Aerodynamic performance and stealth capability are two critical objectives in the design of modern unmanned combat air vehicles （UCAVs）. This study develops parametric geometric models of the UCAV airframe， inlet， and nozzle through secondary development of CAD software， and conducts aerodynamic numerical simulations of integrated internal and external flow coupling using a 1D engine model. An aerodynamic-stealth integrated optimization framework is implemented through design of experiments （DoE） and surrogate modeling techniques for the UCAV airframe， inlet and exhaust system. The results demonstrate that the proposed optimization framework achieves significant improvements in both aerodynamic and stealth performance， validating its effectiveness in multi-objective aerodynamic-stealth optimization for aircraft with highly-integrated airframe-propulsion configurations. Furthermore， this methodology shows promising potential for accelerating design iterations and reducing developmental expenditures.

With the advances in reconnaissance and reconnaissance-strike integrated technology， the transparency of the battlefield in modern warfare is increasing. The survival of military targets faces serious threats， and camouflage protection is an important prerequisite to ensure the survival on the battlefield. The inception， emergence， development and maturing of camouflage technology applications are reviewed； summarizes the research status of certain camouflage technologies such as stealth， sheltering， disruptive pattern-making， and faking. The analysis suggests that future camouflage technologies may incorporate multispectral compatibility， intelligent adaptation， and integrated designs. The paper provides important and valuable references to the R&D of military target camouflage technologies.

To improve system reliability, a synthetic control equipment with dual CPU hot-redundancy technology is proposed, in which the real time state monitor and switching on master and slave are realized by arbitration. In consideration the complexity, reliability and implementation difficulty, a redundancy management method for task-level synchronization is proposed, which realizes the synchronization of task between the master and slave through the communication link and the task synchronization software running on the CPU module. This method not only meets the device synchronization requirement, but also easy to implement with low complexity.

The bus architecture of compact peripheral component interconnect (CPCI) has been gaining immense popularity in the area if aerospace test since its establishment by PCI industrial computer manufacturer's group (PICMG). High availability (HA) system allows measurement and control system to reduce the mean-time-to-repair (MTTR) effectively and improve the mean time between critical failures (MTBCF). CPCI bus structure is taken as an example to demonstrate a perfectly developed design schemes through discussion and research. With the way to improve the power management, the underlying design can support the HA level hot swap and hot backup function, which is possible for the measurement and control system to meet the urgent need for enhancing reliability and maintainability of the system.