Project
STUDY 1
AIM:To prepare a techinical report of simulation for Baja all terrain vehicle (ATV).
OBJECTIVE:Carry out a system-level simulation of an all-terrain vehicle and prepare a technical report explaining the model properties & comments on the results.
ALL TERRAIN VEHICLE
An all-terrain vehicle (ATV) is defined as a motorized off-highway vehicle designed to travel on four low-pressure or air less tires, having a seat designed to be straddled by the operator and handlebars for steering control.
MODEL FOR BAJA ALL-TERRAIN VEHICLE
MAJOR SIMSCAPE BLOCK USED IN THE MODEL
CVT-Continuously Variable Transmission
A continuously variable transmission (CVT) is an automatic transmission that can change seamlessly through a continuous range of gear ratios. This contrasts with other transmissions that provide a limited number of gear ratios in fixed steps. The flexibility of a CVT with suitable control may allow the engine to operate at a constant RPM, while the vehicle moves at varying speeds.
The most common type of CVT uses two pulleys(primary and secondary) connected by a belt or chain.
SIMSCAPE MODEL FOR CVT:
SIMSCAPE MODEL FOR VEHICLE BODY:
GENERIC ENGINE:
The Generic Engine block represents a general internal combustion engine. This block is a suitable generic engine for spark-ignition and diesel. Speed-power and speed-torque parameterizations are provided. A throttle physical signal input specifies the normalized engine torque. Optional dynamic parameters include crankshaft inertia and response time lag. A physical signal port outputs the engine fuel consumption rate based on the fuel consumption model that you choose. Optional speed and redline controllers prevent engine stall and enable cruise control.
VARIABLE RATIO TRANSMISSION:
The Variable Ratio Transmission block represents a gearbox that dynamically transfers motion and torque between the two connected driveshaft axes, the base and the follower.
INPUT SIGNALS
In signal builder block contains brake and throttle input.
CVT Gear ratio
Engine speed:
OUTPUT
From the graph according to the input,the output of Break,velocity,throttle and distance can be analyse.
CVT-Primary and secondary speed.
MODEL FOR BAJA ATV WITH CVT USING DASHBOARD
OUTPUT FOR DASHBOARD
CVT SPEED
STUDY 2
MODEL FOR BAJA ATV WITH CVT USING LOOKUP TABLE
ENGINE RPM
OUTPUT
CVT PRIMARY & SECONDARY
MODEL FOR BAJA ATV WITH CVT USING LOOKUP TABLE
OUTPUT
CVT PRIMERY & SECONDARY
CONCLUSION
Thus the model for BAJA-ATV & CTV using Lookup table have been observed and analysized successfully.