Modelling an infrared welding process
I am working in the R&D department of an automatic machine provider company. We have developped an automatic machine which is welding photovoltaic cells in series, in order to get PV modules. We want to create a model of our machine. I will try to explain myself.
The machine consists in:
1.- an aluminium heating plate where a resistor is introducing energy, and a termocouple is measuring the actual temperature.
2.- an infrared lamp, which is being activarted when a solar cell is entering the soldeirng zone. A pyrometer detects the actual temperature of the cell.
The machine is controlled by a PLC, which is scaning (and this writing a row of data) each milisecond. In this row of data, we can see the temperature of the solar cell (which is the key variable we want to model) and all the other variables (power of lamp, power of resistor, temperature of the aluminium base).
A complete welding cycle is around 1,2 seconds, so we have around 1200 rows, where the temperature of the cell is passing from 25 degrees to around 220 degress, and back to 120 degrees.
Now my question: We would like to put several configurations of the machine (ex. lamp power 10%, 50% and 100%) and register wedling cycles for each configuration. Feed these data to rapidminer, and get a "model" of the machine for intermediatr states.
We have been looking into tutorials and doc, but we can not find some "cyclic" case. I mean, our 1200 rows represent one cycle, and not 1200 independent cases.
We are stucked with this "cyclic" issue, and we can not figure out how could it be implemented in rapidminer. It would be much appreciated if someone could give us some advise.
Thank you in advance for your collaboration,