Vehicle Dynamics (Lecture 4-1) - ## 전산설계자동화 실험실 ##...
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김 성수 Longitudinal Dynamics Vehicle Dynamics (Lecture 4-1)
Transcript of Vehicle Dynamics (Lecture 4-1) - ## 전산설계자동화 실험실 ##...
김 성수
Longitudinal Dynamics
Vehicle Dynamics (Lecture 4-1)
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Vehicle Performance
qLongitudinal dynamics model
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Longitudinal Dynamics Model
qModeling assumptions
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qEQM for longitudinal dynamics model
Longitudinal Dynamics Model
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qEQM for longitudinal dynamics model
Longitudinal Dynamics Model
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qEQM for longitudinal dynamics model
Longitudinal Dynamics Model
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B
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qEQM for longitudinal dynamics model
Longitudinal Dynamics Model
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qStatic Equilibrium axle force
Longitudinal Dynamics Model
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qStatic Equilibrium axle force
Longitudinal Dynamics Model
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qLow speed acceleration (저속 영역에서 가속)
Longitudinal Dynamics Model
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qLoads on Grades (경사에 따른 부하)
Longitudinal Dynamics Model
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q Acceleration performance (가속성능)
Longitudinal Dynamics Model
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q Power limited acceleration/Engine characteristics
Longitudinal Dynamics Model
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Power limited acceleration
Longitudinal Dynamics Model
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특정 HP의 엔진이 특정 속도에서 낼 수 있는 최대가속도- 가속능력은 속도에 반비례한다. 즉 차량의 속도가 증가할 수록가속능력은 감소한다.
Longitudinal Dynamics Model
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Power to weight ratio가 승용차는 40lb인 반면 상용차는 250lb로 매우낮다. 따라서 상용차의 가속성능이 승용차에 비해 매우 낮다.
Longitudinal Dynamics Model
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Longitudinal Dynamics Model
q Power Train
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Longitudinal Dynamics Model
q Power Train
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Longitudinal Dynamics Model
q Power Train
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Longitudinal Dynamics Model
q Power Train
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Longitudinal Dynamics Model
q Power Train
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Longitudinal Dynamics Model
q Power Train
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Longitudinal Dynamics Model
q 가속 저항
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Longitudinal Dynamics Model
q 가속저항
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Longitudinal Dynamics Model
q 가속저항
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Longitudinal Dynamics Model
q 가속저항
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Longitudinal Dynamics Model
q 가속저항
Generalized longitudinal equations of motion
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Longitudinal Dynamics Model
q Aerodynamic Drag (공기저항)
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Longitudinal Dynamics Model
q 등반저항
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Longitudinal Dynamics Model
q Rolling resistance (구름저항)• Tire axis system
SAE system ISO system
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Longitudinal Dynamics Model
q Rolling resistance (구름저항)• Tire Radii
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Longitudinal Dynamics Model
q Rolling resistance (구름저항)• Tire Radii
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Longitudinal Dynamics Model
q Rolling resistance (구름저항)• Tire Radii
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Longitudinal Dynamics Model
q Rolling resistance (구름저항)• Rolling resistance force (longitudinal force in a free rolling tire)
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Longitudinal Dynamics Model
q Generation of force in a braked tire
Slip ration for braking
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Longitudinal Dynamics Model
q Braking force vs slip ratio
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Longitudinal Dynamics Model
q Effect of road contamination
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Longitudinal Dynamics Model
q Generation of force in a driven tire
Slip ration for driving
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Longitudinal Dynamics Model
q 가속저항
Generalized longitudinal equations of motion
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Longitudinal Dynamics Model
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Longitudinal Dynamics Model
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Longitudinal Dynamics Model
q c
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Longitudinal Dynamics Model
q Driving
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Longitudinal Dynamics Model
q c
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Longitudinal Dynamics Model
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Longitudinal Dynamics Model
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Longitudinal Dynamics Model
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Longitudinal Dynamics Model
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Longitudinal Dynamics Model
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Longitudinal Dynamics Model
q Braking
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Longitudinal Dynamics Model
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Longitudinal Dynamics Model
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Longitudinal Dynamics Model
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Longitudinal Dynamics Model
q Braking distance
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Longitudinal Dynamics Model
q Braking distance
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Longitudinal Dynamics Model
q Braking distance
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Longitudinal Dynamics Model
q Braking distance
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Longitudinal Dynamics Model
q Braking distance 총제동거리
총제동거리 간이식
총제동시간
총제동시간 간이식
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Longitudinal Dynamics Model
q Braking distance 총제동거리
총제동거리 간이식
총제동시간
총제동시간 간이식
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Longitudinal Dynamics Model
q Braking distance 총제동거리
총제동거리 간이식
총제동시간
총제동시간 간이식
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Longitudinal Dynamics Model
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Longitudinal Vehicle Simulator
q Flow Chart of simulator
Brake pedal angle
Project 1: Longitudinal vehicle simulator- Define necessary equations for each
blocks- Define data flow diagram- Using Simulink or Matlab create a
simulator- Necessary data will be given
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Longitudinal Dynamics Model
q Slip calculation
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Longitudinal Dynamics Model
q Slip calculation
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Longitudinal Dynamics Model
q Slip calculation (zero speed condition) - method 1
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Longitudinal Dynamics Model
q Slip calculation (zero speed condition) - method 2
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Longitudinal Dynamics Model
q Slip calculation
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Longitudinal Dynamics Model
q Longitudinal force calculation (LMS virtual motion tire)
