The simulation and model of twisted lever-arm effect in transfer-alignment of strapdown inertial navigation
Based on the theory of twisted lever-arm effect, this paper provided a new model for the lever-arm effect caused by the shipboard weapons' transfer-alignment, not considering the dynamic twist. Deflection angle of the second-order Markov process model was established and set up in simulink. Composed with the non-twisted lever-arm effect, the result showed that the acceleration error caused by dynamic twist was large and need compensated.
Analysis on the Lever-Arm Effect in Transfer Alignment of Strapdown Inertial Navigation System
A Transfer Alignment(T/A) method is the process of transferring the high accuracy navigation information(position,velocity,and attitude) from the Inertial Navigation System(INS) of the launch vehicle(master INS) to a weapon INS(slave INS) which is typically located on a launcher located in a remote weapon bay.A lever arm vector denotes the physical separation of the master INS and the slave INS.Separation-induced linear accelerations that are sensed by the slave INS but not by the master INS should be compensated.This paper will focus on the issues concerning the miscalculations caused by lever arm effect.
Numerical Simulation of Thermal Sensitivity for Explosives
In order to compare the thermal sensitivity of several typical explosives, this article solved numerically one-dimensional transient heat conduction equation including thermal decomposition for explosives with finite difference method. The explicit difference equations under different boundary conditions were established, and the corresponding stability criterion was derived. The ignition times for typical explosives were calculated, which was used to evaluate thermal sensitivity of explosives.