Author: V. N. Chetverikov
We study the problem of looking for flat control systems and flat outputs.
A control system is flat if there exists a change of variables
transforming this system to the trivial system: $\dot x = u$.
The change of variables can be of most general type.
In this work, a necessary and sufficient condition for flatness
is obtained. We give also a flatness test and
a method for constructing the change of variables.
An example is considered to illustrate the test and the method.
7 pages, LaTeX-2e.
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