Title: Fractional Derivatives of Convex Lyapunov Functions and Control Problems in Fractional Order Systems,
Abstract: The paper is devoted to the development of control procedures with a guide
for conflict-controlled dynamical systems described by ordinary fractional
differential equations with the Caputo derivative of an order $\alpha \in (0,
1).$ For the case when the guide is in a certain sense a copy of the system, a
mutual aiming procedure between the initial system and the guide is elaborated.
The proof of proximity between motions of the systems is based on the estimate
of the fractional derivative of the superposition of a convex Lyapunov function
and a function represented by the fractional integral of an essentially bounded
measurable function. This estimate can be considered as a generalization of the
known estimates of such type. An example is considered which illustrates the
workability of the proposed control procedures.