Monitored robust force control of a milling process

This paper focuses on the important problems of toot wear or flexion that i nduce defects in the part. The contributions of the main control strategies are discussed. A monitored robust force control strategy is specified by a hybrid automaton. The force controller is designed from an identified plan t model by a robust pole placement method based on iterative shaping of the input-output sensitivity functions. Two estimates of the cutting mean forc e based on the l(1) and l(infinity) norms are proposed to take the great va riations of the measured forces issued from the multiple teeth engaged in t he part into account. The monitored robust force control strategy was imple mented in a platform of experiments to evaluate two scenarios of experiment s showing a good way to get more efficient performances for the monitored c ontrol strategy. (C) 2001 Elsevier Science Ltd. All rights reserved.