Project

AIM:-

To prepare a technical report for BAJA ALL-TERRAIN VEHICLE ATV model Without using Lookup Table and Using Look UP Table.

OBJECTIVE:-

Carry out the system-level simulation of an BAJA ALL Terrian vehicle and prepare the technical report explaining the model properties of Without i=using lookup table and using a lookup table and comments the result.

EXPLANATION:-

BAJA ALL-TERRAIN VEHICLE (ATV) MODEL

All-Terrain Vehicles (ATV) are among the most useful land vehicles ever invented. Designed to combat the hazards of different kinds of terrain, they can be used in almost every worksite there is. not only do they make traveling easier for drivers, they are also safe to use when transporting load or cargo. suspension and chassis play a vital to;e in the structural performance of an off-road vehicle.

COMPONENT OOF A BAJA ALL-TERRAIN VEHICLE (ATV):-

THE MAIN COMPONENT ARE USED IN BAJA ALL-TERRAIN VEHICLE (ATV) ARE GIVEN BELOW

• VEHICLE BODY
• SUSPENSION
• TIRE
• ENGINE
• CONTINUOUSLY VARIABLE TRANSMISSION (CVT)

CONTINUOUSLY VARIABLE TRANSMISSION (CVT):

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

STUDY 1:-

CASE 1:

SIMULINK MODEL FOR BAJA ALL TERRIAN VEHICLE WITH CVT:-

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 fist 20 sec, after 20sec throttle input value becomes 1,

Generic Engine:-

Represent a system-level model of spark-ignition and diesel and engines suitable for use at the initial stages of modeling when only the basic parameters are available. optional idle speed and red line controllers are included.

connection F and B are mechanical rotational conserving portS associated with the Engine crankshaft and engine block, respectively. connection rates are reported.

TorqueVector and speed vector value is already assigned in the MATLAB program in an array data set.

ENGINE SENSOR:-

Engine sensor is connected with a Generic engine. Engine Sensor contains Ideal Mechanical rotational Sensor that converts an across variable measured between two mechanical rotational nodes into a control signal proportional to angular velocity or angle.

connection R and C are mechanical rotational conserving ports and connections W and A are physical signal output ports for velocity and angular displacement, respectively.

SIMPLE GEAR:-

Engine is connecting CVT with Simple Gear ratio for speed reduction.

CONTINUOUSLY VARIABLE TRANSMISSION:-

The main components of Continuously Variable Transmission (CVT) are given below:

BELOW:

- Primary Pulley

- Secondary Pulley

- Variator

- Belt

NOTE 1: If Variator of Primary Pulley goes outward and secondary pulley goes inward it will leads to Speed reduction.

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NOTE 2: If Variator of Primary Pulley goes inward and secondary pulley goes outward it will leads to overdrive

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CVT RATIO:-

CVT Ratio block is connected with CVT by giving random ratio values to get the value of velocity for those random CVT ratios.

Velocity Body:-

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.

vehicle body contains two front wheel and rear wheel which is connected with inertia output shaft and Double brake.

CASE 2:-

SIMULINK MODEL FOR BAJA ALL-TERRAIN VEHICLE WITH CVT USING DASHBOARD:

In the above Simulink Model, RPM(SPEED) gauge, Brake input gauge, throttle input gauge, and velocity gauge are connected in the dashboard. Brake input is 0, Throttle input is 0.3 for the initial condition to run the simulation.

Dashboard is connected with BAJA ALL terrain vehicle using CVT in Simulink Model. With the help of the dashboard, variation of speed and velocity will display in the RPM:1 gauge and velocity gauge, while running the simulation.

RPM gauge refers to the speed of the primary and secondary Pulley and velocity gauge refers to the speed of the vehicle.

STUDY -2 :

CASE -1 :

SIMULINK MODEL FOR BAJA ALL-TERRAIN VEHICLE WITH CVT (USING LOOKUP TABLE )

In the above model LookUP table data has been assigned as input to the CVT instead of giving CVT ratio. For Giving input of LookUp Table by creating a program in the MATLAB and data has been assigned as input to the CVT.

WORKSPACE:-

Look Up Table Data has been assigned as CVT_ratio in the workspace.

GIVING INPUT TO CVT USING LOOKUP TABLE:

After creating lookup table data, give the data as input to the CVT.

CASE -2:-

SIMULINK MODEL FOR BAJA ALL-TERRAIN VEHICLE WITH CVT USING DASHBOARD (USING LOOKUP TABLE):

In the above Simulink Model, RPM(SPEED) gauge, Brake input gauge, throttle input gauge, and velocity gauge are connected in the dashboard. Brake input is 0, Throttle input is 0.3 for initial condition to run the simulation.

In the above model LookUP table data has been assigned as input to the CVT instead of giving CVT ratio. For Giving input of LookUp Table by creating a program in the MATLAB and data has been assigned as input to the CVT.

#RESULT

STUDY -1:

CASE 1:

PLOT ENGINE TORQUE - SPEED CURVE:

In the above plot Maximum Velocity Reaches at 3840 RPM. Vehicle speed depends in CVT ratio.

VEHICLE SPEED PLOT:

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 and it reaches the maximum velocity.

CVT SHAFT SPEED PLOT:

In Continuously Variable Transmission (CVT) Variator of Primary Pulley goes inward and Secondary Pulley goes outward it will leads to overdrive. Primary Pulley radius increases and Secondary Pulley radius decreases. so speed of Primary Pulley is Greater than Secondary Pulley.

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ENGINE SPEED:

In the above Plot, Brake input is 0 and throttle input is 0.3 for 20 sec, Engine Speed will decrease at the beginning because of increasing gear ratio which increases the torque, and by increasing the throttle input value to 1, the Engine Speed value will increase and it reaches the maximum speed.

CASE -2:

In Initial Condition RPM:1 gauge shows 0 RPM ad velocity gauge shows 0km/hr.

Giving time value as "inf" and run the simulation. while simulation is running, throttle input value and Brake input Value can change in throttle input gauge and Brake input gauge in the dashboard and will analyze the variation of RPM and Velocity in the RPM gauge and velocity gauge.

VEHICLE SPEED PLOT

From the above vehicle Speed Plot, observed that by increasing the throttle input value it will increase the velocity and by brake input value it will decrease the velocity.

CVT SHAFT SPEED PLOT

From the above CVT shaft Speed PLot, Observed that increasing the throttle input value, it will increase the RPM of the Primary & secondary Pulley and by increasing the brake input value it will decrease the RPM of the Primary & secondary Pulley.

ENGINE SPEED

From the above Engine, Speed Plot observed that increasing the throttle input value will increase the Engine Speed and by increasing the brake input value it will decrease the Engine Speed.

STUDY - 2:

CASE -1:

LOOKUP TABLE VISUALIZATION PLOT:

CVT RATIO PLOT (LOOKUP TABLE DATA)

The above PLot shows the value of LookUP table input data given to the CVT

VEHICLE SPEED PLOT

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 to 1, then velocity will increase and it reaches the maximum velocity.

CVT SHAF SPEED PLOT:

In Continuously variable transmission (CVT) Variator o Primary Pulley goes Inward and Secondary goes outward it will leads to Overdrive. Primary Pully Radius Increase and secondary Pully radius decrease So Speed of Primary Pully is Greater than secondary Pully.

Rp>Rs

ENGINE SPEED

In the above Plot, Brake input is 0 and throttle input is 0.3 for 20 sec, engine Speed will decrease at the beginning 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.

CASE -2

CVT RATIO PLOT (LOOKUP TABLE DATA)

In the above Plot, the CVT Ratio will vary by changing the throttle gauge. If throttle value increases CVT ratio decrease if throttle value decreases CVT ratio increase.

VEHICLE SPEED PLOT

From the above Vehicle, Speed Plot observed that by increasing the throttle input value it will increase the value and by increasing the brake input value it will decrease the velocity.

CVT SHAFT SPEED PLOT

From the above CVT shaft Speed PLot, Observed that increasing the throttle input value, it will increase the RPM of the Primary & secondary Pulley and by increasing the brake input value it will decrease the RPM of the Primary & secondary Pulley.

ENGINE SPEED PLOT

From the above Engine, Speed Plot observed that increasing the throttle input value will increase the Engine Speed and by increasing the brake input value it will decrease the Engine Speed.

CONCLUSION:-

System-level simulation of an BAJA ALL-TERRAIN Vehicle Without Using Look UP Table and Using Look Up Table has been carried out and technical report for the model has been prepared and output results are plotted.