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In order to study the constant volume combustion performance of the mixed charge of super-porous propellant and super-porous coated propellant, 37-hole nitroguanidine propellant and 37-hole nitroguanidine coated propellant containing flame retardant TiO2 were prepared. At high temperature(50°C), normal temperature(20°C), low temperature(-40°C), a constant volume combustion experiment was performed on a mixed charge with a mass ratio of 1: 1 for the 37-hole propellant and the 37-hole coated propellant. The research results show that the constant volume combustion performance of the mixed charge is different from a single coated propellant and a single base propellant. The p-t, dp/dt-t and L-B curves of the mixed charge were between the coated propellant and the base propellant, but mixed charge has the greatest progressive combustion. And the temperature dependence of the progressive combustion of mixed charge is small, which has a certain low temperature effect.

According to network collaborative virtual assembly characteristics, the architecture of product virtual assembly system in network environment is put forward. The system includes four layers: Client Layer, Function Layer and Data layer. The system includes main program and all kinds of agent, which can be divided into assembly agent, communication agent and Collaboration agent. Collaborative processes among all agents were designed. A client / server structure of the programming model based on winsock technology was studied. Then the Collaborative assembly process based on multi-agent and realization technologies of real-time collaboration were studied, a new prototype system was developed as well. A case study showed that the system made it possible for collaborators in different places to realize collaborative analysis and optimization of product assembly design under network.