Fuzzy logic based vibration control of a single degree of freedom system

In this work vibrations of a single degree of freedom spring mass damper system are controlled using fuzzy logic. Firstly, fuzzy logic based negative velocity feedback is used. Velocity is fuzzified into 3 sets and force is also fuzzified into 3 sets. Need for having central set `Z´ around origin is discussed. Thereafter simulations are done so as to understand effect of size of base of `Z´ for velocity as well as for force and effect of replacing right angled fuzzy sets with isosceles fuzzy sets. Finally, one fuzzy logic based active vibration controller is developed which is based upon displacement and velocity of single degree of freedom system.