26results about How to "Solve the coupling problem" patented technology

The invention relates to the technical field of fluid control, and discloses a fluid control intelligent adjusting method and system for a micro-fluidic chip, and the method comprises the steps: carrying out the data collection of a self-adaptive fluid controller, a micro-fluidic channel pressure sensor array, a temperature sensor array and a flow sensor array based on the micro-fluidic chip; obtaining real-time fluid parameter monitoring data; performing feature extraction to obtain a multi-dimensional fluid feature matrix; establishing a three-dimensional fluid model of the microfluidic channel, and solving to obtain flow field distribution data; inputting the flow field distribution data into a Kriging agent model, establishing a mapping model of channel width, depth, length and fluid control performance, and calculating to obtain an optimal geometric parameter combination; and performing multi-level calculation on the fluid pressure uniformity, the temperature distribution uniformity and the flow stability to obtain a hierarchical fluid parameter control strategy. According to the invention, the problem of multi-physics field coupling is effectively solved, the calculation complexity of the control system is reduced, and the execution efficiency of the control strategy is improved.

The invention discloses a SiC MMC sub-module capacitor voltage fluctuation suppression method and system, and belongs to the technical field of electronic power. According to the analysis result of the optimal broadband harmonic circulation injection boundary and number of times of the SiC MMC sub-module, a sub-module capacitor voltage fluctuation optimization model for simultaneously injecting second, fourth and eighth harmonic circulation and third harmonic voltage is determined, and the characteristic of higher control bandwidth of the SiC MMC can be fully utilized; by solving a submodule capacitor voltage fluctuation optimization model, the amplitudes and phases of reference values of second, fourth and eighth harmonic circulation needing to be injected and the amplitude and phase of corresponding third harmonic voltage are determined, then the second, fourth and eighth harmonic circulation is injected, and the third harmonic voltage injection is combined to realize broadband harmonic combined injection. The capacitance voltage fluctuation of the sub-module is reduced, the capacitance voltage fluctuation suppression method for the SiC MMC sub-module is realized, and the suppression effect is relatively high.

The invention discloses a three-degree-of-freedom macro-micro composite piezoelectric nano probe station, and relates to the technical field of semiconductor manufacturing and biotechnology. In order to solve the technical problems that in the prior art, an existing motor-driven probe station is large in cooperative control difficulty, the positioning precision and the stability are difficult to consider, the structure is complex, and the energy consumption is high, the technical scheme provided by the invention is that the three-degree-of-freedom macro-micro composite piezoelectric nano probe station is provided. Comprising a probe bench surface, an XY macro-motion mechanism, an XY micro-motion mechanism and a Z-direction mechanism. The XY macro-motion mechanism comprises an X piezoelectric motor and a Y piezoelectric motor which are used for achieving dozens of millimeter level horizontal movement in the X-axis direction and the Y-axis direction respectively. The XY micro-motion mechanism is used for realizing accurate movement of several nanometers to dozens of nanometers in the X-axis direction and the Y-axis direction; the Z-direction mechanism is used for realizing dozens of microns of lifting in the Z-axis direction; the probe bench surface is used for bearing a bearing object and is also used for driving the bearing object to move along the X-axis and Y-axis directions. The device is suitable for semiconductor manufacturing and biotechnology testing work.

The invention provides a graph classification method based on a quantum graph attention network. The method comprises the following steps: step 1, converting graph data into a quantum state for quantum calculation through angle coding and amplitude coding; step 2, establishing a quantum linear mapper, and for a quantum state obtained by angle coding, using a group of alternative trainable parameter-containing quantum gates and CNOT gates to form a group of unitary gates # imgabs0 # to evolve the quantum state; 3, establishing a quantum graph attention layer, splicing the nodes in pairs when the attention coefficient between the nodes is calculated, and iteratively inputting the spliced nodes into the quantum graph attention layer; step 4, taking nodes with small influence on the target node as noise items and removing the noise items; and 5, image classification is carried out. According to the method, strict dependence on a graph structure is avoided, the processing requirement of large-scale graph data can be better met, the method is a universal circuit design method, and the processing efficiency and flexibility of the quantum graph neural network are remarkably improved.

The invention discloses a rotating speed flux linkage cascade robust control method and system for a permanent magnet motor system, and the method comprises the steps: firstly obtaining motor parameters of a permanent magnet motor, and then carrying out the observation of a system operation process through a composite discrete extended state observer; a rotating speed flux linkage cascade model-free predictive controller is built based on a super-local model, a lumped disturbance value estimated by the observer is input into the rotating speed flux linkage cascade model-free predictive controller, a q-axis flux linkage instruction value is output by a rotating speed ring through a given value and a response value, and a required dq-axis voltage instruction value is output by a flux linkage ring; and a pulse signal is generated to drive the permanent magnet motor after reverse Park conversion and an SVPWM modulation module. From a new angle of combination of inherent structure improvement of model predictive control and observer compensation, the problem of parameter mismatch of the permanent magnet motor system is solved, the dependence of the control system on a motor mathematical model is reduced, the influence caused by parameter perturbation and external disturbance is suppressed, and the control performance of the permanent magnet motor system is improved.

This invention discloses a live-line detection device and method for partial discharge in GIS (Gas Insulation System), relating to the field of live-line detection of power equipment. The equivalent capacitance between the primary and secondary windings of a current transformer coil is used as a pulse signal coupling channel. Two sets of pulse current signals within the high-voltage conductor of the GIS are acquired through these two pulse signal coupling channels. Then, the partial discharge voltage signal of a specified frequency is extracted through a pulse partial discharge detection circuit. The two extracted pulse signals are output to a differential mode comparison and acquisition module. This module compares the pulse signals input from the two channels, effectively eliminating interference signals. This invention simultaneously solves two problems in GIS live-line partial discharge pulse detection: pulse coupling and high-voltage side partial discharge interference during live operation. It achieves accurate detection of partial discharge during GIS operation, ensuring the safe and stable operation of GIS electrical equipment.

The invention discloses a high-speed heavy-load working condition bearing dynamic stiffness testing device and testing method, and relates to the field of bearing testing. The invention solves the problems that the existing bearing dynamic stiffness test technology and equipment only can load in a single direction, cannot simulate axial and radial composite loading, depends on contact transmission, is insufficient in heavy load bearing, lacks system vibration error suppression measures, and is poor in reliability. And the high-precision test requirement of the independent rolling bearing under the high-speed heavy-load composite working condition is difficult to meet. A shafting supporting module is arranged on the upper portion of a test bench support, a measuring module is located over the shafting supporting module, an axial loading module and a radial loading module apply axial force and radial force to a tested bearing respectively, and a driving module drives a supporting shaft and an inner ring of the tested bearing to rotate. Axial and radial composite loading under the high-speed heavy-load working condition can be achieved, axial and radial displacement can be monitored synchronously, system errors are reduced, and high-precision measurement of the dynamic stiffness of the bearing is achieved.

The invention discloses a flat field conversion system for a lobster eye lens, and belongs to the field of detection. The device comprises a light source, a lobster eye lens, a curved-surface optical fiber bundle, a relay lens group, a medium-wave infrared detector and a base. The lobster eye lens is used for receiving light projected by a detection object in a view field range. A light source is arranged at an edge field of view of a lobster eye lens, and the lobster eye lens, a curved optical fiber bundle, a relay lens group and a medium-wave infrared detector are coaxially fixed on a base in sequence from left to right. The lobster eye lens detects an object in an edge view field, medium-wave infrared light emitted by the object is converged on the front end face of the curved-surface optical fiber bundle through the lobster eye lens and performs primary imaging, and the curved-surface optical fiber bundle converts a bent image surface into a flat field and transmits the flat field to an object surface of the relay lens group. And the relay lens group transmits an image surface and performs cold diaphragm matching with the medium-wave infrared detector, so that the contradiction between a large view field and high resolution of the lobster eye lens is solved, and high-precision detection of the lobster eye system on a target at an edge view field is realized.

This invention discloses a method for controlling the downward speed deviation of a hydraulic press slide, belonging to the field of hydraulic press control technology. The method first collects real-time signals of slide position, main cylinder pressure, and oil temperature, and calculates the speed deviation. When the speed deviation continuously exceeds the limit, the system automatically switches from basic PID control to adaptive fuzzy PID control mode. In this mode, the system comprehensively considers the speed deviation, its rate of change, and pressure signals, determines the dominant disturbance type online according to preset rules, and generates targeted compensation commands accordingly. Through a multi-disturbance coordination strategy, the commands are output in an orderly manner to actuators such as proportional valves, cooling valves, and hydraulic pumps. The system monitors the speed deviation in a closed loop, achieving automatic mode recovery or abnormal protection. This invention achieves accurate identification and dynamic compensation of multiple disturbances, significantly improving the control accuracy, anti-interference capability, and system intelligence level of the slide speed.

The application discloses a control system design method for space gravitational wave detection. The method first performs modeling on a problem domain of the control system, constructs a first mapping matrix from a functional requirement to a behavior element, performs decoupling verification on the first mapping matrix until the first mapping matrix is in a lower triangular structure. Then, modeling is performed on a solution domain of the control system, a second mapping matrix from the behavior element to a design parameter is constructed, and independence verification is performed on the second mapping matrix until the second mapping matrix is in a lower triangular structure. Finally, a composite equivalent mapping matrix of the two-level matrix is calculated, and is used for change management of the control system. The application can realize formalized design and quantitative evaluation of a strong coupling control system architecture, identify coupling problems in an early design stage, improve design iteration efficiency and change management accuracy, and is mainly applied to control system design for space gravitational wave detection, and can also be applied to design scenes of various high-coupling high-precision space control systems.

The application discloses a kind of low-speed fixed-wing unmanned aerial vehicle longitudinal controllable field and stability analysis method, comprising: determining the desired working range of angle of attack and track inclination state;Angle of attack and track inclination expected value are substituted into trim calculation, and the trim elevator deflection, trim airspeed and trim thrust are obtained;With angle of attack as horizontal axis, track inclination as vertical axis, the trim elevator deflection, trim airspeed and trim thrust are expressed in the form of contour distribution, and the full-state trim contour distribution diagram is obtained;Introduce aircraft performance constraints and control constraints in the full-state trim contour distribution diagram, and obtain the controllable field;Select the desired working point in the controllable field, calculate the speed, angle of attack trend in the neighborhood of the working point, obtain the speed angle of attack phase diagram, and judge the stability of the working point through the speed angle of attack phase diagram.The application is applied to the technical field of unmanned aerial vehicle, has the advantages of low complexity of trim solution, strong result display intuitiveness and high application analysis efficiency.

The embodiment of the invention provides a data packaging method and device and a storage medium, and the method comprises the steps: receiving a data request sent by a data requester, and determining a plurality of target data sources according to the data request; respectively determining target business micro-services to which the plurality of target data sources belong, and obtaining a topological structure between the target business micro-services; according to the topological structure, packaging services corresponding to the target business micro-services are called in sequence to obtain target data from the target business micro-services, the target data are packaged into a target data structure, and the packaging services corresponding to different target business micro-services are mutually isolated; and sending the target data structure to the data requester. The data requester can obtain the required data without docking different business micro-services; the packaging logics are independently executed through the packaging services corresponding to different business micro-services, and the packaging services are independently developed and run, so that the problems of packaging code coupling and environment coupling during running of the different business micro-services are solved.

This invention discloses a broadband impedance measurement device for high-voltage systems and a voltage regulation method for its sub-modules. Each sub-module of the device consists of a cascaded H-bridge and a floating DC / DC converter connected in series on the DC side. One end of the cascaded H-bridge is connected to the current of each phase of the high-voltage system, and the AC side of the cascaded H-bridges in each sub-module is cascaded. The other end of the cascaded H-bridge is connected to the floating DC / DC converter. One end of the floating DC / DC converter is connected to the cascaded H-bridge, and the other end is floating. The device of this invention controls the energy balance on the bus capacitor of the cascaded H-bridge connected to the DC / DC converter in real time, so that the DC bus voltage remains stable when implementing current injection functions at different frequencies, thereby improving the impedance measurement effect. Through three-phase active and reactive power control, the energy loss on the floating side of the high-frequency DC / DC converter is compensated, a certain voltage range is maintained, and the voltage regulation and balance control effect between phases within the sub-module is improved.

The present invention relates to the technical field of composite material gas cylinder detection, and discloses an ultrasonic scanning detection device for composite material gas cylinders, including a rectangular support and a gas cylinder, wherein a stainless steel water tank is fixedly arranged in the rectangular support, slides are fixedly installed on the tops of the front and rear sides of the rectangular support, sliding sleeves are slidably arranged on the two slides, movable arms are fixedly installed on the outer walls of the two sliding sleeves, and the two movable arms are movably arranged on the inner wall of the stainless steel water tank; the stainless steel water tank is filled with water, a part of the gas cylinder floats on the water surface, and a part is immersed in the water, and an ultrasonic sensor is located directly below the gas cylinder, so that the ultrasonic sensor and the gas cylinder can be detected by water coupling, which overcomes the coupling problem of probe contact method detection and improves coupling accuracy. The present invention is novel in design, simple in structure, and has the advantages of high probe coupling degree and high detection efficiency.

The invention relates to the technical field of proton exchange membrane fuel cells, and discloses a method for estimating nonlinear parameters of a proton exchange membrane fuel cell based on a preset time estimator. According to the method, the output form of an electrochemical model of the proton exchange membrane fuel cell is converted into a linear system model through filtering operation, and a strong nonlinear system is rewritten into a linear parameterization form; a decoupled linearization system is obtained by defining an auxiliary variable and a decoupling algorithm, and the problem of system parameter coupling is solved; finally, preset time convergence of unknown nonlinear parameters in the model is achieved through a preset time parameter estimation method, online and rapid estimation of the nonlinear parameters of the proton exchange membrane fuel cell is achieved in the process, and the estimation speed of the nonlinear parameters is greatly increased; on-line estimation of unknown nonlinear parameters of the proton exchange membrane fuel cell can be realized only through input-output signals of an on-line measurement system.

The present invention relates to a millimeter wave switchable MIMO antenna unit, comprising a top layer, a first metal layer, a second metal layer, a third metal layer, a fourth metal layer and a bottom layer arranged in sequence from top to bottom, and also having through holes penetrating the six metal layers and four blind holes; the top layer contains 11 radio frequency switching chip patches, adopts a three-layer multiplexing structure, the first metal layer is a ground layer, the second metal layer is a control signal layer, the third metal layer is a power layer, and the fourth metal layer is a ground layer. A millimeter wave switchable MIMO antenna array comprises antenna units as above arranged in a 1×32 linear array, the polarization mode adopts vertical polarization, and the center frequency is 38.5GHZ. Compared with the prior art, the present invention has the advantages of small coupling, high reliability, clear and compact structure, high switching frequency, low cost, and can fit actual large-scale antenna base stations.

The invention relates to the technical field of chip manufacturing, in particular to a flip photodiode and a manufacturing method thereof.The flip photodiode comprises an epitaxial wafer, a reflecting layer and a lens layer, and a P electrode and an N electrode are arranged on the epitaxial wafer; the lens layer receives an optical signal from the laser, the epitaxial wafer absorbs the optical signal to generate an electric signal, and the electric signal is transmitted through the P electrode and the N electrode; the reflecting layer reflects the optical signal, so that the epitaxial wafer repeatedly absorbs the optical signal; a lens layer is corroded on the back surface of an epitaxial wafer, so that an optical signal enters from the back surface of the photodiode, and the coupling problem of the photodiode with light entering from the back surface and a laser is solved; and on the other hand, the reflecting layer is arranged on the front surface of the photodiode, so that after the optical signal transmitted from the lens layer is absorbed by the epitaxial wafer, the remaining optical signal can be reflected back by the reflecting layer to be continuously absorbed, the thickness of the absorbing layer in the epitaxial wafer is reduced, and the response speed is improved under the condition that the responsivity of the photodiode is not influenced.

This invention provides a method and system for assessing the adaptability of a satellite to the mechanical environment during long-distance transportation after propellant loading, belonging to the field of spacecraft mechanical environment engineering technology. This method aims to solve the challenge of assessing the structural safety and leakage risk of propellant-loaded satellites during long-distance transportation under the coupling of static pressure stress within the propellant tank and dynamic stress during transport. The method includes: establishing a model of the satellite and packaging system; defining the transportation mechanical environment conditions; analyzing and calculating random vibration fatigue strength and impact strength, predicting propellant leakage rate, and conducting a comprehensive assessment. This method employs the mean stress correction theory and the quasi-static transformation method to solve the coupling problem of static and dynamic stresses in fatigue analysis and impact strength verification, respectively, and predicts leakage risk by comparing acceleration response with ground test data. This invention can comprehensively assess the safety of propellant-loaded satellite transportation and supports the optimization of spacecraft development processes.

The invention discloses an optimization method for maximizing the energy efficiency of an IRS-assisted downlink URLLC system, comprising: assisting in constructing a multi-input single-output URLLC system on an intelligent reflecting surface; constructing a system energy efficiency maximization problem model to obtain a non-convex optimization problem; based on parameter substitution and problem conversion, converting the integer constraints and fractional constraints of the original problem into an easily tractable form; solving the variable coupling problem by an alternating optimization method, converting the non-convex problem into a convex optimization problem by using an SCA iterative algorithm and an SDR technology, and solving the convex optimization problem by using a BCD algorithm; obtaining a suboptimal solution of the multi-input single-output URLLC system parameter based on the generated iterative optimization variable values ​​and using the BCD iterative algorithm, and in the process of obtaining the suboptimal solution, obtaining the maximum energy efficiency of a single antenna user and the optimal solution of the reliability constraint by iteration; proposing an alternating optimization method to solve the variable coupling problem, and converting the non-convex constraint into a convex constraint by using the SCA algorithm and the SDR technology; and solving the local optimal solution based on the BCD iterative algorithm.

The invention provides a coordinate system correction and unification method for a reflective full-polarization imaging system. The method comprises the following steps: acquiring a muller matrix of an anisotropic column scattering phantom model through the reflective full-polarization imaging system; secondly, judging the state of the photon coordinate system by using the positive and negative of the photon coordinate system mark P, and determining the photon coordinate system as a unified system or a non-unified system; then, judging the specific configuration of the coordinate system by combining the state of the photon coordinate system and the positive and negative of a space coordinate system mark S; and finally, adjusting and correcting the coordinate system to a unified system according to all solutions and mutual conversion relations of the Muller matrix about coordinate system transformation so as to realize accurate decoding of polarization information. The method is suitable for various imaging and measuring systems related to the reflective polarization modulation technology, such as a two-photon full-polarization imaging system, a polarization endoscope and a full-polarization biosensor, effectively solves the coupling problem of a space coordinate system and a photon coordinate system, and improves the credibility and accuracy of information extraction.

The application belongs to the field of magnetic resonance sounding signal noise filtering, and is a kind of magnetic resonance sounding signal extraction method based on intelligent optimization manifold learning, the parameter group of the local linear embedding manifold learning method is initialized, the genetic algorithm in the intelligent optimization algorithm is used, the signal-to-noise ratio is taken as the fitness function, and the parameter group in the local linear embedding manifold learning method is optimized, the local linear embedding manifold learning method uses the optimized parameter group to sequentially perform first processing and second processing on the magnetic resonance sounding signal, removes random noise, and obtains the final denoised magnetic resonance sounding signal. The application effectively retains the signal characteristics through the nonlinear dimension reduction of manifold learning, avoids the information loss caused by frequency band selection, maintains the local relationship between data points in the dimension reduction process, ensures that adjacent points in m-dimensional space remain adjacent in d-dimensional space, only compresses and filters noise, and realizes signal extraction.

This invention discloses a tension decoupling control method for a dual-actuator, off-axis cooperative wire feeding system. The method includes: 1. System initialization; 2. Acquiring the current time. k 3. Obtain online identification of rotational inertia; 4. For the current time... k 5. Adaptively adjust the PID gain and decoupling coefficient to obtain the adjusted PID gain and decoupling coefficient; 6. Solve for speed deviation and tension deviation; 7. Perform PID calculation to obtain the current time. k 7. Obtain the decoupled drive speed output and braking tension output; 8. Perform push-pull feedforward correction to obtain the current time. k The final drive command and final braking air pressure command are received; return to step 2 to start the next cycle of control; until the end. This invention uses model-driven control to decouple and eliminate mutual interference, improve dynamic performance through feedforward, and adaptively respond to load changes, thereby achieving independent control of drive and braking.

The invention relates to a motor cross coupling effect identification and compensation method for a multi-degree-of-freedom forming robot. The method comprises the following steps: S1, establishing a kinematics model, a mechanical dynamics model, a permanent magnet synchronous motor dynamics model considering the cross coupling effect and an electromechanical coupling dynamics model of the multi-degree-of-freedom forming robot; s2, establishing a motor cross coupling angle identification model of the multi-degree-of-freedom forming robot in combination with an electromechanical coupling dynamic model; and S3, combining the electromechanical coupling dynamics model and the motor cross coupling angle identification model to establish a multi-degree-of-freedom forming robot dynamics feedback control model, wherein the multi-degree-of-freedom forming robot dynamics feedback control model comprises coupling field orientation control, load feedback control and dynamics feedback control. High-precision and high-efficiency forming of the thin-wall high-rib component is achieved, and the forming precision can be guaranteed on the premise that the forming speed is increased.

The invention relates to a multifunctional heat preservation box for simulating a soft rock shear rheological experiment shear box based on five-field coupling. The invention relates to the technical field of rock mechanics tests, in particular to a multifunctional heat preservation box applied to a THMC-B multi-field coupling shear rheological experimental instrument, which comprises a heat preservation box front part, and an internal electronic temperature display meter and heat preservation glass are mounted on the heat preservation box front part; the thermal insulation box rear part is fixed on the experimental instrument through a vertical steel column and a lateral steel column, a seepage field / chemical field water inlet and a seepage field / chemical field water outlet are formed in the rear part of the thermal insulation box rear part, holes for a horizontal static load electric cylinder, a horizontal dynamic load electric cylinder and a normal dynamic load electric cylinder are reserved in the whole thermal insulation box, and thermal insulation felt cloth is mounted at the openings. The device has the advantages that the device is easy to install and convenient to use, the heat preservation efficiency needed in a temperature field experiment is effectively improved, meanwhile, the temperature of the internal shear box can be detected in real time, and temperature measurement in the experiment is facilitated. Besides, compared with a traditional heat preservation box, the heat preservation box is designed through a novel composite multi-layer material, temperature dissipation and heat exchange of the heat preservation box are greatly reduced, and the heat preservation box has the advantage of being beneficial to popularization and test.

The invention discloses an automatic leveling device for milling plate parts and a control method thereof.The automatic leveling device comprises a base, the base is provided with an adjustable clamp and a fixed clamp, the base is further provided with a driver, a fixed supporting leg and an adjusting supporting leg, the adjusting supporting leg is provided with a pressure sensor, and the plate parts are clamped to the base through the adjustable clamp and the fixed clamp; the plate part makes contact with the pressure sensor, and the driver drives the adjusting supporting legs to ascend and descend so that leveling of the plate part can be achieved. The leveling cost of the plate parts is reduced, and the leveling reliability is improved. The structure of the adjusting supporting legs is used, so that the device adapts to the complex working scene of milling machining; the locking component is driven by the locking air cylinder, locking and unlocking of the adjusting supporting leg are achieved, and the reliability of the leveling device is enhanced. By means of the leveling device, the plate parts can be rapidly leveled, and the leveling efficiency and the machining precision of milling machining of the plate parts are improved.

The invention discloses a CEB waste heat recovery safety system and method based on the metal fiber surface combustion technology, the system comprises a CEB direct combustion device, a combined air inducing device, a waste heat recovery unit and a control unit, the combined air inducing device is arranged at the rear end of a smoke outlet of the CEB direct combustion device, and an air inducing channel and an emergency discharge channel are arranged in the combined air inducing device in parallel; the control unit monitors system pressure parameters in real time, controls the air inducing channel to be opened under the normal working condition, and introduces high-temperature flue gas into the waste heat recovery unit for heat energy recovery. When it is monitored that the pressure exceeds a safety threshold value, the combined air inducing device is immediately controlled to be switched to an emergency relief channel, smoke is directly exhausted into the atmosphere, and rapid pressure relief is achieved. By means of a double-channel switching mechanism of the combined air inducing device, the adaptability problem of CEB direct combustion equipment and a waste heat recovery system under the fluctuating load is effectively solved, and the safety of the CEB direct combustion equipment and the waste heat recovery system is improved. The device has efficient waste heat recovery and intrinsic safety protection capabilities, and is suitable for storage and transportation tank areas, loading platforms and other scenes where waste gas loads fluctuate severely.