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A new radiation hardened flip-flop, named low power single-phase clocked rad-hard flip flop, is proposed. The structure is based on robust differential-input latches working on a single-phase clock, which allows a reduction in the number of nodes sensitive to radiation. The proposed structure optimizes area and power and offers better performance, as compared to state-of-the-art techniques. Experimental...
This paper presents a new method for designing the weights used for development of robust controllers for a quadrotor model with parameter uncertainty. The weights alongside the controllers are developed for attitude and altitude tracking by resolving a constrained non-linear minimization problem formulated over the conventional mixed sensitivity optimization S over T method. The optimization routine...
Power system stabilizer (PSS) is extensively used to enhance the angular stability by providing damping to the generator's oscillation. An electric torque is enforced in the rotor shaft in phase with the speed variation to provide this damping. In this paper a PSO based Robust Power System Stabilizer (RPSS) design has been proposed depending upon mixed sensitivity based H output feedback control in...
Coming with the reliability enhancement and the life extension for the Photovoltaic (PV) inverters modules, diagnostic techniques will be required to derive signature identification. The reliable operation of PV inverter is very crucial to get the highest performance for the long term. A new Smart Inverter Robustness Index (SIRI) is used for verifying the performance and robustness of the grid-tied...
This paper presents a grid-side current controller for grid-tied inverters with LCL filter, including harmonic current elimination. Contrarily to previously proposed harmonic-current controllers, the presented solution offers a generalized method that gives a consistent and stable performance irrespectively of the number of current harmonics to be canceled and of the resonant frequency of the LCL...
Because of nonlinear and strong coupling features, control system of permanent magnet synchronous motor usually requires high robustness, which can be achieved by fractional-order controller with strong ability against disturbances. A tuning approach based on D-decomposition method and maximum sensitivity is proposed to design fractional-order PIλ controller for permanent magnet synchronous motor...
Numbers of samples in different classes are in nature imbalanced in many machine learning problems. Single classifier-based methods are subject to high variance. Therefore, ensemble-based methods are more suitable for dealing with imbalanced pattern classification problems. In this work, we propose a boosting-based method: BSMBoost which creates an ensemble of classifiers using samples selected by...
Decentralized control is linked to sensitivity reduction in unity feedback systems [1, 2]. It is proposed in this paper to extend this result to unstable invertible plants in order to also achieve ultrafast and robust control through a new control method. The present result is a multivariable extension of the single-input single-output case [3] which has been recently tested successfully at McGill...
Aiming at multiple-input multiple-output (MIMO) systems with multiple time delays in the process industry, all-pole approximation is proposed for different time delays in this paper. What is more, in order to reinforce the tracking performance and controller robustness in the case of uncertainty and disturbance, loop transfer recovery method at output side is proposed to realize the multiple-loops...
The paper presents a new multi-controllers approach with H∝ control applied to control a manipulator robot wrist (Staubli RX-90). A brief description of process and linear mathematical modeling of the process. Principle of multi-controllers approach of control is briefly presented. Our new proposals concerning the type of the controllers used in the multi-controller approach of control and which are...
The accurate detection of T-wave characteristic points is the basis of the morphology judging, which plays a great role in the diagnosis of heart diseases, especially in the arrhythmia diagnosis. Recently, the method based on the sliding area has received increasing interest due to its stable robustness. In this study, we aim to evaluate the performance of T-wave detection based on the sliding area...
In the paper, a new approach to the robust optimal design is proposed. The idea is to consider the sensitivity as an extra objective function which is cost-effective. The optimal design of a switched-reluctance motor is considered as the case study: since the case study exhibits two design criteria, the Pareto front trading off three objective functions is approximated by means of evolutionary computing.
In this article, a fractional filter internal model control (EMC) based proportional integral derivative (PID) controller is designed for controlling the unstable inverted pendulum system. The system is stabilized by using a compensatory function to cancel out the unstable poles and zeros in the model. Now, the controller is designed for the stabilized model producing a PID controller along with fractional...
In this paper, the problem of fault detection is addressed for networked control system (NCS) subject to both random packet dropout and multi-rate sampled data, which is usually unavoidable. Since the networked control system suffers heavy resources competition and network congestion under the limited bandwidth, resulting in multi-rate sampling and data packet dropout. Observer based residual generation...
This paper proposes a robust fault detection observer based on zonotopes for discrete-time uncertain systems with sensor faults and unknown but bounded uncertainties. The main advantage of this method is that the observer gain of the robust zonotopic observer is designed to be robust against bounded uncertainties while being sensitive to faults. In order to detect sensor faults with low magnitudes,...
In this paper, a robust repetitive control for time delay systems is investigated supporting high precision tracking of nano-manipulating systems. To handle the time delay of such systems, the repetitive control structure is reformulated and the design of q filter is converted to the mixed sensitivity optimization of infinite dimensional systems, where Skew-Toeplitz based approach is used for controller...
In this paper, a H∞ robust controller is designed for high-gain boost converter (HGBC) using mixed-sensitivity method. This controller design is based on the model, which uses a linear time-invariant approximation of nonlinear time-variant PWM converter that describes approximately the behavior of the system. The design of voltage-mode controller for boost converter is challenging, as its duty cycle...
For the non-integer order process with time-delay, a design and tuning method of two-degree-of-freedom fractional order internal model controller is proposed. This method can over the disadvantages of single-degree-of-freedom PID controller that can not achieve the best performance of the command tracking characteristic and disturbance rejection characteristic at the same time. The time-delay term...
This paper investigates the fragility (both from the stability and performance point of view) of (optimally tuned) fractional-order P(I)D controllers applied to integral processes. Indeed, the effects of the variations of the controller parameters are investigated in order to understand if the fine tuning of the controller is a critical issue. Both the set-point response and the load disturbance rejection...
Active noise control is often concerned with the strong attenuation of single or multiple tonal noise disturbances which may have unknown and time varying frequencies. Currently in applications, adaptive feed-forward compensation is used which requires the use of an additional transducer and introduces an instability risk due to a positive internal coupling. However for these types of noise a feedback...
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