壓電式氣動伺服閥的特性研究
發(fā)布時間：2018-08-02 13:33
【摘要】：氣動系統(tǒng)具有無污染、結構簡單、價格低廉等一系列的優(yōu)點,因此被廣泛應用于機械制造業(yè)以及其他各行各業(yè)中。近年來,隨著壓電材料的發(fā)展,把壓電材料的電—機械轉換特性引入到氣動閥中,作為氣動閥的電—機械轉換級,加快了氣動技術的發(fā)展。壓電驅動利用壓電晶體的逆壓電效應形成驅動力,并且壓電晶體產(chǎn)生的位移與輸入信號有較好的線性關系,控制方便,產(chǎn)生的驅動力大,帶負載能力強,功耗低,響應快,將它作為驅動元件取代電磁線圈來構造氣動伺服閥,可以使伺服閥小型化和實現(xiàn)對輸出信號的高精度控制。 根據(jù)實際情況對氣動伺服閥模型的簡潔性和精確性進行了折衷的考慮,忽略了一些次要因素,建立了既能反映系統(tǒng)內在本質特性,又能簡化分析計算工作的壓電驅動式氣動伺服閥的數(shù)學模型。 本論文通過MATLAB和AMEsim軟件仿真分析結果表明：壓電氣動伺服閥的頻率為313Hz,頻寬達到438Hz,響應時間為3.3ms,并且能對輸入信號進行快速、精確的跟蹤,驗證了壓電氣動伺服閥的良好動態(tài)特性。 通過對壓電氣動伺服閥施加PID控制和PID神經(jīng)網(wǎng)絡控制進行特性仿真研究,獲得施加PID控制的壓電氣動伺服閥的響應時間約為3.1 ms,而運用PID神經(jīng)網(wǎng)絡控制器后,壓電氣動伺服閥的單位階躍響應時間縮短為2.8ms,并且后者對輸入信號有很強的快速、精確的跟蹤能力,并針對兩種控制的仿真曲線進行了比較分析。 本文最后是對壓電式氣動伺服閥的研究進行了總結,并提出在以后時間里研究的重點和方向。
[Abstract]:Pneumatic system has a series of advantages, such as no pollution, simple structure, low price and so on, so it is widely used in machinery manufacturing and other industries. In recent years, with the development of piezoelectric materials, the electro-mechanical conversion characteristics of piezoelectric materials are introduced into pneumatic valves. As the electro-mechanical conversion stage of pneumatic valves, the development of pneumatic technology is accelerated. The piezoelectric drive uses the inverse piezoelectric effect of the piezoelectric crystal to form the driving force, and the displacement generated by the piezoelectric crystal has a good linear relationship with the input signal. It is easy to control, and the driving force is large, the load capacity is strong, the power consumption is low, and the response is fast. The pneumatic servo valve can be constructed by replacing the electromagnetic coil as a driving element, which can miniaturize the servo valve and realize the high precision control of the output signal. According to the actual situation, the conciseness and accuracy of the pneumatic servo valve model are considered in a compromise, and some minor factors are ignored, and the essential characteristics of the system can be reflected. The mathematical model of piezoelectric actuated pneumatic servo valve can be simplified. The simulation results of MATLAB and AMEsim show that the piezoelectric pneumatic servo valve has a frequency of 313Hz, a bandwidth of 438Hz and a response time of 3.3ms.It can track the input signal quickly and accurately. The good dynamic characteristics of piezoelectric pneumatic servo valve are verified. By simulating the characteristics of piezoelectric pneumatic servo valve with PID control and PID neural network control, the response time of piezoelectric pneumatic servo valve with PID control is about 3.1 Ms, and the response time of the piezoelectric pneumatic servo valve applying PID neural network controller is about 3.1 ms.After the application of PID neural network controller, the response time of piezoelectric pneumatic servo valve with PID control is obtained. The unit step response time of piezoelectric pneumatic servo valve is shortened to 2.8 Ms, and the latter has very fast and accurate tracking ability to input signal. The simulation curves of the two kinds of control are compared and analyzed. At the end of this paper, the research of piezoelectric pneumatic servo valve is summarized, and the emphasis and direction of the research in the future are put forward.
【學位授予單位】：昆明理工大學
【學位級別】：碩士
【學位授予年份】：2011
【分類號】：TH138.52
本文編號：2159592
[Abstract]:Pneumatic system has a series of advantages, such as no pollution, simple structure, low price and so on, so it is widely used in machinery manufacturing and other industries. In recent years, with the development of piezoelectric materials, the electro-mechanical conversion characteristics of piezoelectric materials are introduced into pneumatic valves. As the electro-mechanical conversion stage of pneumatic valves, the development of pneumatic technology is accelerated. The piezoelectric drive uses the inverse piezoelectric effect of the piezoelectric crystal to form the driving force, and the displacement generated by the piezoelectric crystal has a good linear relationship with the input signal. It is easy to control, and the driving force is large, the load capacity is strong, the power consumption is low, and the response is fast. The pneumatic servo valve can be constructed by replacing the electromagnetic coil as a driving element, which can miniaturize the servo valve and realize the high precision control of the output signal. According to the actual situation, the conciseness and accuracy of the pneumatic servo valve model are considered in a compromise, and some minor factors are ignored, and the essential characteristics of the system can be reflected. The mathematical model of piezoelectric actuated pneumatic servo valve can be simplified. The simulation results of MATLAB and AMEsim show that the piezoelectric pneumatic servo valve has a frequency of 313Hz, a bandwidth of 438Hz and a response time of 3.3ms.It can track the input signal quickly and accurately. The good dynamic characteristics of piezoelectric pneumatic servo valve are verified. By simulating the characteristics of piezoelectric pneumatic servo valve with PID control and PID neural network control, the response time of piezoelectric pneumatic servo valve with PID control is about 3.1 Ms, and the response time of the piezoelectric pneumatic servo valve applying PID neural network controller is about 3.1 ms.After the application of PID neural network controller, the response time of piezoelectric pneumatic servo valve with PID control is obtained. The unit step response time of piezoelectric pneumatic servo valve is shortened to 2.8 Ms, and the latter has very fast and accurate tracking ability to input signal. The simulation curves of the two kinds of control are compared and analyzed. At the end of this paper, the research of piezoelectric pneumatic servo valve is summarized, and the emphasis and direction of the research in the future are put forward.
【學位授予單位】：昆明理工大學
【學位級別】：碩士
【學位授予年份】：2011
【分類號】：TH138.52
【引證文獻】
相關碩士學位論文 前1條
1 吳松濤;全液壓鉛殘極板移載機械手的數(shù)字樣機研究[D];昆明理工大學;2012年
，本文編號：2159592
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