Inertia force and moments of flapping wing in insect flight were studied using the methods of theoretical modeling and simulation.The influence of stroke amplitude

stroke duration

mid-stroke angle of attack and flip duration on inertia force was studied by simulating the biological locomotion of insect flight.The study results show that: the magnitude of inertia force is almost equivalent to that of the aerodynamic force during the high frequency flap of small insect;the insect wing`s chord inertia is much higher than its spread inertia——higher by an order of magnitude;the influence of stroke moment of inertia is much higher than that of the flip moment of inertia

so the flip moment of inertia can be ignored;it's believed that the flap is almost symmetrical if the stroke is symmetrical and the flap is absolute symmetrical if the stroke and the flip are both symmetrical

then the inertia force can be ignored.How to design the control mechanic of insect-like flapping wing air vehicle to increase the symmetrical and eliminate the influence of inertia force was discussed at last.