摘要运动速度很高的气缸，在行程末端需要快速制动和换向时，气缸的活塞杆会对气缸有很大冲击力，减少气缸使用寿命甚至会损坏气缸，所以，为了减小气缸的冲击、延长气缸的工作寿命、满足工作精度等要求，缓冲尤为重要。永磁涡流制动技术作为一种新的制动方式具有制动力稳定、无噪声污染、寿命长、结构简单、制动力大等优点，在游乐设施、交通运输车辆等领域已经有很多成功的应用。41891

本文提出了一种基于永磁涡流制动技术新的气缸缓冲方式，给出了永磁涡流制动器的模型，推导了其制动力计算公式并用MATLAB编程进行计算。然后建立了气缸的数学模型，搭建气缸Simulink仿真框图进行仿真研究，从仿真结果可以看出永磁涡流制动器对气缸有良好的缓冲作用。建立了永磁涡流制动实验装置，通过测量永磁体下落过程中的加速度，计算得到的永磁涡流制动力与根据公式数值计算得到的永磁涡流制动力基本一致。 

毕业论文关键词： 永磁体 涡流 气缸 缓冲

毕业设计说明书外文摘要

Title   Research of Cylinder Cushioned Technology Based on Permanent Magnet Eddy Current Braking        

Abstract

When the speed of cylinder is high, requiring quickly braking and switching, cylinder piston rod will have a great impact on cylinder which reduces the lifetime of cylinder, even damages the cylinder. So the cushion of cylinder is important in order to reduce the impact of cylinder, extend lifetime of cylinder, satisfy the requirements of working precision and so on. As a new braking mode,the permanent magnet eddy current braking technology has the advantages of stable power, no noise pollution, long service life, simple structure and large braking force. There have been many successful applications in the field of recreation facilities, transportation vehicles and so on.

This paper presents a new cylinder cushioned technology based on permanent magnet eddy current braking and gives the model of the permanent magnet eddy current braking.It derivates formula of braking force and calculates with MATLAB program. Then it establishes a mathematical model of the cylinder and build cylinder simulation block diagram of Simulink to simulate. From the simulation results, it can be seen that the permanent magnet eddy current brake has a good buffer on cylinder .Permanent magnet eddy current braking test device is established. By measuring the acceleration in the falling process of the permanent magnet，we calculate the permanent magnet eddy current braking force and it agrees with the results calculated from the formula.

Keywords：Permanent Magnet  Eddy Current  Cylinder  Cushion

 目   次

1  绪论 1

1.1 研究背景及意义 1

1.2 气缸缓冲方式 2

1.3 永磁涡流制动技术 3

1.4 研究内容 4

2 永磁涡流制动器理论分析 5

2.1基于永磁涡流制动的气缸缓冲结构方案 5

2.2永磁涡流制动器模型 5

2.3圆柱形永磁体的磁感应强度计算 6

2.4 永磁体的有限元分析 10

2.5涡流阻力的计算 12

3  气缸的数学建模与仿真分析 13

3.1气缸的数学建模 13

3.2 气缸仿真分析