Control of the filling ratio in the screw conveyer

スクリューコンベアの充満率制御

Control of the filling ratio in the screw conveyer

Creators Wada Kenzo

Creators Hatano Yoshihumi

In the granular transport system composed of a screw conveyer and a hopper, in order to supply the granules quantitatively and transport it efficiently, a outflow rate from the screw conveyer and a filling ratio inside a trough must be controlled at the same time. As the first step, the cotrol of the filling ratio is discussed in this paper. As a control algorithm, generalized predictive cotrol (GPC) method which is useful to a non-minimum phase process with variable dead-time is applied to the screw conveyer process. Moreover GPC algorithm which includes a filter 1/T (z^<-1>) is applied to the process. Their control performances are examined. Finally, the following results are obtained through simulations and experiments. 1) Good response waves for a set-point change and a disturbance input are obtained and granular materials can be transported under the optimal filling ratio by applying the GPC algorithm to the screw conveyer process. 2) By introducing the filter 1/T (z^<-1>) into the GPC algorithm, fluctuation of manipulating variable and controlled variable are suppressed.

[ISSN]0372-7661

[NCID]AN00244228