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# Robotics : Recent Questions and Answers (Page 4)

## ROS sensor implementation

From this page, there are lots of sensors to be used in ros robots. http://wiki.ros.org/Sensors But, I could not install any of them to the robots in...

## Design optimization method using indices

There are several methods like manipulability and conditioning index for design optimization kinematics performance, but these methods rely on the singular values of the jacobian matrix. I described kinematics by...

## Why can't the Controller Spawner find the expected controller_manager ROS interface?

I have a quadruped robot with base link (BL), 4 child links called LFT, LFT, RFT, RFT, T for thigh and each having 4 children with name LFC, LBC, RFC,...

Asked on 11/28/2021 by Shubham Wani

## Bias correction for multiple sensor fusion through Kalman Filtering

I am learning Kalman Filters and was working on a simple example: Temperature measurement of a room by using 4 thermometers(different biases and noises) if i consider that there is...

## Why aren't my 4x 612 RPM motors driving with only 12 lb load?

I have purchased x4 612 RPM actobotics motors. Every time I try to drive the motors on ground, the motors stall, as if the torque was too low to drive....

## State propagation from uncertain control input

Consider a nonlinear system $x(k+1)=f(x(k),u(k))$, where $x(k)inmathbb{R}^{n}$ is the state, $u(k)inmathbb{R}^m$ is the control input. Here $u(k)$ is normally distributed RV with mean $mu_u(k)$ and...

Asked on 10/03/2021 by Astghik Hakobyan

## Inverse kinematics for 4-DOF Articualted manipluator

I am trying to find out the math formulas for Inverse Kinematics for a 4-DOF articulated manipulator. By Googling I...

## How to find inertia parameter of payload automatically

I know of several robot manufacturers who can perform automatic inertial measurement for 6 axis robots. Fanuc, for example, moves with axes 5 and 6 each from +180 to -180...

## output velocity equation of compliance control

I am trying to implement a compliance controller for a robot arm and stumbled upon an existing code snippet where the compliance velocity of the endeffector is calculated by: ...

## Bearing landmark localization

I am trying to initialize the position of a set of landmarks using only bearing observations. Each robot pose, described by position (x,y) and orientation (theta), observes a small set...