Process Dynamics of Rice Husker (II)

Dynamic Characteristics

Abstract

The static characteristics of unit process of rice husker were stated in the first report. In this paper, the results of some experiments on dynamic relation between various operating conditions of each unit process and grain feed rate by means of the inditial and impulse response methods are reported. The time behaviour of grain flow rate was measured by the grain flowmeter.
From the response curves obtained, the equivalent dead time L and time constant T of each unit process are determined and expressed by the variations of grain flow rates. The dynamic characteristics Gi are expressed as the transfer function e-L_s/T_s+1 or e^-L_s/(1/2 T_s+1)². As T and L vary by the grain flow rate and operating conditions of unit proccess respectively, the process system of this husker is nonlinear.