62 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 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.

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.

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.

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.

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.

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 present invention relates to a method of determining the average wind speed in a vertical plane by use of a LiDAR sensor (2), comprising performing measurements (MES), constructing a measurement model (MOD M) and a wind model (MOD V), then using an adaptive Kalman filter (KAL) to determine the wind speed (v), and determining the average wind speed in the vertical plane being considered (RAWS).