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Abstract The single pendulum equation is commonly used to model the vibration characteristics of a single pendulum subjected to variable forces. A stochastic single pendulum equation driven by Wiener process describes the vibration phenomenon containing a noise term. However, there are also contradictions in some cases. Therefore, in this paper, uncertain single pendulum equation driven by Liu process is proposed to depict noise. Furthermore, analytical solutions as well as the inverse uncertainty distribution (IUD) of solutions for a class of uncertain single pendulum equations are presented. Finally, a paradox related to the stochastic single pendulum equation is given in the appendix.
Qiu et al. (Tue,) studied this question.
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