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To promote the development of unmanned ground vehicles, it is very necessary to establish a scientific and reasonable evaluation system for unmanned ground vehicles. This paper analyses the structure and operation of unmanned ground vehicles, and also proposes a multi-attribute comprehensive evaluation system for unmanned ground vehicles. Based on six aspects including environment perception, communication command, behavioural decision-making, human-computer interaction, weapon system and mobile platform, a new evaluation indicator system is established. In the quantitative process of qualitative indicators, Z-number theory is introduced to better describe the uncertainty degree of judgment and reasoning in human’s understanding of complex things. In order to make the indicator weights more scientific, the combined weighting model with analytic hierarchy process and information entropy is adopted for weight analysis, which not only takes into account the influence of evaluation experts on weights, but also reduces the subjective arbitrariness of weights. The least-squares grey relational analysis method is used to analyse the correlation between the comparison series and the reference series, and a comprehensive quantitative evaluation result of the unmanned ground vehicles is obtained. The evaluation examples of unmanned ground vehicles show that the proposed evaluation system can quantitatively evaluate the overall technical performance of unmanned ground vehicles. This evaluation system has high reference value for the evaluation of other complex weapons.

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A numerical model was established by using ABAQUS for a police riot suit which was composed of nylon, foam polyethylene and sandwich board under low energy impact provided by 7.5 kg ball head impact assembly. The impact force and the energy absorbed by the riot suit are numerically analyzed, and the structure of the riot suit is improved. The results show that the peak impact force of the improved riot suit is reduced by 11.7%, and the energy absorbed by the improved riot suit is increased by 12.1%. The accuracy of the numerical model is verified by comparing the low energy impact test of the riot suit. The obtained results can provide theoretical guidance for the structural design of the police riot suit.