Modeling of Occupant Kinematic Response in Pre-crash Maneuvers A simplified human 3D-model for simulation of occupant kinematics in maneuvers - A simplified human 3D-model for simulation of occupant kinematics in maneuvers

Visa enkel post
dc.contributor.authorCyrén, Oscar
dc.contributor.authorJohansson, Sofia
dc.contributor.departmentChalmers tekniska högskola / Institutionen för mekanik och maritima vetenskapersv
dc.contributor.departmentChalmers University of Technology / Department of Mechanics and Maritime Sciencesen
dc.date.accessioned2019-07-03T14:48:52Z
dc.date.available2019-07-03T14:48:52Z
dc.date.issued2018
dc.description.abstractMost car manufacturers today equip their cars with collision avoidance systems which can act to avoid or mitigate a crash. Retrospective studies have shown that these systems help reduce the number of crashes, however the intervening evasive maneuvers provoke occupant displacements. Consequently the occupant’s position relative to the restraint systems of the car is affected. Therefore, there is a need to investigate occupant safety also for the pre-crash phase when these evasive maneuvers take place. There are an extensive number of maneuvers to consider and the existing methods for simulating the occupant during the pre-crash phase are inefficient with respect to time. For that reason, a more efficient dynamic model of the occupant was developed to primarily compute the head kinematics and secondarily T1 kinematics, when the occupant model is subjected to the linear- and rotational accelerations that are induced by evasive maneuvers. The model represents the upper body of an occupant, i.e. a front seat passenger or a driver, which is restrained by the seat, the seat belt, as well as the arms if the model is a driver. Two types of occupant models were proposed based on the inverted spherical pendulum theory. The systems of differential equations were derived using Lagrangian mechanics and implemented in Simulink. The models were tuned and validated based on pre-existing volunteer data from vehicle maneuver studies. The results demonstrate that the models were able to capture the occupant kinematics by showing similar dynamic behavior to the kinematics of test subjects in volunteer tests. The computation time when simulating a maneuver of approximately 4 seconds, resulted in a computation time of 0.7 seconds for both models, which allows for efficient computation of an extensive number of pre-crash maneuver simulations for analysis of occupant kinematics.
dc.identifier.urihttps://hdl.handle.net/20.500.12380/255527
dc.language.isoeng
dc.relation.ispartofseriesMaster's thesis - Department of Mechanics and Maritime Sciences : 2018:57
dc.setspec.uppsokTechnology
dc.subjectTransport
dc.subjectHållbar utveckling
dc.subjectMatematik
dc.subjectFastkroppsmekanik
dc.subjectFarkostteknik
dc.subjectTransport
dc.subjectSustainable Development
dc.subjectMathematics
dc.subjectSolid mechanics
dc.subjectVehicle Engineering
dc.titleModeling of Occupant Kinematic Response in Pre-crash Maneuvers A simplified human 3D-model for simulation of occupant kinematics in maneuvers - A simplified human 3D-model for simulation of occupant kinematics in maneuvers
dc.type.degreeExamensarbete för masterexamensv
dc.type.degreeMaster Thesisen
dc.type.uppsokH
local.programmeEngineering mathematics and computational science (MPENM), MSc
Ladda ner
Original bundle
Visar 1 - 1 av 1
Bild (thumbnail)
Namn:
255527.pdf
Storlek:
5.9 MB
Format:
Adobe Portable Document Format
Beskrivning:
Fulltext
Ladda ner
Samling
Examensarbeten för masterexamen