ETD system

Electronic theses and dissertations repository


Tesi etd-02032016-184609

Thesis type
Tesi di laurea magistrale
Design, development and control of a soft robot for object manipulation in Amazon factory-like environment.
Corso di studi
relatore Prof. Bicchi, Antonio
Parole chiave
  • softhand
  • pick and place
  • motion planner
  • vincoli ambientali
  • strategie di approccio
  • VSA
  • environmental constraints
  • grasp strategies
Data inizio appello
Riassunto analitico
In last years robotics took advantage of a strong improvement in hardware design which produced a new technology, called soft robotics, based on new actuators that can modulate their own compliance and have a safe interaction with unstructured environments.

Soft robots compete in DARPA Robotic challenge where humanoid robots attempted to execute operations, in a simulated and real scenarios, WALK-man by IIT and University of Pisa, but are also used in industry, ABB company introduced a new soft gripper to handle fragile things.

The Soft Robotics certainly has potential but also posed new challenges at planning and control level, researchers propose different approaches to solve problem but, at moment, it represent an open issue.

In this thesis we investigated one of most interesting rising approach take advantage of softness which regard the exploitation of environment constrain (EC) like an help on performing grasp and/or manipulation tasks.
We designed a \textit{Pick 'n Place} manipulator composed of Variable Stiffness Actuators (VSA) and an end-effector call Pisa/IIT SoftHand, an underactuated anthropomorphic hand with 19 DOF but only one motor. Moreover we provide a three-dimensional depth sensor mounted on top of mechanical structure which gives us geometry of actual scene.

In the first part of the thesis, we analyzed how Pisa/IIT SoftHand works in specific situations through empirical experiments, we used Handle device to approach objects in a human-like way and gathered informations in a grasp database, in next step we elaborated manipulation strategies based on previous result and a set of objects with various dimensions. After a study on observed strategies we summarize them in subgroup which depends on objects properties.
In last stage, we tested new approached in a constrained environment which is represented by the Amazon shelf and present result.
As a case of study we participate at \textit{Amazon Picking Challenge}, in this competition the robot challenged other teams in a \textit{Pick 'n Place} task.