Stability regime of pulse frequency for single event electrospraying

Stability regime of pulse frequency for single event electrospraying

This study demonstrates that the hydrodynamic phenomena taking place inside the capillary limits the frequency range of voltage pulses for stable single event electrospraying SEE , when the meniscus/cone size is defined by the inner diameter of the nozzle. For the analysis of SEE, we used a one-dimensional model describing the displacement and oscillations of the liquid inside the nozzle. The f...

Preliminary Design of Spacecraft Attitude Control with Pulse-Width Pulse-Frequency Modulator for Rest-to-Rest Maneuvers

In this paper, the preferred region of design parameters for quasi-normalized equations of single-axis attitude control of rigid spacecraft using pulse-width pulse-frequency modulator (PWPFM) is presented for rest-to-rest maneuvers. Using the quasi-normalized equations for attitude control reduces the system parameters, that is, the moment of inertia, the filter gain, and the maximum torque of ...

Synthesis of rainfall intensity-frequency regime of iran

Optimizing WAAS Accuracy/Stability For a Single Frequency Receiver

The Wide Area Augmentation System (WAAS) provides accuracy (95%) to better than 1m in horizontal and 2m in vertical, which is quite an improvement compared to the stand-alone GPS accuracy and well within the WAAS specification. However, WAAS was designed and optimized for integrity rather than accuracy. Integrity requirements caused the selected carrier-smoothing time to be short and the weight...

Single-cycle radio-frequency pulse generation by an optoelectronic oscillator.

We demonstrate experimentally passive mode-locking of an optoelectronic oscillator which generates a single-cycle radio-frequency pulse train. The measured pulse to pulse jitter was less than 5 ppm of the round-trip duration. The pulse waveform was repeated each round-trip. This result indicates that the relative phase between the pulse envelope and the carrier wave is autonomously locked. The ...