恒压喷灌智能控制系统

【作者】 赵丽华；

【导师】 王柏林；

【作者基本信息】 河海大学 ， 控制理论与控制工程， 2001， 硕士

【摘要】 论文结合实际的工程，对恒压喷灌的现状进行了分析。传统的恒压喷灌是对水泵出水口的压力进行控制。此次设计的是一种新型的恒压喷灌控制器，它是对喷灌系统分干管末端进行控制。由于喷灌灌网系统难以准确建模，系统时滞严重。即使能够建模也很难对它进行控制。用传统的PID进行控制，效果不是很好。这里采用模糊控制对喷灌灌网进行控制。论文给出了控制器的软、硬件实现，及其模糊控制策略。并在VC平台上开发了一套仿真软件，对在喷灌系统中常用的两种控制方式与新型的控制方进行了对比。新型的恒压喷灌控制器采用的是末端控制（即分干管末端），这种控制方式可使喷头获得更好的喷水压力，并且使电机可进行更有效的调速，从而获得更好的节能效果。更多还原

【Abstract】 Based on actual engineering projects, the paper analyzes the present situation in controlling system of the constant pressure irrigation system. Traditional irrigation controlling system is used to control the pressure at the exit of a pump. The new constant pressure controller designed in this paper controls the terminals of branch irrigation system. Since it is difficult to model an accurate irrigation network system, its time lag takes place severely. Even though modelling can be set up, it is still hard to control this system. The traditional PID controlling does no better job. Now, the paper adopts a fuzzy control system for the irrigation network. The paper expounds the necessary software and hardware for the controller as well as the strategy for the fuzzy control system. In order to proof the accuracy arithmetically, I developed a simulation program in VC++ to compare the new controlling system with the two frequently used traditional ones in the irrigation system. The new constant pressure controller for irrigation system is used to control the terminal pressure (at the terminals of the branch pipes), and it can more effectively convert the frequencies of the moters. thus energy can be saved.更多还原