非接触式活塞环梯形角测量系统的设计与验证

活塞环梯形角是评价活塞环加工质量的关键参数，随着技术与工艺的进步，传统的接触式梯形角测量方案已不能满足现代的生产需求。分析接触式梯形角测量方案存在的问题，提出了基于光谱共焦位移传感器的非接触梯形角测量方案，并从传感器的选型、组合测量头的设计和夹紧机构的设计3个方面展现了全新的测量系统设计方案。通过对测量系统进行误差分析和可行性验证，证明了新的设计方案具有可行性，为研制新型非接触式活塞环梯形角测量仪提供了全新、有效的思路。

Design and Verification of Non-Contact Piston Ring Trapezoidal Angle Measurement System

A metal thin-shell structure deformation repair method based on stress control is studied.By applying this method,the deformation fault of the metal structure of the aircraft integral fuel tank has been successfully repaired.Based on the theoretical study of energy principle,the method studies the internal structural stress control in the deformation repair,and applies the reverse stress to the deformed area,so that the deformed thin-shell structure of the integral fuel tank can be restored to its original shape,thereby achieving the purpose of repairing the deformation.As a typical metal thin-shell structure,the integral fuel tank also needs to ensure the unique functional characteristics of aircraft,such as aerodynamics and stealth.Therefore,the deformation repair process requires the coordination and balance of multiple structural systems and the comprehensive optimization in multiple fields.The deformation repair method of metal thin-shell structure based on stress control is studied in the practical process of repairing the typical metal thin-shell structure deformation failure of the aircraft integral fuel tank.The deformation repair of whole fuel tank metal thin-shell structure is realized.The research on the deformation repair of metal thin-shell structures has important guiding significance and provides new ideas for the deformation repair in related fields.