The Research On Radar System Standardization Modeling And Simulation Technology

For the different kinds of classifications in radar system, in the course of radarsimulation, it usually has to design different implementation codes even though thereare two similar radar function models. So model reusability is a difficult problem forradar simulation. Standardized modeling is to refine common function modules underdifferent simulation conditions, then build the hierarchical, multi-granularity objectmodel system and finally construct a general simulaton framework to simplifycomplexity. There are several key technologies including objects’ communication,distributed simulation control mechanism, data-driven between members and interfaceautomatic code generation, parallel simulaton algorithm or architecture and etc. Thesekey technologies are the core issues surrounding the interconnection among simulationobjects, the efficiency of simulation and simulation model specification.In this dissertation, radar system has been analyzed carefully based on theprinciple of radar. By means of system simulation, some issues were discussedincluding radar object modeling, simulation framework, model standardization andinteroperability, parallel simulation and etc. It aims to establish a standardized andgeneralized framework based on object model, bulid up a mediate communicationmodel with message passing interface, build up a data-driven model with data center byresearch on the interoperability issue existed in radar’s simulation objects, propose anew radar simulation engine by research on the controlling issue existed in distributedsimulation, build up a multi-data links model for multi-core memory-shared platformand a parallel task allocation model for multi-node systems by research on parallelstructure. The main contributions of dissertation are summarized as follows:1. Standard Simulation FrameworkFrom the perspective of system modeling and model standardization, radar systemmodel has been abstracted into a hierarchial architecture includeing application layer,system layer, subsystem layer, component layer, common algorithm layer andsupporting layer. The framework could be used to solve the reuse problem. We usetemplate to define simulation model. Model transformation and code automatic generation could promote simulation efficiency. Object models use a common structureto solve interaction problem between the inner and external component.2. Inter Process Communication Service Model in Radar SimulationWe propose the inter process communication service model based on messagecenter, establish a message definition template and an access control strategy which isused to solve the interoperability and communication between simulation members.3. Distributed Simulation Control Mechanism in Radar SimulationThe distributed scheduling control structure and its engine mechanism betweenradar simulation members are studied carefully. Then we propose a message passingalgorithm to achieve the control of simulation members in distributed architecture.4. Data Driven Model and Interface Code Automatic GenerationWe propose a normalized standard data interface with descriptive rules to definesimulation members’ information in diffirent levels. This method could solvedata-driven problem and object codes’ self-generating could promote efficiency.5. Parallel Simulation ModelAccording to the independent characteristic existed in radar tasks of the samescheduling interval, we propose a multi-data links model based on multi-corememory-shared platform for radar system simulation. This parallel model couldimprove radar simulation system’s running efficiency greatly.In multi-node system, we propose a parallel task allocation algorithm. Thistask-node assignable optimization algorithm takes the least task executed spending as itsobjective constraint. The optimal solution can be obtained by task grouping. In order tosatisfy the input condition of Hungary algorithm, it adopts matrix partition and virtualphalanx construction to convert input matrix from unbalanced to balanced problem. Thematch result which can be obtained by iterative calling Hungary algorithm is optimal forthe given determinate efficiency matrix.6. Using key technologies above, we build up radar simulation softwares withcharacteristics including modular, variable parameter and distributed arichitecture.