专利名称：Weigh feeding system with self-tuning
weigh weight 区别
stochastic control and weight and actuator
measurements
发明人：Paul R. Kalata
申请号：US07/230415
申请日：19880810
公开号：US04954975A
公开日：
19900904
专利内容由知识产权出版社提供
摘要：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.
申请人：K-TRON INTERNATIONAL, INC.
代理机构：Oliff & Berridge
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