Majd, Vahid Johari; Simaan, Marwan A.; Vogt, William G. Approximate time optimal control of DC servos with unknown load and nonlinear friction torque. (English) Zbl 0875.49029 Optim. Control Appl. Methods 16, No. 5, 361-371 (1995). MSC: 49N70 Differential games and control 49N75 Pursuit and evasion games PDFBibTeX XMLCite \textit{V. J. Majd} et al., Optim. Control Appl. Methods 16, No. 5, 361--371 (1995; Zbl 0875.49029)