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The piston high-low pressure launch device for micro-robot is designed based on the technology of high-low pressure chamber launcher. Theoretical analysis and numerical simulation of the launch process have been made by applying the interior ballistics theory. The result of numerical simulation is consistent with the experiments. According to numerical simulation and data analysis, the piston high-low pressure launch device could reduce the acceleration of micro-robot in launch process obviously. The mathematical model derived in this paper could be used to analyze and optimize the parameters of the piston high-low pressure launch device and be a foundation for the structure design of launch device. [ABSTRACT FROM PUBLISHER]

A new method on the simulation of the floating automatic of artillery is presented in this paper. The calculation expressions of floating automatic spring forces and hydraulic resistances are deduced by analyzing the mechanical characters of the artillery. The recoil resistance is calculated in a new way based on the finite element method using the APDL (ANSYS parametric Design Language). During the simulation process, the dynamic coupling effect between floating automatic components and other parts of the artillery have been taken into consideration. Seven running fire experimentation was carried out during which the recoil displacements of the receiver were measured. The effective of the program was verified through the comparison of the results of simulation and experimentation. The method proposed in this paper can improve the veracity of simulation especially in the analytic process of vibration responses of artillery system. [ABSTRACT FROM PUBLISHER]