Simulation of Motor Bike Simulation of Motor Bike Suspension SystemSuspension System

ME 270ME 270Advanced Computer Aided Design of Dynamic SystemAdvanced Computer Aided Design of Dynamic System

Guided By: Professor Jose J. GrandaGuided By: Professor Jose J. GrandaDepartment Of Mechanical EngineeringDepartment Of Mechanical EngineeringCalifornia State University, SacramentoCalifornia State University, Sacramento

Prepared By:Prepared By:

NISHITH SHAHNISHITH SHAH

VAMSHI KRISHNA REDDY VAMSHI KRISHNA REDDY CHADACHADA

ObjectivesObjectives The displacement of human body, front and rear shock absorbers , The displacement of human body, front and rear shock absorbers ,

force acting on the human body and velocity of the human body force acting on the human body and velocity of the human body when he rides the motor bike at a speed of 50 m/sec on a plain when he rides the motor bike at a speed of 50 m/sec on a plain road.road.

The displacement of human body, front and rear shock absorbers, The displacement of human body, front and rear shock absorbers, force acting on the human body and velocity of the human body force acting on the human body and velocity of the human body when he rides the motor bike at a speed of 50 m/sec and the front when he rides the motor bike at a speed of 50 m/sec and the front wheel is on the bump and rear wheel on the plain road.wheel is on the bump and rear wheel on the plain road.

The displacement of human body, front and rear shock absorbers The displacement of human body, front and rear shock absorbers and force acting on the human body and velocity of the human and force acting on the human body and velocity of the human body when he rides the motor bike at a speed of 50 m/sec and the body when he rides the motor bike at a speed of 50 m/sec and the rear wheel on the bump and front wheel on the plain road.rear wheel on the bump and front wheel on the plain road.

INITIAL CONDITIONSINITIAL CONDITIONS

In order to find out our objectives we consider initial In order to find out our objectives we consider initial design conditions of motor bike suspension system. Those design conditions of motor bike suspension system. Those are as fallows.are as fallows.

Mass of the motorbike = 100kgsMass of the motorbike = 100kgs Mass of the rider = 80kgsMass of the rider = 80kgs Mass of the wheels (front & rear) = 20kgsMass of the wheels (front & rear) = 20kgs Spring constant of strut (front & rear) = k = 1 x 104 N/mSpring constant of strut (front & rear) = k = 1 x 104 N/m Damping resistance of the shock absorber (front & rear) Damping resistance of the shock absorber (front & rear) =500 N-s/m=500 N-s/m

The shock absorbing capacity of the tire = 2 N/mThe shock absorbing capacity of the tire = 2 N/m

ProcedureProcedure

The initial step is to draw the bond graph of the The initial step is to draw the bond graph of the motor bike suspension system in the CAMP-G motor bike suspension system in the CAMP-G software.software.

Then the bond graph drawn should be Then the bond graph drawn should be interfaced with the MATLAB.interfaced with the MATLAB.

The values of initial design conditions of the The values of initial design conditions of the motor bike suspension system are to be placed motor bike suspension system are to be placed in the campg.mod file. in the campg.mod file.

Then different conditions has to given in the Then different conditions has to given in the campg.mod file to get our project objectives as campg.mod file to get our project objectives as follows.follows.

Then we have to run the MATLAB file and we get Then we have to run the MATLAB file and we get the different simulations for different conditions.the different simulations for different conditions.

When we run the MATLAB file we get three When we run the MATLAB file we get three graphs for each problem which can be seen in graphs for each problem which can be seen in another file which we are submitting.another file which we are submitting.

From these graphs we can know the From these graphs we can know the displacement ,force and velocity acting upon the displacement ,force and velocity acting upon the human body and displacement of the shock human body and displacement of the shock absorbers both front and rear.absorbers both front and rear.

The graphs are as fallowsThe graphs are as fallows

GRAPH 1

GRAPH 2

GRAPH 3

GRAPH 4

GRAPH 5

CONCLUSIONCONCLUSION

The maximum displacement of human body, front absorber The maximum displacement of human body, front absorber and rear absorber when motorbike running with 50m/sec is and rear absorber when motorbike running with 50m/sec is 0.5meters, 5 meters and 5 meters respectively and force 0.5meters, 5 meters and 5 meters respectively and force acting on the human body is 5 N and velocity is 0.8 m/sec. But acting on the human body is 5 N and velocity is 0.8 m/sec. But when the front wheel is on the dump then the maximum when the front wheel is on the dump then the maximum displacement of human body, front and rear absorber at same displacement of human body, front and rear absorber at same speed are 0.25m, 0.019m andspeed are 0.25m, 0.019m and

-0.019m and force acting on the human body is 2.5 N and -0.019m and force acting on the human body is 2.5 N and velocity of the human body is 0.4m/sec.And when the back velocity of the human body is 0.4m/sec.And when the back wheel is on the dump then the maximum displacement of wheel is on the dump then the maximum displacement of human body, front and rear absorber at same speed are human body, front and rear absorber at same speed are 0.2m,-0.012m and 0.012m and force acting on the human 0.2m,-0.012m and 0.012m and force acting on the human body is 2.2 N and velocity is 0.4m/sec.Thus we conclude our body is 2.2 N and velocity is 0.4m/sec.Thus we conclude our project report that at different speed and different road project report that at different speed and different road conditions the displacement of human body, shock absorbers , conditions the displacement of human body, shock absorbers , force acting on the human body and velocity of the human force acting on the human body and velocity of the human body varies which should be within the design standards.body varies which should be within the design standards.