液压集成块集成化智能化设计理论与方法
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摘要
液压集成块是集成式液压系统的关键部件，由于其外部液压元件布局和内部油路连通的复杂性和强耦合性，传统的人工设计方法难以完成复杂的液压集成块设计，无法自动生成和优化设计方案，因此研究液压集成块智能设计方法，并开发相应的设计系统成为当务之急。本文面向液压集成块集成化智能化设计问题，采用面向对象方法建立集成块油路动态特征模型，并采用多目标进化算法实现液压元件布局和集成块油路连通设计，取得如下研究成果：
(1)在阐述液压集成块设计问题的基础上，提出了基于分层递阶解耦的液压集成块设计策略及实现方法，包括液压元件布局优化设计、油路路径智能规划和油路动态特征设计三个层次，实现由粗到细的液压集成块设计。
(2)提出了油路动态特征建模的方法，以几何层、拓扑层和参数层描述油路动态特征；并将油路动态特征模型与路径规划集成，将无冲突油路视为障碍，利用优化算法局部规划冲突路径，实现局部特征修改和油路拓扑结构自适应可变。
(3)在利用布局规则或布局实例对液压元件进行布局的基础上，对液压元件参数进行编码，利用改进的NSGA-Ⅱ算法进行优化计算，通过调用油路拓扑模式，快速计算油路长度和工艺孔数等目标函数，实现液压元件的粗布局设计。
(4)在利用网格法对液压集成块进行环境建模的基础上，提出一种新颖的混合算法MA-NSGA-Ⅱ，以迷宫算法实现路径连通与确定初始种群，以改进的NSGA-Ⅱ算法实现优化路径生成；对多油口油路，则将其分解为多个两油口连通油路，采用组合编码、分段进化的方法进行优化求解，实现油路路径的详细设计。
(5)在上述工作基础上，基于SolidWorks API、VB.NET和Microsoft Access数据库开发了液压集成块智能优化设计系统HMB Designer，并以具体工程实例验证系统的可行性与有效性。
上述研究成果丰富了液压集成块集成化智能化设计理论与方法，所开发的液压集成块设计原型系统有效提高了液压集成块设计的效率和质量。
Hydraulic Manifold Block (HMB) is the key component of integrated hydraulicsystem. For the complexity and the strong coupling of external hydraulic componentslayout and internal flow paths connection, the traditional manual design method isdifficult to complete the design of complicated hydraulic manifold block, and unableto generate and optimize design plan automaticly. So it is the most urgent thing tostudy the design methodologies and develop design system of HMB. Orienting theintegrated and intelligent design problem of HMB, this paper established dynamicfeature model of flow path for HMB using object-oriented approach, and realized thehydraulic components layout and flow path connective design via multiobjectiveevolutionary algorithms. This paper achieved the following research results:
(1) On the basis of expatiation of HMB design problems, a hierarchical decouplingstrategy and implementation method of HMB design are proposed including threelayers: the hydraulic components layout optimization design, the path intelligentplanning of flow paths, and the flow paths design based on dynamic features. Thesemethodologies realize the design from preliminary design to detailed design of HMB.
(2) A dynamic feature modeling method of flow path for HMB is proposed includingthree layers: geometry layer, topology layer and parameter layer. The dynamic featuremodel is integrated with the path planning, regarding the conflict as obstacles andplanning the local conflict flow path using optimization algorithm, and to realize theadaptive changeability of flow path topology structure.
(3) On the basis of the layout design of hydraulic components based on layout rules orlayout cases, the hydraulic components parameters are encoded, and an improvedNSGA-Ⅱ algorithm is proposed to optimize the design, and the flow path topologypatterns are called to quickly calculate the objective functions of flow path length andcross-drills quantity to complete the preliminary layout design of hydrauliccomponents.
(4) On the basis of the environmental modeling of HMB via grid method, a novelapproach which is adapted from NSGA-Ⅱ is presented, and it is termed here asMA-NSGA-Ⅱ, and the maze algorithm is utilized to generate the connective path andinitial population of NSGA-Ⅱ, and the improved NSGA-Ⅱ is utilized to generate the optimal flow path. The multi-port flow path will be decomposed into several two-portflow paths and optimized calculation using the approach of combination encoding andsegmentation evolution to complete the detailed design of flow paths.
(5) An optimization design system for HMB called HMB Designer is developed usingSolidWorks API, VB.NET and Microsoft Access, and the feasibility and effectivenessof the system is validated by an engineering case study.
The research results can enrich the integrated and intelligent design theory andmethodologies for HMB, and the prototype system can effectively improve the designefficiency and quality of HMB.
(1)在阐述液压集成块设计问题的基础上，提出了基于分层递阶解耦的液压集成块设计策略及实现方法，包括液压元件布局优化设计、油路路径智能规划和油路动态特征设计三个层次，实现由粗到细的液压集成块设计。
(2)提出了油路动态特征建模的方法，以几何层、拓扑层和参数层描述油路动态特征；并将油路动态特征模型与路径规划集成，将无冲突油路视为障碍，利用优化算法局部规划冲突路径，实现局部特征修改和油路拓扑结构自适应可变。
(3)在利用布局规则或布局实例对液压元件进行布局的基础上，对液压元件参数进行编码，利用改进的NSGA-Ⅱ算法进行优化计算，通过调用油路拓扑模式，快速计算油路长度和工艺孔数等目标函数，实现液压元件的粗布局设计。
(4)在利用网格法对液压集成块进行环境建模的基础上，提出一种新颖的混合算法MA-NSGA-Ⅱ，以迷宫算法实现路径连通与确定初始种群，以改进的NSGA-Ⅱ算法实现优化路径生成；对多油口油路，则将其分解为多个两油口连通油路，采用组合编码、分段进化的方法进行优化求解，实现油路路径的详细设计。
(5)在上述工作基础上，基于SolidWorks API、VB.NET和Microsoft Access数据库开发了液压集成块智能优化设计系统HMB Designer，并以具体工程实例验证系统的可行性与有效性。
上述研究成果丰富了液压集成块集成化智能化设计理论与方法，所开发的液压集成块设计原型系统有效提高了液压集成块设计的效率和质量。
Hydraulic Manifold Block (HMB) is the key component of integrated hydraulicsystem. For the complexity and the strong coupling of external hydraulic componentslayout and internal flow paths connection, the traditional manual design method isdifficult to complete the design of complicated hydraulic manifold block, and unableto generate and optimize design plan automaticly. So it is the most urgent thing tostudy the design methodologies and develop design system of HMB. Orienting theintegrated and intelligent design problem of HMB, this paper established dynamicfeature model of flow path for HMB using object-oriented approach, and realized thehydraulic components layout and flow path connective design via multiobjectiveevolutionary algorithms. This paper achieved the following research results:
(1) On the basis of expatiation of HMB design problems, a hierarchical decouplingstrategy and implementation method of HMB design are proposed including threelayers: the hydraulic components layout optimization design, the path intelligentplanning of flow paths, and the flow paths design based on dynamic features. Thesemethodologies realize the design from preliminary design to detailed design of HMB.
(2) A dynamic feature modeling method of flow path for HMB is proposed includingthree layers: geometry layer, topology layer and parameter layer. The dynamic featuremodel is integrated with the path planning, regarding the conflict as obstacles andplanning the local conflict flow path using optimization algorithm, and to realize theadaptive changeability of flow path topology structure.
(3) On the basis of the layout design of hydraulic components based on layout rules orlayout cases, the hydraulic components parameters are encoded, and an improvedNSGA-Ⅱ algorithm is proposed to optimize the design, and the flow path topologypatterns are called to quickly calculate the objective functions of flow path length andcross-drills quantity to complete the preliminary layout design of hydrauliccomponents.
(4) On the basis of the environmental modeling of HMB via grid method, a novelapproach which is adapted from NSGA-Ⅱ is presented, and it is termed here asMA-NSGA-Ⅱ, and the maze algorithm is utilized to generate the connective path andinitial population of NSGA-Ⅱ, and the improved NSGA-Ⅱ is utilized to generate the optimal flow path. The multi-port flow path will be decomposed into several two-portflow paths and optimized calculation using the approach of combination encoding andsegmentation evolution to complete the detailed design of flow paths.
(5) An optimization design system for HMB called HMB Designer is developed usingSolidWorks API, VB.NET and Microsoft Access, and the feasibility and effectivenessof the system is validated by an engineering case study.
The research results can enrich the integrated and intelligent design theory andmethodologies for HMB, and the prototype system can effectively improve the designefficiency and quality of HMB.
引文
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