In response to the problem of low first pass rate in the selection of jet disc components for biased jet servo valves,this article first identified the main cause of low first pass rate in the selection of jet disc components through stratified investigation,statistics,and analysis.Subsequently,a causal analysis was conducted using the correlation graph analysis method to identify the main factors affecting the first pass rate of screening.Finally,targeted measures were formulated and implemented to optimize the production process of jet disk components,which achieves the goal of the measures.During the effectiveness inspection,the first pass rate of jet disk component screening was significantly improved.
NASA has released a new version of the safety program requirements and technical handbook,established a new safety system framework.The new safety system clarified the safety responsibilities of the acquirers and the contractors,optimized the guiding principles and methods for the demonstration of safety objectives and requirements,integrated the safety analysis methods,and clarified the relationship among demonstration,program management,product design,and major adjustments have been made to the safety verification methods.It is required to adopt systematic and structured safety verification methods to comprehensively verify the implementation of various safety requirements.At the same time,it also updates the safety procedures at each stage during the life cycle.Great improvement of safety has been made for aerospace products of NASA by the development and implementation of the new safety system.The above aspects are worthy of reference for the domestic aerospace industry to optimize the safety system of the aerospace industry.
According to the Satellite-equipped product characteristics on space,the product assurance practices for Camera Subsystem of a Satellite-equipped are summarized.Quality control is carried out in the four stages of product design,manufacture,experiment,acceptance and delivery,the important product guarantee of technology state change control and product data packet planning on this basis are extracted.The above measures effectively improve the product quality and achieve quantitative management of product assurance,which provides a reference for the follow-up product assurance of Camera Subsystem.
CSS Solar Array,as an application object,and the effective control of the quality of product design,as the goal,Top-Down design of QFD is utilized to transform the customer requirements to function decomposition,hardware decomposition,index decomposition,detailed design of the system,detailed design of the components,and key characteristics of the parts.Also,the optimal engineering solution is explored via an iterative optimization of PDCA.At the same time,the reverse analysis of FMEA is used to identify weak links,such as key features of products,technical risks and single point/immeasurability,strengthen reliable design like margin and redundancy,and it guides the formulation of the whole process quality control measures.Through the method of forward and reverse collaborative design analysis,the engineering optimization of design is realized,the source control of design quality oriented to the product life cycle is realized,and the reliability of products is continuously improved.
In order to effectively implement the regulations on the quality management of equipment and the lifelong accountability system for equipment quality responsibility,and establish a sound quality responsibility system,a complete set of methods has been proposed.These methods which under the construction environment of the New Era Equipment Construction Quality Management System(NQMS)include a quality responsibility system construction model,construction structure,responsibility recognition,responsibility weight distribution,and reward and punishment requirements.The contents of the methods have been practiced and achieved the expected results,and are a useful guideline for the step-by-step implementation of quality responsibility in equipment manufacturing units.
Identification and control of error-prone items is one of the important methods in aerospace products'quality control.In order to further improve the effectiveness and standardization of the identification of error-prone items,this paper carried out a detailed study on the identification and control of error-prone items.Firstly,the definition of error-prone items is clarified,and eight classification suggestions are put forward for error-prone items,including specification,location,direction,sequence,materials,selection,parameters and status.Then,the identification clues of error items are established according to the classification.Based on the development experience and historical cases,the typical identification criteria associated with the identification clues are given.At the same time,the control process is refined,and the concept of error prevention design should be given priority is suggested.The pipeline valve installation in the final assembly stage is selected to carry out the trial application,the typical error-prone project list is established.Practice shows that the contents of this paper can provide some theoretical support for the identification and control of error-prone items.
This paper summarizes the current status of critical processes identification and process control in the aerospace industry,finds out the existing problems from the actual process of manufacturing,and combines the new requirements under the new situation of digital quality management to put forward feasible suggestions for the existing problems,and introduces the management methods in combination with the actual situation of enterprise scientific research and production.It also sorts out the processes and responsibilities in the product planning process,and puts forward the implementation of management requirements such as quality control cards and inspection cards for critical processes in new situations.
In view of the current situation of software project management,the integrated management method is adopted.This paper presents a process management method based on process configurability,analyzes the method in detail,and does some application research according to the actual business.The results show that this method has the ability to adapt to different use environment quickly,and this method has strong practical value.
The paper analyzes the characteristics of the thermal control subsystem of reusable test spacecraft,including multiple design constraints,high technical difficulty,short development cycle,overlapping development and identification of samples,multiple outsourced products of the subsystem,and long control chain.In response to the above characteristics,the main product assurance measures adopted by the project are summarized,such as paying close attention to technical risk identification and control,strict process control and experimental verification,and conducting launch site quality confirmation.The above measures effectively ensured the quality of the thermal control subsystem products of the experimental spacecraft,which provide a reference for subsequent models to carry out related product assurance work.
In order to reduce early failure,apply the specified environmental stress to the product,also to find and eliminate the bad parts,components and process defects in the manufacturing process,environmental stress screening is an important way to achieve product quality and reliability requirements,it also is a process and method.The unified screening method based only on the Environmental Stress Screening Method of Electronic Products has become more and more difficult to fully expose the early defects.According to the characteristics of complex electronic systems,this paper proposes a system-level environmental stress screening method on the basis of Environmental Stress Screening Method for electronic Products,introduces the determination principles of product screening levels,parameters,stresses and other elements,and studies the evaluation method of system screening effect,which has been carried out the exploration and practice of working methods for a complex electronic system.
Facing the situation of high-density research and launch missions of domestic satellites,it is urgent to meet the requirements of high-quality,high-effectiveness and high-efficiency development.This article focuses on the exploration of the working mode of Launch Site Quality Confirmation System(LSQCS)based on structured data platform.Taking the specific practice of a satellite's LSQCS as an example,this paper summarizes the working planning,implementation process and results of the LSQCS,it turns out that combining digital tools with quality control in the process is more efficient and optimized,which promotes the upgrading of scientific research and production of satellite models.
Aerospace production site is an important place in the production process of aerospace products,which directly affects the production quality of aerospace products.In order to improve the site management level,by analyzing the characteristics of aerospace production site and combining the requirements of aerospace refined quality management,the star rating evaluation index system of aerospace production site management is constructed and the star rating evaluation method of aerospace production site management is proposed.The management levels of aerospace production site are quantified and graded.Through the application of the methods in this paper,the in-depth implementation of aerospace refined quality management requirements in the production site has been promoted.The proportion of aerospace production quality problems has decreased from 41.7％before application to 28.3％after comprehensive promotion and application,which reduces the incidence of problems,improves production efficiency,fully enhances the management level of aerospace production site,and provides the support for the construction of digital and intelligent production site.
针对单个产品前期退化过快、无法直接利用前期退化数据有效预测性能退化量的问题,基于Wiener过程,提出了一种融合同类产品数据的性能退化预测方法.首先,构建Wiener过程退化模型并介绍其性质,推导该性能退化模型下的产品寿命分布;然后,基于是否符合整体退化趋势进行数据预处理,截取产品后期的性能退化数据;最后,融合待测产品与同类型产品的性能退化数据,并基于极大似然估计方法开展性能退化预测.此外,通过某型收口螺母应用案例,证明了所提出的融合同类产品数据的性能退化预测方法的有效性.
为充分、有效地利用一切检查测量手段来保证航天发射任务中运载火箭动力系统的质量安全,基于是否可测的质量属性,结合发射场测试发射流程,提出逻辑决断的质量保证方法.经实例分析验证,该质量保证方法对动力系统故障发现率可达79.2％,覆盖率可达100％,可有效提高运载火箭发射场质量保证的有效性.
火星漫游车要成功完成火星科考任务,必须经受低温、辐射、沙尘暴等一系列恶劣环境的考验,以及具备长寿命和强大的计算能力,这些都对元器件的选用提出巨大挑战.因此,系统研究美国火星漫游车用电子元器件的使用环境、选用原则、测试流程等内容,并梳理出美国现已发射的5辆火星车所用的主要类别电子元器件,以期对我国深空探测任务电子元器件的选用提供参考和借鉴.
对某航天研究所的质量管理信息化工作进行了现状分析,通过研究其实施成效,剖析了研究所在质量管理信息化方面存在的不足,并结合问题成因提出了解决方案.为解决质量管理信息系统利用率低、质量控制支撑力不足和综合质量数据展现力弱等问题,重点对研究所的质量管理信息化工作进行了改进,明确了改进的目标、思路和具体措施,制定了全面质量管理信息化的总体方案,给出了业务流程和数据流的整体架构,简述了质量管理信息化构建的主要功能,最后给出了在科研生产模式创新的前提下采取的必要保障措施.
针对航天产品复杂度高、多批次、小批量的特点,运用成功数据包络分析方法,进行产品数据的采集和整理、置信度区间评估及包络范围对比,构建包络分析决策模型,并通过单特性及多特性分析方法在典型产品的应用,定位产品研制过程中的薄弱环节和缺陷,发现和解决系统质量隐患,支撑产品改进,降低损失.
分析了新形势下型号产品研制对质量管理的数字化要求,针对当前航天研制单位在质量信息化建设中存在的问题,提出了适用于院所(厂)两级的一体化质量信息化管控平台的建设思路和框架,阐述了质量功能模块设置原则及信息化管控平台重点建设内容,并给出了后续具体实施建议.
输电装置可实现从固定部件到旋转部件的信号和功率传输.通过ANSYS有限元分析软件模拟分析了输电装置在给定压力、约束和相同的转动圈数下,因不同合金材料热膨胀系数区别导致的摩擦副接触特性的变化情况,并与Bruker高精度三维光学轮廓仪下检测的导电杆试验件接触区坐标偏移量及磨损程度进行比较.试验结果表明,理论模型可有效揭示在使用温度变化时,刷环接触区的位置和应力变化,并根据试验结果针对性地采取工艺措施,进而提高输电装置在不同使用温度中的接触可靠性.
对某超微矩形电连接器0.28mm弹性绞线插针腐蚀质量问题进行了失效分析,问题原因是由于针头镀层不致密、耐腐蚀能力不足,同时含氟导线释放微量氟加速了产品腐蚀.根据腐蚀原因对原弹性绞线插针制作工艺进行了改进,解决了 0.28mm弹性绞线插针针头熔焊点塌陷、褶皱、变形的问题,同时将带线电连接器产品的包装更改为真空包装,保证了宇航用含氟导线制作带线电连接器的贮存可靠性.
