Project
AIM : To prepare a system level simulation of an all terrain vehicle.
OBJECTIVE: TO Prepare a technical report explaining the model properties & comments on the results.
ABOUT ATV: It is also known as a quad or quadricycle type vehicle. An All-Terrain motor vehicle could have three, four or even six wheels. Unlike a motorcycle, generally, the ATVs have more than two wheels. This vehicle runs on low-pressure tires. However, it has handlebars instead of wheel for controlling the steering.
In this we have four different conditions to study.
1.baja ATV model without dashboard
2. baja ATV model with dashboard
3. baja ATV model using lookup table with dashboard
Now
STUDY 1.
BAJA ATV MODEL WITHOUT DASHBOARD
In the simulink model of CVT , generic engine,signal builder, engine sensor, transmission system,vehicle body,tyres and solver configuration blocks are used as shown in figure.The CVT subsystem includes the transmision block,input and output shaft inertia and sensors.
CVT MODEL
CVT means continuously variable transmission in this transmission we will not have any traditional gears.It operates with use of cone shaped pulleys which are connected with the belts.Where one side of the pulley is fixed and other side is movable,these are actuated by a hydraullic cylinder. This cylinder can increase or decrease the space between the pulleys.
Drive pulley connected to engine and driven pulley is connected to driveshaft.
SIGNAL BUILDER
Signal builder is used to create signals for brake and throttle.
VEHICLE BODY
OUTPUT FOR BAJA ATV WITH CVT
STUDY 2
BAJA ATV MODEL WITH DASHBOARD
In this model we have used dashboard instead of signal builder. Inputs are brake input and throttle input. we have used two knobs to control the input.In this model we are using initial conditions as brake input as 0 and throttle input as 0.5.
OUTPUT FOR BAJA ATV MODEL WITH DASHBOARD
This graph explains the relation of vehicle velocity to brake and throttle inputs.
STUDY 3
BAJA ATV MODEL USING LOOKUP MODEL WITH DASHBOARD
The diff between this one to previous one is here the gear ratio input to CVT is provided by lookup table
CVT BLOCK USING LOOKUP TABLE
OUTPUT
we have discussed about different models and its outputs for vehicle speed to brake and throttle input.