Abstract
This paper deals with a method to control the penetration depth in overlap laser welding, using feedback control. Some applications demand that an overlap weld is joined sufficiently, while it is not fully penetrated to the back side of the bottom plate. An optical sensor which measures the process radiation coaxially is used as the feedback signal. First the correlation between the penetration depth and this optical signal has been obtained. Hereafter, system identification methods have been used to obtain a dynamic model of the welding process. The model is written as a transfer function with laser power as input and the sensor signal strength as output. With this model a simple feedback controller has been designed and tested in real experiments. The laser power serves as an actuator regulating the penetration depth. It was found that the feedback control system was able to maintain a certain penetration depth, within acceptable boundaries.
| Original language | English |
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| Title of host publication | WESIC 2001 |
| Subtitle of host publication | Proceedings 3rd Workshop on European Scientific and Industrial Collabroration |
| Editors | J. van Amerongen, J.B. Jonker, P.P.L. Regtien |
| Place of Publication | Enschede, Nederland |
| Publisher | Drebbel Institute for Mechatronics |
| Pages | 495-503 |
| Number of pages | 9 |
| ISBN (Print) | 90-36516-10-2 |
| Publication status | Published - 27 Jun 2001 |
| Event | 3rd Workshop on European Scientific and Industrial Collaboration, WESIC 2001 - University of Twente, Enschede, Netherlands Duration: 27 Jun 2001 → 29 Jun 2001 Conference number: 3 |
Workshop
| Workshop | 3rd Workshop on European Scientific and Industrial Collaboration, WESIC 2001 |
|---|---|
| Abbreviated title | WESIC |
| Country/Territory | Netherlands |
| City | Enschede |
| Period | 27/06/01 → 29/06/01 |