摘要
清香型乌龙茶烘焙机温湿度控制存在严重交叉耦合及大滞后特性,其模型参数不确定,难以获取精确的温湿度控制精度。利用模糊推理合成规则,提出了一种有效的交叉解耦手段,获取较精确的温湿度控制结果,较好解决了控制对象的交叉耦合和滞后问题。MATLAB(matrix laboratory)软件仿真结果表明该方法响应速度快,控制精度高、超调量小,无需建立精确的系统模型,能够满足茶叶烘焙机温湿度精密控制的要求。实际运行表明,温湿度误差可控制在理想的精度范围,温度控制误差不大于1℃,相对湿度误差不大于2.5%。
The control of temperature and humidity of fen-flavor Oolong-tea roaster is always cross-coupling and severely lagging, so it is difficult to obtain the accurate precision of temperature and humidity due to its uncertain model parameters. In this study, the fuzzy reasoning synthesizing rule was adopted to propose an effective cross-decoupling means and obtain more accurate results for temperature and humidity control, which can better solve the cross-coupling and the lagging problem of the control object. MATLAB simulation results showed that this method exhibits fast response, high control precision and small overshoot. Besides, it is need to establish an accurate system model so it can achieve the precise temperature and humidity control of the tea baker. Practical operation indicated that the error of the temperature and humidity can be controlled within the desired precision range, and the temperature control error was not more than 1℃, while the relative humidity error was not more than 2.5%.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2012年第20期80-87,共8页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家科技支撑计划专项(2007BAD07B06)
福建省自然科学基金计划项目(项目编号:2009J01259)
福建省高等学校新世纪优秀人才支持计划(闽教科〔2007〕20号)资助
关键词
耦合
模糊控制
机械
乌龙茶烘焙机
温湿度控制
交叉耦合
模糊解耦
交叉补偿解耦
coupling, fuzzy control, machinery, Oolong-tea roaster, temperature and humidity control, cross coupling, fuzzy decoupling, cross-compensation decoupling
