Vibration Control Implementation in a Braking System

Abstract

The spring mass damper can be built or represented on the computer instead of going to the workshop to fabricate such system and its performance under various conditions can also be observed without having to subject the real system to these conditions hence, you save materials and money, since the system can be used countless times. Energy is also saved because such system is more easily built on a computer than physically. Moreover, it may be very difficult to measure some outputs of some systems such as displacement but such values can be measured with ease through simulation. In this thesis, a novel approach to reduce the effect of negative damping that causes brake noise is proposed by applying an Active Force Control (AFC) based strategy to a single degree-of-freedom as well as two degree-of-freedom model of a disk brake system. At first, the disc brake model is simulated and analyzed using a closed loop pure PID controller. Later, it is integrated with AFC and simulated under similar operating environment. After it is integrated with Fuzzy +AFC and simulate under the similar operating environment. After running several tests with different sets of operating and loading conditions, the results both in time and frequency domains show that the PID controller with AFC is much more effective in reducing the vibration and noise, compared to the pure PID controller alone and Fuzzy +AFC is more effective in reducing the vibration and noise as compared to PID controller with AFC.