基于LabVIEW的自动控制原理虚拟实验系统设计
学生姓名：熊汉鑫 班级：090432 指导老师：刘清平
摘要：根据“自动控制原理”课程实验教学在高校实验实践中遇到的困难和实验教学改革的需要，本文提出了建立基于Labview的自动控制虚拟实验系统方案。文中分析了目前常见的虚拟实验系统，相应的应用Labview编程语言实现了包含“自动控制原理”课程常见实验的虚拟实验系统。最后，利用Matlab语言编程进行对比分析，进行正确性验证。 关键词：Labview；自动控制实验；Matlab
指导老师签名：
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Automatic control theory virtual experiment based on
LabVIEW System design
Student name :xionghanxin Class: 090432 Supervisor: liuqinping
Abstract:On the basis of problems encountered in actual experiment teaching of Automatic Control Theory in universities and need of experiment teaching revolution,a new kind of automatic control theory virtual experiment system based on Labview is advanced.Strong-point and weadness of common virtual experiment systems at present are analyzed and a virtual experiment system including common experiments in Automatic Control Theory is compleleted successfully using Labview equivalently.In addition,proposal for hardware experiment expansion is put forwand.At last,Matlab programming is used for comparison and accuracy certification.
Keywords:Labview;automatic control experiment;Matlab
Signature of Supervisor:
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目 录
第1章 绪论 .............................................................................................................. (1)
1.1 背景 ....................................................................................................................... (1) 1.2 课题的目的与意义 ............................................................................................... (2) 1.3 Labview的介绍 .................................................................................................. (3)
第2章 设计原理 .................................................................................................... (3)
2.1 一阶系统典型环节虚拟实验系统设计原理....................................................... (4) 2.1.1数学模型的介绍 .......................................................... (错误！未定义书签。) 2.1.2单位阶跃响应概括 ........................................................................................ (4) 2.2 二阶系统瞬态响应虚拟实验系统设计原理....................................................... (5) 2.2.1数学模型的介绍 ............................................................................................ (5) 2.2.2单位阶跃响应慨括 ........................................................................................ (5) 2.2.3动态性能 ........................................................................................................ (6) 2.3 系统校正虚拟实验系统设计原理 ....................................................................... (7) 2.3.1未校正系统的性能 ........................................................................................ (7) 2.3.2校正系统的确定 ............................................................................................ (8) 2.4 采样系统虚拟实验系统设计原理 ....................................................................... (8) 2.4.1“采样—保持器”组件 ................................................................................. (8) 2.4.2数学模型的介绍 ............................................................................................ (8) 2.5 采样系统校正虚拟实验系统设计原理 ............................................................... (9) 2.6 频率特性虚拟实验系统设计原理 ..................................................................... (10) 2.7 系统稳定性分析虚拟实验系统设计原理......................................................... (10) 2.7.1用特征方程的根判定系统稳定性 .............................................................. (10) 2.7.2绘制系统的单位阶跃响应曲线验证系统的稳定性 ................................... (11) 2.8 非线性系统虚拟实验系统设计原理 .................................................................. (11) 2.8.1继电型非线性三阶系统原理方框图 ............................................................. (11) 2.8.2振幅与角频率的计算 ................................................................................... (11)
第3章 程序方案设计 ........................................................................................ (13)
3.1总体设计 .............................................................................................................. (13) 3.2 基于Labview的虚拟实验系统设计 ................................................................. (13)
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3.3 用户管理程序设计 ......................................................................................... (14)
第4章 基于Labview的虚拟实验系统设计 ...................................... (16)
4.1 一阶系统典型环节虚拟实验 ......................................................................... (16) 4.1.1功能阐述 ................................................................................................... (16) 4.1.2设计过程 ................................................................................................... (16) 4.1.3 实验子系统Matlab的仿真 .................................................................... (17) 4.2 二阶系统瞬态响应虚拟实验 ......................................................................... (18) 4.2.1功能阐述 ................................................................................................... (18) 4.2.2设计过程 ................................................................................................... (18) 4.2.3实验子系统Matlab的仿真 ..................................................................... (21) 4.3 系统校正虚拟实验 ......................................................................................... (22) 4.3.1功能阐述 ................................................................................................... (22) 4.3.2设计过程 ................................................................................................... (23) 4.3.3实验子系统Matlab的仿真 ..................................................................... (25) 4.4 采样系统虚拟实验 ......................................................................................... (26) 4.4.1功能阐述 ................................................................................................... (26) 4.4.2设计过程 ................................................................................................... (26) 4.4.3实验子系统Matlab的仿真 ..................................................................... (28) 4.5 采样系统校正虚拟实验 ................................................................................. (29) 4.5.1功能阐述 ................................................................................................... (29) 4.5.2设计过程 ................................................................................................... (29) 4.5.3实验子系统Matlab的仿真 ..................................................................... (31) 4.6 频率特性虚拟实验 ......................................................................................... (32) 4.6.1功能阐述 ................................................................................................... (32) 4.6.2设计过程 ................................................................................................... (32) 4.6.3实验子系统Matlab的仿真 ..................................................................... (34) 4.7 系统稳定性分析虚拟实验 ............................................................................. (34) 4.7.1功能阐述 ................................................................................................... (34) 4.7.2设计过程 ................................................................................................... (35) 4.7.3实验子系统Matlab的仿真 ..................................................................... (36) 4.8 非线性系统虚拟实验 ..................................................................................... (37) 4.8.1功能阐述 ................................................................................................... (37) 4.8.2设计过程 ................................................................................................... (37)
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4.8.3在Matlab中绘制系统的-1/N与G（jw）轨迹 ........................................... (39)
第5章 用户管理程序的设计 .................................................................... (41)
5.1 登入系统的设计 ............................................................................................. (41) 5.2 主程序的设计 ................................................................................................. (41)
结论 ........................................................................................................................... (43) 参考文献 ................................................................................................................. (44) 致谢 ........................................................................................................................... (45) 附录Ⅰ 系统前面板图 ..................................................................................... (46) 附录Ⅱ 系统程序框图 ..................................................................................... (52)
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