  Coupling of chaotic oscillators has evidenced conditions where
synchronization is possible, therefore a nonlinear system can be driven to a
particular state through input from a similar oscillator. Here we expand this
concept of control of the state of a nonlinear system by showing that it is
possible to induce it to follow a \textit{linear} superposition of signals from
multiple equivalent systems, using only partial information from them, through
one- or more variable-signal. Moreover, we show that the larger the number of
trajectories added to the input signal, the better the convergence of the
system trajectory to the sum input.
