Observer Theory Applied to the Optimal Control of Xenon Concentration in a Nuclear Reactor옵저버 이론의 원자로 지논 농도 최적제어에의 응용

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The optimal control of xenon concentration in a nuclear reactor is posed as a linear quadratic regulator problem with state feedback control. Since it is not possible to measure the state variables such as xenon and iodine concentrations directly, implementation of the optimal state feedback control law requires estimation of the unmeasurable state variables. The estimation method used is based on the Luenberger observer. The set of the reactor kinetics equations is a stiff system. This singularly perturbed system arises from the interaction of slow dynamic modes (iodine and xenon concentrations) and fast dynamic modes (neutron flux, fuel and coolant temperatures). The singular perturbation technique is used to overcome this stiffness problem. The observer-based controller of the original system is effected by separate design of the observer and controller of the reduced subsystem and the fast subsystem. In particular, since in the reactor kinetics control problem analyzed in the study the fast mode dies out quickly, we need only design the observer for the reduced slow subsystem. The results of the test problems demonstrated that the state feedback control of the xenon oscillation can be accomplished efficiently and without sacrificing accuracy by using the observer combined with the singular perturbation method.
Publisher
Korean Nuclear Soc
Issue Date
1989-06
Language
English
Citation

NUCLEAR ENGINEERING AND TECHNOLOGY, v.21, no.2, pp.99 - 110

ISSN
1738-5733
URI
http://hdl.handle.net/10203/7157
Appears in Collection
NE-Journal Papers(저널논문)
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