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34 results about "Soft computing" patented technology

Soft computing, as opposed to traditional computing, deals with approximate models and gives solutions to complex real-life problems. Unlike hard computing, soft computing is tolerant of imprecision, uncertainty, partial truth, and approximations. In effect, the role model for soft computing is the human mind. It was conceived by Lotfi Zadeh, pioneer of a mathematical concept known as fuzzy sets which led to many new fields such as fuzzy control systems, fuzzy graph theory, fuzzy systems, and so on. Zadeh observed that people are good at 'soft' thinking while computers typically are 'hard' thinking. People use concepts like 'some', 'most', or 'very' rather than 'hard' or precise concepts of 3.5 or 102. People want a 'warm' glass of milk, not one that is 102 degrees. In general, people are good at learning, finding patterns, adapting and are rather unpredictable. In 'hard' computing, by contrast, machines need precision, determinism and measures, and although pattern recognition happens, there is a 'brittleness' if things change - it cannot easily adapt. 'Soft' computing by contrast embraces chaotic, neural models of computing that are more pliable. Because there is no known single method that lets us compute like people, soft computing involves using a combination of methods that each bring something helpful to achieve this goal. The principal constituents of Soft Computing (SC) are Fuzzy Logic (FL), Evolutionary Computation (EC), Machine Learning (ML) and Probabilistic Reasoning (PR), with the latter subsuming belief networks and parts of learning theory.

Intelligent robust control system for motorcycle using soft computing optimizer

A Soft Computing (SC) optimizer for designing a Knowledge Base (KB) to be used in a control system for controlling a motorcycle is described. In one embodiment, a simulation model of the motorcycle and rider control is used. In one embodiment, the simulation model includes a feedforward rider model. The SC optimizer includes a fuzzy inference engine based on a Fuzzy Neural Network (FNN). The SC Optimizer provides Fuzzy Inference System (FIS) structure selection, FIS structure optimization method selection, and teaching signal selection and generation. The user selects a fuzzy model, including one or more of: the number of input and/or output variables; the type of fuzzy inference; and the preliminary type of membership functions. A Genetic Algorithm (GA) is used to optimize linguistic variable parameters and the input-output training patterns. A GA is also used to optimize the rule base, using the fuzzy model, optimal linguistic variable parameters, and a teaching signal. The GA produces a near-optimal FNN. The near-optimal FNN can be improved using classical derivative-based optimization procedures. The FIS structure found by the GA is optimized with a fitness function based on a response of the actual plant model of the controlled plant. The SC optimizer produces a robust KB that is typically smaller that the KB produced by prior art methods.
Owner:YAMAHA MOTOR CO LTD

Intelligent electronically-controlled suspension system based on soft computing optimizer

InactiveUS20060293817A1Near-optimal FNNMaximises informationDigital data processing detailsAnimal undercarriagesInput/outputSoft computing
A Soft Computing (SC) optimizer for designing a Knowledge Base (KB) to be used in a control system for controlling a suspension system is described. The SC optimizer includes a fuzzy inference engine based on a Fuzzy Neural Network (FNN). The SC Optimizer provides Fuzzy Inference System (FIS) structure selection, FIS structure optimization method selection, and teaching signal selection and generation. The user selects a fuzzy model, including one or more of: the number of input and/or output variables; the type of fuzzy inference model (e.g., Mamdani, Sugeno, Tsukamoto, etc.); and the preliminary type of membership functions. A Genetic Algorithm (GA) is used to optimize linguistic variable parameters and the input-output training patterns. A GA is also used to optimize the rule base, using the fuzzy model, optimal linguistic variable parameters, and a teaching signal. The GA produces a near-optimal FNN. The near-optimal FNN can be improved using classical derivative-based optimization procedures. The FIS structure found by the GA is optimized with a fitness function based on a response of the actual suspension system model of the controlled suspension system. The SC optimizer produces a robust KB that is typically smaller that the KB produced by prior art methods.
Owner:YAMAHA MOTOR CO LTD

Soft computing optimizer of intelligent control system structures

The present invention involves a Soft Computing (SC) optimizer for designing a Knowledge Base (KB) to be used in a control system for controlling a plant such as, for example, an internal combustion engine or an automobile suspension system. The SC optimizer includes a fuzzy inference engine based on a Fuzzy Neural Network (FNN). The SC Optimizer provides Fuzzy Inference System (FIS) structure selection, FIS structure optimization method selection, and teaching signal selection and generation. The user selects a fuzzy model, including one or more of: the number of input and / or output variables; the type of fuzzy inference model (e.g., Mamdani, Sugeno, Tsukamoto, etc.); and the preliminary type of membership functions. A Genetic Algorithm (GA) is used to optimize linguistic variable parameters and the input-output training patterns. A GA is also used to optimize the rule base, using the fuzzy model, optimal linguistic variable parameters, and a teaching signal. The GA produces a near-optimal FNN. The near-optimal FNN can be improved using classical derivative-based optimization procedures. The FIS structure found by the GA is optimized with a fitness function based on a response of the actual plant model of the controlled plant. The SC optimizer produces a robust KB that is typically smaller that the KB produced by prior art methods.
Owner:YAMAHA MOTOR CO LTD

Automatic estimation method for antenna pattern relative to high-frequency ground wave radar

The invention provides an automatic estimation method for an antenna pattern relative to high-frequency ground wave radar. The method comprises the following steps of: selecting single arrival angle echo spectral points with higher signal-to-noise ratios than a predetermined signal-to-noise ratio from radar echo signals; modifying a current antenna pattern by utilizing the amplitude ratios and the arrival angles of various selected signal arrival angle echo signal spectral points to obtain a modified antenna pattern; judging whether the modified antenna pattern is converged relative to the current antenna pattern; if the modified antenna pattern is converged relative to the current antenna pattern, taking the modified antenna pattern as the obtained antenna pattern; and if the modified antenna pattern is not converged relative to the current antenna pattern, repeating the modifying step by taking the modified antenna pattern as the current antenna pattern. By the method provided by the invention, each antenna pattern is estimated from the radar echo signals in a soft computing mode completely; the conventional measurement mode which adopts an additional transponder or beacon equipment is abandoned; and the complexity and the operating cost of a high-frequency ground wave radar system are reduced greatly.
Owner:WUHAN UNIV

Intelligent robust control system for motorcycle using soft computing optimizer

A Soft Computing (SC) optimizer for designing a Knowledge Base (KB) to be used in a control system for controlling a motorcycle is described. In one embodiment, a simulation model of the motorcycle and rider control is used. In one embodiment, the simulation model includes a feedforward rider model. The SC optimizer includes a fuzzy inference engine based on a Fuzzy Neural Network (FNN). The SC Optimizer provides Fuzzy Inference System (FIS) structure selection, FIS structure optimization method selection, and teaching signal selection and generation. The user selects a fuzzy model, including one or more of: the number of input and / or output variables; the type of fuzzy inference; and the preliminary type of membership functions. A Genetic Algorithm (GA) is used to optimize linguistic variable parameters and the input-output training patterns. A GA is also used to optimize the rule base, using the fuzzy model, optimal linguistic variable parameters, and a teaching signal. The GA produces a near-optimal FNN. The near-optimal FNN can be improved using classical derivative-based optimization procedures. The FIS structure found by the GA is optimized with a fitness function based on a response of the actual plant model of the controlled plant. The SC optimizer produces a robust KB that is typically smaller that the KB produced by prior art methods.
Owner:YAMAHA MOTOR CO LTD

Quick prediction method of average flowing-through time on basis of index compensation

Average flowing-through time is an important scheduling index to which enterprises pay attention. When a dispatching method based on soft computing and the like is used for optimizing dispatch, global simulation is required to be carried out on a dispatching strategy to obtain a corresponding average flowing-through time index; the process needs to be carried out several times; the process consumes longer time if used for building an accurate simulation model for a whole larger scale production line as well as used for global simulation on the dispatching strategy; thus, quick prediction of the average flowing-through time index has the important meaning for improving the performance of the dispatching algorithm. The invention discloses a quick prediction method of average flowing-through time on basis of index compensation, which divides a machine group into a bottleneck machine group and a non-bottleneck machine group so as to loosen the working capability of the non-bottleneck machine group to build a simplified dispatching model; then, an SVM (support vector machine) is used for obtaining the compensation relationship between the corresponding average flowing-through time indexes of the simplified dispatching model and a non-simplified dispatching model, thus realizing the quick prediction of the average flowing-through time index.
Owner:TSINGHUA UNIV

Spectrum MUSIC method for achieving uniform linear array by means of root computing of real polynomials

The invention belongs to the technical field of radar signal processing, and particularly relates to a spectrum MUSIC method for achieving a uniform linear array by means of root computing of real polynomials. The spectrum MUSIC method includes the following steps of (1) computing coefficient vectors of the complex polynomials, (2) computing a window vector, (3) computing coefficients of the polynomials of all intervals, and (4) computing extreme values of MUSIC spectrums. According to the method, the coefficient vectors of the complex polynomials are computed quickly through Fourier transformation, the method of computing the extremities of the MUSIC spectrums is changed into the method of computing roots of multiple sets of low-order polynomials, and windowing Fourier transformation is carried out on related vectors of a signal subspace so that the coefficients of all the sets of the polynomials can be obtained. The defects that in the prior art, elaborate angle searching algorithms are needed, computation complexity is high and value stability is poor are overcome, and the method has the advantages that computation complexity is low and value stability is good and has great potential in estimation of the direction of arrival in low complexity.
Owner:XIDIAN UNIV

Method for monitoring current sensor angular difference online based on kernel independent component analysis

The invention relates to the technical field of current signal high-precision separation and angular difference measurement, and in particular discloses a method for monitoring current sensor angular difference online based on kernel independent component analysis. The method comprises the following steps: inputting a sine-wave current test signal and normal working current into a current sensor together, and sampling a mixed signal output by the current sensor to obtain a mixed sampled signal; inputting the mixed sampled signal into a signal separation module which removes mean values of and whitens the mixed sampled signal, and applies the kernel independent component analysis to extract a test signal from the mixed sampled signal; and inputting the former sine-wave current test signal and the extracted test signal into an angular difference comparison module together, wherein the angular difference comparison module performs angular difference computation and calibrates the angular differences according to the result of the computation. The method uses a soft computing mode to achieve online calibration and check on the angular difference of the current sensor, and the algorithm has the advantages of high separation precision, good robustness and the like.
Owner:INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI

Construction method of boundary forest model, multi-working-condition soft computing model updating method for complex industrial process and application thereof

The invention discloses a construction method of a boundary forest model, a multi-working-condition soft computing model updating method for a complex industrial process and an application thereof, belonging to the field of computer application. In order to solve the problem that prediction values are unreliable due to the fact that leaf nodes of a tree integration model easily generate blank areas in an output range, when a current training set under a certain working condition is known, the construction method comprises the steps: setting different leaf node minimum sample numbers, and establishing K tree integration models with different leaf node boundaries by using different leaf node minimum samples; predicting output values of all samples in the current training set by using a treeintegration model, and forming a prediction matrix by the predicted output values; according to the prediction output value of the prediction matrix, constructing a correlation matrix of the prediction output value and a real output value; and calculating a fusion weight vector, using the weight vector, and fusing the tree integration models with different boundaries into a boundary forest model,so that the leaf nodes of different tree models cover each other, and the blank area of a single tree on an output boundary is filled, and a reliable prediction value is generated.
Owner:DONGBEI UNIVERSITY OF FINANCE AND ECONOMICS

Method for monitoring current sensor angular difference online based on kernel independent component analysis

The invention relates to the technical field of current signal high-precision separation and angular difference measurement, and in particular discloses a method for monitoring current sensor angular difference online based on kernel independent component analysis. The method comprises the following steps: inputting a sine-wave current test signal and normal working current into a current sensor together, and sampling a mixed signal output by the current sensor to obtain a mixed sampled signal; inputting the mixed sampled signal into a signal separation module which removes mean values of andwhitens the mixed sampled signal, and applies the kernel independent component analysis to extract a test signal from the mixed sampled signal; and inputting the former sine-wave current test signal and the extracted test signal into an angular difference comparison module together, wherein the angular difference comparison module performs angular difference computation and calibrates the angulardifferences according to the result of the computation. The method uses a soft computing mode to achieve online calibration and check on the angular difference of the current sensor, and the algorithmhas the advantages of high separation precision, good robustness and the like.
Owner:INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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