Signal-parametric invariance of control systems

A new definition of signal-parametric invariance of a nonlinear system is offered. The conditions of invariance of system's response parameters to the source signal's amplitude are determined. The connection between classical and parametric invariance is established. The equations for invariance defect evaluation are derived, and the ways to decrease it are considered. A possibility of control system optimization with respect to the signal-parametric invariance criterion is discussed.