Residual Kinetic Energy (RKE) method [13] assumes that you start with a small ASET and wish to find the sensor locations that you should add to this. It suffers from some of the same limitations as the GPKE method but can be particularly helpful in building a good ASET from a small set of starting locations.
The RKE is calculated for each DOF in the ‘O-set’ using the FEM mode shapes as follows:
(2.5.2-1)
where
= O-set partition of the mass matrix
= O-set partition of the FEM mode
shapes
= A-set partition of the FEM mode
shapes