61 results about "Linear coupling" patented technology

The invention provides a digital twinning application-oriented electrical equipment electromagnetic heat flow coupling rapid calculation method, and belongs to the technical field of electrical digital data processing.The method comprises the steps that firstly, a three-dimensional model of electrical equipment is acquired and preprocessed, and a full-order electromagnetic heat flow coupling calculation model is established and verified through a temperature rise test; generating an experimental point matrix by using a Latin hypercube sampling method, and constructing a current temperature power density relational data set; performing regional division on the power density field by applying a K-means clustering algorithm, and constructing an electromagnetic response surface model through a radial basis function; establishing a heat flow field order reduction model based on an intrinsic orthogonal decomposition technology, and extracting a dominant mode primary function; bidirectional coupling of an electromagnetic field and a heat flow field reduced-order model is achieved, an improved Lagrange multiplier method and a fixed point iteration method are adopted for processing the nonlinear coupling problem, finally, a software development kit supporting an open platform communication unified architecture protocol is packaged, and the electromagnetic heat flow coupling rapid calculation capacity needed by digital twinning application is achieved.

The invention discloses a high-precision dynamic error real-time compensation method based on five-axis linkage, and relates to the technical field of machine manufacturing, and the method comprises the following steps: multi-source dynamic error perception: collecting geometric errors of a machine tool through a grating ruler, collecting temperature field distribution through an infrared thermal imager, and collecting cutting force disturbance through a piezoelectric force sensor; the method comprises the steps of constructing a grating ruler, constructing a thermal infrared imager, constructing a multi-source data acquisition system, carrying out nonlinear coupling modeling, and establishing a dynamic error model based on improved Volterra series, and has the advantages that the multi-source data acquisition system is constructed through the grating ruler, the thermal infrared imager and the piezoelectric force sensor, geometric, thermal and force multi-source dynamic errors are sensed synchronously, and the dynamic error detection accuracy is improved. The nonlinear coupling characteristic of the thermal-force-geometric error is accurately quantified by combining an improved Volterra series model and Lyapunov exponent analysis, the problem that a traditional single-source error model cannot accurately describe a complex error field is solved, and the accuracy of error prediction is remarkably improved.

The invention discloses an industrial multi-source heterogeneous data feature fusion and dynamic modeling method and system, and relates to the technical field of industrial multi-source heterogeneous data processing, and the system comprises a data collection module, an event triggering type local space-time alignment module, a time sequence data set generation module, a feature fusion module and an industrial equipment state model generation module. According to the method, an event-triggered local space-time alignment module is arranged, an event-driven dynamic space-time anchoring mechanism is adopted, and in a preset tolerant time window, an image feature time sequence is constructed through industrial camera superframe sampling to be matched with sensor time sequence data, so that feature dislocation caused by sampling frequency difference is avoided; compared with an existing interpolation method, the non-linear coupling relation between the process parameter data and the sensor time sequence data is obtained, and the problem of feature fusion distortion caused by the time granularity difference is solved by performing non-linear interpolation on the process parameter data through Gaussian process regression and generating a continuous proxy curve synchronous with the sensor time sequence data.

The invention relates to the technical field of multi-physics coupling, in particular to a multi-physics field coupling parameterized model establishment method, which comprises the following steps of: establishing a basic equation of each physics field through a physical law and a mathematical principle, and embedding coupling parameters in the equation to describe an interaction relationship among the multiple physics fields to form a coupling equation set; further adopting a finite element method or a finite difference method to solve the model, improving the calculation precision of an interface area through an adaptive grid encryption technology, and combining sensitivity analysis, a gradient descent method or a genetic algorithm to carry out iterative optimization on key parameters; the accuracy of the model is verified through comparison of an experiment and a simulation result, and if a significant difference exists, nonlinear coupling parameters are dynamically adjusted, so that calibration and reliability improvement of the model are realized. Through the reasonable method and steps, an accurate and reliable parameterized model with practical application value is established, so that the complex multi-physics field coupling problem is better understood and solved, and the calculation efficiency is improved.

The invention discloses a dual-wavelength mode-locked laser generating device and a dual-wavelength mode-locked laser generating method, and belongs to the technical field of optical communication, and the dual-wavelength mode-locked laser generating device comprises a pumping source, an optical integration module, a gain optical fiber, a saturable absorber and a dual-wavelength pulse independent polarization mode linear coupling regulation and control structure, linear coupling strength of cross-polarization components in two wavelength pulses is independently regulated and controlled by using a structure of a polarization controller and a polarization maintaining optical fiber, and dual-wavelength mode-locked pulse laser of different types of pulse combinations can be obtained. The coherent pulse light source with unique spectral characteristics can provide a low-cost light source for the fields of high repetition frequency optical combs, all-fiber architecture high repetition frequency soliton sequences and microwave photonics.

The invention belongs to the technical field of nonlinear position and attitude control of a side-rotor unmanned aerial vehicle, and aims to improve the strong nonlinear coupling effect, rotor slip flow interference and anti-interference capability of external unknown wind interference of the side-rotor unmanned aerial vehicle in a helicopter mode and realize high-precision position and attitude tracking control of the side-rotor unmanned aerial vehicle. Therefore, the technical scheme adopted by the invention is as follows: according to the adaptive robust control method for the side-rotor unmanned aerial vehicle, a nonlinear control strategy under a three-dimensional track of the side-rotor unmanned aerial vehicle is constructed by utilizing an adaptive backstepping method and robust integral symbol error control, and the nonlinear control strategy is divided into a position loop control strategy and an attitude loop control strategy; wherein a position loop control strategy is constructed by using an adaptive backstepping method, and an attitude loop control strategy is constructed by using robust integral symbol error control. The method is mainly applied to the manufacturing occasion of the side rotor unmanned aerial vehicle.

An apparatus comprises: a first layer (451); a second layer (452) over the first layer (451), wherein the second layer (452) comprises a magnetic material; a third layer (453) over the second layer (452); a first winding with a first shape in the first layer (451), wherein the first winding is electrically conductive; and a second winding with a second shape in the third layer (453), wherein the second winding is electrically conductive, and wherein the second shape is an inverse of the first shape.

The present application relates to a kind of pre-tensioned steel wire rope lateral impact response calculation method considering geometric and friction nonlinear coupling.First, the linear tensile constitutive model of pre-tensioned steel wire rope is constructed, Von Kármán large deflection theory is introduced, and the geometric hardening relationship of the nonlinear growth of axial tension with lateral deflection is established;Subsequently, a bilinear bending stiffness model is constructed to calculate the critical anti-sliding torque that evolves dynamically with tension;Based on the principle of energy conservation and Rayleigh-Ritz method, the system total potential energy functional of axial tensile potential energy and nonlinear bending potential energy is constructed, and the maximum impact deflection and tension response of the steel wire rope are obtained by solving the energy residual equation, the maximum response is substituted back into the constitutive equation, and the maximum nominal stress of the midspan cross section, the maximum axial tension and the extension length of the internal slip zone are calculated.The present application has very high calculation efficiency compared with full-size finite element simulation, and is suitable for the rapid design and safety evaluation of steel wire rope protection system.

The invention discloses a self-adaptive complex network fixed time synchronization method based on periodic intermittent control, and relates to the technical field of complex network synchronization control, and the self-adaptive complex network synchronization method comprises the steps: building a complex dynamic network model comprising a plurality of same linear coupling nodes, and enabling the coupling strength between the nodes to change along with the time; generating a synchronous error dynamic model according to a synchronous state equation and the complex dynamic network model; according to the rule that the coupling strength changes along with time, a periodic intermittent controller with fixed time is arranged; the periodic intermittent controller acts on the complex dynamic network model, so that the error between the complex dynamic network model and the synchronous state equation within a fixed time is close to zero. According to the invention, coupling cost can be reduced, energy consumption can be reduced, and network synchronization efficiency can be improved.

Systems and methods for a datacenter cooling system are disclosed. In at least one embodiment, a quick disconnect (QD) adapter can be associated with a mating rotational coupler of a rack-mounted coolant distribution unit (CDU) by a rotational action on a rotational coupler of a first side of a QD adapter and can be associated with a mating QD coupler of at least one cooling loop by a linear action on a linear coupler of a second side a QD adapter.

The invention discloses a rock permeability prediction method, a medium, equipment and a product, and relates to the technical field of permeability prediction.The method comprises the steps that multi-dimensional logging characteristics are obtained; constructing a Pearson's correlation coefficient matrix thermodynamic diagram to quantify the linear coupling strength of the multi-dimensional logging characteristics and the permeability, obtaining the correlation coefficient of the logging characteristics and the permeability of each dimension, screening the logging characteristics from the multi-dimensional logging characteristics according to the correlation coefficient, and constructing a characteristic matrix; building a parallel permeability model and a vertical permeability model based on a table prior data fitting network, training the parallel permeability model by using the feature matrix, splicing the parallel permeability predicted by the trained parallel permeability model as a new feature to the feature matrix, and training the vertical permeability model by using the spliced feature matrix; and predicting the rock permeability by using the trained parallel permeability model and vertical permeability model. The method can solve the problems that an existing method has high requirements for data quantity and quality and is weak in model generalization ability.

The application discloses a method for realizing optical wave and terahertz near-zero refractive index based on a nonlinear mixed waveguide, and steps are as follows: thin film lithium niobate is selected as a nonlinear material to process a mixed waveguide; a one-dimensional corrugated waveguide is used on the mixed waveguide to show a Dirac point-like dispersion characteristic at a Gamma point; an average nonlinear coupling coefficient of the mixed waveguide is calculated, and the quality factor of the zero-refractive-index waveguide is optimized by adjusting the thickness and period of the thin film lithium niobate; hollow rectangular metal waveguides are arranged around the thin film lithium niobate waveguide, and are used for guiding the propagation of terahertz waves and enhancing the nonlinear interaction in the difference frequency process; and the near-zero refractive index of various terahertz frequencies is realized by changing the width of the hollow rectangular metal waveguide. By jointly designing the nonlinear mixed waveguide of the terahertz and optical wave near-zero refractive index, the problems of phase mismatch and weak nonlinear interaction of the conversion of the optical wave to the terahertz wave are solved, so that the efficient conversion of the optical wave to the terahertz wave across the wave band is realized through on-chip optical difference frequency.

The invention discloses a staggered inductive coupling feeding ultrahigh-frequency tag antenna attached to a metal surface, which belongs to the technical field of tag antennas and comprises a dielectric substrate, a conductive layer printed on the dielectric substrate and a tag IC (integrated circuit) chip arranged on the conductive layer. The conductive layer comprises a linear feed unit and a linear coupling unit; the linear feed unit comprises two mutually symmetrical horizontal feed strip lines and first vertical open-circuit stubs respectively arranged on the outer sides of the two horizontal feed strip lines; the tag IC chip is arranged at the central position of the inner side of the two horizontal feed strip lines; the linear coupling unit comprises two mutually symmetrical horizontal coupling strip lines, second vertical open-circuit stubs arranged on the inner sides of the two horizontal coupling strip lines respectively, two coupling broadband lines connected with the two horizontal coupling strip lines, and two rectangular defects etched in the coupling broadband lines respectively. The problems that the scheme is complex and the cost is high when an ultrahigh-frequency tag antenna overcomes a metal structure are solved.

This invention relates to the field of non-electric variable regulation technology and discloses a method for regulating reaction parameters in the production of semiconductor-grade electronic hydrofluoric acid. The method includes: acquiring temperature and mass flow rate data of the reaction system; extracting the transient phase difference between the temperature and flow rate differential signals using phase difference tracking logic to characterize the nonlinear physical resistance fluctuations of the fluid; dynamically scheduling the nonlinear coupling coefficient based on the temperature deviation to identify the system error state; correcting the reaction enthalpy change coefficient using the transient phase difference, determining the feedforward compensation control quantity and superimposing it with the feedback control quantity, and outputting control commands for the fluid regulation actuator. This invention achieves compensation for fluid resistance through high-frequency signal phase decoupling, and, combined with an error state-based adaptive switching mechanism, improves the anti-disturbance stability and steady-state convergence accuracy of the purification process.

The invention discloses a polling attitude control method and device for a double-layer coaxial eight-rotor unmanned aerial vehicle, and relates to the technical field of unmanned aerial vehicle polling. The device consists of a double-layer coaxial eight-rotor aircraft body structure, a power system, a flight controller and a redundant attitude sensor module, and is constructed by adopting a symmetrically distributed double-layer coaxial eight-rotor architecture. The characteristics of high stability and strong power output of the traditional eight rotors are reserved, and the characteristics of maneuverability, flexibility and quick response of a miniaturized unmanned aerial vehicle are achieved. A litsea rotundifolia algorithm improved by a target function, an optimization allocation strategy and a hyper-parameter constraint strategy is introduced into the flight controller, and optimization adjustment is performed on HOD, CFO and MCC hyper-parameters of a model compensation controller, so that the compensation capability of an attitude controller on system nonlinear coupling and external disturbance is enhanced. The redundant attitude sensor module integrates double attitude sensors and outputs attitude data cooperatively and complementarily. The attitude response and control precision of unmanned aerial vehicle inspection in a complex environment is improved.

The invention discloses a radio frequency relay optimization design method fusing big language model priori knowledge and Kriging-IAGA. The method comprises the following steps: firstly, screening out key structure parameters and material parameters which influence insertion loss through HFSS simulation and single factor analysis; then constructing a sample library by using a method of combining single factor analysis with an orthogonal experiment, and establishing a high-precision Kriging agent model; further introducing an improved IAGA to carry out multi-parameter collaborative global optimization, and adopting an HFSS to regularly check and correct the proxy model; lLM is further introduced to serve as a process constraint device, an electromagnetic performance-process implementation dual evaluation system is constructed, semantic scoring is conducted on manufacturability of an optimal solution through the LLM, and a fitness function is corrected. According to the method, the problems of long simulation period, difficulty in processing nonlinear coupling in an orthogonal test and the like in the traditional relay optimization design are solved, the insertion loss of a high frequency band is effectively reduced, and the consistency and radio frequency performance of a product are improved.

Method for stabilizing a non-linear parametric amplifier array comprising N non-linear resonator modes, linear and non-linear couplings between sites, external coherent control fields on each site and input / output ports to send and retrieve an amplified signal; the method comprising: setting the phases of the external coherent control fields to grow linearly with site index, dividing the N sites of the array in 3 regions, setting, in the central region, an homogeneous steady-state solution, assuming periodic boundary conditions, and setting the central quantities to produce directional topological amplification in an homogeneous system; in the left and right buffer regions, imposing to some quantities a smoothly increasing or decreasing profile function from the boundaries to the center; choosing external coherent control frequencies or bare resonator frequencies to locally compensate for the photon number-dependent frequency shifts induced by non-linearities; and solving the exact steady-state mean-field displacements assuming open boundary conditions.

The application relates to a bearing radial clearance state monitoring method and device in a gear-shaft-bearing system. The method comprises the following steps: arranging an acceleration sensor at a position close to the bearing of a gear box of a gear-shaft-bearing-box fourteen-degree-of-freedom nonlinear coupling vibration system, continuously collecting vibration time domain signals of the system at different running moments, carrying out detrending and filtering processing on the vibration time domain signals, and obtaining pretreated signals; carrying out discrete Fourier transform on the pretreated signals, obtaining modulation signal bispectrum based on traditional bispectrum expansion; carrying out carrier frequency normalization processing on the modulation signal bispectrum, obtaining nine groups of MSB-SE amplitudes, superimposing the nine groups of MSB-SE amplitudes on (1, 2, 3) x GMF on (1, 2, 3) x BPFO, obtaining MSB-SE comprehensive indexes of each moment for monitoring the bearing radial clearance, drawing a curve of the indexes changing with running time, and determining a bearing radial clearance monitoring result. The accurate and online monitoring of the bearing radial clearance is realized.

The invention relates to the technical field of dam safety monitoring, and discloses a dam displacement detection method based on a sensing system. A two-dimensional rectangular coordinate system is established on an upstream inclined plane, two-channel reflection FBGs are arranged according to row and column intervals, and the sensitive direction is consistent with a bus; according to the reference working condition, dual-channel initial wavelengths are collected, and strain and temperature sensitivity coefficients are calibrated; in the monitoring period, real-time wavelength is obtained, relative drift is calculated, and axial strain and temperature change of each node are obtained based on dual-channel linear coupling decoupling; the axial displacement is converted according to the strain and the effective pasting length; performing normalized weight interpolation on node coordinates and displacement, constructing a two-dimensional displacement field and solving a spatial derivative; identifying abnormity according to a gradient modulus and an uncertainty threshold value; and packaging and uploading node displacement, abnormal coordinates and interpolation parameters according to a period to form a time sequence file.

The invention relates to the technical field of quantum noise measurement, in particular to a method for quickly calculating quantum noise in a microcavity soliton optical frequency comb. The method comprises the following steps: establishing a dynamic stability analysis model of solitons in a microcavity system, and solving a steady-state solution; identifying stability characteristics of the steady-state soliton solution in the disturbance space based on the solved steady-state solution; constructing a noise physical model of solitons in the micro-cavity system, wherein the noise physical model is used for evaluating the noise performance of a single soliton micro-comb; calculating the power spectrum density based on the solved steady-state solution and the noise performance of the single soliton micro comb; and solving the noise of the quantum in the soliton optical frequency comb in the microcavity system. According to the method, modeling is carried out on a timing jitter mechanism caused by quantum noise, and a time domain nonlinear coupling system is mapped to a modal feature space. The solution carried out in the feature domain not only improves the calculation precision, but also enhances the numerical stability and rapid convergence capability of the algorithm.

The invention relates to a composite material transient moisture-heat behavior measuring and calculating method based on a moisture-heat coupling model, and the method comprises the steps: obtaining to-be-measured physical data of a uniform graphite epoxy composite material, the to-be-measured physical data comprising temperature, humidity and internal heat; inputting to-be-measured physical data into a moisture-heat coupling model based on an internal heat source to obtain transient moisture-heat behaviors of the uniform graphite epoxy composite material in an isotropic cylinder under the action of the internal heat source; the step of constructing the moisture-heat coupling model comprises the steps that dimensionless form conversion is carried out on a linear coupling model containing internal heat and a moisture source, parameters L1 and L2 are introduced into the model obtained after dimensionless form conversion, new functions h1 and h2 are used for replacing the model parameters, a satisfaction condition is determined, Hankel transformation and Laplace transformation are carried out on the satisfaction condition, and the moisture-heat coupling model is obtained. And obtaining a moisture-heat coupling model.

This invention discloses a multi-axis random load fatigue damage prediction method incorporating a cross-attention mechanism. The method includes a data processing stage: acquiring multi-axis random load signals and preprocessing them; aligning load signals from different axes according to time steps to obtain multi-axis time-series data segments; converting the preprocessed multi-axis time-series data segments into a high-dimensional feature representation that can be processed by the model; inputting the high-dimensional features into a Transformer encoder and introducing a cross-attention mechanism; the Transformer encoder ultimately outputs multi-axis fused time-series features; and inputting the S3 multi-axis fused time-series features into a fully connected layer to obtain fatigue damage. By introducing a cross-attention mechanism to dynamically model the coupling relationship between multi-axis loads, the method can automatically learn the contribution weights of different load components to fatigue damage, achieving high-precision prediction of fatigue damage under multi-axis random load conditions. This avoids information loss and can characterize the temporal nonlinear coupling effect, thereby significantly improving prediction accuracy and generalization ability.

The application relates to a low-profile dual-polarized waveguide slot array antenna unit, belonging to the technical field of dual-polarized antennas, and solves the problems of high profile and large weight of the dual-polarized antennas in the prior art. The low-profile dual-polarized waveguide slot array antenna unit is arranged in sequence from top to bottom as follows: radiation slots, a resonant cavity, cross coupling slots, a first feeding waveguide, a linear coupling slot and a second feeding waveguide; the radiation slots are arranged above the resonant cavity; the radiation slots are shared by four and form a 2*2 array. The antenna unit has the advantages of low profile, wide working bandwidth and high radiation efficiency.

The utility model discloses a linear coupler, which relates to the technical field of couplings and comprises a first shaft sleeve component, a second shaft sleeve component, two connecting blocks, a connecting component and a screw rod, the second shaft sleeve component is arranged in the linear extension direction of the first shaft sleeve component, and the two connecting blocks are respectively clamped at the opposite ends of the first shaft sleeve component and the second shaft sleeve component. The connecting assembly is meshed between the first shaft sleeve assembly and the second shaft sleeve assembly and used for linear deviation compensation of the coupler, and the multiple screws are used for connecting the two connecting blocks with the first shaft sleeve assembly and the second shaft sleeve assembly. Through the arrangement mode that the first shaft sleeve assembly, the second shaft sleeve assembly and the connecting assembly are matched, installation and maintenance of the rotating shaft are facilitated, axial and radial deviation are effectively absorbed, elastic deviation compensation is achieved, vibration is reduced, slippage among the first shaft sleeve assembly, the second shaft sleeve assembly and the connecting assembly can be achieved, and operation is stable; the use stability of the coupler is improved.

To provide a lateral pressure measuring apparatus and a method for measuring lateral pressure capable of improving the measurement accuracy of lateral pressure by reducing the influence of hysteresis caused by frictional force on the output of a bridge circuit connected to a strain gauge.SOLUTION: A lateral pressure measuring apparatus 10 includes: (A) a plurality of bridge circuits including strain gauges (a plate-surface strain gauge 60 and a hole strain gauge 70) for measuring strain of a wheel 40; (B) a coupling coefficient determination unit 120 configured to determine linear combination coefficients for outputs from the plurality of bridge circuits, the outputs including hysteresis that differs between an increase and a decrease in lateral pressure; and (C) a lateral pressure estimation unit 130 configured to calculate the estimated value of a lateral pressure Q by computing the weighted sum of the outputs from the plurality of bridge circuits using the linear combination coefficients determined by the coupling coefficient determination unit 120, (D) the plurality of bridge circuits being combined in such a manner that the lateral pressure Q and a frictional force can be separated.SELECTED DRAWING: Figure 1

The invention relates to a multi-axial fatigue prediction method and medium based on non-linear coupling of normal and shear strain energy, and the method comprises the steps: calculating the normal strain and tangential strain of each group of experimental results at each angle under a loaded condition by using the fatigue experimental results of a to-be-predicted material, finding out the plane where the maximum shear strain amplitude of the maximum normal strain is located, and calculating the maximum shear strain amplitude of the maximum normal strain; taking as a critical surface; calculating each stress-strain component on the critical surface; acquiring material and shear performance parameters of a to-be-predicted material, and predicting by adopting the fatigue prediction model in combination with each stress-strain component; the model building process comprises the following steps: performing nonlinear coupling on normal strain energy and shear strain energy, obtaining a fatigue damage parameter by combining an average normal stress correction coefficient and an average tangential stress sensitivity coefficient, and obtaining a fatigue prediction model by combining the fatigue damage parameter with a fatigue damage equation in a shear form. Compared with the prior art, the method has the advantages of being high in fatigue life prediction precision, suitable for proportional and non-proportional loading, high in safety and the like.

A distributed MPC control method for an arrayed wave energy conversion device comprises the following steps that a centralized motion model and a state space model of a whole WEC array are established, and the linear coupling relation of all subsystems among the state, control input and wave exciting force is determined; establishing a coupling influence model containing adjacent subsystems and a subsystem partition model; each subsystem takes global energy maximization as a common target, and introduces local control input and local displacement constraint conditions to carry out local optimization; an iterative algorithm is adopted to coordinate control input of each subsystem, and iterative solution and information interaction are realized; s4, a plurality of sampling moments are set, the step S4 is repeated at each sampling moment, control input is updated in real time, each subsystem is converged to a feasible and appropriate optimal solution at each sampling moment, and it is ensured that the device adapts to wave change and array interaction.

The invention provides a three-dimensional nonlinear magnetic material equivalent circuit model and a test method, and is applied to the technical field of power electronics. According to the model, a current source module applies bias current and excitation current to a nonlinear coupling packaging module; a plurality of node ports of the nonlinear coupling packaging module are connected with physical coupling nodes of a plurality of nonlinear coupling devices; the mapping sub-module maps the plurality of physical coupling nodes and the plurality of nonlinear coupling devices, constructs an analog nonlinear coupling circuit according to a connection coupling relation between the linear damping module and the plurality of nonlinear coupling devices, and responds to an applied bias current and an excitation current, so that the nonlinear coupling circuit is simulated. The analog nonlinear inductance unit is coupled to generate an analog induced voltage, and the analog induced voltage is applied to the linear damping module and other analog nonlinear devices through a plurality of node ports to reproduce a magnetic domain rotation coupling effect and an anisotropic hysteresis effect; the linear damping module responds to the analog induced voltage and reproduces a damping effect in combination with the analog nonlinear resistor unit.

The invention discloses a bandwidth limited system T-S fuzzy sliding mode control method based on an adaptive WTOD protocol, and belongs to the technical field of industrial control and intelligent manufacturing. The method comprises the following steps: establishing a T-S fuzzy networked system model containing time-varying and time-lag; designing a self-adaptive WTOD transmission protocol integrated with a uniform quantization mechanism; constructing a fuzzy sliding mode controller based on the available system state information; giving out discrimination conditions for ensuring that the indexes of the T-S fuzzy networked system are bounded and the sliding mode surface is reachable in an inequality group form; converting an inequality group discrimination condition containing linear coupling into a minimization problem by adopting cone complementary linearization; and optimizing the final upper bound of the closed-loop system state and the upper bound of the sliding mode surface reaching neighborhood based on a particle swarm algorithm. According to the method, the cooperative improvement of the control performance and the communication efficiency is ensured, and a verifiable and easy-to-implement unified analysis and design framework is provided for the bandwidth-limited networked nonlinear system.

The invention discloses a TDOA / FDOA passive positioning method based on an alternating direction multiplier method. The method comprises the following steps: firstly, carrying out initial estimation on a target position and speed by utilizing a weighted least square method; then, performing first-order Taylor expansion on the nonlinear geometric constraint at the initial point, and reconstructing an original non-convex optimization problem into a constraint weighted least square model with linear coupling constraint; finally, an ADMM framework is introduced, and efficient decoupling solution of position and speed variables is achieved by alternately updating the target position, the speed and the Lagrange multiplier. The system, the device and the medium are used for realizing the TDOA / FDOA passive positioning method based on the alternating direction multiplier method. According to the method, the problem that traditional nonlinear optimization is prone to falling into local optimum is effectively solved, the positioning precision is remarkably improved, meanwhile, the calculation complexity is greatly reduced, and the robustness and the real-time performance of the algorithm under the conditions of low signal-to-noise ratio and complex observation are enhanced.