The number of DOF of the kinematic pairs is controlled periodically from 0 to 3, exploiting the dependence of frictional forces on the oscillation in the contact zone of links.
As the catalyst elements are exposed to various airborne substances during normal plant operation their function is controlled periodically by testing selected catalyst sheets in a specially designed device.
Recently, an intermittent control scheme with fixed both control period and control width, namely periodically intermittent control scheme, has been developed to study the synchronization problem for chaotic systems as well as dynamical networks; see [12, 13, 28 43] and references cited therein.
In a periodically intermittent control, every control period consists of two parts: 'work time' for operative control and 'rest time' for inoperative control, which provides a spectrum of possibilities between the extremes of continuous-time and discrete-time control.
Then the new adaptive controller updates the parameters and the control signal periodically in a pointwise between two consecutive spatial cycles.
In the case that both the control periods and the control widths are fixed, i.e., (t_{l+1}-t_{l}equiv mathrm{T}) and (delta_{l}equiv delta), for all (lin mathbb{N}^), where T and δ are two positive constants, then the control type becomes the adaptive periodically intermittent control, which has been investigated in [39 41].
It is noted that both the control periods and the control widths in our adaptive intermittent control strategy are allowed to be nonidentical, which extends the scope of application of periodically intermittent control with fixed both control period and control width employed widely in previous works.
We also propose a nonlinear model predictive controller (NMPC) to control the periodically-forced DWOs.
Strange attractors and chaos control in periodically forced complex Duffing's oscillators.
First, in order to develop the guaranteed cost control, a periodically alternate adaptive rule is designed.
