Modeling And Design Of An Active Car Suspension System Using Half Car Model

Siti Soliah, Selamat (2012) Modeling And Design Of An Active Car Suspension System Using Half Car Model. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

The purpose of this project was focused on comparison between the active suspension responses with the passive suspension response using half car model (two of four wheels). A good car suspension system could provide significant improvements in ride comfort and road handling when riding over road bumps. The road disturbances in this project will be simulated by an impulse input. As a fulfilment of this project, a controlling method needs to be selected. The controller is designing in order to improve the output responses of the system. The controller needs to be design carefully to achieve better simulation since each controller has their own method. For LQR, the value of Q and R need to be tune carefully to ensure the best performance is achieved. MATLAB software will be used in order to simulate the response of the system and SIMULINK in MATLAB is used to write the coding for the designed controller. The car suspension system is simulated by using MATLAB to obtain the ride performance under various road conditions. Simulation results will indicate the feasibility of the designed controller. The results is analyzed and discussed in order to compare the differences between active suspension and passive suspension systems. The result for this project shows that the output response for active suspension system is better than passive suspension system in term of increasing the ride comfort and improving the car handling performance where the output response has less overshoot and a settling time shorter; so that the problem occurs for passive suspension system where its vibration amplitude high and the time required to terminate the vibration is quite longer can be overcome by active car suspension system.

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