本文選題：誤差分析　切入點(diǎn)：測(cè)量系統(tǒng)　出處：《桂林電子科技大學(xué)》2015年碩士論文

【摘要】：基于虛擬切片的三維無(wú)損測(cè)量裝置由測(cè)量系統(tǒng)和控制系統(tǒng)組成。其中測(cè)量系統(tǒng)主要由精密進(jìn)給機(jī)構(gòu)、測(cè)力機(jī)構(gòu)、配重調(diào)平機(jī)構(gòu)和定位裝夾機(jī)構(gòu)組成,控制系統(tǒng)由上位機(jī)和下位機(jī)部分組成。我們把整個(gè)系統(tǒng)的誤差分為測(cè)量系統(tǒng)誤差和控制系統(tǒng)誤差,并對(duì)整個(gè)系統(tǒng)的誤差進(jìn)行了分析和研究,為提高和改進(jìn)系統(tǒng)精度提供了重要的依據(jù)。本論文以基于虛擬切片的三維無(wú)損測(cè)量裝置產(chǎn)生的誤差為主線,從測(cè)量系統(tǒng)誤差和控制系統(tǒng)誤差兩個(gè)方面,對(duì)整個(gè)系統(tǒng)的誤差進(jìn)行了分析與研究。首先,研究了測(cè)量系統(tǒng)的誤差組成,通過實(shí)驗(yàn)和理論詳細(xì)分析了精密進(jìn)給機(jī)構(gòu)、測(cè)力機(jī)構(gòu)、配重調(diào)平機(jī)構(gòu)、定位裝夾機(jī)構(gòu)的誤差,得出了測(cè)量誤差主要由五個(gè)方面引起:精密進(jìn)給機(jī)構(gòu)的定位誤差、測(cè)力儀器自身誤差、測(cè)力結(jié)構(gòu)的誤差、支點(diǎn)與承載面間摩擦引起的誤差、溫度引起導(dǎo)軌梁兩端臂長(zhǎng)變化引起的誤差;研究了控制系統(tǒng)的誤差組成,分析了下位機(jī)的誤差,得出了其誤差主要來(lái)源于PLC控制器引入的誤差和控制系統(tǒng)機(jī)械部分摩擦引起的誤差;分析了上位機(jī)的誤差,得出了其誤差主要來(lái)源于定時(shí)器Timer控件的定時(shí)誤差和測(cè)量控制軟件的機(jī)械性帶來(lái)的誤差。其次,基于誤差合成理論,對(duì)測(cè)量系統(tǒng)的誤差進(jìn)行合成,得出了測(cè)量系統(tǒng)的測(cè)量誤差為0.014554g;同時(shí)對(duì)控制系統(tǒng)的誤差進(jìn)行合成,得出了控制系統(tǒng)的定位誤差為0.006747mm;通過實(shí)驗(yàn)分析,得出本文對(duì)系統(tǒng)誤差的分析是合理的。最后,通過實(shí)驗(yàn)分析了實(shí)驗(yàn)裝置的精度,得出了測(cè)量系統(tǒng)和控制系統(tǒng)的誤差范圍;基于對(duì)測(cè)量系統(tǒng)各組成部分的誤差分析結(jié)果,提出了提高測(cè)量系統(tǒng)各組成部分精度的措施;基于對(duì)控制系統(tǒng)誤差的分析結(jié)果,提出了控制系統(tǒng)誤差的補(bǔ)償方法。
[Abstract]:The 3D nondestructive measurement device based on virtual slice is composed of measurement system and control system. The measuring system is mainly composed of precision feed mechanism, force measuring mechanism, weight leveling mechanism and positioning clamping mechanism. The control system is composed of upper computer and lower computer. The error of the whole system is divided into measurement system error and control system error, and the error of the whole system is analyzed and studied. It provides an important basis for improving and improving the accuracy of the system. In this paper, the error caused by the 3D nondestructive measuring device based on virtual slice is taken as the main line, and the error of the measurement system and the control system are two aspects: the error of the measurement system and the error of the control system. The error of the whole system is analyzed and studied. Firstly, the error composition of the measurement system is studied, and the errors of precision feed mechanism, force measuring mechanism, weight leveling mechanism and positioning clamping mechanism are analyzed in detail through experiments and theories. It is concluded that the measurement error is mainly caused by five aspects: the positioning error of the precision feed mechanism, the error of the force measuring instrument itself, the error of the force measuring structure, the error caused by friction between the fulcrum and the bearing surface, and the error caused by the friction between the bearing surface and the bearing surface. The error caused by the change of arm length at both ends of the guideway beam caused by temperature, the error composition of the control system and the error of the lower computer are studied. It is concluded that the error mainly comes from the error introduced by the PLC controller and the error caused by the friction of the mechanical part of the control system, and the error of the upper computer is analyzed. It is concluded that the error mainly comes from the timing error of the timer Timer control and the error caused by the measurement control software. Secondly, based on the theory of error synthesis, the error of the measurement system is synthesized. The measurement error of the measurement system is 0.014554g, and the error of the control system is synthesized, and the positioning error of the control system is 0.006747mm. through the experimental analysis, it is concluded that the analysis of the system error in this paper is reasonable. The error range of the measurement system and the control system is obtained through the experimental analysis of the accuracy of the experimental device, and based on the error analysis results of the various components of the measurement system, the measures to improve the accuracy of each component of the measurement system are put forward. Based on the analysis of the error of the control system, a compensation method for the error of the control system is proposed.
【學(xué)位授予單位】：桂林電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TH878

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本文編號(hào)：1661516