ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

Precision optical mechanical systems are the core component in maneuver detection on land, air and sea as well as in the guidance equipment. The precision assembly of its sensitive axes, such as optical axis, inertial navigation axis and mechanical axis, is one of the key factors affecting the final performance. In order to improve the assembly efficiency and assembly performance, the precision assembly problem of multi-sensitive axes was transformed into the problem of angle variation in the process of cabin assembly by taking a certain type of equipment as a research object and analyzing its assembly characteristics of multi-sensitive axes. The definition and process were introduced detailly, and based on those, the accumulation model of angle variation was established and the relation between machining error and distribution of angle variation was derived, which can be used to analyze the assembly accuracy in the process of assembling the multi-sensitive axes. Finally, based on the established model, the direct docking method, which was mostly used in the assembly of cabin nowadays, was simulated and analyzed, and the simulation results revealed the reason of the one-time qualified rate was very low in the assembly of the certain object. It was that the assembly direction of the cabin was completely random and there was no optimization in the assembly process. Inspired by this, a kind of process optimization assembly method by adjusting the matching direction was proposed, and the precision assembly process of multi-sensitive axes was optimized. The simulation results show that comparing with the direct docking method, the proposed method can effectively ensure the assembly accuracy between the sensitive axes.