棉花加工智能化关键技术研究
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摘要
棉花是关系到国际民生的重要战略物资,棉花加工同样也与人们的日常生活有着密切的联系,是国民经济的重要组成部分。尽管我国的棉花加工业有着很长的历史,加工技术在近些年有了很大的改进和提高,但与国外先进的棉花加工技术相比仍然存在一定的差距。棉花加工技术的落后,将直接导致我国的棉产品在激烈的国际竞争中处于劣势地位。因此,改进和发展我国棉花加工工业具有重要的意义。
     为保证棉花加工的高效、优质、低耗,针对不同性状的棉花加工,必须对相应的棉花加工工艺、成套设备运行参数等做出适应性调整,以实现棉花加工的精细化、智能化。本文通过对比分析国内外棉花加工业发展现状,找出了国内棉花加工行业存在的问题和不足,提出了实现棉花精细、智能化加工的总体方案。并对棉花加工相关的关键技术进行了详细分析和研究。
     棉花加工不同于其它,较为复杂,影响因素很多,加工控制系统属于非线性、多变量耦合系统,因此无法建立系统精确的数学模型,采用传统的控制理论和控制方法很难实现有效的控制。本研究将模糊控制技术引入到棉花加工过程,采用模糊推理的方法实现了棉花加工过程的智能自适应控制,完成了籽棉烘干模糊推理系统、籽棉轧花模糊推理系统和皮棉加湿模糊推理系统的设计,并进行了系统有效性仿真,试验结果表明,设计的模糊推理系统是有效可行的。
     本课题还针对传统籽棉清理机的缺陷,设计了刺钉滚筒与格条栅之间的距离进行实时调节的智能型数控籽棉清理机,改善籽棉清理机加工中易出现堵棉等情况,根据实际的生产情况,自动调节间距,提高棉花加工效率,从而提高皮棉质量。
Cotton is an important strategic resource related to the national economic and the livelihood of people. The cotton processing is also an important component of national economy, has a close relationship with daily life of people. Although the cotton processing industry of our country has a long history and the processing technology has improved and enhanced a lot in recent years, it still existes a big gap compared with the overseas advanced cotton processing technology. The lag of processing technology results in the cotton product of our country being at a disadvantage in the fierce international competition. So it is very significant to improve and develop the cotton processing industry of our country.
     To ensure the high efficient, high quality and low consumption of cotton processing, according to different characters of cotton processing, it must make adaptability adjustment for corresponding cotton processing process and operation parameters of complete equipment in order to realize the refinement and intelligence of cotton processing. Through the comparative analysis of current situation of cotton processing industry at home and abroad, and find out the shortage and problem of domestic cotton processing industry, then puts forward the total project of the refinement and intelligent processing. Then it analysises and studies on the related key technologies of cotton processing.
     The cotton processing influenced by many factors, is different from other product processing, which belongs to nonlinear and multivariable coupling system. The accurate mathematical model of the system is incapable to establish, so it is difficult to achieve the effective control with traditional control theory and method. The fuzzy logic control technology is introduced in the cotton processing. The fuzzy reasoning is adopted to achieve the intelligent and adaptive control in the cotton processing with fuzzy inference method. Then the seed cotton drying fuzzy reasoning system、the seed cotton ginning fuzzy reasoning system and the lint wetting fuzzy reasoning system were designed, and the validity simulations of the three systems were done, the result of the tests indicates that the design of the three systems is efficient and effective.
     Recording to the defects of traditional cleaning machine, it designs the intelligent CNC seed cotton processing machine whose distance between barbed nail roller and grid can be real-time adjusted. And it improves cotton blocking during processing and so on. And according to the real production, it can automatically adjust the distance; improve the efficiency of cotton processing and the quality of lint.
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