A Model for Quantifying System Evolvability Based on Excess and Capacity
A Model for Quantifying System Evolvability Based on Excess and Capacity
复制标题
基于过剩和容量的量化系统演化性模型
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
S. Ferguson
中科院分区：
文献类型：
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作者：
Morgan W. P. Tackett;C. Mattson;S. Ferguson
系统寿命的一个重要因素是服务阶段的可演化性，它被定义为系统在使用时从一种配置物理转变为更理想的配置的能力。这些转换在设计过程中可能是已知的，也可能是未知的；并且可能是也可能不是可逆的。在另一项研究中，我们检查了 210 个工程系统，发现系统过剩和模块化允许系统在使用过程中不断发展。基于这一观察，本文引入了数学关系，将系统的过剩性和模块化映射到系统的进化能力。正如本文所介绍的，这些关系源自弹性势能理论。通过一个简单的数值示例说明了本文提出的演化性度量和其他相关度量的使用，并将其应用于美国海军核航空母舰的设计。利用这些关系，我们表明海军的新型福特级航空母舰是迄今为止设计的最具进化性的航空母舰。虽然这里介绍的演化关系一般是基于过剩和模块化推导的，但本文提出的航空母舰示例仅考虑系统过剩。
An important factor in system longevity is service-phase evolvability, which is defined as the ability of a system to physically transform from one configuration to a more desirable configuration while in service. These transformations may or may not be known during the design process; and may or may not be reversible. In a different study, we examined 210 engineered systems and found that system excess and modularity allow a system to evolve while in service. Building on this observation, the present paper introduces mathematical relationships that map a system’s excess and modularity to that system’s ability to evolve. As introduced in this paper, these relationships are derived from elastic potential energy theories. The use of the evolvability measure, and other related measures presented herein, is illustrated with a simple numerical example and applied to the design of US Navy nuclear aircraft carriers. Using the relationships, we show that the Navy’s new Ford-class aircraft carrier is the most evolvable carrier designed to date. While the evolvability relationships introduced here are generically derived based on excess and modularity, the aircraft carrier example presented in this paper considers only the system excess.