Weigh feeding system with stochastic control

Details Weigh feeding system with stochastic control Weigh feeding system with stochastic control

1986-06-27

1988-10-04

Lall, Parshotam S.

Boots, shoes, and leggings

177 59, 177 66, 222 56, G01G 1300, B67D 514

Patent

active

047759496

ABSTRACT:
A weigh feeding system using a stochastic controller wherein the weight of material is sensed, and an estimate of the mass flow state of the material being discharged is created by use of a Kalman filter process. Plant noise processes and measurement noise processes, which affect the measured weight signal, are modeled as stochastic processes and are used, in combination with the sensed weight signal, to calculate the estimated mass flow state. The noise model is modified to account for severe disturbances. The estimated mass flow state signal is used to calculate a motor feedback signal which, in turn, is used to control the speed of the discharge apparatus. In this manner, the mass flow of the material actually being discharged is driven to a desired mass flow with minimum error variance in the presence of unavoidable plant and measurement noise.

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