Asteroid Mission Design Software Tool for Planetary Defense Applications

A new preliminary trajectory design method for asteroid rendezvous mission using multiobjective optimization techniques is proposed. This method can overcome the disadvantages of the widely employed Pork-Chop method. The multiobjective integrated launch window and multi-impulse transfer trajectory design model is formulated, which employes minimum-fuel cost and minimum-time transfer as two objective functions. The multiobjective particle swarm optimization (MOPSO) is employed to locate the Pareto solution. The optimization results of two different asteroid mission designs show that the proposed approach can effectively and efficiently demonstrate the relations among the mission characteristic parameters such as launch time, transfer time, propellant cost, and number of maneuvers, which will provide very useful reference for practical asteroid mission design. Compared with the PCP method, the proposed approach is demonstrated to be able to provide much more easily used results, obtain better propellant-optimal solutions, and have much better efficiency. The MOPSO shows a very competitive performance with respect to the NSGA-II and the SPEA-II; besides a proposed boundary constraint optimization strategy is testified to be able to improve its performance.

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A new duct design software tool

Building and Environment ◽

10.1016/s0360-1323(02)00134-8 ◽

2003 ◽

Vol 38 (4) ◽

pp. 521-531 ◽

Cited By ~ 1

Author(s):

E.H. Mathews ◽

D.T. Claassen

Keyword(s):

Software Tool ◽

Design Software ◽

Duct Design

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Usability Evaluation of Software Tools for Engineering Design

Proceedings of the Design Society: International Conference on Engineering Design ◽

10.1017/dsi.2019.136 ◽

2019 ◽

Vol 1 (1) ◽

pp. 1303-1312

Author(s):

Helena Hashemi Farzaneh ◽

Lorenz Neuner

Keyword(s):

Engineering Design ◽

Design Research ◽

Evaluation Method ◽

Software Tool ◽

Software Tools ◽

Usability Evaluation ◽

Smart Devices ◽

Design Software ◽

Support Engineering

AbstractMuch of the work in design research focusses on the development of methods and tools to support engineering designers. Many of these tools are nowadays implemented in software. Due to the strongly growing use of computers and smart devices in the last two decades, the expectations of users increased dramatically. In particular users expect good usability, for example little effort for learning to apply the software. Therefore, the usability evaluation of design software tools is crucial. A software tool with bad usability will not be used in industrial practice. Recommendations for usability evaluation of software often stem from the field of Human Computer Interaction. The aim of this paper is to tailor these general approaches to the specific needs of engineering design. In addition, we propose a method to analyse the results of the evaluation and to derive suggestions for improving the design software tool. We apply the usability evaluation method on a use case - the KoMBi software tool for bio-inspired design. The case study provides additional insights with regards to problem, causes and improvement categories.

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