Blog Archives

The most common places to shop for robotics components

This time I would like to review the most used online shops to buy components for a robotic design. Some of them are more focused on the professional market and some others pay attention to the hobbyist. The two main

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Posted in Robotics

Magnetic Encoders VS Optical Encoders

Encoders, whether rotary or linear, absolute or incremental, typically use one of two measuring principles—optical or magnetic. While optical encoders were, in the past, the primary choice for high resolution applications, improvements in magnetic encoder technology now allow them to

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Posted in Robotics, Sensors

Notes on encoder resolution for velocity control of motors

The simplest velocity estimation method is the Euler approximation that takes the difference of two sampling positions divided by the sampling period. Typically the position measurements are taken with encoders or resolvers which contain stochastic errors which result in enormous

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Posted in Actuators, Robotic devices, Robotics

Main telerobotic platforms

Main telerobotic platforms

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Posted in Robotic devices, Robotics

Dynamic modelling of robots: parameters identification (II)

Hi! In this post I will explain the method for obtaining a set of equations to be able to identify the dynamic model of robot composed by several links even in presence of closed loops. In the previous post I detailed

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Posted in Robot Dynamics, Robotics

Force estimation with Luenberger-Sliding observers

Two lines are showed in the upper image of this video. In blue, the estimated total force and in red, the measured force. This video shows how the Luenberger-Sliding observer manages to estimate external forces during a compression task. Sliding

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Posted in Control for teleoperation, Force Estimation, Robotics

Dynamic modelling of robots: parameters identification (I)

In this post I describe the initial steps to identify the parameters of a robot with either open or closed chain.

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Posted in Robot Dynamics, Robotics
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