9 results about "MATLAB" patented technology

The invention discloses a finished car control model simulation method which can be used for reducing the establishment time of a simulation environment, improving the efficiency and simulating input signals including digital quantity, simulation quantity, a PMW signal and a CAN (controller area network) bus signal. The method comprises the following steps of (1) inputting the analog quantity, the digital quantity and the PWM input signal needed by a finished car control model through a signal builder, a MAT file or an Excel file of the Matlab (matrix laboratory); (2) storing and observing the analog quantity, the digital quantity and the PWM signal in a feedback signal through a scope, display or a MAT file; (3) exchanging an input/output signal of the CAN bus of the finished car control model with the Matlab via CANoe through a vector CANoe tool box.

The invention discloses a VCG-based method for formulating a dynamic fault recovery strategy of an active distribution network. The method comprises the following steps of designing a multi-agent system structure for fault recovery of the distribution network; obtaining fault recovery information and dynamically dividing recovery time; building a VCG-based dynamic fault two-layer recovery model ofthe active distribution network; designing a VCG electricity auction mechanism model; and carrying out simulation analysis on a calculating example by using matlab software. According to the method,the solving dimension can be reduced and the rapidity requirement can be met; the condition that active users compete for limited power resources to purse best interests in a fault of the distributionnetwork can also be met; and meanwhile, an algorithm for guiding the users to rationally bid is given.

The invention relates to a method for performing weight analysis on main control factors of logging parameters in a water-oil-gas reservoir. The method is characterized by comprising the following steps: 1, collecting and sorting various characteristic parameters measured by each single technology in geochemical logging, collecting oil testing conclusions corresponding to each group of characteristic parameters, and then cleaning and verifying integrated data; 2, performing standardized processing; 3, writing a ReliefF characteristic selecting program by using Matlab software, and establishinga ReliefF algorithm model for geochemical logging measurement analysis; 4, inputting standardized data into the ReliefF algorithm model, and calculating weight values of the various characteristic parameters measured by the single technology by using the RelefF algorithm model; 5, setting thresholds, screening characteristic subsets, and extracting geochemical logging sensitive parameters. The method and a gray correlation analysis method have different emphases; by the method, the defects of the gray correlation analysis method in the weight analysis are overcome; the method belongs to supervised learning.

The invention provides an incidence matrix operation-based rapid decomposition method coefficient matrix calculating method. The method is characterized by calculating a modified equation coefficientmatrix B' and an incidence matrix through matrix operation. The method comprises the steps of reading a first node number array I, an end node number array J and a reactance array X of each branch; forming n*1-order sparse matrixes AS and AE according to node and branch connection relations; calculating a node-branch incidence matrix A; calculating a branch susceptance array BB; forming a branch susceptance diagonal matrix BBD; calculating a modified equation coefficient matrix B' through the node-branch incidence matrix A and the branch susceptance diagonal matrix BBD. The method is implemented on a Matlab platform and enables scientific and technological personnel to test and analyze calculation results conveniently by using various tools and functions provided by the Matlab. The methodreduces program codes, simplifies programming and makes programs more clear; the modified equation coefficient matrix B' is calculated completely by using matrix operation, so that the calculation speed is greatly increased.

A 5G millimeter wave power amplifier linearization simulation method is disclosed, which exhibits universality. When a digital predistortion algorithm adopted by engineers or researchers is not suitable for the power amplifier model or some parameters in the digital predistortion algorithm are unreasonable, the simulation results of power amplifier circuit in ADS will directly and concretely get the result that the linearity is not improved or even deteriorated. By using ADS and MATLAB, the invention helps engineers to check the capability of the designed power splitting amplifier and the corresponding digital predistortion algorithm, and helps them to optimize the digital predistortion algorithm.

The invention discloses a method for quickly generating a programmable logic control function block code, which comprises the following steps of: establishing a mathematical model, and compiling a corresponding performance function based on Simulink in Matlab software; creating the mathematical model into a subsystem, and then carrying out subsystem parameter configuration; carrying out system compatibility detection on the mathematical model, and building a simulation model of the controlled object on the basis of passing the detection; according to the simulation model, using simulation of Simulink to obtain an optimal solution of a control algorithm; according to a controlled object controller development environment, a programmable logic control function block code is generated from a control algorithm; and then the code is imported into a controller development environment of the controlled object, and software and hardware debugging is carried out until the actual requirements and functions of the controlled object are realized. According to the technical scheme provided by the invention, a reference can be provided for compiling a complex algorithm of the programmable logic controller based on a powerful computing power and a flexible programming mode of the Matlab, and the system design and debugging time is shortened.

The invention discloses a single-ended direct-current distribution line single-pole grounding fault distance measurement method, and belongs to the technical field of high-voltage direct-current distribution. The objective of the invention is to realize rapid and accurate positioning and distance measurement when a feeder line where a load is located has a single-pole grounding short circuit. According to the main scheme, a distance measuring module is arranged at each of the head ends of a positive feeder line and a negative feeder line to measure the distance of a fault feeder line, and the two distance measuring modules are used for measuring current waveforms to perform least square fitting to obtain respective corresponding parameters, and the parameters are substituted into a theoretical fault measuring distance formula for calculation. The method not only overcomes the defects that a traditional distance measurement method is inaccurate in measurement result and has no compatibility for a long line, but also improves the measurement accuracy, can enable a fault to be accurately positioned within the range of 40m, has remarkable superiority, and is suitable for popularization and application. A single-ended direct current power distribution network simulation model based on a modular multilevel converter (MMC) is built on MATLAB/PSCAD, and the reliability and remarkable superiority of the distance measurement method are verified.

The invention discloses an engineering investigation quality fine evaluation method based on a PageRank algorithm. The engineering investigation quality fine evaluation method comprises the followingsteps: determining a mutual influence relationship among various factors; listing all mutual influence relation tables; establishing a mutual influence relation matrix A of each influence factor basedon a PageRank algorithm; normalizing the matrix A; carrying out transposition processing on the normalized matrix; calculating the maximum eigenvalue lambda = 1 of the transition probability matrix by using a mathematical calculation tool Matlab to obtain the value of the eigenvector A; obtaining a weight sorting table of each influence factor; summarizing a drilling quality grade table of each influence factor of drilling; establishing a quality evaluation set of each influence factor; establishing a drilling quality evaluation membership matrix R of each influence factor; establishing a weight vector A; and establishing an evaluation matrix B = A * R, and evaluating the quality grade of the drilled hole by adopting a maximum membership principle. The engineering investigation quality fine evaluation method based on the PageRank algorithm has the advantages of objective evaluation, accurate result, data quantitative support and the like, and the influence of subjective factors is greatly reduced.