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This paper presented the design of a capacitive power transfer (CPT) system by implementing a Class-E inverter due to its high efficiency, which in theory can reach close to 100% performance. However, the Class-E inverter is highly sensitive to its circuit parameters under the scenario of having small capacitance at the coupling plate. As a solution, an additional capacitor can be integrated into...
This paper presents the development of a new wireless power transfer technique using capacitive coupling. Capacitive power transfer (CPT) system has been introduced as an attractive alternative to the traditional inductive coupling method. This is due to the CPT benefits of simple topology, fewer components, better EMI performance and robustness to surrounding metallic elements. In this work, a Class-E...
The power transfer efficiency and power transfer capability are the most crucial performance indicator in acoustic energy transfer (AET) applications. As overall efficiency is dependent on the power conditioning at the transmitter and receiver side, it is required to develop a high efficiency power amplifier on the transmitter side in addition with a high efficiency power processor at the receiving...
This paper presents the observer design to control and at the same time estimate the state of polynomial discrete-time systems. In general, to design observer for polynomial discrete-time system is difficult because the solution is nonconvex. More precisely, it is a nonconvex problem due to the relationship between the Lyapunov function and the observer gain is not jointly convex. Hence, it cannot...
A coupled of ultrasonic transducer can act as a power transmission device by means of Acoustic Energy Transfer (AET). This method is relatively new method of contactless energy transfer and could be an alternative to the currently established technologies for the contactless transmission of power, such as inductive power transfer (IPT) and capacitive coupled power transfer (CPT). This paper presents...
This paper discusses on attitude control of a quadcopter unmanned aerial vehicle (UAV) in real time application. The paper describes the controller design method for the hovering control of UAV automatic vertical take-off system. In order to take-off the quadcopter and stable the altitude, PID controller has been designed. The scope of study is to develop an altitude controller of the vertical take-off...
This paper presents analysis and design of Capacitive Power Transfer (CPT) technologies. The Class E MOSFET converter has been proposed in this paper to generates a high frequency AC from a DC voltage to the CPT system. The zero voltage switching is guaranteed in this work to yield a high efficiency CPT system. The experimental results confirm that the 2.00mW power can be transferred to the output.
This paper presents a general quadcopter model. To achieve this, some experimental works have been done. In particular, the reverse engineering approach is applied to find the parameters of the quadcopter system. The first experiment is to obtain the amount of force generated on the propeller via a lift force test. Then the moment of inertia is calculated through a simple test bifilar pendulum concept...
The paper presents the basic principle of Class E converter circuit, analytical expressions for circuit design, and circuit experiments' results of 1MHz operating frequency with 12V DC supply voltage. The performance of Class E converter circuit with different parameters has been investigated. Circuit experiments have been carried out to validate the analytical expressions. From the results, the proper...
In this paper, we attempt to design a filter to estimate the state of polynomial discrete-time systems. In this work, a global filter design method for polynomial discrete-time systems by using SOS-SDP based is established without any assumptions about nonlinear terms of the error dynamics. In our work, to ensure a convex solution to the filter design problem can be obtained, an integrator is incorporated...
This paper presents a loosely coupled inductive power transfer (IPT) system for low power applications. Two separated coils form an inductive power transfer through an air gap due to the magnetic coupling. The primary circuit uses a Class E converter circuit to drive the non-linear load, which theoretically produces zero switching losses. In order to ensure the magnetic flux leakage is minimized,...
This paper presents the development of push-pull power converter that applied to the Acoustic energy transfer (AET) system. The push-pull converter may operate under zero voltage switching condition at resonance frequency and capable to minimize switching losses. The attention in this paper is to produce power with optimum frequency and able to transmit energy via acoustic approach through air medium...
This paper investigates the performance of different compensation topologies of loosely coupled inductive power transfer system at 1MHz using Class E Amplifier. The capacitor compensation technique is regularly used in inductive power transfer to solve the problem of large leakage inductance and get the maximum power transfer when reach the resonant inductive coupling. In this paper, the analysis...
This paper investigates the problem of disturbance attenuation for a class of uncertain polynomial discrete-time systems with an H∞ performance. In general, this is a difficult problem because it cannot be formulated as a convex problem. This is because the Lyapunov function and the control input is not jointly convex. Hence it cannot be solved by a semidefinite programming (SDP). In this paper, a...
This paper examines the problem of designing a nonlinear robust state feedback controller for uncertain polynomial discrete-time systems. In general, this is a challenging controller design problem due to the fact that the relation between Lyapunov function and the control input is not jointly convex, hence, this problem cannot be solved by a semidefinite programming (SDP). In this paper, a novel...
This paper investigates the problem of designing a nonlinear feedback controller for a class of polynomial discretetime systems with norm-bounded uncertainties. The objective of a controller design is to achieve robust stabilization and a prescribed level of H∞ performance simultaneously. In general, designing a controller for polynomial discrete-time systems is not a trivial problem. This is due...
The design of a robust nonlinear H∞ static output feedback controller for parameter dependent polynomial systems is a hard problem. This paper presents a computational relaxation in form of an iterative design approach. The proposed controller guarantees the L2-gain of the mapping from exogenous input noise to the controlled output is less than or equal to a prescribed value. The sufficient conditions...
An iterative approach for the design of a nonlinear H∞ static output feedback controller for polynomial systems is presented in this paper. The proposed controller guarantees the L2-gain of the mapping from exogenous input noise to the controlled output is less than or equal to a prescribed value. The sufficient conditions for the existence of nonlinear H∞ static output feedback controller are given...
This paper examines the problem of designing a nonlinear static output feedback controller for uncertain polynomial systems via an iterative sums of squares approach. The derivation of the static output feedback controller is given in terms of the solvability conditions of state dependent bilinear matrix inequalities (BMIs). An iterative algorithm based on the sum of squares (SOS) decomposition is...
This paper presents an iterative sum of squares approach for designing a nonlinear static output feedback control for polynomial systems. In this work, the problem of designing a nonlinear static output feedback controller is converted into solvability conditions of polynomial matrix inequalities. An iterative algorithm based on the sum of squares decomposition technique is proposed to resolve the...
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