c d e x x 6 3 5x l 8

... discontinuous discrete time setting Asymptotic stability includes the desired properties of the NMPC closed loop described earlier: whenever we are already close to the reference equilibrium we want ... the real closed-loop behavior This issue will be treated in Sects 8. 5 8. 9  16 Discrete Time and Sampled Data Systems 2.2 Sampled Data Systems Most models of real life processes in technical and ... general nonlinear systems, we have decided to include such problems and examples, because nonlinear problems hardly ever admit analytical solutions, which are needed in order to solve problems or...

Ngày tải lên: 11/06/2014, 08:23

... develop less conservative ultimate bounds for neuroadaptive controllers as compared to ultimate bounds derived using classical boundedness and ultimate boundedness notions Specifically, consider ... online adaptive control because of their parallel processing flexibility and adaptability In this paper, we extend the results of to develop a neuroadaptive control framework for discrete-time ... and compartmental uncertain dynamical systems to achieve set-point regulation in the nonnegative orthant Specifically, consider the controlled discrete-time nonlinear uncertain dynamical system...

Ngày tải lên: 22/06/2014, 11:20

... diff´rentielle lin´aire du second ordre, Comptes Rendus Math´ e e e e matique Acad´ mie des Sciences paris 1 28 ( 189 9), 910–9 13 e , Sur une ´quation transcendente et les ´quations diff´rentielles ... already mentioned, stability of the canonical system means boundedness on Z of all its solutions We deduce in our case that the multipliers have to be located on the unit circle and be simple ... famous “tra c rules”; these rules are valid ı in the discrete-time case also [14, 23] and in the present case when there are only two multipliers, these rules are particularly simple [ 26] Let first...

Ngày tải lên: 23/06/2014, 00:20

... be desirable, but unfortunately these indexes are not routinely saved Nevertheless, the functional length of productive life could be modelled even better if they are added in the model Genetic ... survival data (discrete survival time) models introduced by Prentice and Gloeckler [7] can be used Grouped data models have been used in beef cattle [8] , rabbits [9] and dairy cattle to evaluate fertility ... performance of grouped data models was comparable to continuous time models Based on these results and because grouped data models reflect better the economical needs in meat animals, we conclude that...

Ngày tải lên: 14/08/2014, 13:21

... many well developed methods are not directly applied in discrete-time, due to fundament difference between differential and difference equations for modeling continuous-time and discrete-time systems, ... be applied in discrete-time, especially when the systems to be controlled are nonlinear Discrete-time systems are described by difference equations, which in great contrast to the differential equations ... much more difficult, since we cannot decide the direction along which the control operates Moveover, in discrete-time adaptive control the control directions are usually required to avoid controller...

Ngày tải lên: 14/09/2015, 08:39

... degree-days (HDD and CDD, respectively) were calculated (base temperatures 10÷20 C and 20÷ 28 C, respectively) for both cities The total number of heating degree-days for a month was calculated ... and 19 93- 2002, and of the twenty year period 19 83 - 2002 as well It is clearly seen that the monthly as well as the yearly values of HDD were reduced in the second decade, while the monthly and ... of the model residential building for Thessaloniki, calculated with degree-day data of the 19 83 - 1992 and 19 93- 2002 decades Period Thermal energy, Qht [kWhtherm] Electric energy, Qce [kWhel] Primary...

Ngày tải lên: 05/09/2013, 16:10

... uncertainty equals zero, the discrete-time state feedback mixed QGC/H ∞ control problem reduces to the discrete-time state feedback mixed LQR/H ∞ control problem Xu (2011) presented respec‐ Stochastic ... we define the discrete-time state feedback stochastic mixed LQR/H ∞ control problem as follows: Discrete-time state feedback stochastic mixed LQR/H ∞ control problem: Given the linear discrete-time ... sufficient conditions for the existence of all state feedback suboptimal LQR controllers Untill now, the technique of finding all state feedback controllers by Geromel & Peres (1 985 ) has been extended...

Ngày tải lên: 14/02/2014, 09:20

Ngày tải lên: 06/03/2014, 17:20

... particle filters, EKF are all model-dependent Hence, for a real-time problem with available hardware speed and storage; the DF, particle filters, and EKF (if applicable) should all be tested by ... m-dimensional Euclidean space An approximate discrete random vector wd is, in general, numerically, offline-calculated, stored and then used for estimation The possible values of wd are denoted ... model-dependent The most commonly used recursive nonlinear estimation approaches are the extended Kalman filter (EKF) and particle filters The EKF linearizes nonlinear models by Taylor series expansion...

Ngày tải lên: 20/06/2014, 01:20

... performance of the proposed predictors is studied on examples in Section Finally, concluding remarks are presented in Section Statement of problem – centralized predictor We consider a linear system described ... are computed tk tk only once, since they not depend on the leads Δ Therefore, FLP is deemed more complex than PFF, especially for large leads Remark (Real-time implementation): We may note that ... Illustrative example In this section, we present a numerical example in order to valid the proposed results Consider an example of an instable system under the form (1) described by the following parameters...

Ngày tải lên: 20/06/2014, 01:20

... provide a better error covariance However, this scheme requires the use of more complex sensors Most of the available research work is concerned with the expected value of the EC, neglecting higher ... system’s parameters and network delivery rates affect the EC, permits a better system design, where the trade-off between conflicting interests must be evaluated Studies on how to compute the expected ... Control Conference: ECC’ 93, Groningen, Holland, pp 2 266 –2270 Hou, M & Müller, P C (1994) Disturbance decoupled observer design: a unified viewpoint, IEEE Trans Automatic Control, Vol 39 , No 6, pp 133 8 134 1...

Ngày tải lên: 20/06/2014, 01:20

... the enhanced predictor presented here provides a less conservative design, with lower upper bound and lower experimental value of the error variance Conclusions This chapter presented how to design ... intermittently sampled according to an independent sequence of binary random variables We derived lower and upper bounds for the CDF of the EC, as well as for the EEC These bounds can be made arbitrarily ... Ghaoui & Clafiore (2001) The advances of technology lead to smaller and more sensible components The degradation of these component became more often and remarkable Also, the number and complexity...

Ngày tải lên: 20/06/2014, 01:20

... the method of MFCS will be extended to descriptor system in discrete time, and the effectiveness of the method will be verified by numerical simulation Expressions of the problem The controlled ... ones to decide the state feedback gains and the ones to decide the filter gains These solutions of two types of coupled Riccati difference equations can be obtained independently i .e. , the separation ... stochastic switching systems, and verified the effectiveness of the design theory by numerical examples In order to solve the output feedback problems, we have introduced the LMMSE filters adapted to...

Ngày tải lên: 20/06/2014, 01:20

... the well known discrete time bounded real lamma In Section 3, we define the discrete time state feedback mixed LQR/ H ∞ control problem Based on this definition, we present the both Riccati equation ... for the design All the presented approaches can be extended to some other problems Note that we cannot conclude that the approaches presented in this paper is definitely superior to all the existing ... reduced-order observer can be designed to meet the requirements of full-state feedback, it does introduce extra dynamics, which increases the complexity of the design This naturally motivates the employment...

Ngày tải lên: 20/06/2014, 01:20

... admissible nonfragile controller for solving the non-fragile discrete-time state feedback mixed LQR/ H ∞ control problem, we define the following parameter-dependent discrete time Riccati equation: ... Bernhard (1991) The relations among the two related problem and mixed LQR/ H ∞ control problem can be clearly explained by based on the discrete time reference system (9) (3) The standard H ∞ control ... The following theorem gives the solution to non-fragile discrete time state feedback mixed LQR/ H ∞ control problem Theorem 4.1 There exists a non-fragile discrete time state feedback mixed LQR/...

Ngày tải lên: 20/06/2014, 01:20

... well developed methods in discrete-time systems, due to the fundamental difference between differential and difference equations for modeling continuous-time and discrete-time systems, respectively ... are implemented digitally and consequently discrete-time systems have been receiving ever increasing attention However, as to the development of nonlinear adaptive control methods, which are generally ... fault-tolerant controller and normal controller are illustrated in Figure 1, and for normal case and the actuator faults case respectively It can be concluded that the poles of closed-loop system driven...

Ngày tải lên: 20/06/2014, 01:20

... allowed to exist in the model, which may add the difficulty of decentralized adaptive control problem In this chapter, we will discuss several concrete examples of designing decentralized adaptive ... multi-agent decentralized adaptive control, for a typical general model with coupling uncertainties and other uncertainties, we have investigated several decentralized adaptive control problems, designed ... 230 Discrete Time Systems computational effort and is relatively more scalable with respect to the swarm size In recent years, especially since the so-called Vicsek model was reported in Vicsek...

Ngày tải lên: 20/06/2014, 01:20

... divided into delay-independent and delay-dependent conditions The delayindependent conditions are more restrictive than delay-dependent conditions In general, for discrete-time systems with delays, ... Guangzhou, China Introduction The control of discrete systems with time-varying delays has been researched extensively in the last few decades Especially in recent years there are increasing interests ... Control performance Here the acquired performance by the autonomously guided vehicle under the described simulated setup will be evaluated First, in Fig 3, the path error evolution corresponding...

Ngày tải lên: 20/06/2014, 01:20

... additionally addressed here by considering what is pointed out in Subsection 5.5 5.7 Performance by delay-free model specification Some well developed techniques related to model-following control (or ... to several load disturbances Also, a time-varying delay can be expected, since the velocity of the displacement of the mass across the furnace may vary A discrete-time with delayed state model ... time-invariant delay Discrete-time switched systems with delayed state have been studied by Hetel et al (20 08) and Ibrir (20 08) The former establishes the equivalence between the approach used...

Ngày tải lên: 20/06/2014, 01:20

... and will be used later for switched descriptor systems Problem formulation In this article, we consider the switched system composed of N linear discrete-time descriptor subsystems described ... the grey discrete time time-delay systems The proposed examples clearly demonstrate that the criteria presented in this paper for the stability of grey discrete time systems with time-delay are ... easy to tackle and there are not rich results available up to now Secondly, switching between several descriptor systems makes the problem more complicated and even not easy to make clear the...

Ngày tải lên: 20/06/2014, 01:20