Stabilization with target oriented control for higher order difference equations

Abstract

For a physical or biological model whose dynamics is described by a higher order difference equation $u_{n+1}=f(u_n,u_{n-1},\dots ,u_{n-k+1})$, we propose a version of a target oriented control $u_{n+1}=cT+(1-c)f(u_n,u_{n-1},\dots ,u_{n-k+1})$, with $T\ge 0$, $c\in [0,1)$. In ecological systems, the method incorporates harvesting and recruitment and for a wide class of $f$, allows to stabilize (locally or globally) a fixed point of $f$. If a point which is not a fixed point of $f$ has to be stabilized, the target oriented control is an appropriate method for achieving this goal. As a particular case, we consider pest control applied to pest populations with delayed density-dependence. This corresponds to a proportional feedback method, which includes harvesting only, for higher order equations.

18 pages, 3 figures, published in 2015 in Physics Letters A