The parachute container cover ejection separation is the first and foremost motion for the return capsule recovery system,which is related to the success of a r
A high cycle fatigue reliability analysis approach to helicopter rotor hub is proposed under working load spectrum.Automatic calculation for the approach is imp
The development of an innovative drilling system makes it necessary to model the material of extra-terrestrial soil , i.e.regolith or lunar soil.And then the dr