Modeling and Simulation of Vehicular Power Systems - webfiles its ...

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CBD Drive Cycle3530Speed (Km/h)252015105004.89.614.419.22428.833.638.443.24852.857.662.467.27276.8Time (sec)Figure 7-6 City Bus Drive cycle (CBD)The driving cycles are modeled using look-up tables and are considered as inputs for thesimulation instead of manual pushing of brake and throttle pedal.7.6 Automatic DriverTo simulate the behavior of a driver following up a certain drive cycle, a model isrequired to calculate the required wheel torque. This model is called automatic driver. Itconsists of a PI controller having the reference driving cycle, actual speed of the vehicleand grade as inputs. Its output is the reference wheel torque to trace the drive cycle. Inorder to increase the functionality of the PI controller a feed forward loop is used. Thisloop based on the reference speed and grade, calculates the traction torque needed fortracing the reference drive cycle. The error between the reference speed and the actualspeed is compensated by adding another torque calculated by the PI controller. In order toprevent integrator windup, the integrator is reset each time the speed falls down to zero.The block diagram is shown in figure 7-7.46
Figure 7-7 Automatic driver model block in Matlab/Simulink47
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AhaModeling and Simulation of Vehic
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To my parents, brother and my love
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Table of ContentsAcknowledgment....
Page 9 and 10: List of FiguresFigure 2-1: Oil cons
Page 11: List of TablesTable 3-1 List of som
Page 14 and 15: xii
Page 16 and 17: Chapter 4 discusses the dynamics of
Page 18 and 19: The Other environmental effects of
Page 20 and 21: So a modeling tool being able to de
Page 22 and 23: electric motor to provide the tract
Page 24 and 25: Figure 2-8: Configuration of a para
Page 26 and 27: Vehicle system modeling can be done
Page 28 and 29: Figure 3-2: EMTS solution flow-char
Page 30 and 31: Figure 4-2: The deflection of tyre
Page 32: V −Vwheel actualλa=( 4-9)VwheelV
Page 35 and 36: Figure 4-5 Friction coefficient cha
Page 37 and 38: The gear box consists of different
Page 39 and 40: Where• I = discharge current [amp
Page 41 and 42: decreases very rapidly. In electric
Page 43 and 44: Thus, this simulation model is capa
Page 45 and 46: VOCRchargeRdischargeSOCTempSOCQmaxT
Page 47 and 48: Figure 5-8 Battery open circuit vol
Page 49 and 50: Figure 5-11 Charging resistance ver
Page 51 and 52: 6 Engine, electric machine and cont
Page 53 and 54: 4 Idle speed 840 rpm5 Peak power 15
Page 55 and 56: 7 Modeling in Simulink/MatlabOnce t
Page 57 and 58: Figure 7-3 Vehicle dynamics block i
Page 59: 7.3 EngineAs described in Chapter 5
Page 63 and 64: 8 Simulation ResultsIn this chapter
Page 65 and 66: Peak generator torque1074 N.mPeak g
Page 67 and 68: Figure 8-5 Wheel speed and translat
Page 69 and 70: Figure 8-7 Engine and generator pow
Page 71 and 72: Figure 8-9 Battery state of charge
Page 73 and 74: 9 ConclusionRegarding the significa
Page 75 and 76: References[1] Shuo Tian, Guijun Cao
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