The principle and application of pendulum used in the experiment of impulse coupling between laser and target

Based on the impulse coupling process between laser and target,a new method of combining pendulum with light electric tachometer was presented,which was adopted in the experiment of impulse coupling between laser supported detonation wave and aluminum target.Considering the air buoyancy,air friction and the pendulum line weight,the actual kinetic equation of pendulum was deduced from the principle of work and power and the rotation theory when the reasonable model of air friction was found.Furthermore,the precision of the kinetic equation of pendulum was checked.Finally,after comparison,the experimental result with the new methodwas in agreement with the experimental result from other methods.