training on teaching of car development process with an...
TRANSCRIPT
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Jozef Bucha
Training on teaching of car development process with an illustration of ergonomics and
simulations
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What is Adams?
• Automatic Dynamic Analysis of Mechanical Systems
• Development started in 1974 at the University of Michigan
• Mechanical Dynamics, Inc. started with Adams/Solver
• MDI was acquired by MSC in 2002
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Adams Modules in version 2014
• Adams/Solver• Adams/View• Adams/PostProcessor• Adams/Flex• Adams/ViewFlex• Adams/Durability• Adams/Vibration• Adams/Controls
• Adams/Exchange• Adams/Tire FTire• Adams/Insight• Adams/Car• Adams/Machinery
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Adams/Car
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Adams/Car - advantages
• Database structure• Prepared templates• Quick and easy vehicle components changes• Predefined vehicle maneuvers• Incorporated flexibility of bodies• Taylored for vehicle simulations
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Adams/Car – database structure
• All projects are organized in databases• One database prepared by MSC, with sample models
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Adams/Car – templates
• Adams/Car contains around 25 prepared templates• All necessary components of vehicle are prepared
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Adams/Car – data workflow
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Adams/Car – data workflow• Templates - Defines vehicle sub-assemblies topology (that is, how theparts and joints fit together in the model, how information is transmitted,and so on). For example, a template could be a suspension type, whichcan be defined either as front and/or rear.• Subsystems - A mechanical model that references a template and tailors itby supplying parameters that adjust the template (for example, locationsthat define part dimensions and spring stiffness). These models areusually a major system of your vehicle, for example, front suspension,steering system, and body.• Assemblies - A list of subsystems and a single test rig combined in avehicle or suspension assembly. A test rig is necessary to provide anactuation, in your model, for analysis.
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Adams/Car – subsystemPointsPart propertiesSpring, damper, bushing properties
Subsystem
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Adams/Car – assemblies
• Suspension assembly• Full vehicle assembly• General actuations assembly• Fourpost assembly (Adams/Car Ride plugin)• Component assembly (i.e. Tyre analysis)
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Adams/Car – assemblies
• Suspension assembly
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Adams/Car – assemblies
• Suspension assembly
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Adams/Car – assemblies
• Full vehicle assembly
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Adams/Car – assemblies
• Full vehicle assembly
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Adams/Car – assemblies
• Fourpost assembly (Adams/Car Ride plugin)
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Adams/Car – simulation
• Interconnection between Adams modules
.adm file
.acf file
.msg file
.req file
.res file
.gra file
.out file
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Adams/Car – suspension simulation
• Data workflow during suspension simulation
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Adams/Car – suspension simulation
Types of simulation• Quasi static simulations• Dynamic simulations
Quasi static simulation• Wheel travel analysis• Steering analysis• Roll and vertical force analysis• Static load
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Adams/Car – suspension simulation
Quasi static simulation• Opposite wheel travel
Bound 100 mmRebound -100 mm
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Adams/Car – suspension simulation
Quasi static simulation• Steering
Upper steering limit -360 degLower steering limit -360 deg
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Adams/Car – suspension simulation
Dynamic simulation STEP (x, x0, h0, x1, h1)STEP(time,2,0,4,100)
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Adams/Car – suspension simulation
Static load Wheel vertical force 0-2500N
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Adams/Car – suspension simulationOutputs from simulations• Data of parts of assembly• Data of joints, springs, dampers, bushing• Testrig data• 25 suspension characteristic of non steerable suspension• 11 suspension characteristic of steerable suspension
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Adams/Car – full asembly simulation
• Data workflow during full assembly simulation
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Adams/Car – full asembly simulation
• Vehicle maneuvers are carried out with Driving machine
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Adams/Car – full asembly simulationTypes of simulation• Dynamic simulations• Static and quasi static maneuvers• Adams/Smart Driver
Dynamic simulations• Open loop steering events• Cornering events• Course events• Roll stability events
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Adams/Car – full analysis simulation
Course events - ISO lane change• ISO-3888: Double Lane Change
Vehicle speed 100 km/h
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Adams/Car – full analysis simulation
Course events – 3D course• 3D road with artifical obstacles
Vehicle speed 30 km/h
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Adams/Car – full analysis simulation
Adams/Car Truck plugin
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Adams/Car – full analysis simulation
Vehicle speed 80 km/hOpen loop steering event– single lane change
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MSC Software licences and knowledgeware• Students editionshttp://www.mscsoftware.com/student-editions• Students competitionshttp://www.mscsoftware.com/page/formula-student• Academic motion bundlehttp://www.mscsoftware.com/teach-msc• Academic learning centerhttp://www.mscsoftware.com/msc-academic-learning-center• Adams Tutorial Kit for Mechanical Engineering Courseshttp://www.mscsoftware.com/page/adams-tutorial-kit-mechanical-engineering-courses
Adams Tutorial Kit
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Modules not maintaned by MSC• Adams/Engine• Adams/Aircraft• Adams/RailLast versions in Adams 2008. Currently maintained by VI-Grade
http://www.vi-grade.com/
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Modules not maintaned by MSC
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Usage MSC Adams on FME STU• 150 licenses of Adams 2005 • 2 licenses of Adams 2014• Unknown nmber of student licenses
http://atc.sjf.stuba.sk/