Project

Aim :

To Prepare a Technical report for BAJA All Terrain Vehicle ATV Model Without Using Look Up Table and Using Look Up Table.

Objective :

=> Carry out the System level Simulation of an BAJA All terrain vehicle and prepare the technical report explaining the model properties of Without Using Look Up Table and Using Look Up Table and Comments the results.

Block Diagram Of Baja ATV Model

=> In the Above Simulink Model, RPM(Speed) gauge,Brake Input gauge,Throttle Input gauge and Velocity gauge is Connected in the dash board.

=> Brake input is 0, Throttle input is 0.3 for Initial Condition to run the Simulation.
=> Dashboard is connected with BAJA All terrain Vechicle using CVT in Simulink Model. With the help of Dashboard, variation of Speed and Velocity will display in the RPM:1 gauge and Velocity gauge, while running the Simulation.
=> RPM gauge refers the Speed of the Primary & Secondary Pulley and Velocity gauge refers the Speed of the Vehicle.

Input Signal Builder :

=> Signal Builder is used for giving input values of Brake Input and Throttle input and it is connected with Generic Engine Block.
Where,
- Brake Input = 0,
- Throttle Input = 0.3 for first 20 sec, after 20 sec throttle input.

Vehicle Speed:

=> In the above Plot, Brake Input is 0 and Throttle Input is 0.3 for 20 sec Velocity will reach 20 and bY increasing the Throttle input value to 1, then velocity value will increase and it reaches the maximum velocity.

Vehicle Modeling Engine:

=> In the above plot Maximum Velocity reaches at 3840 RPM. Vehicle Speed is depends on CVT Ratio.

Torque & Speed Vector:

=> TorqueVector and SpeedVector Value is already assigned in the MATLAB porgram in a array data set.

Continously Veriable Transmission(CVT):

=> A continuously variable transmission (CVT), also known as a shiftless transmission, stepless transmission, pulley transmission, or, in case of motorcycles, a 'twist-and-go', is an automatic transmission that can change seamlessly through a continuous range of effective gear ratios.

=> This contrasts with other mechanical transmissions that offer a fixed number of gear ratios. The flexibility of a CVT with suitable control may allow the input shaft to maintain a constant angular velocity even as the output speed varies.

Cvt Ratio:

=> CVT Ratio Block is connected with CVT by giving random ratio values to get the value of velocity for those random CVT ratio.

Input To Cvt Using Look Up Table:

=> After creating Look Up Table data, give the data as input to the CVT.

Vehicle Body:

Components Of A Baja All Terrain Vehicle(ATV):

=> The Main components are used in BAJA All Terrain Vehicle (ATV) are given below:
- Vehicle Body
- Suspension
- Tire
- Engine
- Continously Variable Transmission (CVT)

=> Vehicle Body contains Two Front wheel and Two Rear Wheel which is connected with Inertia Output Shaft and Double Shoe
Brake.

Internal Block:

=> Represents a two-axle vehicle body in longitudinal motion. The block accounts for body mass, aerodynamic drag, road incline, and weight distribution between axles due to acceleration and road profile.

=> The vehicle can have the same or a different number of wheels on each axle. Optionally include pitch and suspension dynamics or additional variable mass and inertia. The vehicle does not move vertically relative to the ground.

Look Up Table Program in Matlab :

Look up Table Visualization:

Cvt Ratio (Look Up Table):

=> The above plot shows the value of Look Up Table input data given to the CVT.

Engine Speed:

=> In the above Plot, Brake Input is 0 and Throttle Input is 0 for 20 sec , Engine Speed will decrease at the begining because of increasing gear ratio which increases.

=> The torque and by increasing the Throttle input value to 1, then Engine Speed value will increase and it reaches the maximum Speed.

Cvt Shaft Speed: