zikuziliao

　　　锅炉是工业过程中不可缺少的动力设备，为确保安全，稳定生产，对锅炉的自动控制十分重要。汽包水位是锅炉运行的主要指标，汽包水位过高过低都会影响运行的安全与经济性，必须严格加以控制。本文主要是用MATLAB对锅炉汽包水位控制系统进行仿真研究。建立了锅炉汽包水位对象的数学模型和控制系统，并用Matlab语言在计算机上编制锅炉汽包水位控制系统的仿真程序。通过对象特性、最佳PID参数整定、控制系统比较分析，了解了汽包水位对象特性、整定出了最佳PID参数、总结出了各种控制方案的特点与适用场合。 (　　　Boiler is a necessary power plant in the process of industry. In order to ensure the production and security, the auto-control of it is very important. The drum water level is an important variable to be controlled, it is hard to get the mathematic model of the water level with adjustive process, it is characteristic of nonlinearity, instability and time lag. The traditional control mode of three-variable in the drum water level mostly use PID.The problem of automatic control in industry coal-fired boiler is discussed in this thesis. First of all，the technological process and characteristics of industry boiler is analyzed. The task of boiler regulator is expounded. And then the system scheme of control is presented. The dynamic characteristic of loops for water level is analyzed especially the reason of ostensible water level. On the basis of these a routine PID controller is designed to control the water level. The part of differential is sensitive to high frequency noise, and easi)

stm32控制超声波精确快速测距，误差在0.1cm，通过LCD显示测量值(STM32 control ultrasonic quick and accurate location, the error in 0.1cm, as revealed by LCD measurements)

实现1.8寸tft彩屏的驱动，能够显示字符，汉字，以及图片。(Achieve 1.8-inch tft color screen driver, can display characters, characters, and images.)

说明：  四方的通信管理机程序，绝对的超值，很多规约的处理，101 103 103 104 CDT DNP SC1801 CSC2000等，千万别走漏风声啊，(sifang processs protel control center )

220VAC的EMC滤波电路，加220AC转12VDC(220VAC EMC filter circuit, plus 220AC to 12VDC)

这是一个楼禁门宇系统的程序，经过调试仿真，结果良好，但是有待改进(This is a building ban door-yu system procedures, after debugging emulator with good results, but could be improved)

快速傅里叶算法的stm官方库，可以实现快速傅里叶算法，实测有效(the fft library of stm32f1)

M1卡初值使用方法 适用M1卡开发人员(The applicable M1 the initial M1 card use card developers)

51单片机实现LED恒流，LM358加三极管(51 MCU LED constant current)

说明：  2003电子设计题答案，一个智能小车的实现(2003 Electronic Design question answer, the realization of a smart car)