intrusion monitoring in process control systems

... −cos φ sinψ + sin φsin θ cosψ cos φ cosψ + sin φsin θ sinψ sin φ cosθ ⎦ sin φ sinψ + cos φsin θ cosψ −sin φ cosψ + cos φsin θ cosψ cos φ cosθ (5) The details of this UAV model are described in ... nonlinear Furthermore, the main problem encountered in the modeling of our UAV is that the process of buying a radio -control. .. the linear and nonlinear parts, and then control the linear ... the outer-loop controller The semi-linearized UAV model, presented in (7) can be controlled in separate parts: the linear part in the inner-loop and the nonlinear part in the outer-loop,

Ngày tải lên: 19/06/2014, 23:20

... G in 2 252 Advances in Flight Control Systems The remaining job is simple, and we can repeat the procedure of designing the outer-loop controller for Subsystem 1 and design a P-controller in ... Actual Reference Fig. 21. Tracking a desired path. 256 Advances in Flight Control Systems [...]... use in applications in intelligent control engineering Artificial neural networks offer ... artificial intelligence modeling technology based on fuzzy logic and neural network [5] Intelligent control is a control technology that replaces the human mind in making decisions, planning control

Ngày tải lên: 19/06/2014, 23:20

... where xz is the plane of symmetry, is: cos cos cos sin sin cos sin sin cos sin sin cos sin cos cos cos sin cos sin cos sin sin cos cos sin cos cos cos cos V rq V g X VmV g VY pr VVmV V pq V ... linguistic describing. This is practiced, for example, in case of guiding for landing in non-visibility conditions or in piloting learning. This approach permits to build a model for landing ... Logic-Based Control Design The existing applications of fuzzy control range from micro-controller based systems in home applications to advanced flight control systems. The main advantages of using

Ngày tải lên: 19/06/2014, 23:20

... Balint, A.M.; Chilarescu, C. & Balint, St. (2002). The control of rolling maneuver Nonlinear Studies, 9,4, (Dec.2002) 331-360. ISSN: 1359-8678 (print) 2153-4373 (online) Kaslik, E.; Balint, ... Automatic Flight Control System Fails 295 Gaines, R.& Mawhin J. (1977). Coincidence Degree and Nonlinear Differential Equations, Springer, ISBN: 3-540-08067-8, Berlin – New York. Goto, ... & Balint, St. (2005b) Considerations concerning the controllability of a hyperbolic equilibrium state. Proceedings of the 5 th International Conference on Nonlinear problems in aviation

Ngày tải lên: 19/06/2014, 23:20

... (adaptive control of time-varying plants); • Control and regulation around some operating point, optimal control and robust control; • Signal processing (cancellation of noise, filtering and interpolation); ... adaptive control, is suitable for nonlinear and/or time varying plants In adaptive control schemes, the plant model, valid in several operating conditions is identified on-line The controller ... Advanced Control Systems Design Advanced Control Systems Design Highlighted Aspects From Black Box Fuzzy Modeling Box Fuzzy Modeling for 2.2 Takagi-Sugeno fuzzy inference systems The

Ngày tải lên: 28/06/2014, 22:20

... gain of both process and controller are zero. The loop cannot, therefore, sustain oscillations. A Two-capacity Process Having established the ease with which a single-capacity process may be controlled, ... must be intentionally forced Witness the amplifier in Fig 2. 1 As a 49 1 n Ud erstanding Feedback Control general rule, multicapacity processes contain a natural interaction, responding in the ... 2. In most processes, including this one, k would not be a constant even if the load were fixed, because the relationship between input and output is not linear. In a real liquid-level process,

Ngày tải lên: 12/08/2014, 16:21

... 0. 64 1.08 m Linear FIG 4. 9 Increasing... extension to a broad range of difficult processes, a dead-time plus integrating process will be used, with controller settings left in terms of 74 ... stream is controlled by manipulating an influent stream, as in this example, the process is linear. But if effluent composition is controlled by manipulat- ing the efluent flow, the process ... discussed in the fore- going pages is summarized in Table 3.3. Nothing that has not been already covered is presented in the table, yet gathering all this information together discloses some interesting

Ngày tải lên: 12/08/2014, 16:21

... function is not difficult to intro- duce into a linear controller; it involves sending the controlled variable to the set-point input through high and low limits. Within the limits, there is no ... nonlinear device that is purposely inserted into a loop for the sake of engendering stability must have the opposite characteristic: gain increasing with amplitude. The only stabilizing nonlinear ... of this sort produces varying degrees of damping in the closed loop. If a linear controller were used to regulate a given linear process, a certain proportional gain could be found which would

Ngày tải lên: 12/08/2014, 16:21

... determine which of the variables is more deserving of precise control DECOUPLING CONTROL SYSTEMS Controlling a single-variable process is... mathematical Multivariable Process Control ... Following is a dead-band filter, preventing noise and insignificant disturbances from affecting loop gain. An integral mode is used for introducing the adaptive signal in order to retain its ... set into the controller manipulating stream d The incoming concentration... think of the pressure controller being in automatic, but with a wide band and long reset-i.e., very loose settings

Ngày tải lên: 12/08/2014, 16:21

... solving the control problem directly, and this is called “feedforward control. ” The principal factors affecting the process are measured and, along with the set point, are used in computing the ... * Process Controlled variable * I I FIG 8.1. The control system embodies a for- ward flow of information. PO6 1 Multiple-loop Systems Although a single controlled variable is indicated in the ... underdamped, indicating that the process gain changes inversely with liquid flow, ( T h is characteristic was discussed under “Variable Dynamic Gain” in Chap 2, and again under “Dynamic Adaptive Systems

Ngày tải lên: 12/08/2014, 16:21

... spray water into a steam line. A direct mixing system was discussed in Chap. 3. At that time, the characteristic nonlinearities of the process were noted. In general, a system combining streams ... flowing streams are joined, heat transfer is governed by mixing. hIost heat transfer operations, however, are limited by the necessity of maintaining isolation between the flowing streams; in ... Temperature control can be linearized through the use of a three-way mixing valve if flow control is not a requirement. As one inlet port of a three-way valve is opened, the opposite inlet is closed. In

Ngày tải lên: 12/08/2014, 16:21

... column that is split’ting feed containing 12 percent )wer-boiling component into a 90 percent pure distillate and a bottoms product ontaining onIy 0.6 percent lower-boiling component. A lthough ... to the practi- tioner in t,he way of interpreting the design rules contained herein in terms of his own problems. In t,his regard, a word of warning: do not att,empt, t,o make your particular ... used to specify it,s initial boiling point. lcigure 12.2 shows how the temperature controller would be used to adjust the heat input to feed ratio. A lag is indicated in the forward loop, because

Ngày tải lên: 12/08/2014, 16:21

... adaptive systems, 172 in decoupling systems, 200-202 in feedforward systems, 209 for gain compensation, 172, 223, 2 2 4 in ratio control, 162-164 Multivariable process (see Process control, ... Stability, in nonlinear systems, 125, 126... non-self-regulating, 18-20 Index Process, self-regulating, 20-24 single-capacity, 18-24 two-capacity, 24-31 Process control, multivariable, 181-202 controlled ... manipulated variables, pairing, 188-198 controlled variables, choosing, 182-188 decoupling control systems, 198202 Process gain, 51-53 Process model, for decoupling systems, 198-202 of distillation,

Ngày tải lên: 12/08/2014, 16:21

... Chapter Introduction Chapter Review of Control Loop Performance Monitoring 2.1 Introduction 2.2 History of Control Loop Performance Monitoring 2.3 Minimum Variance Benchmark 11 2.3.1 Minimum ... benchmarking and monitoring. Great strides have been made in the assessment of control loop performance using the minimum variance controller as the benchmark. In a scenario where more than 95% of process ... chemical process industry. Industrial process control systems are configured as multiloop feedback controllers. Therefore, the scope of our work was extended to the domain of multiloop control systems.

Ngày tải lên: 16/09/2015, 12:35

... Modeling for Advanced Control Systems Design 6 Will-be-set-by -IN- TECH the theory of Fuzzy Systems, associated to computer programs, are able to process numerical data and/or linguistic information, ... especially from 70’s, has been characterized by the growing need to improve the efficiency of industrial control systems in the following aspects: increasing product quality, reduced losses, and other ... models. The research on fuzzy inference systems has been developed in two main directions. The first direction is the linguistic or qualitative information, in which the fuzzy inference system is developed...

Ngày tải lên: 16/03/2014, 23:20

... pointed out that t,his steady-state gain had no influence whatsoever on the dynamic gain of the process. The dynamic gain of the process can be considered identical to that of the integrating process. ... gain. If the controlled variable is a11 integral of jlflow, such as pressure or level, dimensional gain is included in the integrating time constant V/F. The self-regulating liquid-level process ... Ud n erstanding Feedback Control constant dynamic gain, except for a process whose dominant element is a pipeline. Most analyzers are not so far from being linear that they materially affect the gain...

Ngày tải lên: 01/04/2014, 11:09

... 2011 Printed in India A free online edition of this book is available at www.intechopen.com Additional hard copies can be obtained from orders@intechweb.org Advances in Flight Control Systems, ... adaptive control in a model inversion fl ight control architecture. The blending of both direct and indirect adaptive control is sometimes known as composite adaptation. The indirect adaptive control ... XI Preface life applications, since monitoring of data is more meaningfull. Adaptive nonlinear dy- namic inversion is selected as the preferred adaptive control method in this modular or indirect approach....

Ngày tải lên: 19/06/2014, 23:20

... Stevens, 1992): 0 cos cos sin cos sin V XV V χ γ χ γ γ ⎡ ⎤ ⎢ ⎥ = ⎢ ⎥ ⎢ ⎥ − ⎣ ⎦  (1) () () () 1 1 cos cos sin 1 sin cos sin sin cos sin cos cos 1 cos sin cos sin sin sin cos cos DT g m XLYT mV g LYT mV ... the tracking controllers. Singh (2003) uses a combination of sliding-mode control and adaptive control. In this chapter an integrated, though cascaded Lyapunov-based adaptive backstepping (Krstić ... Marine Corps Base, Virginia in September of 2000. Fly-offs were also conducted in several other locations including MacDill AFB, Florida, again, with the LuMAV appearing as the only rotary-wing/VTOL...

Ngày tải lên: 19/06/2014, 23:20

... formation-flying control. Appendix constraint adaptive backstepping Backstepping [21] is a systematic, Lyapunov-based method for nonlinear control design, which can be applied to nonlinear systems ... rate control In the fourth step, an inner-loop feedback loop for the control of the body-axis angular rates 3 T X pq r= ⎡⎤ ⎣⎦ is constructed. The control inputs for the inner loop are the control- surface ... , the tracking errors are defined as Advances in Flight Control Systems 38 Table 3. Manoeuvre 1 at flight condition 2: mean absolute value of tracking errors and control inputs ...

Ngày tải lên: 19/06/2014, 23:20

... tolerance of a flight control system is a major selling point of adaptive control since traditional gain-scheduling control methods are viewed as being less capable of handling off-nominal flight conditions ... adaptive control can improve the performance of a flight control system by incorporating a model inversion indirect adaptation in conjunction with a direct adaptation. The inner loop rate feedback control ... an indirect adaptive law which updates the model inversion controller; and moreover ˆ G is ensured to be invertible by verifying its matrix conditioning number. 56 Advances in Flight Control Systems ...

Ngày tải lên: 19/06/2014, 23:20