The quarter-car model of a vehicle suspension and its free body diagram are shown in Figure 1. In this simplified model, the masses of the wheel, tire, and axle are neglected, and the mass m represents one-fourth of the vehicle mass. The spring constant k models the elasticity of both the tire and the suspension spring. The damping constant c models the shock absorber. The equilibrium position of m when y=0 is x=0. The road surface displacement y(t) can be derived from the road surface profile and the car's speed. a) Draw free body diagram (FBD) and derive the equation of motion of m with y(t) as the input, and obtain the transfer function.
The quarter-car model of a vehicle suspension and its free body diagram are shown in Figure 1. In this simplified model, the masses of the wheel, tire, and axle are neglected, and the mass m represents one-fourth of the vehicle mass. The spring constant k models the elasticity of both the tire and the suspension spring. The damping constant c models the shock absorber. The equilibrium position of m when y=0 is x=0. The road surface displacement y(t) can be derived from the road surface profile and the car's speed. a) Draw free body diagram (FBD) and derive the equation of motion of m with y(t) as the input, and obtain the transfer function.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Question
![Task 1):
The quarter-car model of a vehicle suspension and its free body diagram are shown in
Figure 1. In this simplified model, the masses of the wheel, tire, and axle are neglected,
and the mass m represents one-fourth of the vehicle mass. The spring constant k models
the elasticity of both the tire and the suspension spring. The damping constant c models
the shock absorber. The equilibrium position of m when y=0 is x=0. The road surface
displacement y(t) can be derived from the road surface profile and the car's speed.
a) Draw free body diagram (FBD) and derive the equation of motion of m with y(t) as the
input, and obtain the transfer function.
Body
m
1
Suspension
Road
k
Datum level
Figure 1
Dynamic Analysis and Control
If assume:
m=250 kg
k=10000, 30000, 50000 N/m
c=1000, 2000, 3000 N.s/m
b) Plot magnification ratio vs frequency ratio (r=0-4) diagrams for the parameters given
above (you can draw the three curves in one diagram for three different k values and
do the same for the three c values as well).
c) Use the derived transfer function to model the system and plot the step response for
the system by Matlab or Simulink.
10100101010
101010101
133374](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5fd3309e-137c-421e-8c44-8a58be2f7dc0%2F15125159-9935-4ace-b556-bb0d22a5b7d1%2F6w8n3ig_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Task 1):
The quarter-car model of a vehicle suspension and its free body diagram are shown in
Figure 1. In this simplified model, the masses of the wheel, tire, and axle are neglected,
and the mass m represents one-fourth of the vehicle mass. The spring constant k models
the elasticity of both the tire and the suspension spring. The damping constant c models
the shock absorber. The equilibrium position of m when y=0 is x=0. The road surface
displacement y(t) can be derived from the road surface profile and the car's speed.
a) Draw free body diagram (FBD) and derive the equation of motion of m with y(t) as the
input, and obtain the transfer function.
Body
m
1
Suspension
Road
k
Datum level
Figure 1
Dynamic Analysis and Control
If assume:
m=250 kg
k=10000, 30000, 50000 N/m
c=1000, 2000, 3000 N.s/m
b) Plot magnification ratio vs frequency ratio (r=0-4) diagrams for the parameters given
above (you can draw the three curves in one diagram for three different k values and
do the same for the three c values as well).
c) Use the derived transfer function to model the system and plot the step response for
the system by Matlab or Simulink.
10100101010
101010101
133374
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