Design And Research Of Contralateral-type Simplified Half-rotating Wing

Flapping wing flight which possesses high adaptability,high flexibility and many other advantages has been the goal that is tirelessly pursued by a lot of scholars at home and abroad.Unlike the conventional flapping wing aircraft,Half-Rotating Wing(HRW),which was based on Harf-Rotating Mechanism(HRM)was used continuous "asymmetric rotation" instead of "asymmetric swing".It overcomes the great inertial forces generated by the wings swinging up and down,and simultaneously provides a new way of thinking in the development of the aircraft.In this dissertation,the shortcomings of the "Insilateral-type Simplified Half-Rotating Wing(ISHRW)" were improved,while the structural layout of "contralateral-type" and local constraint which adapt to it were proposed.Thereby,the Contralateral-type Simplified Half-Rotating Wing(CSHRW)was designed,which possesses important theoretical significance and engineering application value to the study of the HRM applied to flight.Firstly,according to the principle of HRM,the principle of eradicate the interference and the structure layout about the ISHRW wes introduced,then,the structural insufficient was pointed out.On the basis of above research,the structure of the half-rotating wing wes simplified,the "contralateral-type" layout was designed to eradicate the interference,and the local constraints that adapt to this layout also was designed.Secondly,the motion process of the wing for the HRW was analyzed,which found that the angular deviation would appear when the moving axes was closed to the fixed point,the constraints would be lost when the positions were coincided between the moving axes and fixed point.The angular deviation was eliminated by means of the contact between the moving sheet and the circular stator,and the lost constraints was added by means of the contact between the moving sheet and straight stator,which could make sure the smooth and accurate movement of the wing.Then,the key parameters of the moving sheet,circular stator and the straight stator were calculated,and the model was built in UG and imported to ADAMS for dynamics simulation,whose results proved the reliability of local constraints.Thirdly,due to the high frequency contact of the moving sheet and the circular stator,and the moving sheet is flaky elastomer,it is necessary to optimize the key parameters of local constraints by the minimum contact force as the objective function to improve the stability of the HRW and the life of the moving sheet.The contact model was built in ADAMS for dynamics simulation,and the simulation result showed that the contact force was reduced to 33.9%,the optimization effectively improved the stability of HRW and the life of moving sheet.Finally,on the basis of theoretical calculation,HRW prototype was processed and manufactured.The power and control system that are suitable for half-rotating wing was designed,and the key components which affected the operation of HRW were designed.The fixed running test showed that the HRW could run smoothly and the parts were running well.But,the suspension flight test showed that the HRW appeared large vibration and pitching movement,thus,it is necessary to calculate the dynamic balance.This analyzed and calculated the force of the crank and wing,then designed the size and the location of counterweight through built the dynamic equilibrium equation.The simulation showed that the counterweight could effectively eliminated the vibration and pitching movement of the HRW,which proved the excellent platform for the improvement and the test of the lift,and laid the foundation for the flight to the HRW.