Sliding mode voltage control strategy for capturing maximum wind energy based on fuzzy logic control

Robust DC/DC converter control for polymer electrolyte membrane fuel cell application

This paper presents a simple and systematic approach to design second order sliding mode controller for buck converters. The second order sliding mode control U+0028 SOSMC U+0029 based on twisting algorithm has been implemented to control buck switch mode converter. The idea behind this strategy is to suppress chattering and maintain robustness and finite time convergence properties of the output voltage error to the equilibrium point under the load variations and parametric uncertainties. In addition, the influence of the twisting algorithm on the performance of closed-loop system is investigated and compared with other algorithms of first order sliding mode control such as adaptive sliding mode control U+0028 ASMC U+0029, nonsingular terminal sliding mode control U+0028 NTSMC U+0029. In comparative evaluation, the transient response of the output voltage with the step change in the load and the start-up response of the output voltage with the step change in the input voltage of buck converter were compared. Experimental results were obtained from a hardware setup constructed in laboratory. Finally, for all of the surveyed control methods, the theoretical considerations, numerical simulations, and experimental measurements from a laboratory prototype are compared for different operating points. It is shown that the proposed twisting method presents an improvement in steady state error and settling time of output voltage during load changes.

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Design of second order sliding mode and sliding mode algorithms: a practical insight to DC-DC buck converter

While proportional-integral-derivative (PID) control is the most applicable controller in industry, it does not provide important qualities, such as stability in case of uncertainties, being robust to disturbances, and optimal control inputs. To address the issue, this paper presents adaptive robust PID control subject to supervisory decoupled sliding mode control for an inverted pendulum system optimized by using a genetic algorithm optimization. Decoupled sliding mode control is a variable structure control method having appropriate features, such as good tracking performance and robustness with regard to disturbances. To this end, decoupled sliding mode control as a supervisory controller is utilized in accordance with PID control to deliver necessary control inputs and enhance the performance of the controller. Effectual methods such as the transfer function which resulted in having minimum chattering in the controller is employed in this paper. An adaptation mechanism is used to update the proportion...

Adaptive robust PID control subject to supervisory decoupled sliding mode control based upon genetic algorithm optimization

Display Omitted An optimal adaptive robust PID controller based on fuzzy rules and sliding modes is introduced to control MIMO uncertain chaotic nonlinear systems.Multi-objective genetic algorithm optimization is employed to ascertain the optimum parameters of the proposed controller.The proposed methodology is applied to two prominent challenging dynamic systems, i.e. a Duffing-Holmes oscillator and a robotic manipulator. In this paper, an optimal adaptive robust PID controller based on fuzzy rules and sliding modes is introduced to present a general scheme to control MIMO uncertain chaotic nonlinear systems. In this control scheme, the gains of the PID controller are updated by using an adaptive mechanism, fuzzy rules, the gradient search method, and the chain rule of differentiation in order to minimize the sliding surfaces of sliding mode control. More precisely, sliding mode control is used as a supervisory controller to provide sufficient control inputs and guarantee the stability of the control approach. To ascertain the parameters of the proposed controller and avoid trial and error, the multi-objective genetic algorithm is employed to augment the performance of proposed controller. The chaotic system of a Duffing-Holmes oscillator and an industrial robotic manipulator are the case studies to evaluate the performance of the proposed control approach. The obtained results of this study regarding both systems are compared with the outcomes of two notable studies in the literature. The results and analysis prove the efficiency of the proposed controller with regard to MIMO uncertain systems having challenging external disturbances in terms of stability, minimum tracking error and optimal control inputs.

An optimal adaptive robust PID controller subject to fuzzy rules and sliding modes for MIMO uncertain chaotic systems

A practical design sliding mode controller for DC–DC converter based on control parameters optimization using assigned poles associate to genetic algorithm

This paper is a simple and systematic approaches to the design of sliding mode controller for buck DC-DC Converters. Various aspects of the design, including the practical problems and the proposed solutions, are detailed. However, these control strategies can't compensate for large load current and input voltage variations. In this paper, a new control strategy by compromising both schemes advantages and avoiding their drawbacks is proposed, analyzed and simulated.

Sliding mode controller for buck DC-DC Converter

This paper is a simple and systematic approaches to the design and analysis a pulse width modulation (PWM) based sliding mode controller for buck DC-DC Converters. Various aspects of the design, including the practical problems and the pr oposed solutions, are detailed. However, these control strategies can 't ompensate for large load current and input voltage variations. In this paper, a new control strategy by compromising both schemes advan tages and avoiding their drawbacks is proposed, analyzed and simulated. Keywords—buck; DC/DC converters; sliding mode control, pulse width modulation

General Purpose Pulse Width Modulation Based Sliding Mode Controller for Buck DC-DC

The power system is a vital subsystem in a spacecraft As long as the spacecraft has power, it can perform its mission Almost all other failures can be worked out by ground operations from ground stations but a power loss is very fatal for the spacecraft In the early years of spaceflight, the power system was also the limiting factor in any mission duration Many studies show that solar cell power (short-circuit current and open-circuit voltage) are degraded by space environment radiation The power system is designed such that the end of life (EOL) power is adequate for the mission’s requirements Beginning of life (BOL) power is set by the estimate of the radiation damage over the spacecraft’s lifetime It is well known in the literature, the radiation damage to solar cells is caused by high-energy protons from solar flares and from trapped electrons in the Van Allen belt The purpose of this paper is to investigate the power system design trades involved in the mission analysis of a low earth orbit (LEO) satellite at an altitude of 700 km Based on the power requirements of the payload and the constant power requirements for the remainder of the spacecraft (platform subsystems), the solar arrays and batteries for the spacecraft will be sized

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Solar Arrays and Battery Power Sources Conceptual Design for Low Earth Orbit Microsatellites

Other sources of energy in space applications remain unexploited such as heat. Indeed the exchange of heat is considered generally on board spacecraft as hostile, destructive and undesirable, thereby a different means are used to reduce its effect on board spacecraft. Heat being an important source of energy, it remains badly exploited on spacecraft and its applications remain limited. We present in this paper one of the methods used to convert heat energy to electrical energy by using thermoelectric device, the goal becomes therefore to choose a device capable to give a best performances through a comparative analysis between different commercial thermoelectric generator devices to be able subsequently to make a choice of the component to be used for future design. This analysis will allow us thereafter to design a thermoelectric generator as secondary power source for small satellite by exploiting the external thermal properties of the spacecraft on orbit

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M. Bensaada

Papers

A practical design sliding mode controller for DC–DC converter based on control parameters optimization using assigned poles associate to genetic algorithm

Sliding mode controller for buck DC-DC Converter

General Purpose Pulse Width Modulation Based Sliding Mode Controller for Buck DC-DC

Solar Arrays and Battery Power Sources Conceptual Design for Low Earth Orbit Microsatellites

Comparative Analysis of Thermoelectric Generators Parameters