【摘要】：隨著現(xiàn)代科技的發(fā)展,機械不斷地向高速、輕質(zhì)、重載,高精度方向發(fā)展。機構(gòu)運動精度已成為影響機械產(chǎn)品質(zhì)量的重要因素。通常影響機構(gòu)運動精度的因素有構(gòu)件幾何公差、運動副間隙、構(gòu)件的受力受熱變形、構(gòu)件的材料和機構(gòu)運動輸入波動等。本文以平面連桿為研究對象,對考慮尺寸公差、運動副間隙和結(jié)構(gòu)誤差的平面四桿機構(gòu)進行了機構(gòu)運動精度可靠性分析。本文給出了機構(gòu)運動精度的一般理論,同時采用環(huán)路矢量微分法建立了含間隙平面連桿機構(gòu)運動精度模型�；谇懊鏅C構(gòu)運動精度模型采用一次二階矩法對機構(gòu)運動精度可靠性進行了瞬時及時變可靠性分析。為了檢驗本文所采用解析法的正確性,本文給出了蒙特卡洛方法結(jié)果進行對照。然后對考慮結(jié)構(gòu)誤差的平面連桿機構(gòu)的機構(gòu)運動精度可靠性處理,本文提出等效誤差模型的方法將其轉(zhuǎn)換為不含結(jié)構(gòu)誤差的機構(gòu)進行求解,該方法揭示了結(jié)構(gòu)誤差對機構(gòu)運動精度可靠性的作用機理。將解析法與蒙特卡洛方法結(jié)果對比,驗證了本文所采用的隨機模型、機構(gòu)運動精度模型和機構(gòu)運動精度可靠性理論是合理有效的。
[Abstract]:With the development of modern science and technology, machinery continues to develop in the direction of high speed, light weight, heavy load and high precision. Mechanism motion accuracy has become an important factor affecting the quality of mechanical products. Generally, the factors that affect the kinematic accuracy of the mechanism include the geometric tolerance of the component, the clearance of the moving pair, the thermal deformation of the component under force, the fluctuation of the material and the motion input of the mechanism and so on. In this paper, the reliability analysis of kinematic accuracy of planar four-bar mechanism considering dimensional tolerance, clearance of kinematic pair and structural error is carried out with planar connecting rod as the research object. In this paper, the general theory of the kinematic accuracy of the mechanism is given, and the kinematic accuracy model of the planar linkage with clearance is established by using the loop vector differential method. Based on the motion accuracy model of the front mechanism, the reliability of the kinematic accuracy of the mechanism is analyzed by means of the first order second moment method, and the instantaneous and time varying reliability analysis is carried out. In order to verify the correctness of the analytical method used in this paper, the results of Monte Carlo method are compared. Then, to deal with the reliability of the kinematic accuracy of the planar linkage mechanism considering the structural error, the equivalent error model is proposed in this paper, which can be transformed into a mechanism without structural error to solve the problem. This method reveals the mechanism of the effect of structural error on the reliability of the kinematic accuracy of the mechanism. The results of the analytical method and Monte Carlo method are compared to verify that the stochastic model, the kinematic accuracy model of the mechanism and the reliability theory of the kinematic accuracy of the mechanism are reasonable and effective.
【學位授予單位】：西華大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TH112

【參考文獻】

相關(guān)期刊論文 前10條

1 紀玉杰;孫志禮;李良巧;;曲柄滑塊機構(gòu)運動可靠性的仿真[J];兵工學報;2006年01期

2 趙榮第;;具有桿長誤差和運動副間隙的平面低副機構(gòu)的運動分析[J];北京農(nóng)業(yè)工程大學學報;1993年02期

3 徐衛(wèi)良;張啟先;;空間機構(gòu)運動誤差的概率分析和蒙特卡羅模擬[J];南京工學院學報;1988年06期

4 拓耀飛;陳建軍;張馳江;陳永琴;;彈性曲柄滑塊機構(gòu)的運動精度可靠性分析[J];機械設(shè)計與研究;2006年01期

5 張建國,白廣臣;機構(gòu)運動功能可靠性分析方法[J];機械工程師;1999年11期

6 陳建軍,陳勇,崔明濤,高偉,趙竹青;基于運動精度可靠性的平面四桿機構(gòu)優(yōu)化設(shè)計[J];機械科學與技術(shù);2002年06期

7 羅繼曼,孫志禮;對曲柄滑塊機構(gòu)運動精度可靠性模型的研究[J];機械科學與技術(shù);2002年06期

8 史天錄，，鄧洪洲，馮元生;RCCC空間機構(gòu)的運動精度和可靠性分析[J];機械科學與技術(shù);1995年01期

9 師忠秀,王鋒;機構(gòu)運動精度可靠性分析方法的研究[J];機械科學與技術(shù);1997年01期

10 黃瑋;馮蘊雯;呂震宙;馮元生;;考慮鉸鏈運動副間隙的機構(gòu)運動可靠性分析模型[J];機械強度;2007年02期

本文編號：2470933