1 / 12

Modelling, Simulation and Optimization of a Shipbuilding Workshop

Modelling, Simulation and Optimization of a Shipbuilding Workshop. Frédéric Bair , ANAST (University of Liege), Belgium, F.Bair@ulg.ac.be Yves Langer , n-Side, Belgium, Yves.Langer@ulg.ac.be Philippe Rigo , ANAST (University of Liege), Belgium, Ph.Rigo@ulg.ac.be. Summary :

fbooker
Download Presentation

Modelling, Simulation and Optimization of a Shipbuilding Workshop

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Modelling, Simulation and Optimization of a Shipbuilding Workshop Frédéric Bair, ANAST (University of Liege), Belgium, F.Bair@ulg.ac.be Yves Langer, n-Side, Belgium, Yves.Langer@ulg.ac.be Philippe Rigo, ANAST (University of Liege), Belgium, Ph.Rigo@ulg.ac.be Optimization and Engineering – Louvain-La-Neuve – Wednesday May 24th 2006

  2. Summary : • Welding Shipbuilding Workshop (ALSTOM, « Chantiers de l’Atlantique ») • Software used: eM-Plant (Tecnomatix) • Treatment of the huge database (Access) • Very detailed model • Stochastic • Optimization: Genetic Algorithm Optimization and Engineering – Louvain-La-Neuve – Wednesday May 24th 2006

  3. Welding Workshop Optimization and Engineering – Louvain-La-Neuve – Wednesday May 24th 2006

  4. Side A - Assembly 1 - Assembly 2 - Assembly 3 - Assembly 4 - Assembly 5 - … - Assembly n-1 - Assembly n - … - … - … - … - … - Assembly m Side B - Assembly m+1 - Assembly m+2 - Assembly m+3 - Assembly m+4 - Assembly m+5 - … - … - … - … - … - … - … - … Kit j Kit 1 Group k+1 Group 1 Kit 2 Kit j+1 Kit i Group k+2 Group 2 Group l Group k Optimization and Engineering – Louvain-La-Neuve – Wednesday May 24th 2006

  5. Objective: minimize production time • with following characteristics : • Assemblies belong to fixed Kit • Kits belong to fixed Group • Orders of groups fixed • Can optimize only position of kits among Groups • Sequence optimization • Useful for Genetic Algorithm (GA) Optimization and Engineering – Louvain-La-Neuve – Wednesday May 24th 2006

  6. 2 different sequences (functioning): • half-workshop sequence  avoid stack up Half-Cell 1 Half-Cell 2 Half-Cell 3 Optimization and Engineering – Louvain-La-Neuve – Wednesday May 24th 2006

  7. Half-cell sequence  better to equilibrate both sides (saturation of welding robot) Half-Cell 1 Half-Cell 2 Half-Cell 3 Optimization and Engineering – Louvain-La-Neuve – Wednesday May 24th 2006

  8. Operation Time for each Kit : Preparation – Tacking – Welding – Finishing Optimization and Engineering – Louvain-La-Neuve – Wednesday May 24th 2006

  9. Other possible results of one simulation: • Occupation Times of welding robots, mechanized gripper, crane bridges, workers • Gantt diagram (for each half-cell) • Total times of each operation (by assembly, by kit, by group) • Storage Times • … Optimization and Engineering – Louvain-La-Neuve – Wednesday May 24th 2006

  10. Optimization: • Genetic Algorithm : 1 individual by a given sequence • Low variance • Not necessary to multiply simulations • Half-cell sequence better than half-workshop sequence Optimization and Engineering – Louvain-La-Neuve – Wednesday May 24th 2006

  11. Evolution of the population : Gain > 8% between a random sequence and best solution Optimization and Engineering – Louvain-La-Neuve – Wednesday May 24th 2006

  12. Conclusion and perspectives: • Simulation useful even without optimization • Optimization development Time < Modelling development Time • Not optimal solution but interesting gains • Automatic Kits creation Optimization and Engineering – Louvain-La-Neuve – Wednesday May 24th 2006

More Related