английский => русский Техника Математика и статистика Управление с использованием прогнозирующей модели.

This is illustrated in Fig. 3, which illustrates the shape of the process transfer function matrix for three general cases. The square plant case, which occurs when the plant has just as many MVs as CVs, leads to a control problem with a unique solution. In the real world, square is rare. More common is the fat plant case, in which there are more MVs available than there are CVs to control. The extra degrees of freedom available in this case can be put to use for additional objectives, such as moving the plant closer to an optimal operating point. When valves become saturated or lower level control action is lost, the plant may reach a condition in which there are more CVs than MVs; this is the thin plant case. In this situation it will not be possible to meet all of the control objectives; the control specifications must be relaxed somehow, for example by minimizing CV violations in a least-squared sense.