本文選題：低溫等離子體 + 模糊PID控制��； 參考：《鄭州大學(xué)》2015年碩士論文

【摘要】：隨著現(xiàn)代生物醫(yī)學(xué)科技的不斷發(fā)展,人們對外科手術(shù)安全性和低創(chuàng)傷性的要求也越來越高。理想的手術(shù)效果是能在盡可能小的創(chuàng)口和出血量的情況下實現(xiàn)手術(shù)目的,這就對有源醫(yī)療電子設(shè)備的功率控制技術(shù)水平提出了更高的要求。然而就其復(fù)雜性及技術(shù)難度而言,生物醫(yī)學(xué)系統(tǒng)是世界上最難建模與控制的系統(tǒng),所有生物系統(tǒng)無一例外都是非線性系統(tǒng),其參數(shù)的時變性和個體間的差異是不能準(zhǔn)確測量的,其數(shù)學(xué)模型多數(shù)無法定量描述。針對普外科手術(shù)需求,為提高低溫等離子治療設(shè)備的功率穩(wěn)定性,本文綜合了模糊功率控制和PID功率控制的優(yōu)點,提出一種基于模糊PID控制算法的功率控制器,設(shè)計了醫(yī)用低溫等離子體治療儀。經(jīng)實驗分析驗證,低溫等離子體實驗組的手術(shù)時間、術(shù)中出血量以及切口長度均少于射頻等離子體手術(shù)組(P0.05);低溫等離子體手術(shù)組術(shù)后并發(fā)癥發(fā)生率顯著低于射頻等離子體手術(shù)組(P0.05)。在實驗應(yīng)用中,低溫等離子體治療儀能夠顯著減少術(shù)中出血和切口長度,縮短手術(shù)時間,降低術(shù)后并發(fā)癥,是安全、有效的電外科手術(shù)設(shè)備。第1章介紹了選題背景、研究意義和等離子體學(xué)科的研究現(xiàn)狀,并對本文的主要工作進(jìn)行了介紹。第2章對被控對象進(jìn)行了分析,介紹了醫(yī)用低溫等離子體的概念、低溫等離子體作用機制與工作原理。第3章介紹了等離子體治療儀各個模塊的設(shè)計過程,對功率控制等關(guān)鍵技術(shù)進(jìn)行了重點分析。第4章借助Matlab中的Simulink和Fuzzy工具箱對模糊PID功率控制系統(tǒng)進(jìn)行仿真分析,仿真結(jié)果表明模糊PID功率控制器比傳統(tǒng)PID控制器具有較小的超調(diào)量,更好的動態(tài)性能和較短的調(diào)節(jié)時間。第5章對應(yīng)用此功率控制算法的低溫等離子治療儀進(jìn)行了實驗驗證和統(tǒng)計分析,進(jìn)一步驗證了其實際功率控制效果。第6章總結(jié)了全文的工作,并對今后的工作進(jìn)行展望。
[Abstract]:With the development of modern biomedical science and technology, the requirements of surgical safety and low trauma are higher and higher. The ideal surgical effect is to achieve the objective of the operation under the condition of minimal wound and blood loss, which puts forward higher requirements for the power control technology level of active medical electronic equipment. However, in terms of its complexity and technical difficulty, biomedical systems are the most difficult systems in the world to model and control. All biological systems are nonlinear systems without exception. The time-varying parameters and the differences between individuals cannot be accurately measured. Most of its mathematical models can not be quantitatively described. In order to improve the power stability of low temperature plasma therapy equipment, this paper combines the advantages of fuzzy power control and pid power control, and proposes a power controller based on fuzzy pid control algorithm. A medical low temperature plasma therapeutic instrument was designed. The operation time of the experimental group with low temperature plasma was verified by experimental analysis. The amount of intraoperative bleeding and the length of incision were lower than those of radiofrequency plasma group (P0.05), and the incidence of postoperative complications in hypothermic plasma group was significantly lower than that in radiofrequency plasma group (P0.05). In the experimental application, the cryopulmonary plasma therapy instrument can significantly reduce intraoperative bleeding and incision length, shorten operation time and reduce postoperative complications. It is a safe and effective device for electrosurgical surgery. In chapter 1, the background, significance and research status of plasma are introduced, and the main work of this paper is introduced. In chapter 2, the controlled object is analyzed, and the concept, mechanism and working principle of medical low temperature plasma are introduced. In chapter 3, the design process of each module of plasma therapy instrument is introduced, and the key technologies such as power control are analyzed. In chapter 4, the fuzzy pid power control system is simulated and analyzed by using Simulink and Fuzzy toolbox in Matlab. The simulation results show that the fuzzy pid power controller has less overshoot, better dynamic performance and shorter adjusting time than the traditional pid controller. In chapter 5, the experimental verification and statistical analysis of the low temperature plasma therapy instrument using this power control algorithm are carried out, and the actual power control effect is further verified. Chapter 6 summarizes the work of this paper and looks forward to the future work.
【學(xué)位授予單位】：鄭州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TH789

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本文編號：2101120