Reliability allocation of agricultural machinery based on improved integrated factors method
Existing reliability allocation methods are less applied in the field of agricultural machinery,and in order to better meet the reliability allocation needs of agricultural machinery,this paper proposes a reliability allocation method for agricultural machinery based on improved integrated factors method(IFM).The method integrates six influencing factors including subsystem severity A1,improvement potential A2,complexity A3,maintainability A4,environmental conditions A5 and technology level A6 for the characteristics of agricultural machinery,and forms the weight factor of subsystem failure rate to realize the allocation of the specified overall system reliability target to the subsystem level.For newly developed products,the evaluation reference standard for the value of each influence factor is given,which can be quantitatively calculated by FMECA combined with expert scores.Taking 2BMQF-6/12 no-till planter as an example,the improved IFM is applied to allocate its reliability,and the feasibility of the proposed method is verified by comparing it with the IFM,FOO,Kim's and Yadav's methods.The allocation results of the proposed method are reasonable,the process is complete,and the factors considered are relatively comprehensive,which can provide a reference for the reliability allocation of agricultural machinery and a basis for the reliability design of agricultural machinery products.
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