Abstract: In order to improve the accuracy of missile launch under the whole tire supporting cold emission mode, the mathematics equations of four-axle-interconnected hydro-pneumatic suspension are derived to verify the correctness of simulation model established by AMESim. A co-simulation model that takes the root-mean-square value of launch tube end as an optimization target is built by using ADAMS/Simulink/AMESim, and the optimized result is obtained by using genetic algorithm. The initial pressure, total volume of the accumulator and the diameter of damper-hole are selected as design variables. The working conditions of that the vehicle slant angle is 0° and the missile erecting angle is 900°are studied. The results show that the RMS of launch tube end is decreased by 61.1%, and the accuracy of missile launch is greatly improved. Besides, the pitching angle and load distribution are more reasonable, which increase the stability of launching system. The accuracy of missile launch and the stability of launching system can be both raised by using co-simulation with multiple softwares based on genetic algorithm.

Key words: ordnance science and technology, cold launching, whole tire supporting, dynamic analysis, four-axle-interconnected hydro-pneumatic suspension, optimization design