为掌握雷达装备的抗电磁干扰性能，需要对其进行全面的电磁环境效应测试与评估，为雷达应用及电磁防护加固提供技术支撑。从二阶互调电磁辐射伪信号干扰效应机理出发，引入效应指数的概念将复杂电磁环境适应性的多变量问题用单一变量表征，实现了雷达装备复杂电磁环境伪信号干扰效应的定量表征，建立了二阶互调伪信号干扰效应评估模型。以某型扫频连续波测距雷达为研究对象，针对受试雷达在试验中出现的二阶互调伪信号干扰现象，给出了模型参数的确定方法，提出雷达装备二阶互调伪信号干扰效应预测评估方法。实验验证结果表明：无论是改变伪信号敏感电平，还是在大辐射频偏、大互调频差范围内改变双频电磁辐射组合，采用普适性二阶互调伪信号干扰效应模型对受试雷达进行二阶互调伪信号干扰效应评估，评估误差均在2.5 dB以内，依据效应预测方法能够客观评估雷达装备二阶互调伪信号干扰。

Overview: Driven by the rapid development of national optical projects such as laser nuclear fusion and aerospace telescopes, as well as high-end civilian fields such as advanced instruments and optical lenses, the requirements for full-frequency domain processing errors and surfaces of optical components are becoming more and more stringent. At this stage, the optical components generally need to go through rough grinding, fine grinding, polishing and coating, and other processes, and their surface quality mainly depends on the defect removal ability and error control level of the polishing process. Whether the fine grinding process can obtain better surface shape accuracy and low surface/subsurface damage suppression determines the processing efficiency, and the ultra-precision processing manufacturing equipment is the premise of the realization of ultra-precision machining of the optical components. So far, all countries in the world have invested in the research and development of optical ultra-precision grinding and polishing technology, and have developed more relatively mature high-precision grinding and polishing equipment, which can better meet the processing needs of most of the current optical components. For the core equipment and key technologies required for ultra-precision manufacturing, China has long relied on imports. In order to break through the bottleneck restricting the development of ultra-precision technology in China at this stage, under the traction and drive of the national large-scale engineering project, China has made remarkable progress in optical ultra-precision manufacturing equipment and technology. However, for the optical ultra-precision technology and equipment, there is still a certain gap between China and the international advanced level, and it is necessary to continue to strengthen the research. In addition to the high-end grinding and polishing equipment necessary for the ultra-precision machining of optical components, it is also necessary to strengthen the technical level of a series of key supporting units, such as ultra-precision grinding and polishing processing technology, high-end key functional components, intelligent monitoring technology of processing environment, efficient ultra-precision machining tools, processing and inspection path planning and compensation processing strategies, computer-aided manufacturing and testing software, etc. The research, development, and application of these technologies are related to the development of high-end manufacturing in the civilian fields and national defense fields, and are also the focus of the country. This paper mainly focuses on the ultra-precision machining of large-diameter optical aspherical components. Starting from the grinding and polishing process route, this paper introduces the long-term research progress of the Precision Engineering Laboratory of Xiamen University in the field of large-diameter optical aspherical component processing, and introduces in detail the technical and system achievements such as ultra-precision grinding and polishing equipment, robot-assisted grinding and polishing, equipment intelligent monitoring system, processing technology and control software.

高效、高质清洗是激光清洗的主要发展方向，也是实现激光清洗大规模工业应用的关键。国家重点研发计划“增材制造与激光制造”重点专项“大能量高重频脉冲激光智能清洗技术与装备”（共性关键技术类）针对航空和航天领域的装备制造和修护中，对精密、绿色、智能可控的新型清洗技术的迫切需求，解决多光束激光清洗多场耦合效应作用机制科学问题，突破大能量高重频纳秒激光器多维度增益协同调控、复杂曲面激光清洗残留物定位识别与路径规划和超宽幅面多光束联动拼接与能量控制等关键技术，开展大能量高重频纳秒脉冲激光器、激光高效高质清洗机制与关键技术和超宽幅面激光智能高效清洗成套工艺与装备研究。研究成果将在航天器表面热控涂层和飞机雷达罩表面除漆清洗去除中实现典型应用。