In this study, the dynamic characteristics analysis of deployable panels with three-dimensional (3D) clearance joints is pursued through an innovative clearance measurement experiment. The geometric and mechanical characteristics of the clearance joint are thoroughly analyzed to establish a dynamic model for deployable panels with clearances. Leveraging the spatial two-point method, a clearance measurement system is developed while effectively eliminating system errors. A verification experiment is conducted to assess the accuracy and reliability of the measurement method. By comparing the measurement results with numerical data of the deployable panel, the feasibility of the theoretical model is validated. Extending our investigation, we explore the multifaceted influence of deployment speed, clearance radius, and deployment mode on the panel's dynamic response. The experimental results demonstrate that the vertical deployment mode, with deployment times ranging from 30 to 60 s and clearance radii varying between 0.1 and 0.2 mm, yields the most favorable dynamic characteristics for the deployable panel.