A parametric insensitive H2 control design approach

H(2) and H(infinity) control design methodologies are known to be efficient to deal with multivariable control problems. However, most of them do not take explicitly the parametric uncertainties into account. This paper proposes a low parametric sensitivity H(2) control design method as an alternative to mu-synthesis or robust H(2) control design. In addition to the standard H(2) criterion, the H(2) norm of the parametric sensitivity function is introduced in order to improve the robustness of the resulting controller. Unfortunately, this problem is a difficult one. Its equivalence to structured feedback H(2) control problem will be shown. The underlying BMI will be solved by making use of an iterative LMI procedure. Two examples will illustrate the interest of the approach. Copyright (C) 2004 John Wiley Sons, Ltd.