Top PDF Adaptive neuro-fuzzy model with fuzzy clustering for nonlinear prediction and control

Adaptive neuro-fuzzy model with fuzzy clustering for nonlinear prediction and control

Adaptive neuro-fuzzy model with fuzzy clustering for nonlinear prediction and control

analyses are much more difficult. This paper presents the use of neuro-fuzzy networks as means of implementing algorithms suitable for nonlinear black-box prediction and control. In engineering applications, two attractive tools have emerged recently. These two attractive tools are: the artificial neural networks and the fuzzy logic system. One area of particular importance is the design of networks capable of modeling and predicting the behavior of systems that involve complex, multi-variable processes. To illustrate the applicability of the neuro-fuzzy networks, a case study involving air-fuel ratio is presented here. Air-fuel ratio represents complex, nonlinear and stochastic behavior. To monitor the engine conditions, an adaptive neuro-fuzzy inference system (ANFIS) is used to capture the nonlinear connections between the air-fuel ratio and control parameters such manifold air pressure, throttle position, manifold air temperature, engine temperature, engine speed, and injection opening time. This paper describes a fuzzy clustering method to initialize the ANFIS.
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Design & Analysis of Advanced Adaptive Neuro Fuzzy Interface systems for Nonlinear Networked Control Systems

Design & Analysis of Advanced Adaptive Neuro Fuzzy Interface systems for Nonlinear Networked Control Systems

nonlinear ones directly due to complex nonlinearities. Some of the above advanced control methods have been applied to modeling, analysis, and synthesis for nonlinear NCSs. For example, based on fuzzy Takagi–Sugeno (T–S) model, a statefeedbackcontrol strategy was proposed for nonlinear NCSs in presence of data loss and network-induced delay, and applied to a flexible-joint robot system in [28]. To address the unmeasurable states problem, Qiuet al. [29] provided a piecewiseoutput-based control scheme for NCSs in the framework offuzzy T–S model. In addition, considerable remarkable nonlinear NCSs results based on fuzzy T–S model have been published in literature, including filter [30], fault detection and isolation [31], fault-tolerant control [32], and model predictive control [33]. It should be noticed that existing schemes in the framework of T–S fuzzy model involve computing a group of linear matrix inequalities, which may lead to complex computation.
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Analysis of Control of Inverted Pendulum using Adaptive Neuro Fuzzy system

Analysis of Control of Inverted Pendulum using Adaptive Neuro Fuzzy system

Introduction: Inverted Pendulum is a good model for, an automatic aircraft landing system, the attitude control of a space booster rocket and a satellite stabilization of a cabin in a ship, aircraft stabilization in the turbulent air-flow etc. To solve such problem with non-linearity and time variant system, there are alternatives such as a real time computer simulation of these equations or linearization. The inverted pendulum is a highly nonlinear and open-loop unstable system [5, 6, 8]. This means that standard linear techniques cannot be modeled as the nonlinear dynamics of the system. In the Neuro-Fuzzy systems the neural networks (NN) are incorporated in fuzzy systems, which can use fuzzy knowledge automatically by learning algorithms of NNs. They can be visualized as a mixture of local experts. Adaptive Neuro-Fuzzy inference system (ANFIS) is one of the of Neuro Fuzzy systems in which a fuzzy system is incorporated in the framework of adaptive networks. ANFIS constructs an input-output mapping based both on human knowledge i.e. rules and on generated input-output data pairs. The Neuro- Fuzzy systems can be visualized as a mixture of local experts and their par least squares optimization methods. The most frequently used NNs in Neuro-Fuzzy systems are radial basis function networks (RBFN). ANFIS forms an input output mapping based both on human knowledge
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A New Approach to Adaptive Neuro-fuzzy Modeling using Kernel based Clustering

A New Approach to Adaptive Neuro-fuzzy Modeling using Kernel based Clustering

University of Jammu Campus, India Abstract- Data clustering is a well known technique for fuzzy model identification or fuzzy modelling for apprehending the system behavior in the form of fuzzy if-then rules based on experimental data. Fuzzy c- Means (FCM) clustering and subtractive clustering (SC) are efficient techniques for fuzzy rule extraction in fuzzy modeling of Adaptive Neuro-fuzzy Inference System (ANFIS). In this paper we have employed a novel technique to build the rule base of ANFIS based on the kernel based variants of these two clustering techniques which have shown better clustering accuracy. In kernel based clustering approach, the kernel functions are used to calculate the distance measure between the data points during clustering which enables to map the data to a higher dimensional space. This generalization makes data set more distinctly separable which results in more accurate cluster centers and therefore a more precise rule base for the ANFIS can be constructed which increases the prediction performance of the system. The performance analysis of ANFIS models built using kernel based FCM and kernel based SC has been done on three business prediction problems viz. sales forecasting, stock price prediction and qualitative bankruptcy prediction. A performance comparison with the ANFIS models based on conventional SC and FCM clustering for each of these forecasting problems has been provided and discussed.
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Adaptive Neuro-Fuzzy System for Cancer

Adaptive Neuro-Fuzzy System for Cancer

ANFIS is a kind of hybrid of neural network and fuzzy logic and is based on Takagi–Sugeno fuzzy inference system. In ANFIS, we combine both the learning capabilities of a neural network and reasoning capabilities of fuzzy logic in order to give enhanced prediction capabilities [2]. Since it integrates both neural networks and fuzzy logic principles, it has potential to capture the benefits of both in a single framework. Its inference system corresponds to a set of fuzzy [3] IF–THEN rules that have learning capability to approximate nonlinear functions. Hence, ANFIS is considered to be universal approximator. The ANFIS model is very suitable and can generate excellent classification results provided that the right type and number of Membership Functions (MFs) are used in the classification task [4].In the classification [5] two different classification techniques are employed: an artificial neural network-based classifier and a hybrid ANFIS classifier. A neural classifier can learn from data, but the output does not lead itself naturally to interpretation. An ANFIS classifier is based on a three-layer feed-forward neural network and combines the merits of both neural and fuzzy classifiers while overcoming their drawbacks and limitations. The developed Adaptive Neuro Fuzzy Inference System (ANFIS) classifier exhibits high levels of accuracy, consistency and reliability, with acceptably low computational time and is a promising new development in the field of diagnosis of cancer.
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Dynamic nonlinear inverse-model based control of a twin rotor system using adaptive neuro-fuzzy inference system

Dynamic nonlinear inverse-model based control of a twin rotor system using adaptive neuro-fuzzy inference system

The nonlinear forward model of the TRMS has been successfully obtained and reported in [7], [8], [9]. Therefore, the same system identification technique based on experimental input-output data pairs is employed to obtain the inverse model of the system. The advantage of an inverse model is that it can be used to build a controller. The desired behavior is treated as an input variable in the model, and the action is treated as an output variable. Since the input–output dynamics of the model and the controller are the same, they share the same stability properties, thus it is sufficient to show stability of the model only, when determining stability of the model and of the controller [10]. An adaptive neuro- fuzzy inference system (ANFIS) is augmented to the control system to improve the control response. Thus, the control techniques embraced in this work are augmented ANFIS 2009 Third UKSim European Symposium on Computer Modeling and Simulation
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An adaptive fuzzy regression model for the prediction of dichotomous response variables

An adaptive fuzzy regression model for the prediction of dichotomous response variables

An interval prediction is usually comprised of the upper and lower limits between which a future unknown value is expected to lie with a prescribed probability. The prediction interval deals with the accuracy of the estimates with respect to the observed target values [7]. The use of prediction interval in machine learning is appropriate when dealing with multivariate functions where available data are very imprecise and limited and when explanatory variables are interacting in uncertain, vague manners [1]. In other words a fuzzy phenomenon is best modeled by a fuzzy functional relationship. The use of prediction interval in machine learning is referred to as fuzzy linear regression technique.
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Survey of fuzzy inference model and impact on QOS parameters using 
		adaptive neuro fuzzy inference system in MANET

Survey of fuzzy inference model and impact on QOS parameters using adaptive neuro fuzzy inference system in MANET

Shafigh, A. S. Abdollahi , K. Kassler Andeas J [1] proposed Fuzzy logic control method to improve the performance and reliability of the multicast routing protocols in MANET. Strong and small forwarding group is established to decrease the resource consumption and higher stability of the delivery structure. A forwarding group is made out of set of strong /weak nodes. Fuzzy logic is proposed to distinguish the strong and weak nodes in the network. Join query packet is periodically broadcasted to update the routes in the network. An intermediate node receives a non-duplicate join query; it stores the upstream node ID into the routing table and rebroadcasts the packet. A node receives a join query message; it needs to fuzzyfys the parameters such as bandwidth, node speed and power level of previous node. The value of previous node's parameter is used to classify them as low, medium or high. After fuzzification, inference process is used to derive the probability of caching and forwarding the join query to other nodes. Using fuzzy based approach only links and nodes which are more robust or have more available power will participate in the forwarding mesh.
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A wavelet based solar radiation prediction in Nigeria using adaptive neuro-fuzzy approach

A wavelet based solar radiation prediction in Nigeria using adaptive neuro-fuzzy approach

research have strong linear relation with horizontal solar radiation and are readily available at the meteorological station in Nigeria. The developed WT-ANFIS model proves to be good model for horizontal solar radiation prediction. The statistical values of the MAPE, RMSE and R² obtained are 0.23712, 0.82161 and 0.9887 respectively. Based on the values of R² used for comparison between the developed model and the validated models, the WT-ANFIS show better accuracy and performance. Also, by adding more meteorological data more prediction accuracy is attained. With the obtained results, it indicates that the addition of WT for data decomposition and reconstruction improves the ANFIS model accuracy for horizontal solar radiation prediction. More meteorological data will be considered in future study and new models will be developed using new soft computing techniques.
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Identification and Prediction Using Neuro-Fuzzy Networks with Symbiotic Adaptive Particle Swarm Optimization

Identification and Prediction Using Neuro-Fuzzy Networks with Symbiotic Adaptive Particle Swarm Optimization

where m ij and  ij represent a Gaussian membership function with mean and deviation, respectively, of the ith dimension and the jth rule node. The consequents Bj of the jth rule are aggregated into one fuzzy set for the output variable y’. Crisp action is obtained through defuzzification, which calculates the centroid of the output fuzzy set. The more common fuzzy inference method proposed by Mamdani, Takagi, Sugeno, and Kang introduced a modified inference scheme [5]. The first two parts of the fuzzy inference process, fuzzifying the inputs and applying the fuzzy operator, are exactly the same. A Takagi-Sugeno-Kang (TSK)-type fuzzy model employs different implications and aggregation methods than the standard Mamdani controller. Instead of fuzzy sets being used, the conclusion part of a rule is a linear combination of the crisp inputs.
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Adaptive Fuzzy Model Predictive Control for Non-minimum Phase and Uncertain Dynamical Nonlinear Systems

Adaptive Fuzzy Model Predictive Control for Non-minimum Phase and Uncertain Dynamical Nonlinear Systems

Model Predictive Control (MPC) [1] has been widely and successfully applied in industrial process, especially the multi-input, multi-output (MIMO) nonlinear process. Several recent publications have provided a good introduction to theoretical and practical issues associated with MPC technology. In 1999, Allgower, Badgwell, Qin, Rawlings, and Wright [13] presented a more comprehensive overview of nonlinear MPC and moving horizon estimation, including a summary of recent theoretical developments and numerical solution techniques, Rawlings (2000)[25] provided an excellent introductory tutorial aimed at control practitioners. A comprehensive review of theoretical results on the closed-loopbe havior of MPC algorithms was provided by Rawlings, Rao, and Scokaert (2000). Notable past reviews of MPC theory include those of Garsíaa, Prett, and Morari (1989)[18] ; Ricker (1991)[21] ; Morari and
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Adaptive Neuro Fuzzy Expert System for Diagnosing HIV

Adaptive Neuro Fuzzy Expert System for Diagnosing HIV

Fuzzy logic is a convenient way to map an input space to an output space. For example, the user tells the controller how hot he wants the water to be and the controller adjusts the faucet valve to the right setting, the user tells the camera control how far away the subject of the photograph is, and the controller adjusts the focus the lens etc. It is all just a matter of mapping inputs to the appropriate outputs. Between the input and the output, a black box does the work. The black box may contain any number of things like fuzzy systems, linear systems, expert systems, neural networks, differential equations, interpolated multidimensional lookup tables, or even a spiritual advisor. A knowledge-based online diagnosis system developed for the diagnosis of diseases based on the knowledge given by doctors in the system. A computer Program Capable of performing at a human- expert level in a narrow problem domain area is known as called an expert system [5]
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Adaptive Neuro-Fuzzy Inference System for Prediction of Surgery Time for Ischemic Stroke Patients

Adaptive Neuro-Fuzzy Inference System for Prediction of Surgery Time for Ischemic Stroke Patients

For our proposed solution, we intend to model a Fuzzy Infe rence System that predicts when a patient needs to undergo Decompressive He mic raniecto my. The inputs to this system are the pred icted output fro m the baseline solution and the predicted output of a model trained to predict whether a patient needs to undergo the surgery. Simila r to [4], which our work is an extension of, we want to prove that we can use FIS to accurately predict for an argumentatively unique and significantly complicated proble m than those already addressed in the literature by others. Complication occurs due to the fact that unlike in most other medical conditions already addressed in the literature that usually have a larger sized offline dataset available to mode l their proposed solution on, the dataset available for stroke is on the other hand very limited. A lso unlike in other medica l prob le ms as those discussed above that deal with d iagnosis or detection of a med ical condition that can be done over a period of time , prediction of infa rction volume and thus the decision to operate on a patient, on the other hand, is very time critica l. These decisions need to be taken as accurately and as fast as possible to avoid further health co mp licat ions such as disabilit ies or death . By build ing an e ffective prediction model, we offer to not only significantly reduce the decision time required by doctors but also help reduce the number of CT scans required by patients to only one.
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An adaptive neuro fuzzy model for estimating the reliability of component-based software systems

An adaptive neuro fuzzy model for estimating the reliability of component-based software systems

Abstract Although many algorithms and techniques have been developed for estimating the reliability of component-based software systems (CBSSs), much more research is needed. Accurate estimation of the reliability of a CBSS is dif- ficult because it depends on two factors: component reliability and glue code reli- ability. Moreover, reliability is a real-world phenomenon with many associated real-time problems. Soft computing techniques can help to solve problems whose solutions are uncertain or unpredictable. A number of soft computing approaches for estimating CBSS reliability have been proposed. These tech- niques learn from the past and capture existing patterns in data. The two basic elements of soft computing are neural networks and fuzzy logic. In this paper, we propose a model for estimating CBSS reliability, known as an adaptive neuro fuzzy inference system (ANFIS), that is based on these two basic elements of soft computing, and we compare its performance with that of a plain FIS (fuzzy inference system) for different data sets.
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A GA-Based Adaptive Neuro-Fuzzy Controller for Greenhouse Climate Control System

A GA-Based Adaptive Neuro-Fuzzy Controller for Greenhouse Climate Control System

In the first simulation, the outside weather conditions are T out = 35 C and w out = 4 g/kg (RH = 10%), while Si = 300 W/m 2 . The humidity ratio set point was raised from 18 to 24 g/kg (which corresponds to a relative humidity change from 60% to 80%) at t = 100 min, with the temperature set point 30 C; then the temperature set point was decreased from 30 to 28 C at t = 200 min (humidity ratio set point 24 g/kg), the responses for set point step changes in humidity ratio and temperature are in Fig. 4 . As we see the response under pro- posed G-ANFIS controller is very smooth and nearly close to set point than that given by ANFIS without tuning .The ventilation rate and water capacity of fog system as a control signals are shown in Fig. 5 . The simulation results clearly demonstrate the interacting control was attained and the closed-loop system response is very acceptable. Moreover, the response of the G-ANFIS controller is much faster than AFISN.
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Active Suspension System Control Using Adaptive Neuro Fuzzy (ANFIS) Controller

Active Suspension System Control Using Adaptive Neuro Fuzzy (ANFIS) Controller

Bell-shaped membership functions are used to model the inputs and outputs. By choosing these membership functions, each input signal is assigned to all linguistic groups which can reduce the ambiguity in the border areas. Figures2 and 3 show the bell-shaped membership functions chosen for FIS inputs, and Figure 4 shows the bell-shaped membership functions chosen for the output. In these figures NL, NM, NS, Z, PS, PM and PL denote negative large, negative medium, negative small, zero, positive small, positive medium and positive large, respectively. Inputs and output cured face of fuzzy inference is illustrated in Figure 5.The following control rule is applied in fuzzy controller:
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Applying of an Adaptive Neuro Fuzzy Inference System for Prediction of Unsaturated Soil Hydraulic Conductivity

Applying of an Adaptive Neuro Fuzzy Inference System for Prediction of Unsaturated Soil Hydraulic Conductivity

For describing relationships between different combinations of inputs and outputs such as those that must be determined for accurately predicting soil hydraulic conductivity, ANN is currently the most widely used technique (Erzin et al., 2009; Moosavi and Sepaskhah, 2012). Since Zadeh (1965) proposed the fuzzy logic approach to describe complicated systems, it has become popular and been successfully used to solve prediction purposes in various agricultural and engineering problems (Sarmadian and Mehrjardi, 2010). A recent literature review shows that the use of adaptive-network-based fuzzy inference system (ANFIS) (Jang, 1993; Ho et al., 2011) for such purposes is relatively rare and applied in predicting soil properties in the conditions where there isn’t enough information about how parameters relate to each other (El Awady et al., 2002; Minasny et al., 2004; Akbarzadeh et al., 2009; Sezer et al., 2009; Anari et al., 2011; Yilmaz and Kaynar, 2011; Kalkhajeh et al., 2012; Moosavi and Sepaskhah, 2012; Xue and Yang, 2013).
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Adaptive Fuzzy Sliding Mode Control of Uncertain Nonlinear SISO Systems

Adaptive Fuzzy Sliding Mode Control of Uncertain Nonlinear SISO Systems

been found to be particularly useful to model unknown functions in nonlinear systems rather that only unknown parameters. There have been signicant research efforts on adaptive fuzzy control for nonlinear systems [2–4]. The major advantage in all these adaptive fuzzy control schemes are that the developed controllers can be handled the complex nonlinear functions instead of linearly parameters.

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Optimal Design of Geometrically Nonlinear Space Trusses Using an Adaptive Neuro-Fuzzy Inference System

Optimal Design of Geometrically Nonlinear Space Trusses Using an Adaptive Neuro-Fuzzy Inference System

Due to the fact that material cost is one of the major factors in the construction of a structure, it is preferable to reduce it by minimizing the weight of the structural system. All of the methods used for minimizing the weight intend to achieve an optimum design having a set of design variables under certain design criteria. A great development of structural optimization took place in the early 60's when programming techniques were used in the minimization of structure weight. From then on, various general approaches have been developed and adopted for structural optimization [1- 6]. Moreover, one of the main diculties of structural optimization methods is that they need a great number of structural analyses to achieve an optimal solution. This deciency may increase when nonlinear analysis must be implemented. This inherent nature of op- timization methods can impose much computational eort on the process. Over the last years, some
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A framework of modified adaptive neuro-fuzzy inference engine

A framework of modified adaptive neuro-fuzzy inference engine

METHODOLOGY 3.1 Overview 3.2 Design of a Modified Adaptive Fuzzy Inference Engine MAFIE 3.2.1 Fuzzy Inference System FIS 3.2.2 Hybrid Fuzzy clustering algorithm for Automatic Generation [r]

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