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For a lightly damped flexible arm, an extra-insensitive (EI) shaper is an efficient logic to suppress the residual vibration of a flexible arm. Presently, the EI shaper is obtained approximately by a numerical solution on the assumption that damping ratio ζ and vibration tolerance Vtol are within some intervals. In this paper, we introduce a partially analytical EI shaper which is a closed form using...
Mahalanobis distance is one of the commonly used multivariate metrics for finely segregating defective devices from non-defective ones. An associated problem with this approach is the estimation of a robust mean and a covariance matrix. In the absence of such robust estimates, especially in the presence of outliers to test-response measurements, and only a sub-sample from the population is available,...
A special class of recurrent neural network (RNN) termed Zhang neural network (ZNN) has recently been proposed for time-varying matrix square roots finding. Such a ZNN model can be constructed via monotonically-increasing odd activation functions to obtain the theoretical time-varying matrix square roots in an error-free manner. Different choices of activation functions lead to different performance...
The eXplicit Control Protocol (XCP) is a promising congestion control protocol that outperforms TCP in terms of efficiency, fairness, persistent queue length, and packet loss rate. XCP quantitatively informs senders how to adjust their sending rate, and assumes that all senders will respond. However, short-lived flows are often on the order of a few segments, they may be unresponsive to XCP feedback,...
With spatial regression analysis, the cause of the hemorrhagic fever with renal syndrome (HFRS) is detected in China in 2008. The results showed that: the incidence of HFRS is influenced by six factors: latitude, longitude of regional centers, the proportion of settlement place, the proportion of grassland, average elevation, and the average precipitation in October and November. Among these factors,...
In this paper, reference model output following control method is proposed for a direct current servo system. In details, the properties of the direct current servo system are described, which shows that a fast-acting tracking performance is required in the system. As a result, right coprime factorization technique is used to guarantee the stability of the control system and command generator tracker...
In this paper, an internal model control method basing on inverse control theory is proposed to apply to a ship motion simulation bench, which suffers strong disturbances and highly nonlinearity. The nonlinear model of the bench is developed, and the internal model controller is designed by transforming the nonlinear system to a pseudo-linear system, based on the nonlinear inverse system method. At...
The method of inverse system control applied to inverted pendulum system was described in this paper. First, the method was directly used to design the strategy of inverted pendulum pseudo-linear system, and then the feasibility and shortcomings of the system were analyzed through simulating three specific models of inverted pendulum system. Secondly, to decrease the dynamic inverse error caused by...
A buck converter with a digital controller is modeled analytically and compared to laboratory measurements and simulation results. These models will help the practicing engineer in understanding the new digital controllers. This presentation provides engineers less familiar with digital control some tools and insight into how to characterize the behavior of these systems. The models are validated...
A Robust Current-Loop Controller (RCLC) based on the theory of Sliding Model Control (SMC) for Permanent Magnet Synchronous Motors (PMSMs) is proposed in this paper. The Field Oriented Control (FOC) scheme for PMSMs drive is constructed to achieve the better performance. Meanwhile in order to damp the chattering brought by the basic principle of SMC, three ways are presented, which can ensure the...
This paper introduces a robust prediction method for symbolic interval data based on the simple linear regression methodology. Each example of the data set is described by feature vector, for which each feature is an interval. Two classic robust regression models are fitted, respectively for range and mid-points of the interval values assumed by the variables in the data set. The prediction of the...
Although the popular BitTorrent protocol strives to limit free-riding via its tit-for-tat incentives, recent research efforts have shown that it does not strictly enforce fairness. Free-riding opportunities indeed exist, mainly via optimistic unchokes, a BitTorrent mechanism that facilitates the continuous discovery of better peers to interact with. Our results in this work also show that increasing...
Slander attacks represent a significant danger to distributed reputation systems. Malicious nodes may collude to lie about the reputation of a particular neighbor and cause serious damage to the overall trust evaluation system. This paper presents and analyzes a trust model robust to slander attacks in ad hoc networks. We provide nodes with a mechanism to build a trust relationship with its neighbors...
We have investigated a technique for recognising faces invariant of facial expressions. We apply multi-linear tensor algebra, which subsumes linear algebra, to analyse and recognise 3D face surfaces. This potent framework possesses a remarkable ability to deal with the shortcomings of principle component analysis in less constrained situations. A set of vector spaces can be used to represent the variation...
Rapid prototyping allows for evaluation of design product in a short period of time. Designers or CEOs may perceive the size and appearance of the product by touching the automatically constructed physical objects produced through rapid prototyping. However, it is usually impossible to change its color, texture, and user interface. In this paper, we introduce 'Augmented Reality based Re-formable Mock-up',...
This paper presents a robust fixed order H2 controller designed using Strengthened discrete optimal projection equations (SDOPEs), which approximate the first order necessary optimality condition. The novelty of this work is the application of the robust H2 controller to a micro aerial vehicle MAV, named Sarika2 developed in house. The controller is designed in discrete domain for the longitudinal...
With the event of nanoscale technologies, new physical phenomena and technological limitations are increasing the process variability and its impact on circuit yield and performances. Like combinatory cells, the sequential cells also suffer of variations, impacting their timing characteristics. Regarding the timing behaviors, setup and hold time violation probabilities are increasing. This article...
This paper describes a comparative analysis between two topologies of operational amplifiers to design a 40 MS/s 12-bit pipeline analog to digital converter (ADC). The analysis includes AC and transient simulation to select the proper topology. This ADC is implemented in a 0.35 mum AMS CMOS technology with 3.3 V single power supply. The capacitors and selected operational amplifiers were scaled for...
The dramatic increase in leakage current, coupled with the swell in process variability in nano-scaled CMOS technologies, has become a major issue for future IC design. Moreover, due to the spread of leakage power values, leakage variability cannot be neglected anymore. In this work an accurate analytic estimation and modeling methodology has been developed for logic gates leakage under statistical...
IC design is driven by two simultaneous trends: miniaturization of microelectronics technology, and telecommunication market expansion. When considered at a user level, these trends seem to be compatible: by making devices smaller, integration of a larger number of functionalities in your smart phone is made possible and thus boosts the development of the telecom market. From an IC designer point...
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