  To stabilize the periodic operation of a chemical reactor the oscillation
period should be determined precisely in real time. The method discussed in the
paper is based on adaptive sampling of the state variable with the use of
chaotic mapping to itself. It enables precise determination of the oscillation
period in real time and could be used for a proper control system, that can
successfully control the process and maintain the oscillation period at a set
level. The method was applied to a tank reactor and tubular reactor with
recycle.
