INDEX-2 Military standard synchro code, 1-6 Modulators in the servo system, 2-23 crystal diode modulators, 2-23 Multi-loop servo systems, 2-30 Multispeed synchro systems, 1-42 dual-speed, 1-43 single-speed, 1-42 tri-speed, 1-45 N Navy prestandard synchro code, 1-6 O Open-loop control system, 2-2 Oscillating input signal, 2-15 P Position sensors, 2-17 potentiometers, 2-17 Position servo loop, 2-5 Precession, gyroscopes, 3-2 Properties of gyroscopes, basic, 3-2 precession, 3-3 rigidity, 3-5 Pulse-counting accelerometer, 3-22 R Rate generator (tachometer), 2-21 ac, 2-21 de, 2-23 Rate gyros, 3-15 Receiver rotation, torque synchro system, 1-24 Related devices, 4-1 IC synchros, 4-1 resolvers, 4-7 step-transmission systems, 4-4 Resolvers, 4-7 Rigidity, gyroscopes, 3-5 Rotor construction, synchros, 1-10 S Schematic symbols, 1-7 Servoamplifiers, 2-26 Servos, 2-1 categories of control systems, 2-1 characteristics, 2-11 components and circuits, 2-17 operation, 2-3 Stator, construction, synchros, 1-11 Step-transmission systems, 4-4 Summing networks, 2-19 Synchro torque receiver, 1-21 Synchro torque transmitter, 1-19 Synchronizing circuits, 2-27 semiconductor-diode synchronizing network, 2-27 Synchros, 1-1, 1-2 characteristics, 1-12 classification, 1-4 construction, 1-9 control synchro systems, 1-33 fundamentals, 1-2 multispeed synchro systems, 1-42 synchro capacitors, 1-39 theory of operation, 1-14 torque synchro system, 1-22 troubleshooting synchro systems, 1-54 zeroing, 1-46 T Time lag, 2-11 error-rate damping, 2-14 friction clutch damping, 2-13 magnetic clutch, 2-13 Torque synchro system, 1-22 basic synchro system operation, 1-22 torque differential synchro systems, 1-25 Torque, synchros, 1-13 Troubleshooting synchro systems, 1-54 symptoms and causes, 1-56 synchro testers, 1-60 trouble indicators, 1-55 voltage testing, 1-60 V Velocity servo loop, 2-9 Voltmeter method, zeroing synchros, 1-46