  We describe adaptive control algorithms whereby a chaotic dynamical system
can be steered to a target state with desired characteristics. A specific
implementation considered has the objective of directing the system to a state
which is more chaotic or mixed than the uncontrolled one. This methodology is
easy to implement in discrete or continuous dynamical systems. It is robust and
efficient, and has the additional advantage that knowledge of the detailed
behaviour of the system is not required.
