汽车系统动力学-操纵动力学仿真

1、Assignment 2Vehicle Handling Dynamics覃智威覃智威 116020910107116020910107张涵张涵寓寓 116020910105116020910105Vehicle system DynamicscomputermodelofmotionequationsWhere:contents Case-1: Same Angle Step Input Case-2: Same Lateral Acceleration Case-3: Root Locus Method Case-4: 4WS-Bode DiagramCase 1: Time Domain

2、-same angle step inputLateral velocity varies with timeCase 1: Time Domain-same angle step inputLateral velocity varies with timeCase 1: Time Domain-same angle step inputYaw rate varies with timeCase 1: Time Domain-same angle step inputLateral acceleration varies with timeCase 2: Time Domain-same la

3、teral accelerationIncrease Longitude Velocity, Adjusting Time changes a little while steady-state value increases a lot, so both system become more sensitive while Ux increases.Lateral velocity varies with timeCase 2: Time Domain-same lateral accelerationOvershoot of Buick increases a lot while ux i

4、ncreases, however steady-state value decreases. Yaw rate varies with timeCase 2: Time Domain-same lateral accelerationBoth of the steady-state value are 0.3g.Lateral acceleration varies with timeCase 3: System Stability Analysis-Root Locus Method Astheuincreases:Ferrari:CriticalDampingUnderdampingBu

5、ick:UnderdampingUnstableCase 4: 4 Wheel Steering Design-Bode diagramnewstate-spacefunctionswithrespecttofCase 4: 4 Wheel Steering Design-Bode diagramPhasefrequencystabilitymargin:FWS=115.54WS=94Amplitudefrequencystabilitymargin:H=+Case 4: 4 Wheel Steering Design-Bode DiagramPhasefrequencystabilitymargin:FWS=92.84WS=98.9Amplitudefrequencystabilitymargin:H=+Case 4: 4 Wheel Steering De