双闭环直流调速系统设计

论文编号:JD059    字数:21045.页数:49

摘 要

本文对基于DSP的双闭环直流调速系统进行了研究，并设计出应用于直流电动机的双闭环直流调速系统。在参考相关资料基础上，结合控制理论的相关知识以及直流调速系统的新型算法，转速环采用模糊控制算法，电流环采用数字PI算法。在本系统的具体硬件实现上，采用了目前比较流行的数字信号处理器(DSP)作为系统的控制器，；软件设计中，进行电流环和速度环中控制量的计算以及相位角度的计算，产生脉冲触发信号。

关键词：DSP，模糊控制，直流调速。

ABSTRACT

DC motor has excellent character on speed regulation, such as smooth timing in a wide range, simple method. Meanwhile as its capability on overload, enduring frequent impacting load, it is widely used in area of high performance electric drive such as cutting machine tool, paper machine, etc

This paper researches DC-drive speed system with a dual-converter and dual-closed-loop based DSP, discussing a new control method that combines DSP with D C-drive, designs applies in direct current motor's double closed loop current velocity modulation system. The union control theory's related knowledge as well as the direct-current velocity modulation system's new algorithm, the rotational speed link uses the fuzzy control algorithm, the electric current link uses the digital PI algorithm. Used digital signal processor (DSP) to take system's controller, its processing speed was high, happen to tallied this realizes timeliness to request the high characteristic; in the design of software , calculate the current loop and speed ,and generate trigger signal pulse.

Key work: DSP; fuzzy control; DC speed regulation

摘要................................................................ III
ABSTRACT .............................................................III
第一章 绪论 ...........................................- 1 -
1.1研究背景和意义 .........................................- 1 -
1.2国内外研究现状和应用前景 .......................................- 1 -
1.3主要研究内容和主要技术指标 ......................................- 1 -
第二章 控制原理与方案确定.......................................... - 3 -
2.1直流调速系统的基本概念.......................................... - 3 -
2.2转速、电流双闭环调速系统........................................ - 4 -
2.2.1双闭环调速系统的组成 ..........................................- 4 -
2.2.2双闭环调速系统的工作原理..................................... - 5 -
2.3 控制方案的确定 ................................................- 7 -
2.3.1连续控制与数字控制的特点 ......................................- 7 -
2.3.2数字控制的双闭环直流调速系统............................. - 8 -
第三章 控制算法设计.............................................. - 9 -
3.1数字PID控制算法 .............................................- 9 -
3.1.1PID算法的数字实现 .............................................- 9
3.1.2数字PID控制算法的改进....................................... - 11 -
3.2 模糊控制算法 ..................................................- 12 -
3.2.1模糊控制的基本原理 ...........................................- 13 -
3.2.2模糊控制器介绍 ...............................................- 13 -
3.2.3模糊控制器设计 ...............................................- 15 -
第四章 硬件设计 ..................................................- 21 -
4.1控制系统的组成................................................. - 21 -
4.2主电路设计 ....................................................- 21 -
4.2.1整流输入电压选择 .............................................- 21 -
4.2.2 晶闸管保护环节.............................................. - 21 -
4.3 TMS320LF2407 DSP 简介 ........................................- 21 -
4.3.1TMS320LF2407A DSP的特点及引脚功能............................. - 22 -
4.3.2TMS320LF2407DSP的组成及结构 ..................................- 23
4.4数字触发器 ............................................. 23 -
4.4.1同步电路............................................. - 23 -
4.4.2定时控制移相角α .............................................- 25 -
4.5给定电路 .................................................- 26 -
4.6反馈电路...................................................... - 27 -
4.6.1速度反馈取样信号.............................................. - 27 -
4.6.2电流反馈 .....................................................- 28 -
4.7保护电路 ......................................................- 29 -
4.8脉冲功率放大电路 ................................................-30 -
第五章 软件设计 ...................................................- 31 -
5.1系统的软件结构................................................. - 31 -
5.2主程序 .........................................................- 31 -
5.3中断程序 .......................................... ............- 32 -
5.4电流环程序 .....................................................- 33 -
5.5速度环程序 ......................................... ...........- 34 -
第六章 系统整体分析 ................................... ............- 36 -
6.1系统组成 .......................................................- 36 -
6.1.1主电路分析 ...................................................- 37 -
6.1.2控制电路分析................................................. - 37 -
6.2系统参数设计分析................................................ - 38 -
6.2.1调节器参数................................................... - 38 -
6.2.2其他参数 ..................................................... 38 -
6.3动态性能分析 ..................................................- 39 -
结 论............................................................ - 41 -
参考文献 .........................................................- 42 -
致 谢 ............................................................- 43 -