一项基于可调节的分数成本函数的积极冲动噪声控制研究
Hui Xu1, Tian Ran Lin1, He Qi Li1
1Qingdao Key Rail Transportation Laboratory for Noise and Vibration Control & Automated Fault Diagnostic, Qingdao University of Technology, Qingdao 266520, China.
The Journal of the Acoustical Society of America
|February 17, 2026
概括
本研究引入了一种增强的主动噪声控制 (ANC) 算法,该算法有效地管理具有有限衰变时间的冲动噪声. 新方法改善了各种噪音类型的噪声抑制,包括宽带高斯噪声.
科学领域:
- 声学 声学 在声学方面
- 信号处理 信号处理
- 控制系统 控制系统
背景情况:
- 经典的过-x最小平均平方 (FxLMS) 算法与冲动噪声作斗争.
- 现有的算法主要设计用于即时衰变的冲动,而不是具有有限衰变时间的现实世界冲动噪声.
- 目前的方法对具有有限衰变时间的冲动噪声的性能在很大程度上未经验证.
研究的目的:
- 提出一种增强的FxLMS算法,用于控制冲动噪声的主动噪声 (ANC).
- 为解决ANC系统中冲动噪声非高斯分布所带来的挑战.
- 提高ANC系统对各种噪音类型的融合速度和适应性.
主要方法:
- 用可调节的分数函数取代标准成本函数,用于非线性错误信号压缩.
- 引入了可调节的压缩因子,以根据不同的冲动噪声强度量身定制错误函数.
- 实现了一个时间变化的规范化函数,用于适应性步骤大小调整,以加快过器代趋同.
主要成果:
- 与现有的ANC算法相比,拟议的算法在控制具有有限衰变时间的冲动噪声方面表现出卓越的性能.
- 它还在抑制瞬间衰变的冲动噪声方面优于当前的方法.
- 改进的算法显示了对宽带高斯噪声的提高有效性.
结论:
- 增强的FxLMS算法为冲动噪声的活性噪声控制提供了强大的解决方案,特别是那些具有有限衰变特征的噪声.
- 非线性压缩和自适应式步骤尺寸调整有助于提高性能和更快的融合.
- 这种方法在更广泛的噪音条件下比现有的ANC技术提供了显著的改进.
相关概念视频
01:26Feedback control systems
735
Feedback control systems are categorized in various ways based on their design, analysis, and signal types.
Linear feedback systems are theoretical models that simplify analysis and design. These systems operate under the principle that their output is directly proportional to their input within certain ranges. For instance, an amplifier in a control system behaves linearly as long as the input signal remains within a specific range. However, most physical systems exhibit inherent nonlinearity...
Linear feedback systems are theoretical models that simplify analysis and design. These systems operate under the principle that their output is directly proportional to their input within certain ranges. For instance, an amplifier in a control system behaves linearly as long as the input signal remains within a specific range. However, most physical systems exhibit inherent nonlinearity...
735
01:28Load-frequency control
685
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...
685
01:25Active Filters
1.4K
Active filters are electronic circuits that use operational amplifiers (op-amps), resistors, and capacitors to filter out unwanted frequency components from a signal. A first-order low-pass active filter is designed to pass signals with a frequency lower than a certain cutoff frequency and attenuate frequencies higher than that cutoff frequency. The transfer function for a first-order low-pass active filter is:
1.4K
01:13Parameters Affecting Nonlinear Elimination: Zero-Order Input, First-Order Absorption and Two-Compartment Model
346
Drugs administered through various routes can lead to nonlinear elimination, resulting in complex pharmacokinetic behaviors crucial to understanding efficacious drug dosing.
When a drug is administered through a constant intravenous infusion and eliminated via nonlinear pharmacokinetics, it follows zero-order input. For example, oral drugs undergo first-order absorption upon administration and are eliminated through nonlinear pharmacokinetics.
In the case of subcutaneously administered drugs,...
When a drug is administered through a constant intravenous infusion and eliminated via nonlinear pharmacokinetics, it follows zero-order input. For example, oral drugs undergo first-order absorption upon administration and are eliminated through nonlinear pharmacokinetics.
In the case of subcutaneously administered drugs,...
346
01:07Time-Domain Interpretation of PD Control
413
Proportional-Derivative (PD) control is a widely used control method in various engineering systems to enhance stability and performance. In a system with only proportional control, common issues include high maximum overshoot and oscillation, observed in both the error signal and its rate of change. This behavior can be divided into three distinct phases: initial overshoot, subsequent undershoot, and gradual stabilization.
Consider the example of control of motor torque. Initially, a positive...
Consider the example of control of motor torque. Initially, a positive...
413
01:27Time and frequency -Domain Interpretation of PI Control
444
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...
444