Experimental Implementation of New Sliding Mode Control Law applied To a DC–DC Boost Converter

This paper addresses the problem of regulating the output voltage of a DC-DC buck-boost converter feeding a constant power load, which is a problem of current practical interest. Designing a stabilising controller is theoretically challenging because its average model is a bilinear second order system that, due to the presence of the constant power load, is non-minimum phase with respect to both states. Moreover, to design a high-performance controller, the knowledge of the extracted load power, which is difficult to measure in industrial applications, is required. In this paper, an adaptive interconnection and damping assignment passivity-based control-that incorporates the immersion and invariance parameter estimator for the load power-is proposed to solve the problem. Some detailed simulations are provided to validate the transient behaviour of the proposed controller and compare it with the performance of a classical PD scheme.

Section: Introductionmentioning

confidence: 99%

An Adaptive Passivity‐Based Controller of a Buck‐Boost Converter with a Constant Power Load

Ortega

Machado

et al. 2018

“…For boost converter V out > V in and hence (23) and (26) are easily satisfied by appropriate selection of k 1 and k 2 .…”

Section: Stability Of the Controllermentioning

confidence: 99%

Fixed frequency sliding mode control of renewable energy resources in DC micro grid

Yasin

Ashraf

Bhatti

et al. 2019

The rising cost of fossil fuels, their high depleting rate and issues regarding environmental pollution have brought the attention of the researchers towards renewable energy technologies. Different renewable energy resources like wind turbines, fuel cells and solar cells are connected to DC micro grid through controllable power electronic converters. In presence of these diverse generation units, robust controllers are required to ensure good power quality and to regulate grid voltage. This paper presents a sliding mode control based methodology to address the above mentioned challenges. The proposed technique keeps the switching frequency constant so that electromagnetic compatibility (EMC) issues can be solved with conventional filter design. Parallel operation of converter in DC micro gird is considered. Chattering reduction and power quality improvement by harmonic cancellation is proposed. A scaled down hardware for unregulated 11.5 V to 17.5 V input and 24V output is designed and tested.The experimental results show good performance of the controller under different loads and uncertain input voltage conditions. Moreover, the results show the robustness of the closed loop system to sudden variations in load conditions. Furthermore, a significant improvement in power quality is achieved by harmonic cancellation of chattering in the output of the converters.

“…Accordingly, Equations (8) and (9) are the translational dynamic and rotational dynamic of the quadrotor UAV, respectively [22].…”

Section: Dynamic Modelmentioning

confidence: 99%

Design of Fractional‐Order Backstepping Sliding Mode Control for Quadrotor UAV

Shi

Cheng

Yin

et al. 2018

This paper derives a nonlinear translational and rotational dynamic model of the quadrotor UAV. An original fractional-order backstepping sliding mode control method for a typical quadrotor UAV is presented. The new approach can decrease the chattering phenomenon and increase the robustness of control strategy. The strongly coupled characteristics of the under-actuated system are sought by the virtual controllers. The feasibility for different track trajectories are verified using MATLAB. The new control method can not only track the expected trajectory very well but also has a better robustness for different complex trajectory under disturbances, as the simulation results demonstrate.