摘要
探讨了误差最小均方(LMS)法在电力智能传感器的电压分量中的运用。提出并分析和比较了获取电力智能传感器中电压有效值和初始相位角的几种方法,指出误差LMS法因降低了对电路性能的要求而能有效地简化系统、降低成本。仿真实验表明:直接根据定义分析电力参数,需要很高的采样频率与信噪比,而利用误差LMS法在获取电压有效值时采样频率可降低3倍,在求解初始相位角时对信号中干扰幅值的要求从小于信号幅值的5%可放宽到信号幅值的15%。
Application of error least mean square （LMS） method in voltage testing of power smart sensor is exploited. Several ways to obtain voltage RMB and initial phase angle, which are important power parameters but difficult to test in power smart sensor,are proposed,analyzed and compared. It is pointed out that when error LMS method is applied, the performance requirement can be declined and results in system simplified and cost reduced. Simulation results show that sample frequency and ratio of signal to noise are required very high to got power parameters according to their definition directly, however,if error LMS method is applied,the sample frequency can be declined triple when obtaining voltage RMB, and noise amplitude can be permitted from less 5 % to 15 % of signal amplitude when working out the initial phase angle.
出处
《传感器与微系统》
CSCD
北大核心
2008年第11期38-40,43,共4页
Transducer and Microsystem Technologies
关键词
智能传感器
信号处理
电压
smart sensor
signal processing
voltage
