An improved GO-FLOW model for reliability analysis and prediction of cold-standby systems
针对现有GO-FLOW模型无法处理冷备用系统因设备状态应力不同和结构复杂导致的可靠性建模问题，提出一种包含新型Type-45算子的改进模型，并通过变频驱动系统算例验证其可行性。
Cold-standby, serving as typical methods to enhance system reliability, are extensively utilized in a wide range of systems that necessitate high mission reliability. However, owing to the varying stresses that the equipment is subjected to in its standby and operational states, coupled with the potentially complex structures of cold-standby systems, the current GO-FLOW model is found to be inadequate for addressing such scenarios. To address this issue, an improved GO-FLOW model containing a novel type of GO-FLOW operator (the Type-45 operator) was proposed in the paper, where the discrete Markov model was employed as intrinsic computational logic to calculate the output signal of the operator. The Type-45 operator integrates two distinct output modes, and in the paper, the process of reliability modeling utilizing these two output modes was elaborated upon, aiming to address the reliability modeling challenges of cold-standby systems that are relatively independent or associated with other devices in the whole system. Finally, a numerical example of a hypothetical four-active-unit and one-standby-unit variable frequency drive system (FOVFDS) was provided to illustrate the feasibility and accuracy of the proposed method.