Oscillators

Oscillator is a system that shows a variation periodical in time. Oscillators are mostly used in traditional mechanics and in electricity. Oscillators can be divided into several types according to their operation and their effects, like free oscillator, forced oscillator, self-sustained oscillator, quasi-sinusoidal oscillator, oscillator of relieving. The free oscillator is a system undergoing one force that tends to bring back it towards a position of balance around of which it oscillates. It is the case of one pendulum oscillating under the effect of gravity. The forced oscillator is a free oscillator to which one adds one force oscillating. A swing is one when one balances his feet in order to make it accelerate. Indeed, this swinging constitutes an additional force which, adapted at the speed of the swing, can make assemble this one more and more high. The self-sustained oscillator uses a source of continuous energy, and produces a periodic variation. One meets two types of them, but this distinction is not always clear. When the periodic variation of a self-sustained oscillator approaches one sinusoid, it is said that it is quasi-sinusoidal. That corresponds to a filter of very good quality. That is why a sinusoid is observed. Whenever the quality of this filter is not also good, this sinusoid can become deformed. If the system passes periodically from one state well defined to another, that it is one oscillator of relieving. That can be obtained with a quasi-sinusoidal oscillator to which we provide a very high profit which will saturate the sinusoid very quickly. This one takes the form then of crenels, which corresponds well in the passing of a state to another periodically.

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