Aimed at rapidity and low power consumption required by intelligent mines,based on correlation theory and pattern recognition technology,a new method is given,in which helicopter noise signal of time domain is analyzed directly,that is to estimate fundamental frequency by calculating self-correlation function,then recognize target thinking of the fundamental frequency as characteristic quantity.
针对智能雷弹要求其预警系统对目标快速识别和低功耗工作的特点,根据相关理论和模式识别技术,提出了直接分析所接收的直升机噪声时域信号的方法,即利用自相关函数估计信号基频,以被测信号基频为特征量进行目标识别的方法。
The differentiation and extraction for the helicopter noise based on the two-dimensional spectral analysis
基于二维频谱方法的直升机噪声源的分辨与提取
Investigation on the Blade-Vortex Interaction Aerodynamic Noise of Helicopter Rotors;
直升机旋翼桨—涡干扰气动噪声的研究
Numerical prediction for the acoustic noise of helicopter rotor in forward flight
前飞状态下直升机旋翼旋转噪声预测
Active Noise Control System in the Cabin of Helicopter Based on DSP
基于DSP的直升机舱室内的有源噪声控制系统
Analysis on the Relationship Between Rise Rate of Cylinder Pressure and Combustion Noise
车用柴油机气缸压力升高率与燃烧噪声的关系
Study of Effect of Shearer Parameters on Noise and Temperature of Coal Working Face;
采煤机参数对工作面噪声和温升影响的研究
Stimulation Mechanism of Combustion Noise in Transient Condition of DI-Diesel Engine;
直喷式柴油机瞬态工况燃烧噪声激励机理研究
Mechanism of Combustion Noise of Turbocharged Direct Injection Diesel Engine in Transient Conditions;
直喷式增压柴油机瞬态工况燃烧噪声机理研究
Research on Noise and Its Reduction for Permanent Magnet Brushless DC Motor
永磁无刷直流电机噪声分析及降噪设计方法的研究
" Get that helicopter here! " he shouts.
"让那架直升飞机到这儿来!"他大声叫道。
Get that helicopter here!” he shouts.
让那架直升飞机到这儿来!"他大声叫道。
A direct method is developed for the noise diagnosis to the head-stock of machine tool.
本文提出机床变速箱噪声直接诊断方法。
Analysis and Research of Noise of DC Traction Motor for City Railcars
轨道车辆直流牵引电机噪声的分析与研究
Analysis of the Noise for DPSK Receiver with MZI Balanced Direct Detection;
采用平衡接收直接检测的DPSK接收机噪声分析
Analysis of the noise statistics for DPSK receiver with MZI balanced direct detection
平衡接收直接检测DPSK接收机噪声统计特性分析
Design Computing of AC-DC Motor's Air Noise in Ship
舰船用交直流电机空气噪声谱设计计算
Design of a Repeaters Low Noise Amplifier
直放站低噪声放大器的计算机仿真设计
The Anti-sub Simulation System Using Dipping Sonar Based on HLA;
基于HLA的直升机吊放声纳搜潜仿真系统