Research on Identification Algorithm of Cascade Control System

Table 3

A comparison of MSE results of step response using different approaches.

Method	MSE result
PNLSS-I (polynomial non-linear state space)	0.4498
NLSS2	0.3433
BLA (best linear approximation)	0.7574
Volterra models (3rd degree) (transient removal)	0.5400
Volterra models (3rd degree) (no transient est.)	2.0800
HBJ	0.0087
Proposed CMP (closed-loop moment parameter identification)	0.0049