cell decomposition (or any graph based ...

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Forward kinematics of constrained double pendulum
Accepted answer
2 votes

What you are describing is a crankshaft. if I attach a sliding block to the end of my second arm, I don't know whether my equation for $x_2$ would change at all. No it wouldn't, because your ...

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Forward kinematics: Why ω should remain same?
Accepted answer
1 votes

Recall that for a circle with radius $r$, the circumference $u$ (that is the arc length of the "curve") is given as: $$u = 2 \pi r$$ Further recall the definition or radians, which is something ...

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What commands make the irobot create 2 go left and right not just forwards and backwards?
2 votes

The documentation states on page 12: A Drive command with a positive velocity and a positive radius makes Room ba drive forward while turning toward the left. A negative radius makes ...

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