Research On System Of A Damper Used For Vertical Landing Reusable Launch Vehicle

In order to reduce the launch cost,the vertical take-off and landing reusable launch vehicle has received extensive attention.An important part of the reusable vehicle is recycling.In the recycling,soft landing is the key of a successful recovery.To land smoothly and successfully on the ground,a soft-landing technology for the vehicle has been a key research content.In the meanwhile,higher demands are put forward for the design and analysis of the vehicle.The damper plays a significant role,which can absorb the impact energy when landing on the ground.Hence,it can ensure the safety of the vehicle structure and equipment and prevent the turnover.Based on the overall parameters of the vehicle,preliminary design of the landing device is conducted.A dynamic model is established used by ADAMS View.Kinematic pairs and constraint force are added into the parameterized dynamic model.Dynamic simulations and parameter testing are done in several landing conditions.Effects of parameters such as the initial horizontal velocity,the angle of inclination,the frictional coefficient,angular speed of pitch are considered according to the landing performance index of the vehicle.Finally determine four limited conditions and analyze its landing response curve.A soft-landing scaling shock system is designed.Based on the condition of four struts landing,experimental data such as axial acceleration,displacement,axial load on the main structure and the stroke of the oil damper are collected by sensors.By analyzing the results of the test data and simulations,dynamic simulation results are comparatively consistent with the test.The error is acceptable,which implies the accuracy and reliability of the dynamic model.