Bruno Augusto - Academia.edu (original) (raw)

Papers by Bruno Augusto

est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés o... more est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

This paper evaluates the effectiveness of an active chassis control function after an initial lig... more This paper evaluates the effectiveness of an active chassis control function after an initial light impact. The experiment was designed in a high-fidelity driving simulator with motion platform that is adapted to mimic a real-world crash. The post-impact control function here superimposes individual-wheel brake and steering wheel torque in order to minimize the vehicle maximum lateral deviation from its original traveling lane. It is found out that drivers with the function intervention has smaller lateral deviation after the disturbance from an initial impact, and thus less risk of leaving the road which may cause a secondary impact. The driver reaction with and without the function is also found to be different in terms of both braking the steering behaviours.

Nesta obra, Roberto Guedes organiza textos acerca do Antigo Regime Português, em especial, de sua... more Nesta obra, Roberto Guedes organiza textos acerca do Antigo Regime Português, em especial, de suas práticas políticas, econômicas, religiosas e culturais, entre outras, ligadas à escravidão na América portuguesa e em

The setup of a run-off-road scenario was based on the current knowledge about critical runoff- ro... more The setup of a run-off-road scenario was based on the current knowledge about critical runoff- road situations and accidents. The scenario was initiated by a visual secondary task. During the task, an added clockwise yaw deviation, intended to create the run-off-road scenario, was presented visually but not by the vehicle dynamics or the lateral acceleration of the simulator's motion system. Results from two experiments show that the drivers frequently neutralised the yaw deviation because of their lack of full attention to the secondary task, the occasionally rough yaw deviation, or a combination of both. Because of the frequently neutralised yaw deviations, the number of steering-wheel interventions from an implemented system, intended to steer back into the lane in run-off-road situations, became limited in number. The system generated in total 14 steering-wheel interventions, ranging from torque levels of 0.3 to 3.7Nm. During ten of the interventions, the driver counteracted...

Yaw motion feedback plays an important role for the perception of motion in driving simulators. T... more Yaw motion feedback plays an important role for the perception of motion in driving simulators. This paper investigates the momentary rotation points’ importance on the driver behaviour, through a simulator experiment. A double lane change manoeuvre was used to measure the driver behaviour and perception for two different rotation point presentations; steady state and dynamic. Only subtle differences in driver behaviour and perception could be noticed, but the dynamic rotation point is favourable. This is more prominent for low friction driving. The results of this work show that the momentary rotation point, i.e. the point in which the planar motion can be described by a single rotation, contains information that is valuable to the driver. This motion can be represented by most motion platforms.

This work aimed at analysing the potential for the application of large driving simulators on the... more This work aimed at analysing the potential for the application of large driving simulators on the study of future automated driving functionality. The case study was centred on applications for heavy vehicles, focusing on lane-change manoeuvres and automated driving. A simulation environment was created which hosted a model of a real world road, motion emulation with high fidelity truck dynamics, controllable surrounding traffic and a driver assistance system including autonomous driving. Two types of heavy vehicles were selected for this study, an 80ton and 32m long A-Double combination vehicle and a 40ton and 20m tractor semi-trailer. The final experimental set-up was driven by a group of professional truck drivers. It was concluded that today’s resources in terms of hardware, software and even knowledge base satisfy the requirements for testing such automated systems in a holistic way. Driving simulators are capable of providing much valued feedback as well as insight at early st...

The aims of this study were to develop a lane-change scenario for driving simulators in order to ... more The aims of this study were to develop a lane-change scenario for driving simulators in order to analyse the characteristics of lane-change manoeuvres performed with heavy vehicles. The scenario was set up based on information from lane-change accidents and on-road lane-change observations. The gap acceptance scenario consisted of two consecutive lane changes were the intention was to study truck drivers’ accepted gap between two vehicles in the adjacent right lane, at the initiation of each lane change. An experiment was conducted with 18 truck drivers in a full-motion driving simulator with implemented high fidelity models of an 80tonnes and 32m long vehicle combination and a 40tonnes and 22m tractor semi-trailer. The results showed no statistically significant difference in the accepted gaps to the lead and lag vehicles in the target lane. For both heavy vehicles, the overall average lead gap and lag gap was estimated to 0.85s and 0.83s respectively, at the average velocity of 17...

Single vehicle accidents are commonly caused by fatigue and distraction and resulting in severe c... more Single vehicle accidents are commonly caused by fatigue and distraction and resulting in severe casualties and high economic costs. In order to evaluate driver recovery from run-off-road accidents, comprising of 80% of fatal crashes on rural roads, a simulator study in an advanced full-motion driving simulator was carried out. Drivers were given a secondary task to perform at six positions down the road (to simulate distraction), and an artificial yaw deviation was added to the vehicle to induce a run-off-road accident whilst the driver was distracted. The results show that the severity of the recovery manoeuvre was larger than similar events caused by the failure of automated lane keeping systems, leading to lane departures. Furthermore, significant learning effects was found, providing recommendations for further studies into run-off-road experiments.

Revista Tempo, Espaço, Linguagem (TEL), 2021

dictada por el profesor Gabriel F. Carini. Entrevistadores: Entendiendo que las tareas de investi... more dictada por el profesor Gabriel F. Carini. Entrevistadores: Entendiendo que las tareas de investigación y práctica docente son parte del trabajo de los profesores/historiadores, nos gustaría saber cómo articula ambos. Dr. Gabriel Fernando Carini: Bueno. Como voz bien decís, la articulación entre esas actividades, digamos, son una obligación para los docentes, al menos de la Universidad Nacional del Río Cuarto, donde se incorpora al estatuto de la carrera docente, la necesidad de trabajar en esas tres actividades. En nuestro caso, hay con diferentes estrategias o campos de acción, en donde ponemos

Urban Forestry & Urban Greening, 2021

This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

Catalysis Letters, 2020

The materials hydrotalcite—HT, hydroxyapatite—HAp and hydrotalcite–hydroxyapatite—HT–HAp were syn... more The materials hydrotalcite—HT, hydroxyapatite—HAp and hydrotalcite–hydroxyapatite—HT–HAp were synthesized using the co-precipitation method at constant pH (pH 10), in which first the materials of HT and HAp were synthesized and later a reaction mixture for the formation of HT–HAp material. The materials were characterized by X-ray diffraction (XRD), N2 adsorption and desorption, infrared spectral analysis (FT-IR), thermogravimetric analysis (TG) and morphology. The results indicated that the analysis by XRD confirmed that all materials (HT, HAp, and HT–HAp) presented the typical basal peaks of HT and HAp and that in the HT–HAp material it presented a better crystalline ordering. The analysis of specific surface area (BET) showed that the mixture of materials (HT–HAp) caused a loss of the specific area, indicating a possible interaction between the particles of both materials. The pore diameters showed mesoporosity. In addition, the materials HT, HAp and HT–HAp had their catalytic activity determined through transesterification reactions using different lipid raw materials (commercial soy oil and vegetable oil deodorization distillate-VODD) obtaining ethyl esters (biodiesel) as a product. The results for the raw material commercial soybean oil showed that the catalysts HT and HAp obtained incomplete reactions, that is, they presented low conversions in ethyl esters (about 39–65% in 6 h of reaction). On the other hand, the study of the influence of temperature on the calcination of the HT–HAp catalyst obtained high conversions in ethyl esters, about 98% for the catalyst calcined at 700 °C, under conditions of 45:1 ethanol/oil molar ratio, temperature of 70 °C, catalyst concentration of 5% and 6 h of reaction. With the transesterification of soybean oil as a comparative form, the catalyst in its best conditions was used to transesterify the VODD by-product. Which results of conversion into considerable ethyl esters were found (about 88%, in just 6 h of reaction), thus confirming that the chemical catalyst was able to form the main esters of fatty acids even using different lipid sources.

Climate, 2020

The current linear economic system has led Europe to unsustainable development, aggravating sever... more The current linear economic system has led Europe to unsustainable development, aggravating several issues, such as climate change, limitation of resources, and pollution. As a sustainable alternative, circular economy (CE) has been promoted around the world. This economic system allows for the maximization of a product’s life, thus decreasing its environmental impact and increasing its value. The main goal of this work is to scrutinise the concepts of CE over time, from the beginning of the concept, to its implementation in Europe and its application in Portugal. In addition, the requirement for strategies that led to studies on regional urban metabolism are addressed. Another goal is to examine Portugal and see how the country is dealing with the implementation of strategies for CE, moving from concept to practice. This part of the work resulted in the creation of the REMET-UA model, a tool to assess the regional economic metabolism, which also has the potential to evaluate synerg...

REVISTA ESMAT, 2016

O texto trata do caso penal numa perspectiva filosófica a respeito das limitações à obtenção da v... more O texto trata do caso penal numa perspectiva filosófica a respeito das limitações à obtenção da verdade no processo penal. Sabendo-se que os fatos imputados ao cidadão aportam no processo por meio das provas, busca-se demonstrar que as diversas limitações à atividade probatória impedem que a sentença penal exprima uma verdade absoluta.

Vehicle System Dynamics, 2019

This article investigates the potential of a motion-based driving simulator in the field of vehic... more This article investigates the potential of a motion-based driving simulator in the field of vehicle dynamics testing, specifically for heavy vehicles. For this purpose, a case study was prepared embodying the nature of a truck dynamics test setup. The goal was to investigate if the drivers in the simulator could identify the handling differences owed to changes in vehicle parameters, while driving the simulated trucks. Results show that the drivers could clearly identify the differences in vehicle behaviour for most of the performed tests, which motivates further investigative work in this area and exposes the feasibility of heavy vehicle dynamics testing in simulators.

Vehicle System Dynamics, 2016

This research work studies the impact of single wheel hub motor failures on the dynamic behaviour... more This research work studies the impact of single wheel hub motor failures on the dynamic behaviour of electric vehicles and the corresponding driver reactions. An experimental study in a moving-base driving simulator is conducted to analyse the influence of single wheel hub motor failures for motorway speeds. Driver reaction times are derived from the measured data and discussed in their experimental context. The failure is rated objectively on the dynamic behaviour of the vehicle and compared to the subjective evaluation. Findings indicate that critical traffic situations impairing traffic safety can occur for motorway speeds. Clear counteractions by the drivers had to be taken.

Revista de Pesquisa : Cuidado é Fundamental Online, Sep 3, 2012

Objective: To analyze the insertion and the vision of the partner about prenatal care, identify a... more Objective: To analyze the insertion and the vision of the partner about prenatal care, identify and analyze the reasons that lead to a number of these partners do not accompany their pregnant women in prenatal care. Methods: Descriptive qualitative approach, with data collection through semi-structured interview with open questions and further analysis of the content. Results: We conducted 20 interviews, 15 of the Municipal Maternity Alzira Vieira Ferreira Reis and 05 at the Hospital University Antonio Pedro. Conclusion: It is noticeable, with little or no participation of men reported by women in the process of family planning. It has been demonstrated that the partner is receptive to our call, that the stimulus mobilizes the professional man, even with a restricted view about prenatal care, believing that all that effort of the health system is only to monitor the baby's development.

International Journal of Vehicle Systems Modelling and Testing, 2015

Every dynamic driving simulator, no matter how advanced its motion system is, has limited space i... more Every dynamic driving simulator, no matter how advanced its motion system is, has limited space in which to recreate the accelerating motions of the simulated road vehicle. The VTI driving simulator Sim IV is no exception. The classic motion cueing algorithm used in Sim IV strives to centre the drivers cabin in the simulator motion envelope and is tuned to precisely accommodate accelerations in a worst case scenario without hitting the physical boundaries. Using knowledge about the road ahead and the vehicle model one can preposition the cabin to an off-centre point, virtually increasing the available space so that larger motions are made possible. This aims to increase the impression of realism in the driving experience. The prepositioning algorithm presented in this thesis is developed as an addition to the current motion cueing algorithm and make use of road-and vehicle data to find a suitable preposition. The motion to the preposition is made under the human perception threshold to avoid rendering of false cues. Simulations show that the amount of acceleration presented by the sled can, with prepositioning, be increased by up to 25% in longitudinal and 53% in lateral direction. During a comparative study of the simulator motion, test subjects indicated that they had a more realistic driving experience with than without prepositioning.

The VTI simulator IV (Sim IV) is the fourth advanced driving simulator designed and built at The ... more The VTI simulator IV (Sim IV) is the fourth advanced driving simulator designed and built at The Swedish National Road and Transport Research Institute (VTI). The simulator, taken into operation 2011, has an 8 degrees of freedom (DoF) moving base, a field of view (FoV) of 180 degrees and features a system for rapid cabin exchange. With a budget of roughly 2,4 M euro; Sim IV was developed to provide VTI’s newly established Gothenburg office with advanced driving simulation capability, and to be a cost efficient complement to the Sim II and Sim III facilities in VTI’s Linköping office. This paper describes the design and technical performance of the facility. A brief summary of results and experience from validation studies for the first three years of operation is also presented

Passive safety testing has been based on accident research where objective physical evidence can ... more Passive safety testing has been based on accident research where objective physical evidence can be compiled and analysed when establishing technical test requirements. Active safety tests pose new challenges because objective data is more difficult to obtain. Until pre-crash variables became available in Event Data Recorders (EDR), the only sources of pre-crash vehicle motions were tire marks or witness statements. Both data sources have limitations since they may not always be available and require interpretation by the analyst. The pre-crash EDR data variables provide an objective source of data to active safety test development. However, the suitability of the data has not been thoroughly investigated in the published literature. The review of existing data shows that the variables identified in the new EDR requirement in Part 563 are useful but incomplete for a comprehensive analysis of vehicle dynamics manoeuvres prior to a crash. In particular, the absence of vehicle yaw rate reduces the positioning accuracy of the vehicle in reconstructions. The objective data in the limited cases were used to compile the frequency of precrash braking and steering, and when possible, the magnitude of these driver inputs. Active Safety test development will benefit with more EDR analysis but the older data that does not conform to Part 563 has limited application.