Servo Motors and Industrial Control Theory [electronic resource] / by Riazollah Firoozian ; edited by Frederick F. Ling, Ward O. Winer, Arthur E. Bergles, Georgia A. Klutke, Kuo K. Wang, Iain Finnie, J.R. Welty, Michael D. Bryant, Henry T. Yang, C. Mow, Frederick A. Leckie, Dietmar Gross