CAJ | 학술논문

曲线拟合法从原理上能够实现正弦信号失真度计算，但正弦曲线拟合是一个四参数优化问题，传统算法在求取全局最优解时对初值敏感并容易陷入局部极值，这限制了曲线拟合法在失真度测量中的应用。针对正弦曲线拟合困难的问题，提出了一种三参数曲线拟合算法，设计并实现了一款基于 ARM 的交流电失真度测量仪，并对其硬件和软件设计中的关键技术进行了说明。测试表明，该方法能够完成交流电失真度的测量，设备运行稳定，满足应用要求。
곡선의합법종원리상능구실현정현신호실진도계산，단정현곡선의합시일개사삼수우화문제，전통산법재구취전국최우해시대초치민감병용역함입국부겁치，저한제료곡선의합법재실진도측량중적응용。침대정현곡선의합곤난적문제，제출료일충삼삼수곡선의합산법，설계병실현료일관기우 ARM 적교류전실진도측량의，병대기경건화연건설계중적관건기술진행료설명。측시표명，해방법능구완성교류전실진도적측량，설비운행은정，만족응용요구。
The sine wave distortion factor can be calculated by the curve - fitting method theoretically,but the sine wave curve - fitting is a four - parameter optimization problem,which makes the traditional algorithm easily fall into local extremum in calculating the globally optimal solution since it is sensitive to the initial value. Thus this will limit the application of curve - fitting in distortion factor calculation. Aiming at such a problem,a three - parameter curve- fitfting method has been introduced. Then an ARM based AC distortion factor measurement has been developed and the key technology in hardware and software design has been illustrated. Experimental results show that the method can complete the AC distortion factor measurement and meet the application requirements.