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Fundamental Studies on Grain Drier Control by Learning Method

学习法粮食干燥控制的基础研究

基本信息

批准号：
02660247
负责人：
NISHIYAMA Yoshio
金额：
$ 1.47万
依托单位：
Iwate University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1992
项目状态：
已结题

项目摘要

In order to control grain dryer to produce high quality of grain from unreliable probability control element, we proposed a "learning Method". Learning method starts from finding the best control sequence by learning and the real control is traced on the best control way.To improve the control accuracy, it is necessary to improve the sensing techniques for measuring quality of grain before and during drying. The proposed method of measuring quality of high moisture paddy rice is such; Dehulling high moisture paddy by impeller type rice husker, and dehulled rice (brown rice) is inspected on the outer quality by outer quality tester and inner quality by NIR analyzer. Availability of this way was assured. This method is adapted by a company to manufacture a commercial tester. Dynamic characteristics of impeller husker was investigated and the law of proportion in terms of r.p.m. of dehulling fan was found.As a drying method for producing high quality grain at low cost, Nishiyama proposed a suction air flow storage drying system. Learning control method was applied to this system. To save the experimental time, computer simulation was also used. By computer simulation, the best control sequence was obtained and real control was carried out by controlling the equilibrium moisture content of drying air and accuracies of controlling moisture content was within 0.5%,w.b..

为了从不可靠的概率控制元件控制谷物干燥机生产高质量的谷物，提出了一种“学习方法”。学习方法是从学习寻找最佳控制序列开始，在最佳控制路径上跟踪真实的控制，为了提高控制精度，需要改进干燥前和干燥过程中谷物品质的检测技术。采用叶轮式砻谷机对高水分稻谷进行脱壳处理，用外观品质测定仪对脱壳后的稻谷（糙米）进行外观品质检测，用近红外光谱仪对稻谷（糙米）进行内部品质检测。这种方式的可用性得到了保证。该方法被一家公司用于制造商业测试仪。对叶轮式脱壳机的动态特性进行了研究，发现了脱壳风机转速的比例规律。作为一种低成本生产高质量谷物的干燥方法，西山提出了吸风气流储存干燥系统。将学习控制方法应用于该系统。为了节省实验时间，还使用了计算机模拟。通过计算机仿真，得到了最佳控制序列，并通过控制干燥空气的平衡含水率实现了真实的控制，含水率控制精度在0. 5% w. b.以内。