Abstract: Tigital filtering technology was applied to weight-loss metering feeding system in order to improve the accuracy of on-line flux-measuring in extrusion process. The mechanical structure and controlling mechanism of the weight-loss metering were introduced. Limiting-recursive average filtering algorithms was employed to control the extrusion flux through the weight-loss metering system, which was verified by the on-line flux measuring in composite sheet extrusion.

Key words: weight-loss metering feeding, digital filtering, on-line extrusion flux, accuracy, extrusion