致密成型中液压控制系统的建模与仿真研究

发布时间：2018-05-21 08:25

本文选题：致密成型 + 液压控制系统　；参考：《内蒙古农业大学》2012年硕士论文

【摘要】：致密成型技术是将生物质燃料包括木屑下脚料、农作物秸秆、谷壳等农林废弃物作为原材料,经一定的工艺加工步骤压缩成固体状,制成颗粒状或者棒状,致密成型后的燃料是一种可直接燃烧新型环保卫生的能源资源。本文所研究的内容是围绕生物质燃料在致密成型中,通过在压缩过程的试验基础上,对HS45-I试验装置的液压控制系统和致密成型的燃料进行分析后,进行建模试验仿真研究。由于传统的数学建模方法比较复杂,所以本文利用面向工程设计的高级建模软AMESim对生物质燃料致密成型系统进行建模。其中在软件AMESim中,建立液压系统模型、生物质燃料的应力松弛规律模型。利用液压系统模型,对生物质燃料模型在致密成型室方向上的应力松弛规律进行仿真,获得了生物质燃料致密成型过程的仿真曲线,同时利用仿真软件Matlab/Simulin系统,建立起了致密成型中液压控制系统的控制模型。采用模糊PID控制策略,对致密成型装置的液压控制系统进行建模和控制,再利用联合仿真接口技术,实现了液压控制系统的联合仿真。模糊PID控制系统有响应速度快、上升时间短、无滞后、超调小、抗扰动性强等优点,这些优点使得模糊PID控制器的控制效果良好,故能满足生物质燃料致密成型液压控制系统的控制性能要求。本文所研究的结果可为致密成型装置的性能相关试验研究提供一定依据。进而为致密成型装置的改进以及生物质燃料块的生产起到指导作用,并从模型中获得合适的致密成型装置液压系统性能参数,分析提高生产效率的方法。
[Abstract]:Densification molding technology uses biomass fuel, including wood scraps, crop stalks, grain husks and other agricultural and forestry wastes as raw materials, and compacts them into solids through certain processing steps to make them into granular or rod shape. Compacted fuel is a kind of energy resource which can burn new environmental protection and sanitation directly. The content of this paper is to analyze the hydraulic control system and compact fuel of the HS45-I test device on the basis of the experimental results of the compression process around the dense molding of biomass fuel, and then carry out the modeling, experimental and simulation research. Because the traditional mathematical modeling method is complex, this paper uses the advanced modeling soft AMESim for engineering design to model the biomass fuel compact molding system. In the software AMESim, the hydraulic system model and the stress relaxation model of biomass fuel are established. Using hydraulic system model, the stress relaxation law of biomass fuel model in the direction of compact molding chamber is simulated, and the simulation curve of biomass fuel densification molding process is obtained. At the same time, the simulation software Matlab/Simulin system is used. The control model of hydraulic control system in dense molding is established. The fuzzy PID control strategy is used to model and control the hydraulic control system of the compact forming device. The joint simulation of the hydraulic control system is realized by using the joint simulation interface technology. The fuzzy PID control system has the advantages of fast response speed, short rise time, no lag, small overshoot, strong anti-disturbance and so on. These advantages make the fuzzy PID controller have good control effect. Therefore, it can meet the control performance requirements of biomass fuel dense molding hydraulic control system. The results obtained in this paper can provide a basis for the experimental study on the properties of compact forming device. Then it can guide the improvement of compact molding device and the production of biomass fuel block, and obtain suitable performance parameters of hydraulic system of compact molding device from the model, and analyze the method of improving production efficiency.
【学位授予单位】：内蒙古农业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TK6;TH137.9;TP273

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