Browsing by Subject "Design parameters"

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Open Access
Interaction of design and operational parameters in periodic review kanban systems
(Taylor & Francis, 2003) Erhun, F.; Aktürk, M. S.; Türkcan, A.
In this study, we propose an analytical model to determine the withdrawal cycle length, kanban sizes and number of kanbans simultaneously in a multi-item, multi-stage, multi-period, capacitated periodic review kanban system. Traditionally, research in kanban systems has been separated into 'design level' research, and 'shop floor level' research. In both veins of research, especially for the design level, various algorithms have been developed. However, it is important to state that there is a significant relationship between the design parameters and the operational issues, such as kanban schedules and actual lead times. Therefore, we analytically consider the interdependencies between the design and operational decisions, and evaluate their impact on each other.
Open Access
Strong stabilization of MIMO systems with restricted zeros in the unstable region
(IEEE, 2008-12) Gündeş, A. Nazlı; Özbay, Hitay
The strong stabilization problem (i.e., stabilization by a stable feedback controller) is considered for a class of finite dimensional linear, time-invariant, multi-input multioutput plants. It is assumed that the plant satisfies the parity interlacing property, which is a necessary condition for the existence of strongly stabilizing controllers. Furthermore, the plant class under consideration has no restrictions on the poles, on the zeros in the open left-half complex plane, on the zeros at the origin or at infinity; but only one finite positive real zero is allowed. A systematic strongly stabilizing controller design procedure is proposed that applies to any plant in the class, whereas alternative approaches may work for larger class of plants but only under certain sufficient conditions. The freedom available in the design parameters may be used for additional performance objectives although the only goal here is strong stabilization. In the special case of single-input single-output plants in the class considered, the proposed stable controllers have order one less than the order of the plant. © 2008 IEEE.