CAJ | 학술논문

目前铣削去重平衡机电气测量系统是由微控制器和外围器件级联而成,集成度低、信号处理算法单一、测量误差大,对实现智能铣削有很大的限制.基于此,提出了基于嵌入式OMAP的自动铣削去重平衡机电气测量系统的实现方法.首先,通过OMAP双核架构中的ARM子系统完成对平衡机电气测量系统的控制功能,DSP子系统实现数字信号处理和不平衡量的解算;其次设计实现了基于谐波小波包的数字带通跟踪滤波器;最后利用谐波小波包在频域对信号进行无限细分的特性来提取任意一段微弱信号的特征.仿真及测试结果表明,该系统有效抑制了近频信号干扰,提高了信噪比,并对初始不平衡信号特征实现有效还原.
목전선삭거중평형궤전기측량계통시유미공제기화외위기건급련이성,집성도저、신호처리산법단일、측량오차대,대실현지능선삭유흔대적한제.기우차,제출료기우감입식OMAP적자동선삭거중평형궤전기측량계통적실현방법.수선,통과OMAP쌍핵가구중적ARM자계통완성대평형궤전기측량계통적공제공능,DSP자계통실현수자신호처리화불평형량적해산;기차설계실현료기우해파소파포적수자대통근종려파기;최후이용해파소파포재빈역대신호진행무한세분적특성래제취임의일단미약신호적특정.방진급측시결과표명,해계통유효억제료근빈신호간우,제고료신조비,병대초시불평형신호특정실현유효환원.
Electrical measurement system in milling balance machine currently consists of microcontroller and peripheral devices. The structure has the problems which include low integration, single signal processing algorithms and great measurement error. Therefore, electrical measurement system in milling balance machine based on embedded optimiza-tion is presented in the paper. Firstly,the device control electrical measuring system by ARM subsystem of OMAP du-al-core architecture, and DSP subsystem realizes digital signal processing and unbalance computing. Secondly, the sys-tem implement digital band-pass tracking filter based on harmonic wavelet packet. Thirdly,the system extracts any pe-riod of weak signal characteristics using the unlimited segmentation features harmonic for wavelet packet signal in the frequency domain. Simulation and test results show that the system effectively inhibits nearly frequency signal interfer-ence,improves signal to noise ratio,and reduces the initial imbalance signal characteristics.