Study On Theory And Method Of Intelligent Optimal Design For Cartridge Manifold Block

It is universal requirement for the typical hydraulic system realizing integration and standardization to develop the integrated disposition of hydraulic valves. Cartridge manifold block is the mainstream in the application and development of integrated hydraulic system, and it has already been the bottleneck for design of the integrated hydraulic system because of the species diversity and structure specificity of external components and the complexity of internal holes connection. To solve the automatic optimization design problem of outer layout and inner connection integrated schemes in the design of cartridge manifold block, the key technologies, including mathematical model for optimization design, hybrid optimization strategy of three-dimensional layout problem, the implementations of typical links in the design of layout and connection and the prototype software system for cartridge manifold block optimization design, are researched. This project is financially supported by the National Natural Science foundation of China and the anticipative research results have been obtained.After summarizing the research status at home and abroad, it is definitely raised that the core problem of hydraulic manifold block(HMB) design is automatic optimization of outer spatial layout scheme supported by automatic inner connection of channels. It can be boiled down a combinatorial optimization problem in mathematics.Based on summarizing the complexity and structural features of HMB and rules of its design and manufacture and analyzing the spatial relationship in 3D layout of cartridge manifold block, the expressions of relevant variants are put forward with object-oriented methodology. Then the optimization objects and constraints are defined, and the optimization model of cartridge manifold block design is represented. It is a complex multi-objective, multi-constraint, multi-modal engineering problem. After analyzing how to deal with the multi-objective optimization and constraints, the technological strategies of optimization design of cartridge manifold block are planned.On the basis of the unified framework of generalized neighbor search algorithms, the self - adaptative genetic simulated annealing algorithm (SGSA) is brought forward. To overcome the premature of Genetic Algorithm (GA) and slow convergence of Simulated Annealing Algorithm (SA), SA and GA is integrated in optimizing mechanism, structure and behavior. The parallelism of GA and probabilistic jumping search of SA is combined in the new algorithm, and chaos initialization technology, adaptive parameter adjustment technology and interpolating rank-based selection operator is also introduced. In addition, its process, characteristics, and efficiency are discussed. The examples indicate that SGSA has high ability of global and local search, and it is an effective optimization algorithm with high efficiency and fast convergence. The algorithm will be applied to solving the cartridge manifold block design problem.The cartridge manifold block design is divided into five following procedures, including channel check, lineweb connection, shape interference check, volume reduction and layout design. The mathematical model and application algorithm of each procedure is provided. Layout design with SGSA algorithm is the emphasis, and it is supported by other four procedures. The layout optimization design of outer components is implemented by SGSA algorithm combined with engineering oriented constraint rules. The results of calculation show that these algorithms are succinct, efficient, accurate, reliable, and they can accomplish the optimization design of integrated layout and connection schemes with high intelligence.Building an opening database with enough information is an important content of developing the intelligent optimization design system. Based on analyzing the design process of cartridge manifold block and function structure characteristics of all kinds of components, an opening database system, which is made up of component database and project database, is built by analyzing the property and construction of all components, constructing the classification hierarchy of hydraulic components and abstracting design information. To display the optimization design results and differentiate the rationality and feasibility, three-dimensional visual model of blocks, components and holes are established with 3D visualization technology and parameterized driving technology. Thus, the graphics library of hydraulic components is established and 3D visualization virtual assembly model of HMB is constructed, including three-dimensional truss model of holes and three-dimensional solid assembly model.Based on above researches, a cartridge manifold block intelligent optimization design prototype software system is developed under MDT software by integrating the algorithms of five typical parts in HMB design and using Visual C++, ObjectARX development toolkit and MCAD API. In the end, the typical integrated hydraulic system is designed by using the system and the satisfying results have testified the practicability of this system.