Project
Aim:- To prepare a technicale report of simultion of BAJA All Terrain(ATV) under diffrent condition.
objective:-
carry out a system level simulation an of all terrain vehicle prepare a technicale report explaining the model properties & comments on the results.
All terrain vehicle:
An all- terrain vehicle is defined as a motorised off highway vvehicle design to trevel on four low pressue or non pneumatic tires , having a seat designed to be sttrabled by the operator and handel bar for steering operator .
Simulink model for BAJA ATV wih CVT:-
Mazor component in the model :-
Continuously - Variable Transmission drive (CVT):
It is better to more gear in a transmission , since it can optimise engine speed in a variety of driving condition that mean low gear can provide better acceleration while high gear can maximize fuel economy ,CVTs differ traditional automatic trasmission in that they dont have gear that provide step better speed operation speed instead the mazority of work them a pair of variable diameter , cone shape pully connected by a steel or composite belt the halves of each pully designed with the point of end cone touching , these form a v- shape groove in which connecting belt rides.one side pully is fixed , and the other side is moveable , actuated by a hydruallic cylender . the cylender can increase and decrease the amount of space between two ride of pulley,this allow the belt to ride lower orhigher along the wall of pulley .Depending on drive conditions,there by changing the ''gear '' ratio.
CVT model:-
Variable transmission ratio:-
Representing a variable ratio gear box such as implemented by mechanical belt CVT, electric, or hydraulic transmission . the physical signal input r define the ratio of input to output angular shaft velocity.
Connecting B(base) and F(follower) are mechanical rotational conserving port.specify the relation between base and follower rotation direction with the output shaft rotate parameter.
Input signal:-
A signal builder to used to create a input signal for for brake and throttale.
Vehicle body:-
Gear box Velocity:-
shaft speed:-
here it is clear that how velocity speed drasticaly when break is 0, and reach 40km/h in 5 sec. and as apply break point 0 to 0.4 then speed decrease drastically according to my observation.