The protection of vulnerable road users(VRUs)is currently one of the most challenging societal *** governments and consumer organizations have set targets to reduce the VRU fatality and injury *** targets function as ...
详细信息
The protection of vulnerable road users(VRUs)is currently one of the most challenging societal *** governments and consumer organizations have set targets to reduce the VRU fatality and injury *** targets function as an incentive for the automotive industry to develop pedestrian and cyclist detection systems that combine environmental perception,risk estimation,and vehicle dynamics control(***,steering).However,the complexity of VRU detection makes the process of designing and evaluating such active VRU protection systems a difficult and time-consuming *** software can help to overcome these difficulties by providing an efficient and safe development *** paper outlines the use of the software package PreScan for the development of active VRU protection *** PreScan,a VRU protection system is modeled and virtually evaluated in various different traffic *** system model presented in this paper fuses radar and camera data to deploy driver warnings and autonomous braking before *** reduces the impact speed between the VRU and the vehicle,thereby mitigating the negative effects of the *** work will consider virtual robustness testing by subjecting the VRU protection system to a wide range of traffic scenarios and environmental conditions(***,snow,fog,darkness).
As the computer calculation speed is improved year by year,the size of the vehicle model is constantly increasing to capture more and more geometric details for better simulation validation and *** better injury predi...
详细信息
As the computer calculation speed is improved year by year,the size of the vehicle model is constantly increasing to capture more and more geometric details for better simulation validation and *** better injury predictions,it is equally important to have the finite element dummy models with similar mesh size and *** keeping the time step at 0.8 micro second,the latest hybrid Ⅲ 5th-％tile female dummy finite element model was completely re-developed with a refined mesh size of 4-8 mm and targeting on neck and chest performance *** paper describes the development of the Humanetics v7.0 Hybrid Ⅲ 5th-％tile female dummy finite element *** model was created based on the FTSS brand with refined meshes and geometric details,such as joint stops,knee sliders,bolts,nuts,and *** will not only provide better physical representations but also the mass properties,such as the center of mass gravity and moment of *** model was well validated at material,component,assembly and full dummy levels with significant correlation improvement compared to the previous version,*** attentions were paid to modeling the joint stops,which were modeled as a moment-angle function from quasi-static test in the *** new joint stops are modeled as solid elements with validated material properties to provide more physical response and greatly reduce the ***-stress is another new feature introduced to nodding blocks,neck rubber,bib,pelvis foam and pelvis *** helps achieve superior correlation in critical areas such as the neck and the ***,CORA [1] rating system was used to objectively rate and compare the performance of this new *** the PDB sled case,an all time high CORA rating of 0.91,on a scale of 0-1,was accomplished.
Vehicle stability is a major active safety requirement with great potential for reducing road *** safety systems,such as Electronic Stability Control(ESC),have been clearly demonstrated to improve safety by stabilizin...
详细信息
Vehicle stability is a major active safety requirement with great potential for reducing road *** safety systems,such as Electronic Stability Control(ESC),have been clearly demonstrated to improve safety by stabilizing the vehicle in critical ***,ESC is becoming mandatory in different countries worldwide and related regulations have progressively been coming into force in the US,Canada and Europe during the period from year 2008 until *** ESC regulation tests are based on one single manoeuvre known as Dwell *** manoeuvre reproduces severe obstacle avoidance where ESC efficiency is checked in terms of yaw stability and lateral ***,passing the Dwell sine test does not guarantee good and safe performance for other critical ***,additional test procedures should be defined in order to test vehicle stability in a wider range of accident *** paper describes a set of test procedures which cover with only a few specific manoeuvres the widest possible range of critical *** more than a simple pass/fail result,these test procedures will be able to quantify and therefore compare the safety performance of involved active safety systems and complete vehicle *** results could be used by the suitable organisations to define a rating system to thereby increase public awareness of the active safety performance of vehicles on the *** the development of the test procedures,state-of-the-art test instrumentation is considered in order to maximise test objectiveness and ***,special emphasis is given to normalise test results with the aim of avoiding track/grip dependency and adapting the assessment to the different vehicle *** paper summarizes the latest developments corresponding to the stability assistance domain of the European project eVALUE(Testing and Evaluation Methods of ICT-based Safety Systems,FP7-ICT 1 st call,grant agreement no.
Children,elderly,and obese occupants are vulnerable populations and at increased risk of death and serious injury in motor-vehicle crashes compared with mid-size young male ***,current injury assessment tools,includin...
详细信息
Children,elderly,and obese occupants are vulnerable populations and at increased risk of death and serious injury in motor-vehicle crashes compared with mid-size young male ***,current injury assessment tools,including crash dummies and finite element(FE)human models,do not account for immature and growing body structures for children,nor the body shape and composition changes that are thought make aging/obesity adults more *** address this problem,a novel approach to human FE modeling has been developed,in which a baseline human FE model can be rapidly morphed into other geometries representing subjects with different age,body mass index(BMI),stature,and/or gender,based on statistical geometry models developed from medical images and whole-body laser *** of this approach to the development of a pediatric head model that has geometry that is parametric with age and adult thorax and lower extremity models that have geometry that is parametric with age,gender,stature,and BMI is *** method proposed in this study enables future vehicle design optimizations targeting at various vulnerable populations that cannot be considered with current injury assessment tools.
暂无评论