Adaptive airbag system for increased evacuation safety

Faraj, Rami; Popławski, Błażej; Gabryel, Dorian; Kowalski, Tomasz; Hinc, Krzysztof

doi:10.1016/j.engstruct.2022.114853

Cited by 7 publications

(8 citation statements)

References 8 publications

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“…Practical implementations of the original ideas are conducted using the rescue cushion in 1:2 scale and a full-scale demonstrator of semi-passive valves. According to the already obtained results it is experimentally proven that a significant improvement of the system's characteristics can be achieved by introducing valves of simple construction [1]. In this study the influence of a delayed start of the adaptation procedure is investigated in detail.…”

mentioning

confidence: 89%

“…The inflatable structure being a subject of this paper is a type of an airbag system and is called rescue air cushion or safety cushion, what relates directly to its application. Rescue cushions are devices applied by fire brigades for evacuation of people at heights [1]. The airbag, which is a main part of the rescue cushion, utilizes the pneumatic effect of compressing the air and releasing the compressed gas in order to obtain favorable loading profile.…”

Section: Introductionmentioning

confidence: 99%

“…The paper focuses on the implementation of adaptive, semi-passive valves [10], which were invented in the Institute of Fundamental Technological Research. In the following sections authors introduce their structure and explain their operation on the example of laboratory demonstrator.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

On Influence of Delayed Adaptation of Inflatable Structure for Evacuation of People at Heights

Popławski,

Faraj,

Gabryel

2023

10th ECCOMAS Thematic Conference on Smart Structures and Materials

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Our study presents the research on elaboration of a novel type of the rescue air cushion, which is an inflatable structure used by fire brigades for evacuation of people at heights. The goal of our work is to increase its injury prevention capabilities. We consider the system based on an airframe filled with a compressed gas and a double-chamber airbag, which exchanges the air with environment. Discussed research includes modelling of the system, numerical simulations of its dynamic behavior and description of the dedicated adaptive solution. Practical implementations of the original ideas are conducted using the rescue cushion in 1:2 scale and a full-scale demonstrator of semi-passive valves. According to the already obtained results it is experimentally proven that a significant improvement of the system's characteristics can be achieved by introducing valves of simple construction [1]. In this study the influence of a delayed start of the adaptation procedure is investigated in detail. Obtained conclusions are used in order to indicate directions of further system development, which will concern, among others, estimation of the impacting body trajectory and identification of the impact position.

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confidence: 89%

Section: Introductionmentioning

confidence: 99%

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On Influence of Delayed Adaptation of Inflatable Structure for Evacuation of People at Heights

Popławski,

Faraj,

Gabryel

2023

10th ECCOMAS Thematic Conference on Smart Structures and Materials

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“…The novel airbag inspired by origami design is introduced here with the layouts displayed in Figure 1b-d The mass of the returnable spacecraft is defined as 𝑀 = 300 kg. The ratio of the returnable spacecraft mass to the cushion airbag volume is generally 1000~1100 kg/m 3 [18]. The internal pressure of the cushion airbags here is designed as the standard atmospheric pressure of 101 kPa because it is used for the returnable spacecraft back to Earth.…”

Section: Design Of Combined Cushion Airbagmentioning

confidence: 99%

Multi-Objective Optimization Design of an Origami-Inspired Combined Cushion Airbag

Xu,

Yang,

Huang

et al. 2024

Aerospace

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To improve the cushioning performance of soft-landing systems, a novel origami-inspired combined cushion airbag is proposed. The geometry size, initial pressure, and exhaust vent area of the cushion airbags are designed preliminarily using a theoretical model. The finite element models, including the returnable spacecraft and cushion airbags, are established via the control volume method (CVM) to analyze the impact dynamic behavior and cushioning performance during the landing attenuation process. The cushioning performance of the cushion airbags in complex landing environments are studied to investigate the influence of horizontal velocity, lateral velocity and nonhorizontal landing surfaces. Four design parameters of the cushion airbags, including the initial pressure, venting threshold pressure, exhaust vent area and polygon edge number, are employed to study their influence on the cushioning performance. A multi-objective optimization model of the cushion airbags based on the neural network and multi-objective water cycle algorithm is established to realize the rapid optimization design. The Pareto front of the maximum overload and specific energy absorption is obtained. The analysis results show that the maximum overload of the proposed combined cushion airbags is 7.30 g. The system with the anti-rollover design can avoid rollover and achieve outstanding cushioning performance in complex landing environments. The maximum overload of the returning spacecraft is decreased by 16.4% from 7.30 g to 6.10 g after multi-objective optimizations. This study could provide the technical support for the soft-landing system design of returnable spacecrafts.

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“…In the case of aviation and aeronautics, the typical application of shock absorbers pertains to aircraft landing gears [9][10][11], while less common but equally important are helicopter seat suspensions [12], airdrop systems [13,14], emergency landing airbags for drones [15], or suspensions of lunar-planetary landers [16]. In turn, within rescue applications, the effective protection of people falling from heights is provided by the use of impact detection systems [17] and safety airbags [18]. Moreover, impact mitigation devices are important for everyday applications, including the design of helmets [19], bicycle dampers and handlebars [20], and wearable airbags [21].…”

Section: Introductionmentioning

confidence: 99%

Adaptive Impact Mitigation Based on Predictive Control with Equivalent Mass Identification

Graczykowski,

Faraj

2023

Sensors

Self Cite

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The paper presents the concept of equivalent parameter predictive control (EPPC) elaborated for semi-active fluid-based (hydraulic and pneumatic) shock absorbers equipped with controllable valves and subjected to impact excitation. The undertaken problem concerns the absorption and dissipation of the impact energy with the requirement to minimize the generated reaction force and corresponding impacting object deceleration. The development of a control strategy for a challenging problem with unknown impacting object mass and unknown changes of external and disturbance forces is proposed and discussed in detail. The innovative solution utilizes the paradigm of model predictive control supplemented by the novel concept of equivalent system parameters identification. The EPPC is based on the online measurement of system response, the computation of the equivalent mass of the impacting object, and the repetitive solution of the optimal control problem with various prediction intervals and constraints imposed on valve opening. The presented method is proven to operate robustly for unknown excitations, including double-impact conditions, and it has similar efficiency to control methods developed previously for known impact parameters.

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Adaptive airbag system for increased evacuation safety

Cited by 7 publications

References 8 publications

On Influence of Delayed Adaptation of Inflatable Structure for Evacuation of People at Heights

On Influence of Delayed Adaptation of Inflatable Structure for Evacuation of People at Heights

Multi-Objective Optimization Design of an Origami-Inspired Combined Cushion Airbag

Adaptive Impact Mitigation Based on Predictive Control with Equivalent Mass Identification

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