单片机工艺淬火炉控制系统的设计与仿真.doc

摘 要 单片机工艺淬火炉控制系统是工业生产中比较典型的一种控制系统，它对控制精度、安全性要求高，并且温度的变化必须严格按照给定的升温、保温、降温曲线运行。也保证生产过程中对蒸汽的需要。温度控制系统都有纯滞后环节，所以一般PID控制系统都会通过史密斯（Smith）预估器的设计改进来消除系统的超调和震荡补偿系统的纯滞后环节。使系统稳定。 温度控制系统的硬件分4个部分，1.输入部分：键盘主要采用键盘独立输入方式，键盘采用软件消除抖动；2.A/D采样单元：将转换的温度值的模拟量经过运算放大器进行放大、滤波处理，然后送入MAX1241进行A/D转换；3显示单元：将通过A/D转换后的模拟量与给定值进行比较后在进行控制算法之后再通过显示器显示出来。4.驱动执行部分：通过使用光电耦合，实现了良好的电绝缘和抗干扰能力，然后通过三极管来驱动继电器的开与合，进而控制锅炉两端的电压。 这个设计通过PROTEUS对系统的硬件部分进行仿真，然后再通过 MATLAB/SIMULINK的仿真结果验证数字控制器设计的正确性。 关键词：单片机，温度控制，锅炉,史密斯预估器，纯滞后 ABSTRACT Microcontroller technology quenching furnace control system in industrial production is a kind of typical control system. It on the control accuracy, high security requirements, and the change of the temperature must be in strict accordance with the given temperature, heat preservation, cooling curve. Also ensure the production process to the needs of the steam. Temperature control system with pure delay link, so general PID control system can by Smith (Smith) estimates of design improvements to eliminate the system overshoot and oscillation of the compensation system of pure delay link. Make the system stable. Temperature control system hardware is divided into four parts. 1.Enter some:Keyboard mainly adopts independent keyboard input methods . The keyboard USES the software to eliminate jitter. 2.A/D sampling unit:Will transform the temperature value of the analog through operational amplifier amplification, filtering processing, then into MAX1241 A/D conversion. 3.display unit:Through A/D conversion analog comparing with given value after again after control algorithm through the monitor display. 4. Drive execution part:Through the use of photoelectric coupling. Good electric insulation and anti-jamming capability is realized.And then by using a transistor to drive the relay to open and close. To control the voltage at the ends of the boiler. The design of the hardware part of the system through PROTEUS simulation. And then through the MATLAB/SIM