Determination of the signals to be measured for the identification of subsystems and noise signals in hierarchically structured systems

摘要

An approach is given for determining those measurement signals necessary for the a priori identifiability of the unknown subsystems and noise signals in large scale systems. It requires the solution of a nonlinear matrix equation system. To perform the test of a priori identifiability automatically by means of a computer a formula manipulation system was developed. It realizes the determination of those signals which should be measured for a favourable identification strategy. The approach is illustrated for the unknown subsystems and noise signals of a hierarchically structured system consisting of three levels.