Catalog data:
Autommobile: truck, trailer, motorcycle, dynamics, vibrations, comfort, (non-)lineair,
stability, frequency response, handling, crosswind, tyre. |
Courseyear:
MSc 1st year
Semester: 2A / 2B
Hours p/w: 2
Other hours: 4
Assessment: Oral
Assessm.period(s): By app.
(see academic calendar) |
Prerequisites:
- |
Follow
up: wb3404B, wb3404C |
Detailed
description of topics:
Basic elements of the dynamics of road vehicles
(car, truck, motorcycle). Ride vibration response to road unevenness. Sine and stochastic
roadprofile. Single, two and three mass/spring/damper systems. Linear and non-linear
models. Vibrational modes and stability. Discomfort analysis. System identification.
Roadholding: vehicle handling and stability. Response to stear input and side wind. Singel
two-wheel vehicle model to discuss effects of tyres, inertia and geometry. Influence of
several design variables: steering and wheel suspension, kinematics and compliance, toe
angle, camber, roll axis, roll stabilizer, load transfer. Motorcycle stability and modal
shapes (brief discussion of results)
|
Course
material:
Lecture notes: Voertuigdynamica A
|
References
from literature:
Mitschke, Wong, Gillespie, Newland.
|
Remarks
(specific information about assesment, entry requirements, etc.): |
Goals:
The student must be able to:
-
quantify comfort and road holding: recognise the paradox for optimal
suspension design
-
realize that linear models are approximations of reality in many aspects
-
employ single mass and higher order models for vertical vibration
analysis, and justify the choice for single d.o.f., quarter car or half
car model
-
implement the most common non linear elements in vehicle(models) and
discover some analytical solution methods
-
solve non-Linear problems with numerical integration routines
-
apply Lagrange method to derive equations of motion
-
analyze driving stability in the horizontal plane using Hurwitz
criterion
-
characterize vehicle handling in terms of under- and oversteer, apply
critical and characteristic velocity on the vehicle behaviour
-
derive the single track model, linear and including elementary
non-linear properties
|
Computer
use:
In working out the problems the computer will be
helpful.
|
Laboratory
project(s):
About 10 problems (exercises) are requested to
prepare at home.
|
Design
content:
The effect of design parameters of wheel suspension
and stearing system are discussed.
|
Percentage
of design: 25% |