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Transmission characteristic parameter identification method for ball screw feeding system
PendingCN122084260AAchieve complete identificationimprove accuracyMachine gearing/transmission testingDynamo-electric machine testingComputation complexityFriction torque
A transmission characteristic parameter identification method for a ball screw feeding system comprises the following steps: in the normal operation process of the ball screw feeding system, acquiring voltage, current, rotating speed and other signals through a servo motor and a driving system thereof, and realizing online identification of key electromagnetic parameters and mechanical parameters in stages; under the static working condition of the motor, controlled voltage excitation is applied, stator current is measured, and identification of stator winding resistance and stator inductance is completed; under the steady-state operation condition, the flux linkage amplitude of the permanent magnet is calculated based on a q-axis voltage equation; under a dynamic operation condition, a friction torque model is established through segmented constant-speed operation, a rotor motion equation is combined, a recursive least square algorithm with a forgetting factor is introduced, and online identification of the equivalent rotational inertia of the system is realized; according to the method, complete and accurate transmission characteristic parameters can be obtained in the ball screw feeding system, the identification process is stable, the calculation complexity is low, and the method is suitable for being embedded into a servo control system.
Owner:XI AN JIAOTONG UNIV
Unmanned aerial vehicle communication system based on ipv6 multi-homing and multi-path transmission
ActiveCN122053483BOutstanding core advantagesImprove adaptabilityCommunications systemUncrewed vehicle
The application belongs to the technical field of unmanned aerial vehicle communication, and particularly relates to an unmanned aerial vehicle communication system based on IPv6 multi-homing and multi-path transmission. The system configures independent IPv6 addresses for multiple heterogeneous links of the unmanned aerial vehicle, establishes a binding relationship between the links and the addresses, and generates a service session identifier; address-level state vectors are generated by periodically collecting link state parameters and associating the link state parameters with the IPv6 addresses; the available IPv6 addresses are comprehensively scored based on the state vectors, and the sending proportion of each address is determined according to the service category, so that data fragments are bound to different IPv6 source addresses and sent in parallel; when the link deteriorates, address-level degradation and rapid traffic switching are performed without changing the session identifier; the receiving end uniformly recombines the fragments from the multiple addresses according to the session identifier and the fragment sequence number, and delivers the fragments to the upper layer application. The application improves the communication throughput, stability and continuity of the unmanned aerial vehicle in a multi-link environment.
Owner:SUZHOU UNIV
Injection-production regulation and control method, device and equipment
PendingCN121803209Aavoid shockStrong engineering feasibilityFluid removalNeural learning methodsControl engineeringProcess engineering
Owner:CHINA NAT PETROLEUM CORP +1
A city engineering planning method based on unmanned aerial vehicle remote sensing surveying and mapping
The application discloses a kind of urban engineering planning methods based on unmanned aerial vehicle remote sensing surveying and mapping, it is related to unmanned aerial vehicle remote sensing surveying and mapping technical field, including the gradient amplitude is mapped as exponential growth difficulty value, form terrain traffic difficulty field, based on obstacle binary graph, calculate each grid point to the Euclidean distance of nearest obstacle grid, and calculate reciprocal, defined as obstacle repulsion potential field, combine terrain traffic difficulty field and obstacle repulsion potential field, construct steady-state diffusion equation, solve steady-state diffusion equation using Gauss-Seidel iteration method, obtain dynamic cost surface;Generation optimal path sequence, based on optimal path sequence constructs three-dimensional engineering entity model.The application is combined by NDVI vegetation identification and DSM morphological operation, enhances the extraction accuracy of urban ground feature obstacle, is combined by terrain difficulty field mapped by slope index and obstacle repulsion potential field, improves the continuity and physical rationality of cost field construction.
Owner:SHANDONG SHENGDA GEOGRAPHIC INFORMATION SURVEYING & MAPPING ENG CO LTD
Long-time fire suppression system and control method for circulating fluidized bed boiler
PendingCN122650354AWhen the pressure fire is extended without decouplingsatisfy depthCombustionFlue gas
The application discloses a long-time fire-out system and control method of a circulating fluidized bed boiler, which comprises a combustion and circulation system, a tail flue system, an energy storage and release system and a measuring and controlling device. The tail flue system is communicated with the water-vapor pipeline and the flue gas pipeline of the combustion and circulation system through pipelines. The water-vapor pipeline of the combustion and circulation system is communicated with a steam turbine. The energy storage and release system is arranged in the combustion and circulation system and can store and release at least part of high-temperature medium. The measuring and controlling device is arranged on the pipeline connecting the combustion and circulation system and the steam turbine. The scheme can effectively solve the technical bottleneck that the steam turbine cannot be operated for a long time without being disassembled due to the rapid attenuation of main steam parameters in the fire-out peak regulation process of the existing CFB unit. By introducing the high-temperature ash energy storage and release mechanism, the heat energy maintaining capacity of the CFB boiler under the fire-out state is remarkably improved, so that the duration of the near-zero output (≤2% load) of the steam turbine is prolonged.
Owner:DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
A method for calibrating a linear array camera scale factor and translation based on a rotating stage
PendingCN122657256ALow installation requirementsSimplify machine commissioning
The application discloses a kind of line array camera proportion coefficient and translation amount calibration method based on rotating platform, belong to machine vision calibration technical field.Method includes: through line array camera acquisition synchronous following rotating platform rotation's calibration board image, each line image of line array camera acquisition and rotating platform's rotation angle one-to-one correspondence;Calibration board is circular and at least 2 groups of round holes are set, the position of round hole is symmetrical relative to the center of calibration board and physical size is known;According to the physical size of round hole on calibration board and the pixel size of round hole in image, the proportion coefficient of line array camera is calculated;Using rotation angle and the center of round hole in the conversion relationship between rotating platform coordinate system and camera coordinate system, solve horizontal axis translation and vertical axis translation;The application does not need to accurately align the center of calibration board and rotating platform center, and the calibration process is simple, efficient, with the advantages of good robustness, high precision.
Owner:NORTHEASTERN UNIV CHINA
Method for evaluating life of super capacitor energy storage under fire storage frequency modulation working condition
ActiveCN121562456BSolve the problem of poor adaptability to frequency modulation working conditionsMeet frequency modulation refined operation and maintenance needsDesign optimisation/simulationAlarmsCapacitanceElectric power system
The application discloses a super capacitor energy storage life evaluation method under frequency modulation working condition of thermal storage, relates to the technical field of energy storage of power systems, and can at least partially solve the problems of poor adaptability of existing super capacitor life evaluation methods to frequency modulation working condition, insufficient quantification of multi-factor coupling, and lack of engineering criteria. The application comprises simulating the frequency modulation working condition of thermal storage and collecting multi-dimensional operation data of the super capacitor; pre-processing the collected data and extracting life characteristic parameters such as capacity attenuation rate, equivalent C rate, average temperature rise and frequency modulation load factor; screening key influencing factors by correlation analysis and training weight coefficients through a machine learning algorithm to construct a coupling influence coefficient model; establishing a capacity attenuation equation, an equivalent series resistance growth equation and a response delay growth equation to determine the life end point by fusing the three criteria; and dynamically correcting model parameters based on real-time frequency modulation data and calculating the remaining life. The application realizes accurate evaluation and dynamic prediction of the life of the super capacitor under the frequency modulation working condition of thermal storage.
Owner:XIAN THERMAL POWER RES INST CO LTD
Intelligent vehicle target detection method and system based on federated learning
This invention proposes an intrinsically safe adaptive training method and system for vehicle-to-everything (V2X) object detection based on federated learning. By introducing a dynamic label adjustment mechanism at the candidate box level at vehicle-end nodes, feature-related label errors are gradually corrected. Simultaneously, on a cloud server, based on a unified verification environment, the model update results of each vehicle-end node are comprehensively evaluated for quality, and the model aggregation strategy is dynamically adjusted according to the evaluation results, thereby adaptively controlling the update direction of the global model. Through the synergistic effect of local training optimization at vehicle-end nodes and performance feedback adjustment from the cloud server, the system constructs a continuously running intrinsically safe closed-loop optimization process, enabling the perception model to converge stably even under conditions of differences in vehicle data distribution and label quality, effectively improving the robustness and environmental adaptability of distributed object detection collaborative training in V2X.
Owner:SHANGHAI UNIV +1
A sintering control process for improving lead and cadmium leaching rate of ceramic glaze
This invention discloses a sintering control process for improving the lead and cadmium leaching rate of ceramic glazes, relating to the field of daily-use ceramic manufacturing technology. The process includes: determining the characteristic dielectric frequency of the glaze to be fired at its critical melting temperature, where the characteristic dielectric frequency corresponds to the frequency of synergistic polarization between lead or cadmium ions and glass network forging ions; heating the product to the critical melting temperature and holding it at that temperature, applying an intermittent pulsed electric field with a frequency equal to the characteristic dielectric frequency; after stopping the electric field, subjecting the glaze melt to temperature cycling treatment, applying periodic temperature fluctuations at a reference temperature; and after the last half-cycle of cooling, rapidly cooling through the glass transition temperature zone, followed by slow cooling to room temperature. This invention, through the synergistic control of characteristic frequency electric field writing, temperature cycling screening, and gradient rapid freezing, significantly reduces the lead and cadmium leaching rate of the glaze surface without changing the glaze formulation, increasing the maximum firing temperature, or extending the production cycle.
Owner:JINGDEZHEN YATE CERAMICS CO LTD