基于DSP的超声换能器频率跟踪系统
|
摘要
频率自动跟踪技术是超声波电源的一个重要特性。针对传统的超声电源频率自动跟踪系统的不足,如频率跟踪范围太窄,失锁相及频率误跟踪等问题,提出了一种基于模糊控制和直接数字频率合成(DDS)相结合的混合控制策略。即通过模糊控制器实现频率的粗调,结合数字信号处理(DSP)技术实现模糊控制,通过硬件使用DDS实现频率精确跟踪。试验结果表明,研制的超声波电源具有频率跟踪速度快、准确的优点,并能实现系统的稳定、高效运行。
Frequency automatic tracking is a very important characteristic of ultrasonic power supply.Some weaknesses are found in traditional ultrasonic frequency tracking system,such as the narrow scale of frequency tracking and lose phase-locked and the tendency to track frequency mistakenly,etc.This peper proposes a novel hybrid control strategy which combines fuzzy control and direct digtal frequency aynthesis(DDS).The strategy includes coarse tracking by Fuzzy controller,combined with DSP technology to realize fuzzy control and refined tracking by DDS.The results show that the ultrasonic power supply using Fuzzy-DDS controller has the advantages of quick and accurate frequency tracking,and can make the vibrate system work stably and efficiently,thus it can improve power efficiency.
Frequency automatic tracking is a very important characteristic of ultrasonic power supply.Some weaknesses are found in traditional ultrasonic frequency tracking system,such as the narrow scale of frequency tracking and lose phase-locked and the tendency to track frequency mistakenly,etc.This peper proposes a novel hybrid control strategy which combines fuzzy control and direct digtal frequency aynthesis(DDS).The strategy includes coarse tracking by Fuzzy controller,combined with DSP technology to realize fuzzy control and refined tracking by DDS.The results show that the ultrasonic power supply using Fuzzy-DDS controller has the advantages of quick and accurate frequency tracking,and can make the vibrate system work stably and efficiently,thus it can improve power efficiency.
引文
[1]马春江.超声波电源系统平台研制[D].南京:南京航空航天大学,2010.
[2]胡红林,李春华,邵波.移相全桥零电压PWM软开关电路的研究[J].电力电子技术,2009,43(1):12-14.HU Honglin,LI Chunhua,SHAO Bo.Research on phase-drifted full-bridge ZVS converter[J].Power Electronics Technology,2009,43(1):12-14.
[3]王博,费莉,张俊平,等.基于DSP的正弦逆变电源设计[J].重庆理工大学学报:自然科学版,2013,27(2):106-110.WANG Bo,FEI Li,ZHANG Junping,et al.Design of sine wave inverter power supply based on DSP[J].Journal of Chongqing University of Technology:Natural Science,2013,27(2):106-110.
[4]王越,甄长飞.无刷直流电动机的DSP控制[J].重庆理工大学学报:自然科学版,2012,26(3):75-78.WANG Yue,ZHEN Changfei.DSP control of brushless DC motor[J].Journal of Chongqing University of Technology:Natural Science,2012,26(3):75-78.
[5]惠晶,臧小惠,张峰久.基于PI-DPLL复合控制的高频逆变电源研究[J].电力电子技术,2007,41(2):32-34.HUI Jing,ZANG Xiaohui,ZHANG Fengjiu.Research on HF inverter power supply based on PI-DPLL[J].Power Electronics Technology,2007,41(2):32-34.
[6]PONWIANGKAM N,KITTIRATSATCHA S.Switching frequency control based on phased-locked loop for a current-fed parallel resonant inverter[C]//S.l.:Fourth Power Conversion Conference,2007:157-161.
[7]吴卫华.基于DDS-PLL超声波电源的频率自动跟踪研究[J].电力电子技术,2009,43(11):61-63.WU Weihua.Research on the frequency automatic tracking in ultrasonic power based on DDS-PLL[J].Power ElectronicsTechnology,2009,43(11):61-63.
[8]于海生.计算机控制技术[M].北京:机械工业出版社,2007.
[9]李小雪,汪东,李平,等.基于DDS的超声换能器频率跟踪系统[J].压电与声光,2009,31(5):692-694.LI Xiaoxue,WANG Dong,LI Ping,et al.Frequency tracing system for piezoelectric transducer based on DDS[J].Piezoelectrics&Acoustooptics,2009,31(5):692-694.
[2]胡红林,李春华,邵波.移相全桥零电压PWM软开关电路的研究[J].电力电子技术,2009,43(1):12-14.HU Honglin,LI Chunhua,SHAO Bo.Research on phase-drifted full-bridge ZVS converter[J].Power Electronics Technology,2009,43(1):12-14.
[3]王博,费莉,张俊平,等.基于DSP的正弦逆变电源设计[J].重庆理工大学学报:自然科学版,2013,27(2):106-110.WANG Bo,FEI Li,ZHANG Junping,et al.Design of sine wave inverter power supply based on DSP[J].Journal of Chongqing University of Technology:Natural Science,2013,27(2):106-110.
[4]王越,甄长飞.无刷直流电动机的DSP控制[J].重庆理工大学学报:自然科学版,2012,26(3):75-78.WANG Yue,ZHEN Changfei.DSP control of brushless DC motor[J].Journal of Chongqing University of Technology:Natural Science,2012,26(3):75-78.
[5]惠晶,臧小惠,张峰久.基于PI-DPLL复合控制的高频逆变电源研究[J].电力电子技术,2007,41(2):32-34.HUI Jing,ZANG Xiaohui,ZHANG Fengjiu.Research on HF inverter power supply based on PI-DPLL[J].Power Electronics Technology,2007,41(2):32-34.
[6]PONWIANGKAM N,KITTIRATSATCHA S.Switching frequency control based on phased-locked loop for a current-fed parallel resonant inverter[C]//S.l.:Fourth Power Conversion Conference,2007:157-161.
[7]吴卫华.基于DDS-PLL超声波电源的频率自动跟踪研究[J].电力电子技术,2009,43(11):61-63.WU Weihua.Research on the frequency automatic tracking in ultrasonic power based on DDS-PLL[J].Power ElectronicsTechnology,2009,43(11):61-63.
[8]于海生.计算机控制技术[M].北京:机械工业出版社,2007.
[9]李小雪,汪东,李平,等.基于DDS的超声换能器频率跟踪系统[J].压电与声光,2009,31(5):692-694.LI Xiaoxue,WANG Dong,LI Ping,et al.Frequency tracing system for piezoelectric transducer based on DDS[J].Piezoelectrics&Acoustooptics,2009,31(5):692-694.