Structural Impact Source Identification Based On Soft Computing And Its FPGA Implementation

Structural damage has become a common problem in aviation,military and other fields at present,and most of the causes of such damage comes from impact,because the damage can not even be found and causes accidents,so the study of impact source identification system has very important significance.But due to the complexity of traditional recognition method and high cost,the new soft computing method can through data training to establish a model to omit intermediate complex calculation process and has the ability of dealing with nonlinear and complex,thus this article basing on soft computing designs a impact source identification system,the specific research work is as follows:1.the history of impact source identification is introduced by consulting journals,literatures and master and doctoral papers,and the damage caused by structural damage is analyzed,as well as the urgency of impact source identification.On this basis,the soft computing method is introduced,the types of soft computing methods and the specific theoretical knowledge are introduced,and finally the impact source identification system method based on fuzzy neural network is proposed.2.According to the characteristics of the fuzzy neural network model,an experimental acquisition platform was built.A large number of shock waveforms were collected by oscilloscope,and the data were imported into Matlab to calculate the mean value and maximum value of all waveforms.3.The hardware circuit realization of data acquisition system is introduced,including instrument amplification circuit,filter circuit,acquisition and transmission circuit,introduction of FPGA minimum system and matters needing attention in PCB layout.4.Introducing FPGA software realization of the impact source recognition system,firstly it introduces the development course of FPGA and the design process,and then introduces the fuzzy neural network module,the rule base module,Deblurring module,the weight parameter calculation module and output module of FPGA implementation,finally it introduces the AD7903 module of data acquisition system and the realization of the SDRAM module,so it completes the whole impact source recognition system.5.First,the training of the experimental simulation model and thirty times ofverification of the simulation model were introduced.Then,the actual system experiment was set up.Finally,thirty times of verification of the impact source identification system were carried out.