根据自适应卡尔曼波器纪律一个鲁比原子钟
Kun Liu1,2, Xiaolong Guan1, Xiaoqian Ren1
1National Time Service Center, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Xi'an 710600, China.
Sensors (Basel, Switzerland)
|July 27, 2024
概括
这项研究引入了一种自适应的卡尔曼过算法,以改善卢比原子钟的稳定性. 新的控制系统显著提高精确计时应用的精度和频率稳定性.
科学领域:
- 原子物理 原子物理
- 控制系统工程 控制系统工程
- 计量学 计量学 计量学
背景情况:
- 原子钟对于全球导航卫星系统 (GNSS) 至关重要,但长期稳定性不佳.
- 准确的计时对于导航,通信和科学研究至关重要.
研究的目的:
- 开发和评估一种新的控制系统,以提高鲁比原子钟的长期稳定性.
- 为了提高鲁比原子钟的精度和频率稳定性,用于苛刻的应用.
主要方法:
- 开发适应式卡尔曼过算法用于时钟纪律.
- 使用自相方差最小平方 (ALS) 准确估计时钟噪声参数.
- 根据UTC标准进行实验验证.
主要成果:
- 适应式卡尔曼过算法证明了对时钟噪声参数的高估计准确性.
- 与UTC相比,实现了时钟误差的标准偏差优于2.568纳秒 (ns).
- 改进了峰值到峰值时钟误差值,使其在11.358 ns. 的范围内.
- 频率稳定性降低至3.06 × 10-13 @100,000秒.
结论:
- 拟议的自适应卡尔曼过算法是鲁比原子钟学科的准确和有效的控制策略.
- 开发的系统显著提高了原子钟的性能,使它们更适合高精度应用.
相关概念视频
Design Example: Underdamped Parallel RLC Circuit
283
Consider designing an oscillator circuit, a crucial component in various electronic devices and systems. The objective is to create an oscillator circuit with specific characteristics: a damped natural frequency of 4 kHz and a damping factor of 4 radians per second. To accomplish this, a parallel RLC circuit is employed, known for its ability to sustain oscillations at a resonant frequency. In this case, the damping factor is pivotal in achieving the desired performance.
Starting with a fixed...
Starting with a fixed...
283
Instrument Calibration
169
Instrument calibration is essential for ensuring that instruments produce accurate and consistent results. It is vital in manufacturing, healthcare, testing laboratories, and scientific research. Calibration processes are specific to each instrument and help enhance data accuracy. Each instrument has a unique calibration process tailored to its design and function to improve data accuracy.
Analytical Balance Calibration
An analytical balance measures mass and requires regular calibration to...
Analytical Balance Calibration
An analytical balance measures mass and requires regular calibration to...
169
Time and frequency -Domain Interpretation of Phase-lead Control
80
Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
80
Time and frequency -Domain Interpretation of PI Control
113
Proportional-Integral (PI) controllers are essential in many control systems to improve stability and performance. They are commonly used in everyday devices like thermostats to enhance system damping and reduce steady-state error. When the zero in the controller's transfer function is optimally placed, the system benefits significantly in terms of stability and accuracy.
Acting as a low-pass filter, the PI controller slows the system's response and extends settling times. This requires...
Acting as a low-pass filter, the PI controller slows the system's response and extends settling times. This requires...
113
RLC Circuit as a Damped Oscillator
929
An RLC circuit combines a resistor, inductor, and capacitor, connected in a series or parallel combination.
Consider a series RLC circuit. Here, the presence of resistance in the circuit leads to energy loss due to joule heating in the resistance. Therefore, the total electromagnetic energy in the circuit is no longer constant and decreases with time. Since the magnitude of charge, current, and potential difference continuously decreases, their oscillations are said to be damped. This is...
Consider a series RLC circuit. Here, the presence of resistance in the circuit leads to energy loss due to joule heating in the resistance. Therefore, the total electromagnetic energy in the circuit is no longer constant and decreases with time. Since the magnitude of charge, current, and potential difference continuously decreases, their oscillations are said to be damped. This is...
929
Load-frequency control
144
Load-frequency control (LFC) is vital for maintaining power system stability, ensuring that frequency and power flows remain within acceptable limits during load changes. Turbine-governor control eliminates rotor accelerations and decelerations following load changes. However, a steady-state frequency error persists when the change in the turbine-governor reference setting is zero. In an interconnected power system, each area agrees to export or import a scheduled amount of power through...
144


