Project

AIM:

To study the system level simulation on All terrain vehicle.

OBJECTIVE:

1.study the baja ATV model with and without dashboard,also with and without lookup table.

EXPLANATION:

TRANSMISSION:

The mechanism by which power created by the engine is transferred to the driving wheels.

Types of transmission:

In this study we use Continuously Variable transmission,it provides more usable power, better fuel economy and a smoother driving experience than the automatic transmission system.

1.CVT model:

In this simulink model , there are two subsystems CVT, and vehicle body . There is a signal builder hich gives the brake input and throttle input. These inputs are given to the Generic engine which is then given to the Engine sensor to measure the rpm.

In the CVT subsystem, it consists of input shaft inertia, output shaft inertia ,variable ratio gear and ideal rotational motion sensors. The gear acts as a transmission between the CVT and the Vehicle body.

In the vehicle body subsytem,it consists of four wheels connected to the vehicle body, and a double shoe brake is connected to the rear wheels.

OUTPUT:

It shows the relationship between the throttle (speed),brake, velacoty and the distance covered. The rpm of the primary and secondary engine also shown .

Here we set the throttle input as 0.5 throughout the simulation .so the velocity keeps constant over a certain period of time.

RPM:

2.CVTMODEL_DASHBOARD:

The dashboard is used to control the brake input and throttle input.If we change the knob of the throttle , the velocity and rpm will increase.

3.CTV WITH MAPPED:

In this model, the cvt ratio is given as the lookup table. A look up table is an array of data that maps input valuea to the output.

The following diagram shows the CVT ratio given as the lookup table.

This input is given to the CVT subsystem as a lookup table.

This is the output for the given CVT ratio ,as the thottle input raises the velocity also raises.

4.CVT MAPPED WITH DASHBOARD:

The dashboard is used to control the brake input and throttle input.If we change the knob of the throttle , the velocity and rpm will increase.

CONCLUSION:

Thus the system level simulation of an ALL Terrain vehicle has been done.