Abstract:

The movement principium of rotation joint of umbrella antenna was studied and the motion reliability model of rotation joint based on unascertained theory was built. Synthetically considering the undulatory property of the output moment of motor, non-homogeneity of material parameter and dimension errors, this paper treats the mechanism motion function as one with some unascertained variables. With the application of computational theory of unascertained rational numbers, the reliability calculation formulas are built corresponding to the performance functions according to moment and work respectively and the motion reliability of rotation moment in the whole spreading process is predicted. Compared to the existing random method, the proposed method is easy to use. Reliability can be predicted with higher confidence even with inadequate data or insufficient information. Finally, the possible values and confidences of unascertained performance function of antenna rotation joint are given by an example, which confirms the rationality and feasibility of the presented method.
Submitted on March 31, 2009. Received from the Guest Editor on August 25, 2009
References: 13