基于delta算子实现的多谐振控制器字长效应分析  

Analysis of Word Length Effect of Multi-resonant Controller Based on delta Operator

作　　者：陈成[1] 张朔[1] 吴攀峰 胡海兵[1] CHEN Cheng;ZHANG Shuo;WU Pan-feng;HU Hai-bing(Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China)

机构地区：[1]南京航空航天大学,江苏南京211106

出　　处：《电力电子技术》2023年第11期6-8,共3页Power Electronics

摘　　要：在谐振控制器定点数字实现时,有限字长效应会导致控制器极点发生严重偏移,影响补偿性能。针对定点数字长效应引入的非线性误差的问题,引入delta算子将谐振控制器从离散z域转换到离散delta域。相比z算子,delta算子能够在字长较短情况下实现对连续时间域更好的逼近,提升了补偿精度、降低了计算资源。In the fixed-point digital implementation of resonant controllers,the finite word long effect can lead to a se-rious offset of the controller poles which affects the compensation performance.To address the problem of nonlinear er-rors introduced by the fixed-point digital long effect,the delta operator is introduced to convert the resonant con-troller from the discrete z domain to the discrete delta domain.The delta operator can achieve a better approximation to the continuous time domain with a shorter word length than the z operator which improves the compensation accu-racy and reduces the computational resources.

关 键 词：多谐振控制器 定点数字实现 定点数字 

分 类 号：TM571[电气工程—电器]