SEARCH · Engineering Papers
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Voltage transients due to phase angle switching of speed control power for Brayton cycle alternator examined by computerized simulation
Digital memory system with multiple switch cores for driving each word location
Antenna array at focal plane of reflector with coupling network for beam switching
System for checking status of several double-throw switches by readout indications
Phase locked demodulator with bandwidth switching amplifier circuit
High dc switch for causing abrupt, cyclic, decreases of current to operate under zero or varying gravity conditions
Cs vapor thermionic diodes with low temperature dual mode characteristics applicable as switching elements in DC to AC power conditioner
Single mode locked Nd-glass laser pulse time synchronization with Q switched ruby laser
Carbon dioxide laser with simultaneous active rotating mirror Q switch and passive absorbing gas cell
Bilateral switching networks synthesis by topological technique, tracing truth table optimum path by visual pattern detection
Magnetically coupled tunnel diode oscillator with square loop core, calculating leakage and source inductances effect on switching pattern
Pulse rise time effect on nanosecond magnetic thin film switching with flux reversal and stray field interaction
Controllable pulse length Q switched Nd-YAG laser using lithium iodate doubling crystal
Weierstrass condition for optimality in coplanar elliptic orbit transfer involving velocity impulse control variables, discussing switching relations at corner of optimal trajectory
Stark effect saturable absorber modulation of passively Q switched carbon dioxide laser, using difluoroethane, difluoroethylene, methyl fluoroform, trichloroethylene and vinyl chloride
Switched mode adaptive terminal control for propulsive landing of nonlifting gravity turn ballistic vehicle under uncertain atmospheric conditions
Switch concept provides simple means of achieving electromechanical time delay function. Unit consists of reed-type circuit breaker enclosed by copper tubing with electromagnetic coil wound around tubing and entire assembly mounted on insulating platform. Characteristics are affected only by geometry of system so device is expected to be very stable.
Radio frequency switching technique for single receiver and data processing channel to be used for phase movement measurement is discussed. Components of interferometer radio frequency unit, X-band receiver, and interferometer data processing unit are illustrated. Elimination of major measurement error source is described.