Abstract
This chapter examines periodic output feedback (POF) control scheme for spatial control of Advanced Heavy Water Reactor (AHWR) based on three-time-scale decomposition. The numerically ill-conditioned system of AHWR is first decoupled into three subsystems of lower order, namely, slow, fast 1, and fast 2 by three-stage linear transformation and then a composite controller is designed which provides an output injection gain. Output injection matrix is then used to calculate POF gain, which is applied to the vectorized nonlinear system of AHWR to attain control of spatial power. Effectiveness of the presented control scheme is evaluated via simulations generated under various transient situations. Performance of this scheme is also compared with the fast output sampling control scheme.
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