Let us consider the third-order Lur’e Postnikov type system with the state vector xI1 and the system with uncertainties of state vector xI2, such that
First, we must carry out a change of basis defined by the matrix PI so that is the last component of the state vector x; for the vector characterizing the output, we obtain:
There are an infinite number of basis changes that give this result.
For PI defined by
or for the process ...