New results in the computation of output-nulling subspaces\ud for descriptor systems

This paper deals with the computation of basis matrices of output-nulling and reachability subspaces for linear\ud time-invariant (LTI) descriptor systems, which have been found to appear in the solution of many control and estimation problems. In particular, one of the classic approaches for the computation of these subspaces, which exploits the calculation of the null-space of the Rosenbrock system matrix pencil and which has found important applications in non-interacting and fault-detection problems, is generalized for descriptor systems