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Signal Processing of IMU data within a hostile environment

Master thesis project

Working at Atlas Copco in Stockholm, Sweden, at Industrial Technique's global headquarters.

Functional area: Atlas Copco Industrial Technique, Mechatronics
Recruiting manager: Henrik Öhrlund, Manager Tool Embedded Software
Phone: +46 8 743 81 99
Email: henrik.ohrlund@se.atlascopco.com

Target

The goal for the project is to improve signal quality of the built-in IMU (inertial measurement unit) of the latest generation handheld battery driven tools via signal processing in e.g. Matlab and to compensate for known disturbances, e.g. gear type, current engine speed etc.

Background

When tightening a structural joint the goal is to achieve sufficient clamp force to carry external loads. To control and monitor a tightening process, it is common practice to measure torque or torque plus angle. If the tool moves during the final angle measurement, we must be able to compensate for this in order to still get the correct clamp force and this requires accurate IMU data. The IMU will also be used by other features in the future.

Mission

Your mission is to:
• Analyze recorded IMU data (i.e. gyro and accelerometer data) from different tightenings.
• Identify the tolerance needed for different functionalities, e.g.
o True Angle
o Pulse tools
o Positioning by means of inertial navigation
o Detect how the tools is held by the user in order to choose tightening strategy
• Identify and compensate for disturbances
• Design filters
• Design a test rig in order to verify the signal processing in real life

Qualifications

We are looking for 2 master thesis students with a background in signal processing, automatic control or similar with an interest in programming.

How to apply

About Atlas Copco Industrial Technique

Atlas Copco’s Industrial Technique business area provides, through a global network, industrial power tools and assembly solutions, including tightening, bolting, riveting, adhesive dispensing, quality assurance products, material removal, software and service. The business area innovates for sustainable productivity for customers in the automotive and general industries, maintenance and vehicle service. Principal product development and manufacturing units are located in Sweden, Germany, United States, United Kingdom, France, Japan and Hungary.

About the Atlas Copco Group

Atlas Copco is a world-leading provider of sustainable productivity solutions. The Group serves customers through its innovative compressors, vacuum solutions, generators, pumps, power tools and assembly systems. Atlas Copco develops products and services focused on productivity, energy efficiency, safety and ergonomics. The company was founded in 1873, is based in Stockholm, Sweden, and has a global reach spanning more than 180 countries. In 2017, Atlas Copco (excluding Epiroc) had revenues of BSEK 86 (BEUR 9) and about 34 000 employees.

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