基于混沌特性的心音反控制方法研究  

Anti-control method of heart sound based on its chaotic characteristics

作　　者：成谢锋[1,2] 佘辰俊 李吉 CHENG Xiefeng;SHE Chenjun;LI Ji(College of Electronic Science and Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China;Nation-Local Joint Project Engineering Lab of RF Integration&Micropackage,Nanjing University of Posts and Telecommunications,Nanjing 210003,China)

机构地区：[1]南京邮电大学电子科学与工程学院,南京210003 [2]南京邮电大学射频集成与微组装技术国家地方联合工程实验室,南京210003

出　　处：《振动与冲击》2018年第17期178-184,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金(61271334);江苏省普通高校研究生科研创新计划项目(KYLX16_0648)

摘　　要：针对正常心音信号和病理心音信号所存在的混沌特性差异,提出了一种将病理心音对正常心音进行跟踪的心音混沌反控制方法。首先提出了心音混沌反控制方法的设计原则和标准,在此基础上设计了一种结合TD与FuzzyPID控制理论的心音信号混沌反控制方法,当输入病理心音时,控制方法能根据另一路读取的正常心音实时自整定PID参数,快速地使病理心音跟踪上正常心音。实验结果与定量分析表明,该控制方法跟踪速度快、误差小、鲁棒性好,控制后的病理心音信号可以很好地对正常心音信号进行轨迹跟踪,且混沌特性得到明显增强。这种心音信号混沌反控制方法,可以用于开发心血管疾病的相关医疗辅助理疗设备,具有可行性和实用性。Aiming at chaotic characteristic difference between a normal heart sound signal and a pathological one,an anti-control method for heart sound chaos making the pathological heart sound track the normal one was put forward.Here,firstly,the design principle and standard for the heart sound chaos anti-control method were proposed.Then,a heart sound chaos anti-control method combining TD and Fuzzy-PID control theories was designed.When pathological heart sounds were input,the control method adjusted PID parameters according to the normal heart sound read from the other path to make the former rapidly trace the latter.The test results and quantitative analysis showed that the proposed control method has the advantages of fast tracking speed,small error and good robustness;the controlled pathological heart sound signal can trace the normal one well and its chaotic characteristics are obviously enhanced;this heart sound chaos anti-control method can be used to develop the related medical auxiliary physiotherapy equipment of cardiovascular disease with feasibility and practicability.

关 键 词：心音信号 混沌 混沌反控制 非线性分析 

分 类 号：TP11[自动化与计算机技术—控制理论与控制工程]