基于直接推理的温室环境多变量模糊解耦控制

Multivariable Fuzzy Decoupling Control of a Greenhouse Environment Based on Direct Inference

针对温室环境控制的特点 ,提出一种多变量模糊控制器解耦结构 ,介绍了控制系统硬件组成 ,给出了执行机构的模糊规则和编程步骤。系统采用直接推理进行软件在线规则推理 ,既便于模糊规则的修改 ,又减少推理时间和内存使用量。系统已成功应用于温室环境控制 ,检测结果证明 ,系统响应快 ,超调量小 ,稳态误差小 。

Based on the feature of greenhouse environment control, a new structure of multivariable fuzzy decoupling controller was developed, the hardware formation in control system was introduced and fuzzy regulation of performing mechanism and programming process were given. This paper also introduced the regulation inferred directly with software. The method used in the system has the features of facilitating revision of fuzzy regulation, less time in inferring and less memory. It has been successfully applied into the greenhouse environment control. The authoritative department has tested it and the results showed that the system was quick response, small over adjusting and small error in steady state. The precision of control in temperature and relative humidity can meet the demands of cultivating plant in a greenhouse.