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                                   Simulation of BAJA-ATV (All-terrain vehicle) by using Simulink.

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ATV: All-terrain vehicle

ATV is also known as light utility vehicle/ a quad bike or simply a quad as defined by a ANSI.

ATVs are able to travel on all terrains than most other vehicles. Although it a legal vehicle in some countries. Some companies defined that ATVs are intended to use by only one operator even though some companies produce ATVs where two persons can travel on it.

Low pressure tiers are used on ATVs so that it can travel on all terrains without any slip.

Simulink block used in this simulation are:

Signal builder:

Signal builder is used to feed the input values with respect to time.

The input values may be anything which should take time as an another parameter.

Scope:

Scope is used to plot the output data which we feed in to the model.

Go to:

 Go to is the Simulink block is used to take the inputs globally/locally.

From:

From is the Simulink block is used to take the inputs only from the go to block, and transfer the values to the required Simulink block which helps in further simulation.

Solver configuration:

Solver configuration block is used to solve the mathematical relations in order to perform the simulation. Solver configuration is the block only connected to the physical system.

PS- Simulink converter:

This is used to transfer the data from physical simscape blocks to the Simulink blocks.

Simscape blocks:

The below listed models are physical simscape blocks which has properties like real world models.

Generic Engine

Vehicle body

Tires

RPM sensors

Inertia

Variable Rpm Sensors

Variable gear ratio

BAJA-ATV simulation:

In this project the mathematical model of the ATVs is created by using the MATLAB “Simulink”. The above listed blocks are connected in a sequence so that where we can obtain the results on variable rpm.

In this simulation throttle and break input are given as an input to the model.

Input Parameters:

Speed vector and throttle vectors are the two inputs which are feed in to the generic engine by simply giving variable name.

The above shown image is a spread sheet with values of speed and torque vector.

The parameters of inertia are can change in order to know the performance of the CVT gears.

Results of Simulation:

The above image is the output of current simulation.

The above parameters like velocity, throttle, brake input and distance are taken with respect to time.

The velocity and distance are totally depending on inputs which we have given, in this throttle and brake input are the inputs.

From the relations like speed=distance/time.

If the speed of the vehicle is increases automatically the distance traveled by the vehicle increases.

Throttle and brake input:

The brake input is given “0” through out the process with respect to time.

Throttle value is maintained 0.5 up to 20 sec later it is changed to 1 for the next 80 sec. this change in throttle makes the rapid increase in the velocity, this change in velocity can be seen from the above image.

The above shown rpm can change by changing the mass 1 and mass 2 which are listed in the generic engine.

The mass and 2 can change from the workspace it self.

Conclusion:

Simulation of BAJA-ATV is done by using MATLAB “Simulink”.