本文選題：數(shù)學模型 + 油缸�。� 參考：《浙江理工大學》2017年碩士論文

【摘要】：隨著農村的改革和集約化生產,田塊的面積變大,種植機械的作業(yè)幅寬也在增大。大型農機進入了農業(yè)生產,傳統(tǒng)的小型拖拉機旋耕機組由于整地后土地不夠平整,已經不能適應寬幅作業(yè)的播種機和插秧機作業(yè)。為此,本文開展了拖拉機旋耕機組水平自動控制系統(tǒng)的研究,針對目前該控制系統(tǒng)對田塊的適應性較差等問題,從硬件和軟件兩方面,對拖拉機旋耕機組液壓水平自動控制系統(tǒng)進行了設計,主要研究內容和成果如下:(1)在研究國內外液壓水平自動控制系統(tǒng)技術發(fā)展的基礎上,結合目前我國拖拉機旋耕機組的工作特點,研究了拖拉機旋耕機組液壓水平自動控制系的基本原理,提出了本課題的研究內容;(2)結合拖拉機三點懸掛機構的工作特點,對雙油缸和單油缸水平自動控制方案進行了分析,設計了一種新型油缸活塞桿位置傳感器,對液壓系統(tǒng)的油路進行了設計;(3)從提高拖拉機旋耕機組液壓水平自動控制系的可靠性和適應性兩個方面,設計了水平自動控制裝置的電氣控制系統(tǒng),優(yōu)選了傳感器等電氣元件;根據設計的控制原理,完成了PCB板的制作和線路板的焊接,以及控制器的制作工作。(4)研究了水平自動控制系統(tǒng)各模塊的工作原理,建立了水平自動控制系統(tǒng)的數(shù)學模型;提出了采用模糊PID控制算法來實現(xiàn)自動調平,并在MATLAB中搭建仿真模型進行理論分析。(5)研發(fā)了室內模擬實驗臺,進行了系統(tǒng)的水平控制實驗,證明系統(tǒng)的可行性;田間試驗證明,本文研發(fā)的基于模糊PID的拖拉機旋耕機組液壓水平自動控制系統(tǒng)對田塊的適應性好,可靠性得到提高。
[Abstract]:With the reform and intensive production in the countryside, the area of field becomes larger and the working width of planting machine increases. Large-scale agricultural machinery has entered into agricultural production, the traditional small tractor rotary tiller group has been unable to adapt to the planter and transplanter operation because the land is not smooth enough after land preparation. Therefore, this paper has carried out the research on the level automatic control system of tractor rotary tiller group. Aiming at the problems of poor adaptability of the control system to the field block at present, the hardware and software are two aspects. The hydraulic level automatic control system of tractor rotary tiller group is designed. The main research contents and results are as follows: 1) on the basis of studying the technology development of hydraulic level automatic control system at home and abroad, According to the working characteristics of tractor rotary tiller group in China, the basic principle of hydraulic horizontal automatic control system of tractor rotary tiller group is studied, and the research content of this subject is put forward, which combines with the working characteristics of tractor three-point suspension mechanism. The horizontal automatic control scheme of double oil cylinder and single oil cylinder is analyzed, and a new type of piston rod position sensor for oil cylinder is designed. In order to improve the reliability and adaptability of the hydraulic horizontal automatic control system of tractor rotary tiller group, the electrical control system of the horizontal automatic control device is designed, and the electrical components such as sensors are selected. According to the control principle of the design, the manufacture of the PCB board and the welding of the circuit board, as well as the manufacture of the controller are completed. The working principle of each module of the horizontal automatic control system is studied, and the mathematical model of the horizontal automatic control system is established. The fuzzy PID control algorithm is used to realize automatic leveling, and the simulation model is built in MATLAB for theoretical analysis. The indoor simulation experiment bench is developed, and the system horizontal control experiment is carried out to prove the feasibility of the system, and the field experiment proves that the system is feasible. The hydraulic level automatic control system of tractor rotary tiller group based on fuzzy PID developed in this paper has good adaptability to field block and its reliability has been improved.
【學位授予單位】：浙江理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：S222.3;TP273

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