Load detection and fuzzy control in the power ultrasonic system

CAO Qun; ZHOU Zhao-ying; LUO Xiao-ning; ZHANG Yu-li

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Load detection and fuzzy control in the power ultrasonic system

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- Load detection and fuzzy control in the power ultrasonic system
- Optics and Precision Engineering Vol. 10, Issue 2, Pages: 135-138(2002)
- 作者机构：
  
  清华大学, 精仪系, 微机械北京,100084
- 作者简介：
- 基金信息：
- DOI：
  CLC： TH773
- Received：10 June 2001，
  
  Revised：09 January 2002，
  
  Published Online：15 April 2002，
  
  Published：15 April 2002
- 稿件说明：
移动端阅览
曹群, 周兆英, 罗晓宁, 张毓笠. 功率超声系统负载的检测及模糊控制[J]. 光学精密工程, 2002,(2): 135-138

CAO Qun, ZHOU Zhao-ying, LUO Xiao-ning, ZHANG Yu-li. Load detection and fuzzy control in the power ultrasonic system[J]. Editorial Office of Optics and Precision Engineering, 2002,(2): 135-138
曹群, 周兆英, 罗晓宁, 张毓笠. 功率超声系统负载的检测及模糊控制[J]. 光学精密工程, 2002,(2): 135-138 DOI：

CAO Qun, ZHOU Zhao-ying, LUO Xiao-ning, ZHANG Yu-li. Load detection and fuzzy control in the power ultrasonic system[J]. Editorial Office of Optics and Precision Engineering, 2002,(2): 135-138 DOI：

摘要

功率超声医疗设备在治疗的过程中

为了取得良好的超声乳化效果

要求振动系统在不同的负载下都具有较大的输出振幅

这就要求振动系统在不同的负载下都工作在匹配状态下.文章首先分析了纵向复合棒大功率换能器加接变幅杆和刀具的振动系统的等效机电模型

然后根据等效机电模型分析了功率超声振动系统动态阻抗匹配的基本原理.同时针对功率超声系统的工作特点设计了一种动态负载在线检测方法

得到反映负载状态及其变化趋势的参数

并根据识别出的动态负载确定出模糊控制器的输入输出参数.最后给出了一种实用的模糊控制算法进行振动系统的动态阻抗匹配.实验结果表明

利用模糊控制器进行动态阻抗匹配能保证振动系统在变负载的情况下仍然获取较高的电功率和较好的超声乳化效果.

Abstract

To acquire approved ultrasonic emulsification effects while using the power ultrasonic medical treatment instrument to cure patients

an ultrasonic vibration system is always needed to operate at a high vibration amplitude under different load conditions and to work in the electormechanical matching state under all load conditions. Firstly

the paper focuses on the equivalent electromechanical model to the power ultrasonic vibration system made up of a longitudinal composite-bar high-power transducer

a horn and a scalpel. Secondly

depending on the model

it analyzes the fundamental principles of dynamic impendence matching in the power ultrasonic vibration system. At the same time

according to the operating characteristics of the system

an approach to dynamic impedance on-line detecting has been devised and the parameters reflecting load state and change trend are obtained. Based on the identified dynamic load

the input and output parameters of the fuzzy controller can be determined.Finally

it presents an applied fuzzy control algorithm

which can be used as a dynamic impedance matching approach for the power ultrasonic vibration system. The experiment results show that when the power ultrasonic vibration system operates at the state of dynamic impedance matching by using the fuzzy control technique

the system can always have high electric power and good effects of the ultrasonic emulsification under the changing load.

关键词

Keywords

references

Cao Q, Zhou Zh Y.Frequency tracking automatically based on self-optimizing approach[A].4th International Symposium on Test and Measurement[C].2001,299-302.

Sun D, Zhou Z Y,Liu Y H, et al.Development and application of ultrasonic surgical instruments[J].IEEE Trans.Biomedical Eng.1997,44(6):462-467.

朱武,金长善.超声换能器振动系统控制的研究[J].哈尔滨理工大学学报,1999, 4(3): 46-49.

张庆,程维明.模糊控制在硫化温度控制中的应用[J].光学精密工程,2001,9(4): 385-387.

石孝文,荆涛.混沌序列的神经网络实现[J].光学精密工程,2000, 8(3): 231-233.

罗元丰,赵万生.电火花加工放电状态的检测及神经模糊控制[J].高技术通讯,2001, 11 (11): 72-74.

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Related Institution

School of Opto-Electronic Engineering， Changchun University of Science and Technology

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