Papers by Keyword: Second-Order System

Abstract: The Forward Switch mode power supply is good selection for power supplies of Unmanned Aerial Vehicle (UAV). Compared with the conventional forward converter, there is one auxiliary switch in the active clamp forward converter to recycle the energy stored in the transformer leakage in order to minimize the voltage stress of the main switch. The power system is designed and the operation characteristics of the active switching power supply are revealed by analysis a typical second-order system in this paper. Active Clamp Forward Converter reduce the generation of EMI, the EMC of UAV equipment is greatly improved. The results of the analysis are verified by SPICE simulation.

Abstract: Based on studying Active Disturbance Rejection Control(ADRC)technology, with MATLAB / SIMULINK as simulation platform, a simple second order system as a controlled object, Specifically discussed the establishment of system module using simulink model.By the way of designing system functions for dynamic algorithms such as Tracking Differentiator and Extended State Observer, Not only can change the system parameters and simulation results can be observed after parameters changed, the simulation process becomes simple and effective. And the relationship between parameters of ADRC and the plant dynamic characteristics are analyzed when the parameters are changed, where some principles for parameters tuning of ADRC and effective applications are provided. Finally, Through simulation examples shows that the method is practical and effective.

Abstract: A new sliding mode controller design approach for second-order systems is proposed that varies the switching surface in a nonlinear continuous time-varying fashion. The sliding mode control system, which the slope and intercept of switching surface changes continuously, can improve the system performance in terms of a eliminating in the reaching time process, robustness to parameters uncertainties and disturbance. The computer simulation results show the validity of the method.

Abstract: This paper analyzes the working principle of the electromagnetic damper and proves the characteristic of linear damping. Basing on the characteristic, a method of controlling the magnetic damping is proposed that the oscillating time can be reduced by using the sectional damping coefficients in second-order oscillating system. Using Matlab, the results of decreasing time are compared under the sectional damping consisting of two-segment or more segment with various coefficients.

Abstract: The problem of output feedback for the unstable discrete-time linear systems with input amplitude constraints is studied. Based on the precise description of controllable region, the typical implementation method of observer-based output feedback will decrease the system’s controllable region, a new approach is proposed in this paper, which make the system’s controllable domain as big as possible. Finally, two illustrative examples and simulation results are given to demonstrate the effectiveness of the proposed method.

Abstract: This paper analyses the transient response of second-order system through time domain analysis, root locus and frequency domain analysis, meanwhile, studies the influence exerted to the system by the second-order system damping ratio and the coefficient ratio as well as the research and damping ratio associated with the relevant parameters, like delay time, rise time, peak time, overshoot, time regulation, basing on the unit step response, and the stability of the system is studied by root locus. Finally, graphics are built through the application of Matlab in order to have an intuitive understanding of the impact on the performance of the system.