Research of criterion of a minimum of the resulting root-mean square error

The various approaches to a choice of weight coefficient of criterion of a minimum of the resulting root-mean-square error of linear automatic control systems are considered. This criterion allows to define compromise meanings of small parameters of system, minimizing an resulting error of the system, which is summed dispersion of measurement noise and error of reproduction of determined or casual reference input. Changing weight coefficient of criterion, we give greater "weight" to that error, which is necessary for suppressing more strongly.