Questions tagged [design]
Mechanical, electronic or programmatic design of a robot.
147
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Stewart platform as robotic wrist joint
I'm planning the design of a wrist for a humanoid robot. I would like to choose a design that is sturdy while allowing for dexterity comparable to a human wrist.
One option that was presented to me ...
Ben♦
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What is the cheapest way to detect and identify vehicles entering a gate in real time?
I want to detect and identify each of the vehicles passing through a gate.
I have the live video feed of the gate which I initially thought to process and detect the number plates with the help of ...
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Artificial Intelligence Software Packages: Professionals, University education is oft' a step behind. What's actually being used? [closed]
Currently using Windows 8, what software packages for artificial intelligence programming (robotics branch) are used in today's professional environment as standard. Lots of internet suggestions, but ...
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idea for web application in robotics [closed]
I am learning and I am interested robotics, but also I need to update my web development skills so the question is - is there any idea for good web application that could be connected with robotics - ...
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Quadcopter frame design
Quadcopter frames seem to consistently follow the same X design. For example:
I'm curious to know why that is. It certainly seems like the most efficient way to use space but is it the only frame ...
CommunityBot
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Mechanical design for base of robotic arm [closed]
I am using DC motors to build a robotic arm. I want to make the base shoulder (which rotates and lifts) more stable and stronger. How should I design this using DC motors?
Also I would like to put ...
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Programable Drone with robotic arm and hand?
I was just wondering if it was possible to buy or build a programmable drone with a robotic arm,hand, knife.
I want to program a drone to harvest crops.
-object recognition from live video stream to ...
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How to distribute tension load on a three footed claw?
Good day!
I am helping my little ones 6 and 7 to develop a robot that can pick up and stack cubes three high as well as gather blocks. They came up with the design that enables them to pick up ...
CommunityBot
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What are the calculations for a badminton robot and mechanisms?
I am designing a badminton robot but i am very confused about mechanisms needed for a badminton robot and various calculations needed for millisecond response.I am also confused about calculations ...
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Square with hinge on all four sides
I want to make a component that will be a square plate that will behave like it has a motorized hinge on all four sides. That is, it can "open" by pivoting around any one of its four sides. I want it ...
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How important are events like "Robocup" to the advancement of Robotics in general?
Are events like Robocup advantageous to the development of robotic advancement?
Or is it merely entertainment which advances robotics by allowing entry level participation which helps maintain ...
CommunityBot
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Verifying motor selection calculations
I'm trying to select a brushed DC motor for a project. I tried following the advice on sizing electric motors, mentioned in this question, but a few details were missing, and I'm unsure if I properly ...
CommunityBot
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What is the cheapest way to make led sensitive to sound around?
There is always a way to do this using arduino, rasberry pi etc. However, in many cases in discussion in forums i've come across things where whole 'logic' can be uploaded to $0.50 chip. Instead of $...
CommunityBot
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PCB making at home [closed]
I've made many PCBs at home but still there are some mistakes. I tried ironing, drawing methods but it doesn't work very well. I use eagle CAD for design PCBs. Please help me.
Ben♦
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Why Make Bipedal Robots?
A friend and colleague of mine who studies robotics says that bipedal robots present much greater challenges for stability and locomotion than those with more legs.
So why is there so much effort to ...
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Is it better to have batteries distributed at the rotors or the center of the multicopter?
I've seen 3 approaches to mounting batteries on a multicopter:
All the batteries rigidly mounted near the center of the airframe
All the batteries in a bag hanging under the center of the airframe
...
CommunityBot
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Submarine screw and the isolation from the water [duplicate]
How does the submarine prevent water flow through the screw mechanism? The mechanism rotates the screw so there should be a little gap, how come the water doesn't come through this gap in to the ...
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Linear slider motor mount location - Pros/cons
I'm currently designing a linear camera slider, that will be used to hold camera equipment weighing just about 15 Kgs including all of the lenses and monitors and everything else.
For those who don't ...
CommunityBot
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Design Calculations & Mathematical Modeling of Tricopters
I have been studying about building a tricopter. But I couldn't find the design calculations or mathematical modeling of the tricopter any where over the internet.
What are the mathematical ...
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Autodesk Inventor 2013: Rounding only at specific edge
I am using Autodesk Inventor 2013 and I need to round a component of a device. I want to round the green marked edges, but not the red marked. But when I click "round", then the bottom edge will ...
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Gears in Autodesk Inventor are looking weird
I use Autodesk inventor professional 2014. I design my gears using the design accelerator. However, whenever I create gear trains, parts of certain gears become transparent. This seems completely ...
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Alternative way to perform Pole zero cancellation?
I've read a lot places that making a controller which cancels the unwanted pole or zero is not good designing practice for designing a controller..
It should make the system uncontrollable which off ...
CommunityBot
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LQR design with low effort
I am trying to implement a controller for an inverted pendulum using LQR (with MATLAB command lqr(A,B,Q,R)). The problem is that the motors are relatively weak, so I tried to increase R, but ...
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What happened to Butler's car?
Having read the article "This Car Has Electric Brains" in Popular Mechanics, August 1958 I have some questions.
How practical were his methods? Was his work acquired by a car manufacturer or some ...
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Getting started with robotic arm design
I would like to design a robotic arm to hold a weight X at length Y (in my case I want to hold X=2.5 lbs at Y = 4 inches). Starting out simply, I would like try building an arm with a gripper plus one ...
Ben♦
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What do quadcopter propeller specifications mean?
I'm trying to figure out the diameter of tri-blade propellers.
I found a 7x3x4.5 blade, I'm trying to understand the measurements. Is the '7' the length of the blade giving the prop a 10.5" diameter? ...
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Gears modeling in Google SketchUp and SketchyPhisics
I'm trying to make differential in Google SketchUp using this tutorial http://support.ponoko.com/entries/21249896-Gears-and-Joints-with-SketchUp-Sketchy-Physics for gears modeling.
But I have problem: ...
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How can I control a fast (200Hz) realtime system with a slow (30Hz) system?
We are currently designing a mobile robot + mounted arm with multiple controlled degrees of freedom and sensors.
I am considering an architecture in two parts:
A set of realtime controllers (either ...
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Aluminum vs Carbon Fiber
So building a quadrocopter from scratch HAS a lot of decision making, and I need some input on the material choice.
I have short listed Aluminum and Carbon Fiber for the Arms and support of the ...
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Emulation of an Orrery
Orrery is a clockwork model of the solar system. I am trying to emulate one in 2D. Now, to emulate, I need to know what goes on inside. Can someone please explain the basic principle behind the ...
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How to know the desired orientation of a quadcopter?
I am trying to simulate a quadcopter model on Simulink. I want to implement a PID controller for each of X,Y,Z and phi,theta, psi angles. PID gets the error, as input, which is to be minimized.
For ...
CommunityBot
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Why are quadcopters more common in robotics than other configurations?
I've noticed that almost all research being done with helicopter robots is done using quadcopters (four propellers). Why is there so little work done using tricopters in comparison? Or a different ...
CommunityBot
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How to open a sliding window?
I live in an apartment that has sliding windows in it. The apartment is naturally warm because we live above a mechanical room, such that we either opened the windows or ran the air conditioning ...
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Is finished plywood a comparable prototyping substitute for polyoxymethylene?
I'm working on a robot with a team, and we're building our robot out of acetal polyoxymethylene (POM) (specifically, delrin) plastic. However, we'd like to prototype the robot before we build it out ...
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What modelling tools are available to design a robot [closed]
I am planning to build a robot.
1) What free or low cost robot modelling tools exist.
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Drone targeting
Imagine a "drone" and a target point on a 2d plane. Assuming the target is stationary, there are eight parameters:
...
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Most material efficient quadcopter frame
I haven't made or flown any quadcopter, but I am fascinated by them.
But when looking at the frame of a lot of designs, after whachting this video I wondered why a lot the frames are in an X shape. ...
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How many amps do I want my Switching BEC to provide?
I'm trying to power 7-12 servos, and I was under the impression that each one would need about an amp, but in looking around for an appropriate BEC to supply them, I notice that most seem to output ...
CommunityBot
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Dynamic braille interface
I'm a newbie in robotics, and I'm doing a project on dynamic Braille interface. Basically it's a 8*8 array of pins, which can be either totally up or down. How to use least motor as possible?
I'm ...
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When should FPGAs be used in Robotics?
FPGA has good points such as a lot of IO points but then again you need to think things on very low level with flip-flops and pioneer on areas where things are not yet mature -- for example see this ...
CommunityBot
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Equation to limit rate of change of end-effector in X and Y coordinates
Some vector math is involved here so prepare yourself.
I am developing a robotic arm that moves in two dimensions. It is a rotary-rotary design which looks roughly like the picture in this post:
...
CommunityBot
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Which is easier/cheaper: Hbridge vs ESC for controlling a motor?
I was able to find a small ESC for about $12 off of ebay. If you were designing a robot, would you see that and think?
\$12 bucks for an ESC that connects to simple pulse-wave interface -
sign ...
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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 ...
CommunityBot
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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 ...
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Good book on mechanisms [closed]
I am working with students (9th & 10th grade) on robotics and wanted to get a good book which covers basic mechanisms. Does anyone have any recommendations. Searching Google or Amazon yields ...
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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 ...
CommunityBot
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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 ...
CommunityBot
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