Identification of the Unknown Parameters of an Object

Abstract

There is presented the method for finding the unknown parameters of an object in Matlab environment. The method is based on the use of input and output data of the process, controlled by a programmable logic controller (PLC). The method for determining the parameters is based on an autoregressive model that has an outer input and output error model. The method was used to find the heat exchange transfer function in the reactor vessel model. Verification has been made of the adequacy of the response of the obtained heat exchange model to the reaction of a system, controlled by PLC. By using the responses of the system and the model of the object, it was found that obtained model does a good approximation of a product’s heat exchange process. Based on the obtained results it can be concluded that the results confirm the idea for finding the parameters of an unknown object, when the object is in a closed loop system, which tries to stabilize the system. Ill. 7, bibl. 3 (in English; abstracts in English, Russian and Lithuanian).