Nathan Ochem Logo Nathan Ochem

My Projects

Height-Adjustable System for Agricultural Robot

Context and Challenge

For the company OSIRIS Agriculture, the objective was to design and integrate a height-adjustable suspension system for their crop-irrigating robot. This mechanism had to allow the robot to pass over tall plants without damaging them, while maintaining a compliant road transport profile.

Objectives

My Role

Methodology

  1. Initial discussions with the client to clarify technical and functional requirements.
  2. Research and benchmark of existing lifting mechanisms.
  3. Concept evaluation through comparative analysis tables.
  4. 3D modeling and parametric design using CATIA V6.
  5. Numerical simulation and stress analysis with ANSYS Workbench.

Technologies & Tools

Mechanical sizing: supplier datasheets, strength of materials calculations.
Software used: CATIA V6, ANSYS Workbench, Excel, Word.

Lessons Learned

Strengthened skills in project management, mechanical sizing, and simulation-based validation.

Rugby Target Project

Context & Goal

In partnership with Stade Rochelais, the goal was to design a simulation device to optimize lineout training by faithfully replicating players’ movements and dynamics.

Front view

Front view

Right view

Right view

Isometric view

Isometric view

Objectives

My Role

Methodology

  1. Client discussions to clarify needs
  2. Survey of existing solutions and limitations
  3. Brainstorming, comparative decision table
  4. Calculations and 3D modeling in CATIA V6

Technologies & Tools

Sizing: Supplier datasheets, strength of materials calculations.
Software: CATIA V6, Excel, Word.

Lessons Learned

Deeper project management, mechanical sizing, and teamwork across disciplines.

Prosthesis Project for Post-Cubital Amputees

Context & Goal

At the request of an occupational therapist, we designed a forearm prosthesis intended for cycling—adjustable and adaptable to different patients, to facilitate rehabilitation.

Functional plan

Initial functional plans to capture constraints.

3D model

3D modeling in CATIA.

Final prosthesis

Final manufactured prosthesis.

Objectives

My Role

Methodology

  1. Client exchanges, survey of existing solutions
  2. Decision matrix, calculations, CAD, drawings
  3. Fabrication: 3D printing, machining

Technologies & Tools

Software: CATIA V6, Excel, Word.
Machines: Lathe, milling machine, 3D printer.
Sizing: Strength of materials, simulations.

Lessons Learned

Project management, advanced CAD, assisted fabrication, collaborative work.

Ecological and Societal Transition Challenge

Context & Stakes

Team project: making heavy trucks more ecological via electric supply using highway catenaries (pantograph system).

Prototype - top view

Prototype – top view

Prototype - bottom view

Prototype – bottom view

Objectives

My Role

Methodology

  1. Brainstorming on transport solutions
  2. Technical & environmental evaluation
  3. Low-cost physical mock-up

Technologies & Tools

Machines: Laser cutter, multimeter, salvaged components.
Software: Canva, PowerPoint, spreadsheets.

Lessons Learned

First eco-design approach; importance of communication and cross-disciplinary management.

Electric Knife Project

Context & Stakes

Complete mechanical study and modeling of a domestic electric knife. Kinematic analysis, transformation of motor rotation into blade reciprocation, and 3D visualization.

Real electric knife

Starting point: disassembly and observation of parts.

3D modeling

Reconstructed mechanism modeled in Creo Parametric.

Modeled mechanism

Modeled internal mechanical system.

Objectives

My Role

Methodology

  1. Disassembly, component identification
  2. Link analysis, precise measurements
  3. 3D modeling, animation, validation

Technologies & Tools

Software: Creo Parametric.
Tools: Caliper, ruler.
Hardware: Real device analyzed.

Lessons Learned

Mastery of 3D modeling, kinematic analysis, animation, and teamwork.

English Project / F1 Board Game

Context & Stakes

Team language project: creation of a Formula 1 board game inspired by Trivial Pursuit (design, rules, physical build, playable in class).

Easy card

Easy

Medium card

Medium

Hard card

Hard

Objectives

My Role

Methodology

  1. Choose the medium
  2. Rules, questions, printing, 3D pawns

Technologies & Tools

Machines: 3D printer, regular printer, laminator.
Software: 3D printing software, Canva.

Lessons Learned

Teamwork, communication, rigor, creativity, pedagogy.

Checkerboard Robot Project

Context & Stakes

Team of 4: autonomous robot moving on a chessboard, grabbing and returning an object while avoiding obstacles. Programming, design, modeling, tests.

Checkerboard

Board with mission zones and obstacles.

Rear 3/4 robot view

Rear 3/4 view of the model.

Bottom robot view

Bottom view with sensor placement.

Objectives

My Role

Methodology

  1. Technical choices, CAD, assembly, tests
  2. Embedded programming, debugging

Technologies & Tools

Software: Visual Studio Code, component diagram tools.
Hardware: Arduino, sensors, motors, breadboard, etc.

Lessons Learned

Embedded programming, sensor integration, teamwork, rigorous testing.

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