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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.
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Electrically coded piezoelectric lock mechanisms are strong, have few moving parts, are resettable, and are relatively unaffected by high magnetic fields. Codes are extremely difficult to circumvent.
Phase-locked-loop phase modulator has the capability of generating a 6.8MHz carrier at modulation indexes as high as 2.5, with a distortion of the demodulated signal of less than 5 percent. These characteristics are obtained without the use of multipliers.
Ball-lock-bolt separation system for aerospace applications
Non-linear transient behavior of second, third, and fourth order phase-locked loops
FDM demodulation characteristics of nonlinear phase locked loops
Computer technique for predicting threshold in phased locked loops with and without frequency modulation
Metallurgical and hydrogen embrittlement tests on Saturn S-1C engine actuator midstroke locking mechanism bolt MS 24678-60
Mode locking and ultrashort pulses in giant pulses in giant pulse ruby laser with heated nitrobenzene or alpha-chloronaphthalene in resonator
Frequency locked loop /FLL/ to optimize loop filter and quantization of amplitude channel
Digital simulation of phase locked receiver in diffuse multipath fading environment with band limited thermal noise
Optical parametric oscillator output /signal/ frequency locked to absorbing atomic transition, discussing effective linewidth
Simultaneous mode locking of Nd YAG laser and intracavity second harmonic generation in high temperature Li niobate or BaNa niobate
Frequency locking of HCN laser transition at 890 GHz to harmonic of crystal controlled oscillator
Longitudinal modes locking and ultrashort light pulse generation in laser cavity resonator with nonlinear refractive index
Locking pin can be withdrawn only when stress on the joint is negligible. Pin consists of a forward-pointing sleeve, a spring-loaded sliding handle, and a sliding plunger. Plunger movement controls installation and withdrawal of pin.
Mechanism absolutely immobilizes microscope stage at a preset focus, preserving focus indefinitely. The lock is a second-class lever consisting of a straight body having a fulcrum with a cylindrical bearing surface at one end and a thumbscrew at the other end.
Markov process for time to cycle slip in first and second order phase lock loops
Statistical behavior steady state phase error and time to cycle slip for phase lock loops