Project

• Aim: To carry out  system level simulation of an all-terrain vehicle using simulink.

• Objective: To prepare a technical report on BAJA ATV explaining model properties for following:

- Without using lookup table.

- Using lookup table.

# Part 1:

#Without using lookup table:

• Without Dashboard:

• Blocks used in model:

- Signal Builder Block: Signal builder allows you to create interchangeable groups of piecewise linear signal sources and use them in the model. 

- Generic Engine: Generic Engine block represents a general internal combustion engine. This block is a suitable generic engine for spark-ignition and disel.

 -Ideal Rotatinal Motion Sensor: 

- The ideal rotational motion sensor block represents an ideal mechanical rotational motion sensor, that is, a device that converts an across variable measured between two mechanical rotational nodes into a control signal proportional to an angular velocity or angle. you can specify the initial position as a block parameter. The sensor is ideal since it does not account for inertia, friction, delays, energy consumption, and so on.  

• Continuously Variable Transmission:  

- A continuosly variable transmission is an automatic transmission that can chnage seamlessly through a continuous range of gear ratios. This contrasts with other transmission that provide a limited number of gear ratios in fixed steps.

-CVT Subsytem:

• 
• Simple Gear:

Represents a fixed ratio or gearbox. No inertia or compliance is modeled in this block. You can optionally include gear meshing and viscous bearing losses.

• Variable Ratio Transmission: 

Represents a variable ratio gearbox such as implemented by mechanical belt CVT, electric, or hydraulic transmission. The physical signal input defines the ratio of input to output angular shaft velocities. 

• Inertia: The block represents an ideal mechanical rotational inertia. The block has one mechanical rotational conserving port. The block positive direction is from its port to reference point.
• Vehicle Body:

•  Represents a two-axel vehicle body in logitudinal motion. The block accounts for body mass, aerodynamic drag, road incline, and weight distribution between axels due to acceleration and road profile.The vehicle can have a same or different number of wheel 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 Subsystem:

•  Torque vs Speed characteristics:

• Scope Output:

• CVT Ratio:

• CVT Shaft Speed:

•  

• Engine Speed:

# With Dashboard: The block in the dashboard library help you control and visualize your model during simulation and while simulation is paused.

• Simulink Model: 

• CVT Ratio:

• Engine Torque Speed Curve:

• Engine RPM:

• Scope output:

• Shaft Speed:

 

# Using Lookup Table:

- Lookup Table: A lookup table uses a array of data to map input values to output values, approximating a mathematical function.

• Simulink Model: 

 

• Lookup Table: