Research On Design Method Of Integrated Air Circuit Board For Brake Control System

The integrated air circuit board is a key component of the train brake control system.Its design involves the layout of external components and internal air circuit planning.The design quality of integrated air circuit board determines the degree of integration of the brake control system.Traditional design methods rely on labor and experience,the coupling is poor and need to redesign when components or gas circuits are changed,which causes additional design costs.Therefore,the research on integrated gas circuit board design methods has theoretical and practical value.The design of the integrated gas circuit board is a multi-objective optimization problem.The optimization targets are the component layout area and the gas path length.The design goal should try to meet the minimum component layout area and the shortest gas path length.This paper proposes a hierarchical design method that dynamically associates components and gas circuits,which improves design efficiency and makes intelligent design possible.The design method is based on the genetic algorithm,the design plan is regarded as the individual in the algorithm,which is expressed as the layout order of the components,and iterative evolves through genetic operations such as crossover and mutation.The fitness function based on the non-dominated solution set of the multi-optimization objective function is used to optimize the individual,and the selection is made according to the results of the fitness evaluation,the optimal solution is finally obtained.This article first defines the optimization objective function of component layout and path planning,and designs genetic operations such as coding,crossover,mutation,etc.,formulates corresponding basic strategies and methods for different design goals.The component layout needs to consider the installation position,installation angle and spacing of the components and other constraints.The gas path planning needs to consider the design sequence of the gas path,the design sequence of the gas path branch,the gas path spacing,and the corner transition.The size,structure,and location of components are described by rectangles containing attributes.The component layout adopts a strategy based on the upper boundary line.The upper boundary line is the upper edge of the top-level rectangle.The combination of the upper boundary line and the update situation are discussed,and the layout position of the components is finally determined.The global coordinates of the vertices of the rectangle are obtained through coordinate transformation,and then the component layout area is calculated.The connection relationship between components greatly affects the path planning of the gas circuit,it described by the adjacency matrix of the undirected graph.For the currently completed component layout,the A* algorithm based on the evaluation function is used for path planning and estimation.The introduction of the value function can dynamically optimize the search direction to reduce the search range and improve efficiency.The focus of the evaluation function is to estimate the cost between the current point and the target point,compare and analyze different distance representation methods and design the evaluation function.On the basis of the above theoretical research,the integrated gas circuit board design system is developed based on C#.The system is divided into component information module,component layout module,path planning module and scheme evaluation module.The feasibility and effectiveness of the system are verified with examples.The results show that the design method and system improve the design efficiency while meeting the design requirements.The above-mentioned research results have enriched the optimal design of integrated gas circuit boards,and have contributed to improving the efficiency and quality of the integrated gas circuit board design.