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A supervisory discrete event control scheme is proposed to configure any node of a parametric set of production machines and buffers in a manufacturing process of any desired directed graph configuration. Based on this scheme any desired configuration can be realized and maximum flexibility of the manufacturing process can be achieved. The controllability of the proposed supervisor with respect to...
The problem of managing and orchestrating communication protocols is studied using the discrete event system approach. The indicative cases of the BGP, the CAN protocol and the IEEE 802.11 protocol are modelled as finite state machines Two supervisors are designed to be simultaneously applied. The first controls the consecutive connection tries of each protocol. The second orchestrates the hierarchical...
Underground mining process elevator systems are modelled using the discrete event system approach. A parametric model of the system for n gallery levels is developed in the form of a finite deterministic automaton. The desired performance of the system is expressed in the form of a set of desired languages where their properties have been investigated. A bank of supervisors satisfying the desired...
The problem of fault detection is investigated for the case of Sequential Interindustry Models (SIMs). The model is in discrete time descriptor form including non measurable total outputs and uncertain final demand orders. For this model category the problem of fault detection is studied on the basis of the design of two observers.
A step-wise switching observer design scheme for nonlinear processes is proposed. To illustrate the steps of the approach, the scheme is applied to the nonlinear process of a double effect evaporator with short-tube vertical calandria-type units. The scheme consists of a bank of observers and a supervisor. The supervisor and the observer bank are designed on the basis of experimental data resulting...
In this paper the problem of fault detection is investigated for the case of a time varying input-output Leontief model with non measurable total outputs and uncertain net product vector. The capital coefficient matrix is considered to be block diagonal and singular. For this model category the problem of fault detection is solved on the basis of the design an appropriate unknown input observer.
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