Vol 7, No 1 (2016) > Mechanical Engineering >

Reducing the Vibrations of an Unbalanced Rotary Engine by Active Force Control

M. Mohebbi, M. Hashemi

 

Abstract: In this article, the
Active Force Control (AFC) method is implemented for reducing the vibrations
that are caused by an unbalanced rotary engine. By using Matlab Simulink, the
dynamic model of an unbalanced rotary engine was simulated. Then a Proportional–Integral–Derivative PID
controller with the AFC loop was added. The obtained simulation results proved
that when the PID controller was operating without the AFC loop, the vibrations
were reduced but with very less efficiency when compared to the case in which the AFC loop was engaged with
the PID controller. This means that the amplitude of vibrations was
extremely reduced when the PID controller was equipped with the AFC loop, and
the same results were observed for the frequency domain case. The robustness of
the AFC method was also tested and again the method of AFC was very capable in
reducing the vibrations.
Keywords: Active Force Control; PID; Unbalanced rotary engine; Vibrations

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