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

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (17) : 178-184.

CHENG Xiefeng1,2,SHE Chenjun1,LI Ji1

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Abstract

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.

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heart sound / chaotic characteristic / chaos anti-control / nonlinear analysis

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CHENG Xiefeng1,2,SHE Chenjun1,LI Ji1. Anti-control method of heart sound based on its chaotic characteristics[J]. Journal of Vibration and Shock, 2018, 37(17): 178-184

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