本文選題：主動(dòng)測(cè)量 + 灰色系統(tǒng)��； 參考：《鄭州大學(xué)》2017年碩士論文

【摘要】：磨加工是保證機(jī)加工精度的重要工序,磨削質(zhì)量的高低直接決定著工件的性能。主動(dòng)測(cè)量技術(shù)可以在機(jī)加工過(guò)程中實(shí)時(shí)監(jiān)測(cè)工件的尺寸信息并對(duì)加工進(jìn)程實(shí)施反饋控制,可提高加工精度和降低生產(chǎn)成本。目前,我國(guó)在主動(dòng)測(cè)量領(lǐng)域與國(guó)外存在著較大的技術(shù)差距,控制器還大多停留在微機(jī)化水平,功能十分單一、測(cè)量精度不高。隨著電子技術(shù)的進(jìn)步,微處理器和嵌入式操作系統(tǒng)為高性能主動(dòng)測(cè)量?jī)x控制器的研制提供了軟硬件基礎(chǔ)。本文在研究主動(dòng)測(cè)量控制器功能需求的基礎(chǔ)上,開(kāi)發(fā)了以A8微處理器、嵌入式WinCE系統(tǒng)為平臺(tái)的多功能主動(dòng)測(cè)量控制器,深入研究了其工藝參數(shù)設(shè)定、斷續(xù)表面測(cè)量和在線圓度評(píng)定等相關(guān)功能的關(guān)鍵技術(shù),完成的主要工作有:(1)論文在分析多功能磨加工主動(dòng)測(cè)量控制器的功能需求基礎(chǔ)上,完成了以A8微處理器、嵌入式WinCE系統(tǒng)為平臺(tái)的多功能主動(dòng)測(cè)量控制器的軟、硬件總體方案分析與設(shè)計(jì);并根據(jù)軟件系統(tǒng)對(duì)數(shù)據(jù)實(shí)時(shí)性響應(yīng)的高速數(shù)據(jù)操作需求,給出了軟件系統(tǒng)的數(shù)據(jù)管理策略及方案設(shè)計(jì)。(2)論文運(yùn)用灰色系統(tǒng)理論,分析不同工藝參數(shù)對(duì)加工質(zhì)量評(píng)價(jià)指標(biāo)的影響;并結(jié)合數(shù)據(jù)庫(kù)歷史加工數(shù)據(jù),通過(guò)加權(quán)灰靶決策分析得出數(shù)據(jù)庫(kù)中歷史最優(yōu)工藝參數(shù)組合,進(jìn)而實(shí)現(xiàn)控制器工藝參數(shù)的自主設(shè)定。(3)分析實(shí)際工況下的斷續(xù)表面測(cè)量采樣值變化情況的形成原因,結(jié)合相鄰采樣點(diǎn)值在鍵槽內(nèi)的變化情況,提出設(shè)定內(nèi)部同期模式中觸發(fā)周期的方法。(4)論文在考慮磨削加工過(guò)程中砂輪進(jìn)給對(duì)工件輪廓成形的影響,提出對(duì)加工過(guò)程中尺寸補(bǔ)償?shù)脑诰�圓度評(píng)定方法。同時(shí),對(duì)比分析了在線圓度評(píng)定與機(jī)后圓度評(píng)定兩種理論方法的聯(lián)系與區(qū)別。(5)在實(shí)驗(yàn)室現(xiàn)有硬件平臺(tái)和軟件支持的條件下,利用主要由半自動(dòng)高精密數(shù)控磨床、所開(kāi)發(fā)的開(kāi)發(fā)基于A8微處理器的多功能主動(dòng)測(cè)量控制器樣機(jī)、傳感器、粗糙度儀和圓度儀等組成的實(shí)驗(yàn)系統(tǒng),對(duì)上述關(guān)鍵技術(shù)分別做了試驗(yàn)分析或?qū)嶒?yàn)驗(yàn)證,結(jié)果證明了技術(shù)原理的合理性和可行性。論文對(duì)多功能磨加工主動(dòng)量?jī)x控制器關(guān)鍵技術(shù)的研究為現(xiàn)有系列控制器的升級(jí)換代提供了技術(shù)理論支持,對(duì)于提升主動(dòng)量?jī)x控制器智能化水平、拓展應(yīng)用范圍具有重要意義。
[Abstract]:Grinding is an important process to ensure machining accuracy. The quality of grinding directly determines the performance of workpieces. The active measurement technology can monitor the dimension information of the workpiece in real time and control the machining process in real time. It can improve the machining precision and reduce the production cost. At present, there is a big technical gap between our country and foreign countries in the field of active measurement. Most of the controllers remain at the level of microcomputer, the function is very single, and the measurement accuracy is not high. With the development of electronic technology, the microprocessor and embedded operating system provide the hardware and software foundation for the development of the controller of high performance active measuring instrument. Based on the research of the functional requirements of the active measurement controller, a multi-function active measurement controller based on A8 microprocessor and embedded WinCE system is developed in this paper. On the basis of analyzing the functional requirements of the active measuring controller for multifunctional grinding processing, the A8 microprocessor has been completed, and the main work of this paper is the following: (1) on the basis of the analysis of the functional requirements of the active measuring controller for multifunctional grinding and machining, the main work accomplished in this paper is A8 microprocessor. The software and hardware of the multi-function active measurement controller based on embedded WinCE system are analyzed and designed, and according to the high speed data operation demand of the software system, the real-time response of the software system to the data is analyzed and designed. In this paper, the data management strategy and scheme design of the software system are given. (2) using the grey system theory, the paper analyzes the influence of different process parameters on the evaluation index of machining quality, and combines with the historical processing data of database. Through the weighted grey target decision analysis, the historical optimal process parameter combination in the database is obtained, and then the independent setting of the controller process parameters is realized. The reasons for the change of the sampling value of the intermittent surface measurement under the actual working condition are analyzed. According to the change of the value of adjacent sampling points in the keyway, the method of setting the trigger period in the internal synchronization mode is put forward.) in this paper, the influence of grinding wheel feed on the shape of the workpiece profile is considered in the grinding process. An online roundness evaluation method for dimension compensation in machining process is proposed. At the same time, the relationship and difference between on-line roundness evaluation and machine rear roundness evaluation are compared and analyzed. Under the condition of hardware platform and software support in laboratory, semi-automatic high-precision CNC grinder is used. A multi-function active measurement controller prototype, sensor, roughness meter and roundness instrument based on A8 microprocessor is developed. The key technologies mentioned above are analyzed or verified by experiments. The results show that the technical principle is reasonable and feasible. In this paper, the research on the key technology of multi-function grinding active gauge controller provides the technical theoretical support for the upgrading of the existing series of controllers, which is of great significance to enhance the intelligent level of the active gauge controller and expand the application range.
【學(xué)位授予單位】：鄭州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TG596

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本文編號(hào)：1877698