To improve the accuracy of repeated deployment and positioning of solar panel

a solar panel repeatable expandable mechanism was developed. The expandable mechanism adopts the principle of internal staggered transmission of tether to realize the synchronous and repeated deployment function of the secondary windsurfing board

and adopts two horizontal and vertical arrangements to adapt to different deployment conditions of the solar windsurfing board. Based on engineering reality

two factors

hinge gap and windsurfing flexibility

were introduced to establish a dynamic model of expandable solar windsurfing

and simulation and numerical analysis were performed. The analysis results show that the accuracy of the terminal pose of solar sails decreases with the increase of hinge clearance

while the flexibility directly leads to the error in the expansion of solar sails. However

when the two are coupled

the effect of clearance on the accuracy of terminal pose can be compensated. The developed prototype of the expandable mechanism was used to test the solar wing deployment performance and the accuracy of repeated deployment positioning. The experimental results verified rational design of the hinge joint clearance

and the coupling effect of the flexibility of windsurfing and hinge clearance can compensate for the windsurfing repeatedly deployed end position error. Reasonably matching the two factors within the allowable error range can make the hinge gap value have a larger desirable range

which is beneficial for improving the positioning accuracy of the mechanism.