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ABSTRACT
The project deals with the nonlinear system of Bus Suspension system. The
state-feedback controller and lead/lag controller will be designed in order to control the
system. Control theory of determining the stability will be used as to design an
extremely good controller. State-space theory will be used in order to create the
mathematical modeling of the system and also to design the SFC. The simulation is
using the Matlab-Simulink: software. \Vhen the suspension system is designed, a 1/4 bus
model (one of the four wheels) is used to simplify the problem to a one dimensional
spring-damper system. When the bus is experiencing any road disturbance (i.e. pot
holes, cracks, and uneven pavement), the bus body should not have large oscillations,
and the oscillations should dissipate quickly. The problem is how long the system will
dissipate the vibration. The system that we have to built should be having the shortest
time and also have the ability to absorb all the bumping. The system which has the best
dissipated time will give the best suspension to make sure the bus stable. There are four
main objectives in this project which are to determine the transfer function in s domain
and state-space representation of the bus suspension system with the disturbance, to
design the Lead/Lag controller and State Feedback Controller to give the smoothest
handling for the bus suspension system and lastly is to carry-out the simulation works
of both controllers when applied to the system using graph and animation for
comparison purpose. In designing process, firstly the mathematical model will be
determined and the mathematical model will be linearise to design the controller. After
linearise process, these two controller mentioned above will be designed and in the end
of the semester, the comparisons of these controllers was performed when applied to
bus suspension system under matlab-simulink platform with graph and animation using
