2results about How to "Realize Reliability Assessment" patented technology

The application discloses a multi-state system multi-source inaccurate information correction method, comprising the following steps: step 1, constructing a reliability function of the system, building an evidence network model and a conditional belief quality table; step 2, collecting multi-source inaccurate information provided by experts on the reliability evaluation of the multi-state system at different moments in the whole life cycle of the multi-state system; step 3, constructing a reliability consensus reaching model according to the multi-source inaccurate information provided by the experts to correct the multi-source inaccurate information; by solving the model, the multi-source inaccurate information reaching a specified consensus threshold is obtained under the premise of fully respecting the original opinions of the experts; and step 4, calculating the reliability function of the system and outputting the reliability evaluation result reaching the consensus. The application can identify and effectively correct the multi-source inaccurate information collected from the multi-state system, and maximally resolves the conflicts, so that the reliability information at different levels is effectively fused.

The invention belongs to the technical field of electric shovel evaluation, and discloses an electric shovel low-voltage electric appliance reliability evaluation method, which comprises the steps of collecting environment data of a severe environment where a target electric shovel is located, selecting performance degradation characteristics of an electric shovel low-voltage electric appliance, and synchronously monitoring electric appliance data with the performance degradation characteristics changing along with time in real time; establishing a unary linear Wiener degradation model of the electric shovel low-voltage electric appliance according to the performance degradation characteristics, inputting electric appliance data, obtaining model parameters, and calibrating a mapping relation between the environment data and the model parameters; presetting a failure threshold value of the performance degradation characteristic, and calculating a probability density function and a reliability function of the life of the low-voltage electric appliance of the electric shovel in combination with the model parameters and the mapping relation; generating a probability density curve and a reliability curve of the service life of the electric shovel low-voltage apparatus according to the probability density function and the reliability function, and performing reliability evaluation on the electric shovel low-voltage apparatus; according to the method, the degradation model is established by selecting the performance degradation characteristics, so that reliability evaluation of the low-voltage electric appliance of the electric shovel is effectively realized.