The document outlines the vehicle dynamics work being done by Team Triumphant Racers. It discusses developing an efficient suspension configuration with reliable steering geometry and wheel alignment for better traction and high acceleration performance. It then provides details on the specific double wishbone suspension design with adjustable arms and dampers being implemented at both the front and rear. Key parameters and considerations related to the car's mass, track widths, wheelbase, weight distribution, and more are also listed.

1. Team Members:
- Shreeraj Kurkure (4626)
Team Name:- Triumphant Racers

2. 1. VEHICLE DYNAMICS

3.  Develop most efficient Suspension configuration.
 Reliable Steering geometry.
 Wheel Alignment – Better Traction.
 High Acceleration Performance.
 Identify relevant design parameters – Load Transfer.
 Real-time Simulation.
 Manufacturabilty & Simplicity.
 Driver Comfort.
 Maintain easy adjustability for further tuning.
 LAP Concept.

4.  Minimum 60” wheel base
 Unequal front & rear track widths
 Minimum 1” ground clearance
 Minimum 2” total suspension travel
 Template must pass through frame
 Spherical bearings must be in double shear
 Design must handle applied loading
 Rate of camber angle change with respect to
both body roll and wheel displacement

5.  Double Wishbone with 4-wheel Independence.
 Unequal, Non-parallel Control Arms.
 Length Adjustablilty.
- Threaded Chassis Mounts.
 Camber Adjustabilty.
- Aluminium shims.
 Anti-Roll Bars.
 Push-rod actuated Dual-Shock Monotube Dampers at
Front.
 Pull-rod actuated Mono-Shock Monotube Damper at Rear.
 No REIB.

6.  Considerations:-
1. Car Total Mass = 300kg (with 68kg driver)
2. Track Width (F/R) = 1260/1160 mm
3. Wheelbase = 1680 mm
4. Total Mass Distribution = 48% (Front) 52% (Rear)
5. Natural Frequency = 2 (F)/2.2 (R) Hz
6. Tire Rate = 90000N/m
7. Tire Deformation at Max. Load Transfer = 6mm
8. Rim Size = 13 inches
9. Lateral Acceleration = 1.5g
10. Total Mass CG Height = 275mm

7. Step-1: Determination of CG and Static Loading
 Unsprung Mass (Wheel Assembly+Tires+A-arms):-
Front = 10.5kg per wheel
Rear = 11.75kg per wheel
 Sprung Mass:-
Suspension Assembly = 11.3kg
Steering Assembly = 6kg
Pedal Assembly = 8kg
Engine+Gearbox+Drivetrain = 80kg
Chassis+Seat+Bodyworks = 68kg
 Total Car Mass = 300kg (with 68kg driver)

8.  Total Mass CG Co-ordinates:-
From Front Axle = 873.6 mm
From Rear Axle = 806.4 mm
Height from ground = 275mm

9. Step-2: Front View Swing Arm Length and Roll Center
Location
Roll Center height:-
Front = 38.4mm above ground
Rear = 66mm above ground

10. Step-3 : Estimation of Rates
 Motion Ratio(F/R) = 1.4/1.2
 Ride Rate(F/R) = 19423.38N/m / 25317.5N/m
 Wheel Rate(F/R) = 24738.23N/m / 36331.34N/m
 Spring Rate(F/R) = 12637.186N/m / 24535.92N/m
 Roll Stiffness:-
1. Due to Tires(F/R) = 1426.57N/roll / 1056.31N/roll
2. Due to Springs(F/R) = 451 N/roll / 758 N/roll
 Max Body Roll Angle = 2.35degrees

13.  Control Arms

14.  Push Rod  Rocker
 Sway Bar

15. Suspension System – Front Assembly

16.  Dynamic Camber Change
 Load Transfer along 3 axes
 Damper & ARB Effectiveness
 Jounce & Rebound
 Body Roll
 Total Damping Offered

17. Strain gauge and accelerometer data logged
during driving
 Mychron 3 data logger
with internal Accelerometer
 Strain gauges