The Study Of Clamp Band Based On Variable Cross Section Flexible Aluminum Ring

Clamp band separation technolgy which is one of most important releasing technologies plays a essential role in launching satellites successfully or not.Due to the drawbacks of pyrotechnic clamp band,like high releasing shocking,no reusing and testing difficultly,reseachers around the world pay more attention to non-pyrotechnic clamp band technogly.In this paper,a flexible aluminum ring with variable cross section is used as the core component of the connection in the small satellite emission separation background.,and a DC motor is used to as the driver to develop a non-explosive triggering package tape separation device.Firstly,clamp band separation device’s structure was designed basing on variable cross-section flexible aluminum ring.A triggered unlocking method was designed to shorten the unlocking time for unlocking.In the paper,equal stiffness method was used in designing Clamp band separation device.Aluminum ring deformation model was established by Castigliano Theorem and energy method.Analysing the contact model of aluminum ring and upper ring,relative curvature radius was put forward to measure the aluminum ring uniform deformation.In order to improve aluminum ring’s deformation performance,finite element software was used to improve the parametric design of flexible aluminum ring.Secondly,the connection and separation properties of the separation device were analyzed detailedly to ensure the safety and reliability.According to the simulation results of the contact force between flip beam and upper ring,the device was divided into 23 units in parallel to obtain the load ability.The time sequence of the separation action is analyzed and flip beams is turned out of the ring and simplified into a mass stiffness damping system to estimate the separation time.Then,The separation device is analyzed to ensure that can meet the requirements of stiffness,strength and vibration environment adaptability at the time of operation with the ANSYS.Natural frequencies and formations of the flexible aluminum ring were obtained by modal analysis using ANSYS.Some dynamic characteristics,like contact force distribution,separation time and posture,were obtained by the rigid-flexible coupling dynamic simulation using ANSYS and the multi-body dynamics software ADAMS.Finally,the clamp band separation device is is fabricated,and the experimental platform is built.to make locking test,unlocking test.The test shows that the separation device can meet the requirements of triggered releasing,automatic locking,low release impacting and repeatable testing.