摘要为了研究气动钉枪内部的动态特性（包括钉枪内部气体的温度，压力以及活塞运动的状况），要对整个气动钉枪进行建模，模型的整体是以整个气动钉枪为原型包括（蓄能腔室，无杆腔室和有杆腔室），分析影响气动钉枪工作的参数（温度T和压力P）。为了更好的建立模型，应该需要应用到变质量的气体理论。应用热力学的第一定律和能量守恒定律建立方程求解的气动钉枪内部的温度T和压力P。由于有未知的变量的，利用牛顿第二运动定律求解活塞的运动，求解出我们所需求的要建立的动态微分方程组。利用仿真的软件MATLAB建模仿真，得出气动钉枪中三大腔室的压力与温度的变化曲线，为了更好的研究，还需要活塞的运动曲线。将我们所得出的曲线集中归纳，分析气动钉枪工作时各腔室的情况，然后改变参数得出的曲线与原来的相比较，看怎样设计气动钉枪才能使气动钉枪的性能工作效率提高，让枪针以最大的初速度射出。50731

毕业论文关键字：气动钉枪，数学模型，仿真

Abstract

To study the dynamics within the pneumatic nailer (including nail inside the gas temperature, pressure, and movement of the piston position), to model the entire pneumatic nailer, the overall model is the prototype, including the pneumatic nailer (storage energy chamber rodless chamber and the rod chamber), analyzing the parameters affecting Nailer work (temperature T and pressure P). In order to better model the application should not need to change the quality of the gas theory. The first law of thermodynamics and the energy conservation law to establish equations to solve Nailer internal temperature T and pressure P. Solved using Newton's second law of motion derived unknown variables, the solution that we need to establish the dynamic differential equations.We solved the demand to establish a dynamic differential equations. The use of simulation modeling and simulation software MATLAB, come in three pneumatic nail gun chamber pressure and temperature curve, in order to better research, but also the movement of the piston curve. The resulting curve will be our focus induction, analysis Nailer work each chamber situation. Then change the parameters, the resulting curve is compared with the original to see how to design pneumatic nailer pneumatic nailer to make the performance work efficiency, so that needle injection at maximum initial velocity.

Keywords：Pneumatic nail gun；Mathematical model；Simulation

目录

第一章 绪论 1

1.1研究背景 1

1.2 国内外发展现状 3

1.3主要研究内容和意义 7

第二章 气动钉枪 8

2.1 气动钉枪的构造 8

2.2 气动钉枪的工作原理 9

第三章 气动钉枪的建模 11

3.1 变质量气体热力学过程数学模型 11

3.2对各个腔室进行建模 13

3.21蓄能腔的建模 14

3.22 无杆腔的建模 15

3.23 有杆腔的建模 15

3.3腔室的面积计算 16

3.3气缸中的活塞运动方程 17

3.4 气体的质流量计算 17

第四章 仿真及其结果分析 17

4.1 应用MATLAB进行仿真 17