Title:
【発明の名称】自己同調型確率論的制御及び重量及びアクチュエータ測定値を用いる秤量供給システム
Document Type and Number:
Japanese Patent JP3040783
Kind Code:
B2
Abstract:
A weigh feeding system using a stochastic controller wherein the weight of material and the position of a material discharge actuator are 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 and actuator position signal, are modeled as stochastic processes and are used, in combination with the sensed weight and actuator position signals, to calculate the estimated mass flow state. The noise models are modified to account for 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. Self-tuning of the stochastic controller is employed to accurately determine parameters of the plant noise and measurement noise processes, and to compensate the controller for control dynamics. Feedback control tuning is also employed to monitor the set-point error in order to achieve quick response while maintaining smooth steady-state set point control.
Inventors:
Paul Earl Calata
Application Number:
JP19916189A
Publication Date:
May 15, 2000
Filing Date:
July 31, 1989
Export Citation:
Assignee:
K-Tron International, Incorporated
International Classes:
G01G11/00; G01G11/08; G01G13/20; G01G13/29; G05D7/00; (IPC1-7): G05D7/00
Domestic Patent References:
| JP5514368B2 |
Attorney, Agent or Firm:
Atsushi Nakajima (1 person outside)