The purpose of the current study was to investigate whether adaptations of stride length, stride frequency, and walking speed, independently influence local dynamic stability and the size of the medio-lateral and backward margins of stability during walking. Nine healthy subjects walked 25 trials on a treadmill at different combinations of stride frequency, stride length, and consequently at di...

In this paper, the effect of a static synchronous compensator (STATCOM) influence on the frequency of islanded microgrids based on frequency control using fuzzy cooperative control is investigated. To achieve fast frequency control, instantaneous power balance between generation and consumption is inevitable, and it can be supplied through energy storage systems such as battery with a proper fr...

This paper describes a set of delay-dependent IQC stability conditions for time-delay uncertainty. The IQC’s are linearly parameterized in terms of a pair of rational stability multipliers, each active over one of a pair of complementary frequency intervals. Using the finite-frequency positive real lemma, each of these finite-frequency IQC conditions are shown to be equivalent to a frequency-in...

2014 An HCN laser for infrared frequency synthesis has been designed to satisfy both conditions of high frequency stability and ouptut power. The influence of all the descriptive parameters of the laser on its frequency stability and power are analyzed. The optimization of the two above criteria is discussed with emphasis on frequency stability. On the 891 GHz line the laser shows a natural fre...

A single-frequency 1645 nm pulsed laser with frequency stability close to 100 kHz was demonstrated. The oscillator is injection-seeded by a narrow linewidth Er:Y3Al5O12 (Er:YAG) nonplanar ring and stabilized the modified Pound–Drever–Hall method. pulse repetition rate can be set from 500 Hz 82.72 134.44 energy 9.84 mJ 19.55 mJ. To our knowledge, this best of injection-seeding.

Very-narrow-band Global Positioning System (GPS) receivers have recently been proposed in order to help mitigate the eflects of scintillation. This paper will revisit the stability requirements placed on the local oscillator of such receivers. INTRODUCTION The need to have good local oscillator shortand medium-term stability for phase tracking receivers has been well documented, especially for ...