Fundamental Investigation on Automatic Controlled Arc Welding (Report 5)

On the Cosideration of the Noise for the Servo Control System in Directly Arc Observing Method

Abstract

The discussion is made on the noise for the servo control system which is generated when the "Directly Arc Observing Method" is applied to the weld joint tracking.
The structure of the sensor for the weld joint tracking is shown and its performance is explained in the first part.
The result of the experimental measurement of the noise, due to the arc plasma light fluctuation, from the sensor is shown in the next.
Then, the stochastic theory for random process is developed to compare with the experimental result.
The consideration on the noise generation is made on the basis of the theoretical calculation in the last part.