L 1 = Q Approach for efficient computation of disturbance rejection measures for feedback control q

This paper presents practical methods for computation of disturbance rejection measures, which are useful for assessing the dynamic operability of the process. Using L1 optimal control theory, we consider the cases of steady-state, frequency-wise and dynamic systems. In comparison to the available methods, the proposed approach ensures that a linear, causal, feedback-based controller exists that achieves the computed bounds and the method also scales well with problem dimensions. 2007 Elsevier Ltd. All rights reserved.