【正文】 業(yè)的可持續(xù)發(fā)展，大大提高農(nóng)業(yè)勞動(dòng)生產(chǎn)率、資源利用率和農(nóng)業(yè)產(chǎn)品商品化率，也使現(xiàn)代生產(chǎn)技術(shù)由于有現(xiàn)代裝備和工程技術(shù)手段的支持而得到實(shí)施和進(jìn)一步發(fā)展。 研究背景和意義 研究背景 農(nóng)業(yè)機(jī)械化是現(xiàn)代農(nóng)業(yè)的重要物質(zhì)技術(shù)基礎(chǔ)，是農(nóng)業(yè)現(xiàn)代化的重要內(nèi)容和標(biāo)志。將農(nóng)業(yè)機(jī)械裝備技術(shù)融合現(xiàn)代液壓技術(shù)、傳感器技術(shù)、電子技術(shù)和單片機(jī)控制技術(shù)，可極大地提高液壓懸掛系統(tǒng)操作的舒適性和簡捷性，準(zhǔn)確、快速地使用和調(diào)節(jié)液壓懸掛系統(tǒng)，可提高生產(chǎn)率和作業(yè)質(zhì)量。機(jī)械控制的液壓懸掛系統(tǒng)采用桿件和彈性元件，結(jié)構(gòu)比較復(fù)雜，彈性元件的遲滯、機(jī)械摩擦和桿件的脹縮會(huì)影響調(diào)節(jié)性能。 Automatic control 畢業(yè) 設(shè)計(jì)說明書論文 1961660126 課件之家的資料精心整理好資料 第一章 緒論 引言 現(xiàn)有的多數(shù)農(nóng)用拖拉機(jī)使用液壓懸掛系統(tǒng)，拖拉機(jī)液壓懸掛系統(tǒng)可分為 3 種形式 ：分置式液壓系統(tǒng) 、 半分置式液壓系統(tǒng) 、 整體式液壓系統(tǒng) 。 Hydraulic hitch system。在軟件方面，完成了主程序控制程序總體流向。在液壓油路方面，該系統(tǒng)用電磁換向閥控制分配器取代傳統(tǒng)機(jī)械式的控制分配器，并設(shè)計(jì)配套油路；在控制反饋信號(hào)獲取方面，系統(tǒng)中安裝位移傳感器、壓力傳感器和角位移傳感器；同時(shí)，對(duì)拖拉機(jī)電子液壓懸掛的各種耕深控制方法進(jìn)行比較分析。在原拖拉機(jī)半分置式液壓懸掛機(jī)構(gòu)中改進(jìn)設(shè)計(jì)了自動(dòng)控制系統(tǒng)。 本文首先介紹了傳統(tǒng)拖拉機(jī)液壓懸掛系統(tǒng)的組成和類型。畢業(yè) 設(shè)計(jì)說明書論文 1961660126 課件之家的資料精心整理好資料 目 錄 1 緒 論 ......................................................................... 1 ..................................................................... 1 ............................................................ 1 ............................................................ 1 ............................................................ 1 ........................................................ 3 ........................................................ 3 ........................................................ 4 ................................................................. 5 ................................................................. 7 2 拖拉機(jī)電控液壓懸掛系統(tǒng)設(shè)計(jì) ................................................. 8 .................................................. 8 .................................................... 8 ........................................................ 9 電控液壓懸掛系統(tǒng)設(shè)計(jì) .................................................... 10 ..................................................... 10 計(jì)方案的確定 ..................................................... 14 工作機(jī)理 ................................................................ 14 本章小結(jié) ................................................................ 15 3 液壓回路設(shè)計(jì)和信號(hào)處理電路設(shè)計(jì) ............................................ 16 ................................................... 16 ............................................... 16 ............................................... 17 ....................................................... 17 ....................................................... 18 ............................................... 18 ......................................................... 19 ....................................................... 19 ................................... 22 ..................................... 23 ............................................................ 23 ECU特點(diǎn) ........................................................... 23 80C196KC系統(tǒng)設(shè)計(jì) .................................................. 24 ................................................................ 25 4 電控液壓懸掛系統(tǒng)軟件設(shè)計(jì) ................................................... 27 .............................................................. 27 A/D轉(zhuǎn)換中斷程序設(shè)計(jì) ..................................................... 27 ................................................................ 29 結(jié) 論及展望 .................................................................... 30 參考文獻(xiàn) ....................................................................... 31 畢業(yè) 設(shè)計(jì)說明書論文 1961660126 課件之家的資料精心整理好資料 附錄 1 ......................................................................... 33 附錄 2 ......................................................................... 34 附錄 3 ......................................................................... 38 致 謝 ......................................................................... 41 拖拉機(jī)液壓懸掛系統(tǒng)自動(dòng)控制研究 摘 要 隨著新興科學(xué)技術(shù)的不 斷創(chuàng)新，尤其是計(jì)算機(jī)技術(shù)、電子控制、人工智能、網(wǎng)絡(luò)通訊等高新技術(shù)的迅速發(fā)展，對(duì)拖拉機(jī)工業(yè)的發(fā)展產(chǎn)生了很大的影響和滲透。而采用機(jī) — 電 — 液一體化控制技術(shù)是拓寬拖拉機(jī)功能、提高其技術(shù)性能以及解決其所面臨諸多技術(shù)難題的最佳選擇方案，并且已經(jīng)成為現(xiàn)代拖拉機(jī)及其配套機(jī)組的主要技術(shù)發(fā)展趨勢(shì)。在此基礎(chǔ)上，選擇了拖拉機(jī)半分置式液壓懸系統(tǒng)進(jìn)行設(shè)計(jì)，設(shè)計(jì)新型拖拉機(jī)電控液壓懸掛系統(tǒng)。分別闡述了自動(dòng)控制系統(tǒng)的組成、工作 原理、土壤阻力傳感器、農(nóng)具提升高度傳感器、主控制閥位移傳感器信號(hào)的測(cè)取與處理以及單片機(jī)控制的實(shí)現(xiàn)。 拖拉機(jī)電控液壓懸掛控制單元設(shè)計(jì)包括硬件和軟件設(shè)計(jì) .根據(jù)本系統(tǒng)各功能模塊的具體需求，選用 Intel 公司 MSC96系列的 80C196KC單片機(jī)設(shè)計(jì)控制器。 關(guān)鍵詞： 拖拉機(jī)；液壓懸掛系統(tǒng)；換向閥；自動(dòng)控制 畢業(yè) 設(shè)計(jì)說明書論文 1961660126 課件之家的資料精心整理好資料 Study on Automatic Control for Hydraulic Hitch Equipment of Tractor Abstract With the perpetual innovation of the emerging technology, especially the rapid development of high and new technology, such as puter technology, electronic control, artificial intelligence and work munications, the tractor industry is influenced greatly. Taking the integrated control technology of hydromechatronics is the best project for broadening tractor function, improving its technical performance and solving numerous facing technical difficulties and it has bee the major technology trend of modern tractors and the supporting units. This paper first introduces the position and type of the traditional tractor hitch control system. Based on this, choosing the structure of semipartition hydraulic hitch system to carry on the design and designing a new electrohydraulic hitch system. A simple structure of semipartition hydraulic hitch equipment and constituting of automatic control system was provided. The signal of soil resistance sensor and the implement lift height sensor and the controlvalve sensor were measured and managed. The system was under the control of the SCM. The traditional mechanical splitter is replaced by proportional solenoid valve and its supporting circuit. A displacement sensor, a force sensor and an angle sensor is used for gaining feedback control signal. Furthermore, The various deepconditioning method of cultivation of tractor electrohydraulic hitch are pared and analyzed in this paper.