In this paper we explore established methods for optimising multi-objective functions whilst addressing the problem of preliminary design. Methods from the literature are investigated and new ones introduced. All methods are evaluated within a collaborative project with British Aerospace for whole system airframe design and the basic problems and difficulties of preliminary design methodology a...

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We approach the problem of automated knowledge discovery from an empirical perspective. We are developing an artiicial agent, called the Scientist's Empirical Assistant (SEA), that discovers the structure of the world by formulating hypotheses and testing them through controlled experimentation. SEA is a mixed-initiative system which supports a human scientist in common scientiic activities, su...

Developments in computational hardware and simulation software have come to a point where it is possible to use whole mission simulation in a framework for conceptual/preliminary design. This paper is about the implementation of full system simulation software for conceptual/preliminary aircraft design. It is based on the new Hopsan NG simulation package, developed at the Linköping University. ...

The Method of Imprecision, or MoI, is a formal method for incorporating imprecise information into a design process. This methodology has been exercised on a problem in preliminary vehicle structure design in collaboration with VW Wolfsburg. Results show that the method is useful in trading off multiple conflicting attributes, including styling preferences and engineering requirements.

The design of an object-oriented framework for combinatorial enumeration is described. Combinatorial enumeration requires a subtle interplay between the search mechanism, the ordering of the space of combinatorial objects, and the symmetries used to prune equivalent cases from the search. EEciency requires that pruning be used as much as possible, while correctness requires the pruning not be u...

An evolved version of the Technology Identification, Evaluation, and Selection (TIES) method is presented that provides techniques for quantifying technological uncertainty associated with immature technologies. Uncertainty in this context implies forecasting. Forecasting the impact of immature technologies on a system is needed to provide increased knowledge to a decision-maker in the conceptu...

A novel capsule pipeline transportation system using a linear synchronous motor, called Magplane MagPipe, is under development with the intention to replace trucks and railways for hauling materials from the mine to the rail head, power plant or processing plant with reduced operating cost and energy consumption. The initial demonstration of a MagPipe line in Inner Mongolia will be a 500 meter ...

Software agents have been increasingly used in the product and process development in industry over the past years due to the rapid evolvement of the Internet technology. This paper describes agents for the integration of conceptual design and process planning. Agents provide mechanisms to interact with each other. This mechanism is important since both of those processes involve negotiations f...

As manufacturers shift their focus from selling products to providing services, designers must increasingly consider the life-cycle requirements, in addition to conventional design parameters. To identify possible areas of concern, engineers must consider knowledge gained through the life cycle of a related product. However, because of the size and distributed nature of a company's operation, e...