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Sliding mode controllers are known to be robust to parameter changes and capable of rejecting disturbances. Most sliding mode controllers were implemented on aircraft models that were derived based on the aircraft's body axes. The aircraft model in this paper are derived from an energy based modeling technique where the aircraft dynamics can be defined by Euler-Lagrangian equations that makes decoupling...
This paper addresses a method of modeling hysteresis of a class of smart structures generated by both varying input current and mechanical loads on account of effective application in trajectory tracking with a precision under sub-micron level. The proposed hysteresis model is a modification of the classical Preisach operator by introducing the dependence of the density function on the stress. The...
Visually guided assembly of micro MEMS parts with high magnification is limited by small field of view (FOV). To overcome this problem, zoom lens system is usually adopted, which causes size change of the parts in the image space. Micro MEMS parts have several arbitrary planar shapes because of the fabrication process, so that contour to be described by control point can be suitable image feature...
This paper studies the best achievable tracking performance of multiple-input multiple-output (MIMO), finite dimensional, linear and time-invariant (FDLTI) system over a additive white noise (AWN) channel in the feedback path. The plant under consideration is assumed to be minimum phase but unstable. The reference input is a vector valued wide-sense stationary (WSS) random process. The power of the...
This paper investigates the problem of robust Hinfin control for Markovian jump systems with polytopic uncertain parameters and mode-dependent distributed delays. In terms of linear matrix inequalities, a sufficient condition for robust stochastic stability is proposed. A state feedback controller is designed such that the closed-loop system is stochastically stable and a prescribed Hinfin performance...
It is known that the PID controller is ill-suited to handle time-delay processes, especially in applications with stringent control objectives to be met. For such purposes, deadtime compensators may be used. But such controllers still face resistance towards actual industrial applications due to their difficulties in implementation and realisation. In this paper, a PID solution involving setpoint...
This paper investigates the problem of global robust stabilization by state feedback, for a family of high order feedforward (upper-triangular) nonlinear systems with delayed input. The uncertain nonlinearities are assumed to satisfy a polynomial growth assumption with a constant growth rate. The designed controllers, which are continuous but not smooth feedbacks, could achieve global asymptotical...
In this paper, a state feedback gain synthesis method for achieving alpha-stability of uncertain linear time-delay systems is proposed. By properly incorporating the system dynamics, the derived gain synthesis conditions are totally LMI-based and easy to apply. Examples are given to show the effectiveness of the proposed method.
In this paper we consider the problem of delay-dependent exponential stability of linear continuous-time systems with time-varying delays in the presence of impulsive perturbations. We combine the Lyapunov function and Razumikhin-type techniques together to derive new delay-dependent sufficient conditions in the form of linear matrix inequalities (LMIs) for exponential stability of linear systems...
For uncertain time delay systems with mismatch disturbances, this paper presented an integral sliding mode control algorithm using output information only. The proposed control algorithm can improve the synthesis problem in past researches and avoid solving a large LMI. An integral sliding surface is comprised of output signals and an auxiliary full-order compensator. The designed output feedback...
Hairs are important components to human. So, to create virtual human we must create hair material models and simulate hair's motion so that it is similar to real hairs. Alternatively, hairs are complicated objects, because each human has about from 200.000 to 400.000 stands of hairs, so simulating is very complex. Furthermore, it is difficult to simulate hairs according to real time and ensure speed...
In this paper, the skew by data dependent gate loading has been analysized. A method based on the concept of MOS parametric capacitance has been proposed. According to different data dependent of the MOS transistor, including transient channel charge and Miller effects, the values of capacitance in different data loadings have been extracted. Two clock tree routes have been analyzed by using the gate...
A model reduction method to match the coefficient of the transfer function G(s) of descriptor system is presented to obtain reduced order descriptor system. By projecting G(s) to the transfer function of discrete time system, the model reduction problem for the descriptor system is transformed to Markov parameters matching model reduction problem of the corresponding discrete time normal systems....
The replenishment plan of complex automatic picking system(CAPS) determines the efficiency of picking and whether the picking can be operated smoothl1y, which is not only highly related to the pallet storage area and picking buffer but also the operation and operating efficiency of Horizontal Dispenser (HD) and Channel Dispenser(CD). The questions here can be summarized as when replenishment should...
In this paper, the application of the classifier system to human support of hot strip mill operation and making decision rules by the classifier system are described. The rule base for the correction of operation and the judgment of performance are necessary for the system that becomes agent of the human expert. The method to extract correction rules by a classifier system is shown. To search appropriate...
Continuous-time Delta-Sigma modulators are able to operate at higher frequencies than their discrete-time counterparts. However, they suffer more severely from non-idealities such as clock jitter. A method for measuring this clock jitter has been proposed. Moreover, the effect of the non-ideality are explained and a continuous-time to discrete-time conversion method is presented in order to aid in...
Delay co-ordinate feedback (DCF) control may be used to attain periodic oscillations in systems exhibiting low dimensional chaos when measurements of only a single variable are available. This can be achieved by reconstructing the chaotic attractor using time delayed measurements of the variable. In this paper, a modification to the DCF algorithm (2D-DCF) that takes into account sampling rate limitations...
In this paper, a hybrid control strategy, variable universe adaptive fuzzy sliding mode control, is proposed to realize the chaos synchronization of two gap junction coupled FitzHugh-Nagumo (FHN) neurons under external electrical stimulation. According to the Lyapunov stability theory, the stability of the closed error system is guaranteed. The control scheme is robust to the uncertainties such as...
A novel synchronization criteria for coupled 2-Lorenz chaos system is developed. Besides, the variant synchronization orbits of coupled 2-Lorenz chaos system are initially determined and studied based on coupling strength, Rayleigh parameter and out-coupling parameter. The simulations further illustrate the analysis results proposed in this note.
In this paper, a hybrid control strategy, variable universe adaptive fuzzy sliding mode control, is proposed to realize the synchronization of two chaotic gyros in master-slave configuration. According to the Lyapunov stability theory, the stability of the closed-loop error system is guaranteed. The adaptive control scheme is robust to the system uncertainties and external disturbances. Chaos synchronization...
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