2 research outputs found
On Continuous Full-Order Integral-Terminal Sliding Mode Control with Unknown Apriori Bound on Uncertainty
This study aims at providing a solution to the problem of designing a
continuous and finite-time control for a class of nonlinear systems in the
presence of matched uncertainty with an unknown apriori bound. First, we
propose a Full-Order Integral-Terminal Sliding Manifold (FOITSM) with a
conventional (discontinuous) sliding mode to show that it provides the combined
attributes of the nonsingular terminal and integral sliding mode algorithms.
Secondly, an Adaptive Disturbance Observer (ADO) has been designed to alleviate
the effect of the uncertainty acting on the system. On application of the
ADO-based Full-Order Integral-Terminal Sliding Mode Control (FOITSMC), the
chattering phenomenon in control input has been reduced substantially in the
presence of conditionally known matched disturbances. Moreover, the adaptive
gains of ADO are updated non-monotonically without over-bounding the acting
disturbance, yet sustain the global boundedness of state trajectories within a
specific bound. %Finally, an application of the proposed algorithm for attitude
stabilization of a rigid spacecraft has been successively shown.Comment: 14 pages, 9 figure
A new chaotic oscillator containing generalised memristor, single op-amp and RLC with chaos suppression and an application for the random number generation
In this paper, a new chaotic oscillator consists of a single op-amp, two capacitors, one resistor, one inductor, and memristive diode bridge cascaded with an inductor is proposed. The proposed chaotic oscillator has a line of equilibria. In the new oscillator circuit, negative feedback, i.e. inverting terminal of the op-amp is used, and the non-inverting terminal is grounded. The new oscillator has chaotic, periodic, quasi-periodic behaviours, as seen from the Lyapunov spectrum plots. Some more theoretical and numerical tools are used to present the dynamical behaviours of the new oscillator like bifurcation diagram, phase plot. Further, a non-singular terminal sliding mode control (N-TSMC) is designed for the suppression of the chaotic states of the new oscillator. An application of the new oscillator is shown by designing a chaos-based random number generator. Raspberry Pi 3 is used for the realisation of the random number generator