搜索结果: 1-15 共查到“工学 oscillator”相关记录39条 . 查询时间(0.093 秒)
Frequency entrainment for micromechanical oscillator
Frequency entrainment micromechanical oscillator
2015/8/27
We demonstrate synchronization of laser-induced self-sustained vibrations of radio-frequency micromechanical resonators by applying a small pilot signal either as an inertial drive at the natural freq...
Perturbation analysis of entrainment in a micromechanical limit cycle oscillator
Resonance MEMS Bifurcation Perturbation
2015/8/27
We study the dynamics of a thermo-mechanical model for a forced disc shaped, micromechanical limit cycle oscillator.The forcing can be accomplished either parametrically, by modulating the laser beam ...
Two models for the parametric forcing of a nonlinear oscillator
Parametric excitation Resonance Chaos Elliptic averaging
2015/8/27
Instabilities associated with 2:1 and 4:1 res-onances of two models for the parametric forcing of a strictly nonlinear oscillator are analyzed. The first model involves a nonlinear Mathieu equation an...
Three oscillator model of the heartbeat generator
Phase-only oscillators Phase-locking Devil’s staircase Sinoatrial node
2015/8/27
The sinoatrial (SA) node is a group of self-oscillatory cells in the heart which beat rhythmi-cally and initiate electric potentials, producing a wave of contraction that travels through the heart res...
Shape Optimization of a Blunt Body Vibro-wind Galloping Oscillator
Vibro-wind Galloping instability Energy harvesting
2015/8/26
The nonlinear dynamics of a transverse galloping blunt body oscillator is analyzed with respect to its geometric shape and size. The oscillator's equation of motion is studied using an approximation f...
Inhomogeneity of the phase space of the damped harmonic oscillator under Levy noise
Inhomogeneity of the phase space damped harmonic oscillator Levy noise Statistical Mechanics
2012/4/19
The damped harmonic oscillator under symmetric L\'{e}vy white noise shows inhomogeneous phase space, which is in contrast to the homogeneous one of the same oscillator under the Gaussian white noise, ...
Widely-Tunable Continuous-Wave Single-Longitudinal- Mode Fiber Optical Parametric Oscillator
Nonlinear Optics fibers Nonlinear optics four-wave mixing
2015/5/26
A continuous-wave fiber optical parametric oscillator with a tunability of 114 nm, a wavelength span of 143 nm and single-longitudinal-mode oscillation is demonstrated. The short-term linewidth of the...
Atacama Large Millimeter Array Local Oscillator: How Photonics is Enabling Millimeter-wave Astronomy
Telescopes Phased Array Imaging Systems
2015/5/21
In this talk we will describe the unique photonic technology that provides the reference for the local oscillator system of the ALMA millimeter wave radio telescope as well as describing the “down-str...
Wavelength Conversion by Cascaded FWM in a Fiber Optical Parametric Oscillator
FWM Fiber Optical Parametric Oscillator Wavelength Conversion
2015/5/15
We report on a continuous-wave fiber optical parametric oscillator utilizing selective filtering on cascade four wave mixing (CFWM). Oscillations of distinct CFWM
terms are obtained, extending wavele...
基于经验模态分解和Duffing振子的轴承故障诊断（Fault Diagnosis of Bearing Based on EMD and Duffing Oscillator）
轴承 故障诊断 混沌振子 经验模态分解
2010/12/29
针对齿轮箱轴承振动信号故障信息容易被噪声淹没，且具有非线性、非平稳特性的问题，提出了基于经验模态分解（EMD）和Duffing振子的轴承故障诊断方法。首先对原始振动信号进行经验模态分解，找到包含轴承故障信息的固有模态函数（IMF），然后利用Duffing振子的分岔图找到混沌振子相轨迹发生变化的内部激励力分界值，并将Duffing 振子的内部激励力频率设定为轴承故障特征频率，最后从混沌振子输出相轨迹...
Coupled method of homotopy perturbation method and variational approach for solution to nonlinear cubic-quintic Duffing oscillator
Nonlinear Oscillators Variational formulation
2010/11/25
This paper presents a new approach for solving approximate analytical higher order solutions for strong nonlinear Duffing oscillators with cubic-quintic nonlinear restoring force. The system is conser...
Use of discrete modulation and a continuous wave local oscillator in a 24 km continuous variable quantum key distribution system
Quantum cryptography Quantum communications
2015/6/10
We implement an experimental continuous variable quantum key distribution system over 24 km of optical fiber that uses discrete signaling and a continuous wave local oscillator. A secure key rate of 3...
Picosecond Fiber Optical Parametric Oscillator with 500 nm Tuning Range Using Dispersion-Shifted Fiber
Nonlinear Optics fibers Nonlinear optics four-wave mixing
2015/6/9
We demonstrate a picosecond fiber optical parametric oscillator with a tuning range of 500 nm pumped by a relatively low-cost intensity-modulated pump. Pulses with pulsewidth from 7 ps to 17 ps are ge...
We report the first demonstration of a slow light laser oscillator. The slow light laser was realized by incorporating an ultra-narrow bandwidth long-delay and low loss transmission filter into an Er/...
Integrated optical hyper-parametric oscillator
Integrated optical hyper-parametric oscillator
2015/6/8
We demonstrate an integrated, CMOS compatible, multiple wavelength source based on hyper-parametric oscillation via MI (FWM) gain in a high index doped silica glass ring resonator. We obtain lasing wi...