Introduction to Motor Control Phaselock Loops. Optical Tachometers. Information Recovery from the Optical Tachometer. Velocity Servos Using the Optical Tachometer. The Frequency Lock Loop. Computer Aided Design. Measurement and Practice. Appendix A: Review of the Stability Problem in Control Systems. Appendix B: Comparison of Position, Velocity, and Phaselock Servos. Appendix C: Permanent Magnet DC Motor Transfer Functions. Appendix D: Inertia Independent Design. Appendix E: The Quadratic Term and the Second Order System. Index.