摘要
本文对多目标动态规划分层解法进行了改进和完善,采用分阶段搜索筛选的办法求解各目标在相应的工程宽容范围内的允许策略集合,使这一方法更具适应性和实用性。文中概述了这种动态多目标决策方法在载人航天环境控制和生命保障系统方案评价和优化中的应用。最后给出了这种方法在求解代谢氧回收再生过程技术方案评价优化中的具体应用实例。
An approach to improve the hierarchical resolving method of multiobjective dynamic programming was developed, and the hierarchical and staged resolving of the dynamic multiobjective decision was presented by the authors. The method converted the multiobjective decision into a series of single objective decisions according to the rank of their importance, and also objects layered by its permissible range of the engineering, then the suitable policy sets of each goal was found out with the method of stage searching and sifting in each layer. As a consequence, the optimum option was recommended. Here the authors described the principal principium, steps computation of and flow diagram of dynamic multiobjective decision hierarchical-staged resolving method. The advantage of the method is that the quantity of computation decreased from layer to layer and stage to stage, especially for complicated systems. Moreover, it can search for the optimum options of stages while the whole 'system option was guaranteed in optimization. So it shows further adaptability and practicality. The paper summarized the method of dynamic multiobjective decision application in the assessment and optimization of the scheme of manned space station environmental control/life support system (ECLSS). There are many things which involved the optimization of multiobject and multistage. For example, the process of metabolic oxygen recovery, which has stages of CO_2 concentration →CO_2 reduction→O_2 generation,and there are multiobjective restrains and requirements for technological projects with inclusion of weight, volume, power required and reliability etc. in each stage. Satisfactory results would be recommended with the method of dynamic multiobject decision to assess and optimize the candidate options. Finally, a practical example of the method in the assessment and optimization of the technological projects for the resolution of the process of metabolic oxygen recovery was presented.
出处
《航天医学与医学工程》
CAS
CSCD
1992年第4期263-270,共8页
Space Medicine & Medical Engineering
关键词
生命保障系统
环境控制
动态规划
life support systems, environmental control, dynamic programming, decision making, optimization
