机电式流量阀的模糊控制实现与测试

为在线混药式变量喷雾农药流量检测设计一种机电式流量控制阀和流量控制系统。采用模糊控制算法，依托STC12C5410AD单片机实现对农药流量的模糊控制。对所设计的系统进行静态跟踪测试和动态响应测试，静态跟踪误差为±3.0%；初始流量为1.5 mL/s，目标流量为3.1 mL/s，阶跃响应曲线上升时间为0.35 s，绝对稳态误差为 ±0.1 mL/s，相对稳态误差在±3.2%以内。测试结果表明该流量阀采用模糊控制，其控制性能，超调量、响应时间和稳态误差能达到变量喷雾的要求。

Fuzzy control implementing and testing on electromechanical flow valve

A flow control valve based on electromechanical method and a flow control system was designed for farm chemical flow control at vehicular variable sprayer according to the requirements of real-time mixing pesticide variable spray. Employing fuzzy control algorithm and relied on STC12C5410AD MCU, the fuzzy controller for farm chemical flow was implemented. Static tracking testing and dynamic response testing were carried out for designed system. The static tracking error was ±3.0%; dynamic response state error was ±3.2%, and response time was about 0.35s when the initial value was 1.5 mL/s and final value was 3.1 mL/s. The results of measurement and test show that fuzzy controller has good control performance on this flow valve; over-shoot, response time and steady state error are all to achieve control requirements.