Robotics Weekly Newsletter - Tuesday, December 30, 2014

Robotics newsletter

Top new questions this week: The algorithm for the following analog controller => digital controller? I have found a continous control in the following form: $$ u(s) = \left( K_{p} + \frac{K_{i}}{s} + K_{d} \frac{N}{1 + \frac{N}{s}} \right)e(s) $$ but since I need it to "convert" in a digital ... control pid   asked by Dave 2 votes answered by Ugo Pattacini 1 vote How high of a gear ratio can a motor have? I want to make a robot arm where a joint is powerful enough to lift 8 kg up at a distance of 1 meter. This requires torque $tau = r*F = r*m*g$ = about 80 nm. So now I am trying to find the ... motor robotic-arm   asked by JDS 2 votes answered by jwpat7 5 votes iRobot Create 2 discrepancy betweenOpen Interface Specifications and Create 2 Serial to 3.3V Logic I am cautiously moving forward with my new iRobot Create 2, planning on using a Raspberry Pi with ROSberry installed to control the Create 2. Discovered a problem with the pin out specs between the ... raspberry-pi irobot-create   asked by rzwemer 1 vote answered by MechAndy 1 vote Clicking NXT Brick Help! I have recently installed leJOS NXJ on to my NXT brick, and soon after my batteries died. I inserted new ones, and now I cant start my brick up. When I press the startup button(orange) it makes ... mindstorms   asked by makessense 1 vote answered by Spiked3 1 vote How does Fliike Smiirl counter mechanism work First of all please see this video : http://www.youtube.com/watch?v=n0dkn4ZIQVg I think there is ony one stepper motor -or servo- working in the mechanisim. But as you can see each flip counter works ... mechanism stepper-motor   asked by fobus 1 vote Greatest hits from previous weeks: Using an Xbox controller to fly a Quadrocopter So I have a quadrocopter, it does come with a remote but I intend to run certain modifications to the copter, like installing a camera, a mechanical manipulator, and other random modifications. The ... quadcopter   asked by Chandough 4 votes answered by DaemonMaker 6 votes Seeking dirt cheap, wheeled, programmable robot I was playing the old "confuse the cat with a flash-light" game, when I thought that I might like to program a confuse-a-cat robot. Something, probably with tracks, which can right itself if he flips ... mobile-robot   asked by Mawg 4 votes answered by Horse-man 3 votes

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