63 results about "Wind model" patented technology

Embodiments include apparatus and methods for determining link level wind factors and providing routes for drones based on the wind factors. At least a portion of the route corresponds to airspace above a road network. Wind factor values are assigned to a range of altitudes of drone air space above a road link of the road network based on a wind model and stored in a database. The wind model is applied to a location based on wind condition data and three-dimensional (3D) features from 3D map data associated with the location. The route is optimized based on the determined wind factors.

The invention relates to an anti-wind self-adaptive compensation method for a large antenna. The anti-wind self-adaptive compensation method for the large antenna is characterized by at least including the first step of establishing an accurate random wind load model at the position of the antenna, the second step of establishing a control-oriented model containing flexible information of the antenna, the third step of carrying out simulation on the established wind model and an antenna model, obtaining the flexible oscillation information of the antenna and calculating pointing errors, the fourth step of further predicting the pointing errors according to the Kalman filtering mode, wherein the prediction time equals the sum of an inertia time constant of a motor and an inertia time constant of a filter, the fifth step of designing a low-pass filter, solving a transfer function of the antenna model and a motor reducer model, and carrying out backstepping calculation on a predicted value to obtain a feedforward control signal, and the sixth step of feeding forward feedforward control voltage to a control system so as to enable the controlled model to produce a rigid rotation angle to offset the pointing errors caused by flexible oscillation. Through the method, pointing accuracy, electrical performance and work efficiency of the antenna are improved.

The invention provides a wind turbine generator control system hardware in-loop simulation and test platform. The platform comprises a computer equipped with GH Bladed software, an RTDS, a communication PLC and a control system of a wind turbine generator, wherein a wind model of the wind turbine generator, a mechanical model and a pneumatic model are established in the GH Bladed software, an electrical model of the wind turbine generator is established in the RTDS, an electric power electronic switch model is employed to support current transformer controller hardware in-loop simulation, bidirectional real-time communication between the GH Bladed software and the RTDS is realized through the communication PLC, the control system of the wind turbine generator employs a control system configuration of an actual fan blower, is realized through employing a physical controller and comprises a main control PLC and a current transformer controller, a main control algorithm of the wind turbine generator is operated through the main control PLC, and same functions as an actual set main controller are performed; a current transformer control algorithm is operated through the current transformer controller, and pulse width modulation pulses of a current transformer and a protection circuit of the current transformer are outputted. The platform is advantaged in that the platform can be used for testing commercial main controllers and current transformer controllers.

The invention provides a calculation method of transformer harmonic loss based on a frequency conversion property. The calculation method is characterized by comprising a direct-current resistance loss of a transformer winding under a non-linear loading condition and other stray losses of the transformer winding under the non-linear loading condition, calculating an eddy-current loss correction factor of the transformer winding, modeling the transformer by the transformer harmonic loss based on the frequency conversion property and the like, and calculating and analyzing the harmonic loss. The method provided by the invention has the advantage of accuracy of loss calculation of the transformer under the non-linear loading condition; compared with the traditional harmonic calculation method, on the basis of analyzing the frequency conversion property of a winding model, the harmonic loss is corrected by considering an overlapping calculation of an equivalent non-linear parameter of each subharmonic lower winding and the harmonic loss; therefore, the calculation method has the advantages of stronger adaptability and higher actual application value.

The invention discloses a method for rendering a large-scale realistic snowscape in real time on a stream processor. According to the method, a snowflake model, a motion model of the snowflake model in the snowfall process, a random wind model generated through Perlin noise, and a snow accumulating and melting model are involved. The method is characterized in that the movement speed of wind is divided into average wind speed and random wind speed, calculation of a wind field is simplified, calculation results of the random wind speed are stored in 3D textures, a particle system based on a CPU is set up, and the 3D textures are used, so that the calculation loads of the particle system are reduced, and the rendering efficiency of the particle system is improved. The reality sense of the visual effect and the rendering efficiency are taken as the main research object, and the rendering method has the advantages of being high in speed, high in simulation degree and good in platform compatibility.

The invention discloses an experimental method for insulation wetting and aging evaluation research of winding models. Firstly, an experimental platform is set up; secondly, winding models with different wetting and aging degrees are prepared; thirdly, a frequency-domain dielectric spectrum curve database of the different wetting and aging degrees of the winding models at reference temperature isobtained; fourthly, frequency-domain dielectric spectrum test and reduction is carried out on a winding model within unknown wetting and aging degree; fifthly, the similarity between the frequency-domain dielectric spectrum test result and the frequency-domain dielectric spectrum curves in the database is calculated; and finally, the wetting degree and aging degree of the unknown winding model areobtained. According to the experimental method, a frequency-domain dielectric spectrum curve database of the different wetting and aging degrees of the winding models is established to evaluate the wetting degree and aging degree of windings, and a reference can be provided for the evaluation research of the wetting degree and aging degree of transformer windings.

The invention relates to a method for establishing tethered captured satellite dynamic models through adding flexibility and fuel sloshing. The method comprises the following steps of: firstly determining parameters and a degree of freedom of a captured satellite, and establishing a sailboard flexibility and liquid sloshing-considered satellite attitude dynamic model by utilizing the Newton's second law and the Lagrange principle; and determining parameters and a degree of freedom of a mechanical arm, and establishing a tether winding model. The method has the beneficial effects of embodying the influences, on the attitude, of sailboard flexible vibration and residual fuel sloshing of non-cooperative targets, and embodying the change of tether length in the winding process so as to analyze the influences, on the tether tension, of the winding; and by adoption of a strategy of carrying out attitude takeover and control through moving a tether connection point, dynamic response of the mechanical arm and required control force can be provided.

The invention belongs to the wind modeling technical field and relates to a modeling method considering that wind speed has randomness and fuzziness double-uncertainty characteristics. The method includes the following steps that: 1) quality evaluation and basic processing are performed on original data; 2) wind speed probability distribution characteristics are extracted from actually measured wind speed data at a specific area, a probability distribution model which is suitable for fitting actually measured wind speed is analyzed and determined; (3) the fuzzy uncertainty characteristic and membership function characteristic of wind speed probability distribution parameters are extracted and analyzed; and 4) procedures and steps for generating simulation wind speed based on random fuzzy simulation technology and inverse transformation method simulation are rendered. The method of the invention not only covers traditional wind speed probability uncertainty characteristics, but also considers the objective reality that wind speed is not clear in limited wind speed data fitting, and can depict multiple uncertain characteristics of wind speed more comprehensively and provide corresponding guidance for power generation plan arrangement and scheduling operation mode adjustment of a large-scale wind power connected power system in the future.

A method for the guidance of a rotorcraft (1) in relation to a landing point (Pp) in accordance with a landing procedure. An approach route (R) is identified and an approach trajectory (T) is calculated in accordance with a ground slope (S) imposed by the approach route (R). An upstream segment (Sam) of the approach trajectory (T) is calculated through the application of a typical trajectory, as defined in accordance with the ground slope (S), the current mass of the rotorcraft (1), and a low-noise or noise-abatement criterion relating to the noise discomfort generated by the rotorcraft (1), taking into consideration a wind model (V) that represents the change in the wind between a current position of the rotorcraft (1) and the landing point (Pp). The position of the rotorcraft (1) is adjusted in proximity to the landing point (Pp) along the length of a transitional segment (St) of the approach trajectory (T), excluding, from the extension of the transitional segment (St), an application of the typical trajectory, and taking into consideration the ability of the rotorcraft (1) to perform a rapid maneuver toward a downstream segment (Sav) of the approach trajectory (T), as predefined in accordance with the ability of the rotorcraft (1) to reach the landing point (Pp) during stable flight.

Methods and systems for the design and execution of an aerospace or aeronautic system are provided. The aerospace or aeronautic system may incorporate planetary environment models and models of equations of motion. The planetary environment models mathematically represent planetary environment specifications, such as atmosphere and wind. Atmosphere models include standard day atmosphere models and non-standard day atmosphere models, and wind models include continuous wind turbulence models and discrete wind turbulence models. The models of equations of motion include models of three-degree-of-freedom equations of motion with variable mass and models for six-degree-of-freedom equations of motion with variable mass. As a result, the present invention can design and execute a target system more accurately than the conventional system that provides only standard day planetary environment models, continuous wind turbulence models, or fixed mass equations of motion models.

The invention provides a wind generating set yaw system and variable-pitch system refinement real-time simulation platform and method. The method comprises the following steps: establishing a wind model, a mechanical portion model, a pneumatic model and a yaw system mechanical portion model of a wind generating set in GH Bladed software; establishing an electrical portion model, a variable-pitch system model and a yaw system electrical and control portion model of the wind generating set in an RTDS, wherein the variable-pitch system model comprises a variable-pitch control unit, a variable-pitch motor and frequency converter main circuit and a variable-pitch execution mechanism, and the yaw system electrical and control portion model comprises a yaw control unit and a yaw motor and frequency converter main circuit; and carrying out real-time variable interaction and communication between the GH Bladed software and the RTDS so as to realize complete real-time enclosed-loop simulation. According to the invention, a wind generating set whole-machine model at a variable-pitch dynamic state and a yaw dynamic state is taken into detailed consideration, research needs of a variable-pitch system and a yaw system can be well satisfied, and the accuracy is improved.

Several species of bacteria capable of invasive infections, such as S. pyogenes, S. equi and P. multocida, contain hyaluronic acid (HA) in their capsules. Bacterial species such as Staphylococcus aureus and related Staphylococci have capsules that contain acidic polysaccharides. Bacterial capsule or bacterial surface binding peptides were synthesized and tested in a culture model of invasive bacterial infections, specifically translocation through polarized keratinocyte cultures. The peptides reduced the translocation of a variety of bacterial species, with a concomitant increase in bacterial internalization by the keratinocytes. In vivo, subcutaneous inoculation of encapsulated GAS treated with peptides delayed bacterial dissemination. In a mouse surgical wound model infected with S. aureus, treatment with peptides reduced the numbers of bacteria and inflammation at the wound site.

The invention discloses a full-automatic working condition generation method and device used for wind turbine generator load calculation. The method includes the following steps that firstly, a middle parameter and a wind model parameter are calculated; secondly, a basic Bladed model file is selected, and a constant value parameter in the wind model parameter and the middle parameter is substituted; thirdly, according to a variable in the basic Bladed model file, a series of working condition variable value sets are generated; fourthly, new Bladed model file data are generated for each working condition variable value set with the basic Bladed model file as a template; fifthly, the data are saved according to specified routes and working condition file names. The device comprises a middle parameter and wind model parameter generation module, a model file import module, a working condition variable value set circulating generation module, a variable searching and modifying module and a working condition file saving module. By means of the method and device, the working condition setting process is simplified, working conditions are generated full automatically, operation is easy and quick, reliability is good, and accuracy is high.

The invention discloses a construction method for taper-changeable composite fiber winding models. According to the construction method, coordinates of positioning control points on winding fibers in a three-dimensional space are calculated according to a normalized curvilinear equation, and modeling of composite fiber winding products is realized by combining a three-dimensional modeling software solid feature operation method; the problems that mutual fiber interference among three-dimensional solid models of spring layer / striding circle positions during fiber winding simulation is caused and the control points need to be corrected to avoid the interference are solved; the construction method can construct the fiber winding models with any filament winding lengths, and the models have high similarity to actual fiber winding products; the fiber winding models have wide range of adaptability to taper of winding mandrel bodies and high dimensional accuracy. By the construction method, the fiber winding products as required can be automatically generated according to parameters inputted by users, and design efficiency is improved; fiber interference and intersection conditions, including spring layer intersection and circle change intersection, during winding of fibrous composite products can be simulated to the greatest extent; the three-dimensional models of the fiber winding products have high similarity to the actual products in terms of boundary dimension.

A method, apparatus, system, article of manufacture, and computer readable storage medium provide the ability to measure wind. Data at a first resolution (i.e., low resolution data) is collected by a satellite scatterometer. Thin slices of the data are determined. A collocation of the data slices are determined at each grid cell center to obtain ensembles of collocated data slices. Each ensemble of collocated data slices is decomposed into a mean part and a fluctuating part. The data is reconstructed at a second resolution from the mean part and a residue of the fluctuating part. A wind measurement is determined from the data at the second resolution using a wind model function. A description of the wind measurement is output.

A method, apparatus, system, article of manufacture, and computer readable storage medium provide the ability to measure wind. Data at a first resolution (i.e., low resolution data) is collected by a satellite scatterometer. Thin slices of the data are determined. A collocation of the data slices are determined at each grid cell center to obtain ensembles of collocated data slices. Each ensemble of collocated data slices is decomposed into a mean part and a fluctuating part. The data is reconstructed at a second resolution from the mean part and a residue of the fluctuating part. A wind measurement is determined from the data at the second resolution using a wind model function. A description of the wind measurement is output.

An embodiment of invention provides a method for building an equivalent short circuit model of an ultrahigh-voltage transformer. The method comprises the steps of determining the ultrahigh-voltage transformer needed to be subjected to equivalent model design, and building a winding model having the same volume size reduction and coil forms as the ultrahigh-voltage transformer; and establishing a three-column type iron core, and concentrically mounting a high-voltage winding, a medium-voltage winding and a low-voltage winding in the winding model to the iron core in a sleeving manner. The coil form of the winding model is set according to a preset anti-short-circuit capability demand, so that the coil form of the winding model can be specifically configured according to the demand; the simulation of the ultrahigh-voltage transformer is reduced by adopting a stress and safety coefficient physical quantity equivalence principle; and the technical problems that an existing high-voltage large-capacity product of 500kV and above does not have a test capability and is high in test cost and a model meeting equivalent design requirements cannot be built can be solved. An embodiment of the invention furthermore provides an apparatus for building the equivalent short circuit model of the ultrahigh-voltage transformer.

The invention provides a comprehensive real-time simulation platform for a large wind turbine generator, and the platform comprises the steps: building a wind model, a mechanical part model and a pneumatic model of the wind turbine generator through GH Bladed software, and carrying out the signal interaction through GH hardware test software, so as to achieve the simulation. An electrical part model of a wind turbine generator is constructed through RT-lab software, real-time calculation of a nanosecond-step motor and a three-level topology can be achieved, hardware-in-loop real-time simulation of a converter controller can be achieved, a main controller PLC operates a main control algorithm of the wind turbine generator, the converter controller operates a converter control algorithm, signal interaction is carried out among the model simulation, a main controller PLC and a converter controller through an ADS communication IO interface, and comprehensive real-time simulation tests such as starting of a control unit, grid connection, monitoring, protection, fault diagnosis, yawing, variable pitch, converter power instruction, shutdown, converter network side and machine test control, low penetration and high penetration control and the like can be carried out.

The invention relates to a method for designing low-altitude wind shear models by means of fusing vortex rings and discrete gust models. The method includes designing micro-downburst models and the discrete gust models. The method includes steps of firstly, establishing the vortex rings in runway coordinate systems; secondly, determining vortex ring centers, vortex ring radiuses and central perpendicular wind speeds to obtain vortex ring models with fixed vortex ring central intensity; thirdly, configuring mirror vortex rings; fourthly, importing the discrete gust models; fifthly, adjusting gust gradients of the gust models imported at the fourth step; sixthly, adjusting the relative locations of the centers of the gust models and the centers of the vortex rings so that the magnitude of wind shear central intensity can be changed at any moment, and the magnitude of the intensity of integral wind shear wind fields can be simulated. Runway entrances are used as origins of the runway coordinate systems, and approach directions are used as +XR axes of the runway coordinate systems. The method has the advantages that the wind shear models can be designed by means of fusing the vortex rings and the discrete gust models, and the magnitude of the vortex ring central wind speeds of the wind shear models can be changed along with change of the time.

A winding model of transformer winding comprises large flatbread model and small flatbread model with slots on outer diameter for both. The coil winding method includes fixing both said models, winding lead - out wire A on small model first, winding wire onto large model by transition wire A, winding coil top and botto section on large model, winding wire onto small model by tranmsition wire B, winding coil top and bottom section on small model to form lead - out wire B in parallel to lead - out wire A, tying up and fixing coil sections separately.

A blender. It is mainly used in container equipment used in cell culture in biological fermentation, pharmaceutical and other process fields. It consists of a stirring paddle system composed of blades, connecting rods, and shaft sleeves, a motor, and a stirring shaft. The blades that make up the stirring paddle system are "ten" windmills, and the ends of the blades each have a tilt with an acute angle of 45 degrees, and the tilt is parallel to the same "ten" connecting the bisector of the top angle. Due to the use of such a blade structure, when the motor drives the stirring shaft and the stirring paddle system to run clockwise, the blades also rotate clockwise and gently touch the cells in the mixture under the action of the liquid's stress, so as to achieve uniform stirring and make cells from damage. One set of stirring paddles has two sets of left and right symmetrical blades. In order to further achieve the effect of stirring evenly, the agitator has two sets of stirring paddles up and down.

The invention relates to a semi-physical simulation platform of a variable pitch motor of a wind turbine generator, which comprises a real-time simulator, a controller, a load module and an oscilloscope, the real-time simulator is respectively connected with the controller, the load module and the oscilloscope, and an inverter model and a variable pitch motor model are stored in the real-time simulator; a wind turbine generator pitch control algorithm is stored in the controller, a signal of the controller is transmitted to the inverter model, and the controller adopts the wind turbine generator pitch control algorithm to control the inverter model so as to control the pitch motor model; the load module is used for providing load data of the variable pitch motor model for the real-time simulator; and the oscilloscope is used for displaying the data waveform of the real-time simulator. Compared with the prior art, the method is more economical and convenient; non-real-time performance of offline simulation is overcome, time synchronization can be achieved, and real feedback data can be obtained; and the advantages of variable pitch bearing load data under different working conditions and different wind models and the like are considered.

The invention discloses a simulation model of the wire arrangement and reversing control system of the I-shaped wire take-up machine. The simulation model mainly includes two modules: a winding model of the I-shaped wire take-up machine and a wire arrangement and reversing control model; The winding model of the I-wheel take-up machine is established by analyzing the structure of the I-wheel take-up machine, and the winding process of the I-wheel is simulated and displayed by the limit approximation method; The winding flatness is then used as a reference to control the position of the reversing point of the cable arrangement; the reversing control model of the cable arrangement includes a control algorithm module, and various high-quality control algorithms can be used. The positive effect of the present invention is to provide a systematic theoretical support for the detailed analysis of the influence of the relevant parameters of the I-shaped wire take-up machine's wire arranging and reversing control system on the precision of the wire take-up, and provide a basis for the machine structure and the wire arranging and reversing control algorithm. Design and optimization provides a simulation experiment platform.

Embodiments include apparatus and methods for dispatching package delivery by aerial vehicles. The embodiments include a route module, a wind model, and a dispatcher. The route module is configured to generate a route for package delivery. The wind model configured to store wind factors associated with geographic areas and provide one or more wind factors associated with the route for package delivery. The dispatcher is configured to identify one or more aerial vehicles for assistance of package delivery in response to the one or more wind factors associated with the route and send a message to the one or more aerial vehicles.

The invention provides an on-line ultrasonic three-dimensional imaging monitoring method for transformer windings. The method comprises steps of: disposing an ultrasonic transmitting probe and an ultrasonic receiving probe on a transformer housing so that an ultrasonic wave is reflected at the measured points of a winding; according to a time difference between ultrasonic wave transmission and ultrasonic wave reception, a wave velocity, and the positions of the ultrasonic transmitting probe and the ultrasonic receiving probe, calculating winding distance and transforming measured point positions into coordinate values in a transformer winding model coordinate system, wherein the distance from the transformer housing at the ultrasonic transmitting probe to the measured point is used as a coordinate value of the measured point in an axis; obtaining the three-dimensional coordinate values of a plurality of measured points and generating a transformer winding three-dimensional image; and comparing the transformer winding three-dimensional image with a pre-established transformer winding three-dimensional model image to determine whether the transformer winding is deformed or not. The method can carry out on-line monitoring on the transformer without power outage to ensure safe and reliable operation, and can realize the quantitative and visual inspection and analysis of a transformer winding state.

The invention relates to the technical field of blowing models, and discloses a rudder mounting structure of a blowing model. A model body, a rudder piece, an angle change piece and an adjusting pieceare included, the model body and the rudder piece are mounted and cooperated basically via a shaft hole and a rudder shaft respectively, a containing groove is formed in the model body, so that the angle change piece can be positioned in cooperation with a matching groove in a positioning shaft of the rudder piece through the containing groove, and further the rudder piece is fixed and the angleis controlled. The adjusting piece is arranged behind the angle change piece, and can control the angle change piece by means of threads on the model body, concretely, fixedly positions the rudder piece by compressing the angle change piece and remove the angle change piece to dismount or replace the angle change piece. The mounting structure is novel in structure, reliable in installation, can greatly improve the rudder piece changing efficiency, satisfies requirement of change the state of the blowing model, and is high in structural precision, wide in changeable angle, simple in operation and easy to operate.

The invention relates to a method for supplying air according to crowd distribution. The distribution condition of crowds in the current area can be identified for air supply coverage, and the air supply is determined according to three steps. According to the method for supplying the air according to the crowd distribution, air supply work to all persons in a current area can be carried out through outlet air, and therefore the user experience and comfort are greatly improved. According to a fan for supplying the air according to the crowd distribution, the method for supplying the air according to the crowd distribution is adopted. By means of the fan, air supply work to all persons in the current area can be carried out through the outlet air. The fan outputs the air according to the comfortable wind model, so that the users are in the comfortable environment. Meanwhile, the fan has the functions of purification, heating and humidification, the occupied space is reduced, and the operation difficulty is reduced. The fan can realize automatic control according to the current environmental conditions, and the intelligence of the fan is greatly improved.