采煤机负载功率谱分析技术

Shearer Load Power Signal Spectrum Analysis Technology

介绍了小波变换的基本概念和滤波特性,给出了小波变换作为一种新的分析工具在非平稳信号分析中的应用方法。采煤机负载功率信号具有很强的随机性,其负载特征是采煤机强度设计、控制系统设计和工作机构合理匹配设计的主要依据。应用小波变换的"可变焦"特性对采煤机负载功率信号进行了多尺度时频分析,分析结果对采煤机工作状况监控和采煤机的设计具有实际的应用价值。

The concepts and its filter of wavelet transform are introduced, the application of wavelet as a kind of new analysis tools in unstable signal analysis is presented. The load power signal of shearer is strong randomcity, its load feature is main basis of shearer intensity design and control system design and framework matching design. Applying ＂zoom lens having adjustable focus＂ of wavelet transform to provide multiple levels time - frequency analysis for load power signal of shearer, analysis results show that this way possess actual apply value for work status inspect and design of shearer.