sustained oscillation

sustained oscillation

[sə′stānd ‚äs·ə′lā·shən]
(control systems)
Continued oscillation due to insufficient attenuation in the feedback path.
(physics)
Oscillation in which forces outside the system, but controlled by the system, maintain a periodic oscillation of the system at a period or frequency that is nearly the natural period of the system.
References in periodicals archive ?
While necessary to avoid sustained oscillation, controlling EMI in GaN designs calls for a level of design precision and techniques not commonly used in the power electronics industry today.
However, the machining force does not go back to 0 N immediately and performs a sustained oscillation, decreasing from around 3N to 1N, which indicates that the machining operation is still conducting.
The present researches on natural network or synthetic networks all proved that feedback loops play an important role in maintaining cellular homeostasis, producing bistability, multistability, sustained oscillation, and birhythmicity [24], and making critical decisions such as cell fate and cell development decisions.
Having been shown to produce sustained oscillations in neural networks, such regulatory structure is reminiscent of recurrent cyclic inhibition [2].
It is clear that the uncompensated system approaches a constant value after the damping process and the compensated system can maintain a sustained oscillation with a constant frequency and amplitude, which have proved the effectiveness and superiority of our design.
The simulation results showed that the compensated system can maintain a sustained oscillation with a constant frequency and amplitude.
For instance, abundance of predators interacting in the food web associated with the pest species or the effects of weather, rainfall, and temperature (e.g., [2]) may lead to a sustained oscillation in the pest population.
Sustained oscillations with a time period much less than one day are most likely caused by the nonlinearities in the system or improper controller tuning.
This causes excessive control action and the sustained oscillations in the discharge air temperature.
where [delta]--logarithmic dimensionless decrement of oscillations; [[omega].sub.0]--circular natural frequency of sustained oscillations of the cutting tool, 1/s.
The natural frequency of sustained oscillations is determined by the natural frequency of bending vibrations and dimensionless damping coefficient:
The value of r at the transition from stability to instability, that is, damped to sustained oscillations, depends on the degree of density dependence: the exact relationship is easily calculated using standard linearization techniques (Edelstein-Keshet 1988, Murray 1989).

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