Resarch On Modeling And Analysis Methods Of Testability Design For Airboren Dispensing Weapons

Aerial dispersal weapon is a kind of high precision,multi-purpose and modular aerial guidance attack weapon outside the defense zone.It can be launched outside the enemy's air defense firepower area,and can precisely deliver the ammunition carried to the target for spraying.According to the different types of submunitions carried in the mother projectile,it can be used to attack various surface targets such as enemy airport runways,technical weapon positions,large aircraft on the apron,power facilities,cluster armed personnel,etc.Different from other air-guided munitions,air distribution weapons are relatively complex.In order to meet the rapid,flexible and effective support requirements of the army for equipment and improve the level of fault diagnosis and isolation of such pro ducts,it is of great significance to the testability research of aerial distribution weapons.Firstly,the various factors that affect the testability requirements of the system are comprehensively analyzed,and the relevant testability index system of th e system is analyzed in combination with various conditions and actual conditions that need to be considered in the maintainability design requirements of the system.The testability index system of the equipment system suitable for the dispenser is established,the testability design parameters of the system are reasonably selected,and the testability requirement model of the system layer is established.Based on the testability index determination method of stochastic Petri net(SPN),the testability requirement model of dispenser system is established,and the testability quantitative index requirement of the system is determined as the basis for subsequent testability design.Secondly,the disseminator is analyzed,a hierarchical method of system function based on maintenance level is proposed,and the dispenser system level model is established to determine the system level division.Three commonly used testability allocation algorithms of weighting,failure rate and comprehensive weighting are analyzed and compared respectively.Combined with the use requirements of aerial distribution weapons and considering multiple testability influencing factors comprehensively,the comprehensive weighting allocation algorithm is selected as the allocation calculation model,and the index allocation is carried out according to the system function levels concerned by system-level maintenance,so as to determine the index allocation quota of each unit.Finally,a multi-signal flow modeling method substituted with uncertain information is proposed,and a testability correlation matrix model of the dispenser system is established,which makes up for the deficiency of the traditional "fault-signal-test" model in processing uncertain information.Based on the prediction of the testability index of the dispenser by the model,it is verified that the model can be used for testability analysis of weapons and equipment systems and can meet the actual engineering requirements.