89 results about "Wind simulation" patented technology

A wind turbine testing system is disclosed for testing at least a part of the nacelle components of a wind turbine system when mounted on a load carrying structure of a nacelle, said wind turbine testing system comprising a test bench being arranged to hold said load carrying structure including said nacelle components, a grid simulation system comprising a power converter system and a simulation controller being arranged to be electrically coupled to at least one of said nacelle components and being adapted for providing a simulated utility grid on the basis of a power supply and at least one control signal established by said simulation controller, and a wind simulation system comprising a wind turbine shaft rotating means arranged to be coupled to a rotating part of said generator system or a generator-related system of a nacelle or a part of a nacelle located in said test bench.

The invention discloses a virtual synchronous generator damping winding simulation method based on steady-state frequency difference value compensation. The virtual synchronous generator damping winding simulation method comprises the steps: enabling the damping winding to realize compensation of the difference value of the steady-state output frequency and the reference output frequency for a virtual synchronous generator through an PI regulator; in an island mode, active load fluctuation causes changes of the output frequency of the virtual synchronous generator; taking the difference value of the output frequency and the reference output frequency as the input of the virtual synchronous generator damping winding, taking the damping power which is obtained by multiplying the input with the damping coefficient as the output of the damping winding, wherein during the transient process, the damping power is not zero, so that output of the active power oscillation is restrained; and at the same time, comparing the damping power with the set steady-state damping power reference value 0, and compensating the deviation between the output frequency and the reference output reference through the PI regulator, wherein in the steady-state mode, output of the PI regulator is the difference value between the reference output frequency and the output frequency for the virtual synchronous generator, so that the influence of the damping power on the active power is eliminated.

The invention discloses an aircraft test system and a test method for simulating a flight environment. The system comprises a simulation cabin, a simulated aircraft, terminal equipment, a controller,a vibration sensor, a processor, a display, sand and dust simulation equipment, rainfall simulation equipment and strong wind simulation equipment. The simulated aircraft, the sand and dust simulationequipment, the rainfall simulation equipment and the strong wind simulation equipment are all arranged in the simulation cabin. When the simulated aircraft flies in a raining simulated environment, areal raining environment is provided for the simulated aircraft. In this way, a tester can conveniently judge the influence of the real environment on the simulated aircraft in the flight process. When the simulated aircraft flies in a strong wind simulation environment, the real strong wind weather is provided for the simulated aircraft. By simulating multiple real flight environments, the shaking condition test of the simulated aircraft in the flight process is comprehensively judged. As a result, the tested structure is more specific, more accurate and more representative.

The embodiment of the invention provides an air conditioner energy-saving control method and device, relates to the technical field of air conditioners, and aims to adjust an indoor environment to a comfort optimal state while lowering energy consumption and indoor environmental pollution. The method comprises the following steps: receiving a first selection instruction input by a user, wherein the first selection instruction indicates that a running mode of an air conditioning system is a cooling mode or an air blowing mode; if the first selection instruction indicates that the running mode of the air conditioning system is the cooling mode or the air blowing mode, judging whether the air blowing mode of the air conditioning system is a natural wind simulation mode or not; if the air blowing mode of the air conditioning system is the natural wind simulation mode, acquiring a thermal comfort index value of a human body; if the thermal comfort index value of the human body is not within a preset range, adjusting the temperature of the indoor environment and the fan speed of the air conditioning system till the thermal comfort index value of the human body is within the preset range. Embodiments of the invention are applied to a central air conditioner.

The invention provides an airplane rising, landing and taxiing performance comprehensive verification platform integrating airplane inertia simulation, lateral wind load simulation, taxiing speed simulation, runway state simulation and brake control and very high in universality, and by means of the airplane rising, landing and taxiing performance comprehensive verification platform, all-factor simulation and testing evaluation in the airplane rising, landing and taxiing processes can be achieved. The airplane rising, landing and taxiing performance comprehensive verification platform comprises an aircraft simulation system, an undercarriage airplane system, a braking system, a lateral wind simulation loading system, a runway simulation system, a measurement and control and simulation system and the like. By means of the airplane rising, landing and taxiing performance comprehensive verification platform, the taxiing speed, the course heading, the loading force and the braking torque can be measured, and visual simulation and braking control strategy researches can be conducted as well. The airplane rising, landing and taxiing performance comprehensive verification platform can provide an early-period theory, simulation and experiment basis for active-service or researched aircraft landing gear system design, taxiing control rate design and whole airplane inertia optimal allocation. The problem that at present, the control strategy can only be researched at the test flight taxiing stage is solved, and thus the cost and risks of out-field taxiing tests are greatly lowered.

The invention belongs to the technical field of ocean engineering, and relates to a floating offshore wind turbine generator hybrid model experimental device placed in a wind tunnel and a method. Theexperimental method comprises the following steps: (1) production of an experimental model, (2) connection of a monitoring unit and a motion control computer, (3) control command transmission, (4) constant wind simulation, (5) motion state feedback. The experimental device includes a manipulation system portion, an experimental model portion, and an air bellow. Compared with the prior art, the experimental model part of the device can be placed in a wind tunnel for testing, without relying on a wave tank, and can better reveal influence of hydrodynamics on aerodynamic performance of a fan.

The invention discloses a road tunnel ventilation performance model testing system. The road tunnel ventilation performance model testing system comprises a tunnel model, a traffic wind simulation system, a jet flow wind simulation system and a data test system. The traffic wind simulation system comprises a simulation dynamic model car and a car operation control system. The car operation control system comprises an annular guide rail model and a voltage controlled power source. The annular guide rail model is provided with two opposite straight line road sections and two opposite arc road sections, and road faces of the two arc road sections are inclined faces with lower inner sides and high outer sides. The voltage controlled power source comprises two groups, one group supplies power to the straight line road sections, in a tunnel, of the annular guide rail model, and the other group supplies power to the straight line road sections, paved outside the tunnel, of the annular guide rail model. The simulation dynamic model car operates on the annular guide rail model and gets power from the guide rail when passing through the two opposite straight line road sections. The road tunnel ventilation performance model testing system can form traffic wind which is stable and capable of guaranteeing that air flow can enter a self-model area, and has the advantages of being multifunctional and strong in development generality.

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.

The invention provides a natural wind simulation device and method. The natural wind simulation device comprises a motor and a control device. The control device is connected with the motor and used for outputting motor control signals to control the operation state of the motor, wherein the operation state includes operation speed and operation duration corresponding to all operation speed. The control device comprises a speed random module which is used for randomly generating speed numerical signals of rotating of the motor; and a time random module which is used for randomly generating operation duration numerical signals of all speed of the motor, wherein one duration numerical signal is corresponding to one speed numerical signal. The natural wind simulation device is enabled to generate natural wind in a simulation way, and the natural wind simulation device has the advantages of great simulation effect, high performance of closing to the nature and great experience so that users are enabled to experience flexible and changeable wind.

The invention discloses a wind field simulation device for a guide line galloping test. At present, researches on the guide line galloping test are very few, and a small amount of undertaken researches on the guide line galloping test are mainly carried out in a wind tunnel or on a test line; the galloping test carried out on the test line utilizes natural wind; the wind simulation device utilized by the galloping test in the wind channel is complex in structure and higher in cost. The wind field simulation device is characterized by comprising an expanding entrance, a rectification section, a contraction section, a test section, a zig-zag type contraction section and a power section which are spliced with each other in sequence from left to right; besides, the wind filed simulation device enables the airflow performance to be relatively stable, can meet the requirement of the guide line galloping test, and is simple in manufacturing technique and lower in cost.

The invention relates to a wind wave joint action offshore wind power generation set vibration performance test system which is characterized by comprising a wave water source supply control system, a wave vortex forming control system, a wave motion forming control system, a sea wind simulation control system, a test model system, a test space system and a test testing system. The wave water source supply control system, the wave motion forming control system and the sea wind simulation control system which are connected with an inner casing are arranged between the inner casing and an outer casing of the test space system. The wave vortex forming control system, the test model system and the test testing system are arranged in the inner casing. A motor control technology can be utilized to achieve rotating wave simulation. Electric hydraulic control is utilized to achieve all-dimensional wave motion to form force simulation and advancing direction controllability. An electric control technology is utilized to achieve sea wind speed and direction simulation. Water supply automatic control is achieved. The test system is reasonable in structure, reliable in performance and high in working efficiency.

The invention discloses an external environment testing device of a photovoltaic module capable of simulating wind, rain, snow and hail. In order to verify the product quality, an enterprise simulates various environment climates by using an environment testing device in the prior art. For a product exposed to an outdoor environment, simulation of the influences of wind, rain, snow and hail on the product is particularly important. According to the external environment testing device, a spray system, a snow simulation system, a hail simulation system and a wind simulation system are arranged on an experiment platform device. A thin-film pressure sensor covers on a photovoltaic module, the pressure of various systems is adjustable and nozzles of all simulation systems have mechanical degree of freedoms, so that the climate conditions under more complicated and changeable circumstances can be simulated. Data of the thin-film pressure sensor on the photovoltaic module are fed back to the control system in real time, so that output pressure of the systems is adjusted according to the experiment requirements. By adopting the design, experiment simulation can be further carried out close to life, accurate experiment data can be known and the testing process can be controlled.

The invention discloses a method for establishing transformer winding simulation model for sweep frequency impedance method. According to the method, through frequency band division, a low-frequency-band transformer winding centralized parameter equivalent model and a high-frequency-band transformer duplex winding trapezoid equivalent model are created respectively for the transformer winding simulation model for the sweep frequency impedance method. For this design, the method makes full use of the advantages of the low-frequency-band and the high-frequency-band equivalent models, and when the method is used to create a transformer winding equivalent model, it is possible to effectively simulate the frequency characteristics of the transformer winding within an entire frequency range under the sweep frequency impedance method so as to provide an accurate simulation method for the detection of the transformer winding deformation based on the sweep frequency impedance method. The method of the invention ensures the safety of the testing people and the equipment on one hand, and saves cost and time for the research on the transformer winding fault on the other hand. Therefore, the method is capable of providing basis for transformer winding equivalent circuit simulation testing used for the sweep frequency impedance method.

The invention relates to a natural wind simulation method for a wind erosion wind tunnel experiment. The method includes the following steps that: four groups of natural wind speed data are collected;any group of wind speed data is selected from a wind speed database, the maximum wind speed and minimum wind speed of the selected wind speed data are extracted, time t for wind speed to change to the maximum wind speed from the minimum wind speed is determined, and the ratio K of the cumulative time t to the total time of the data is solved; the average interval time of the presence of the maximum wind speed and minimum wind speed is set to be 0.5T, and time t' taken by each wind speed in a p 0.5T period is calculated according to 0.5KT, and each wind speed is corresponding to t' in the 0.5Tperiod from small to large, a curve about the change of the natural wind speed with time in the 0.5T period is formed, and a curve about the change of the natural wind speed with the time in a complete period T is formed; a curve about the change of the natural wind speed with the time in the complete period T under the other three groups of wind speed data is obtained; and air blow is adjusted according to wind speeds in the above curves, the wind speed control signal curve of a wind erosion wind tunnel, which is formed by the voltage signals of a speed governor and t', is measured, and airblow is adjusted according to the curve, so that natural wind can be simulated.

The invention provides a natural wind simulation method of an air conditioner. The natural wind simulation method comprises the following steps of acquiring the change curve of air volume of a fan along with the rotating speed; presetting the periodic change relationship of the air volume along with time; calculating the change curve of the rotating speed of the fan along with time; and adjustingthe rotating speed of the fan according to the time to realize the periodic change tendency of the air volume along with the time. By setting the periodic change relationship of the air volume of thefan along with the time and being combined with the change curve of the air volume along with the rotating speed, the change curve of the rotating speed along with the time is obtained, the periodic change of the air volume along with the time is realized, the unstable effect of natural wind can be simulated, a wind speed sensor is not required, the natural wind simulation method is not infected by the outside, and the natural wind simulation effect is better. The natural wind simulation method is simple in step, the required calculated amount is smaller, and the efficiency is higher.

The invention discloses a natural wind simulation device for meat air-drying. The natural wind simulation device comprises a grid box; and a driving bevel gear is fixedly arranged on a rotating shaftin a penetrating mode; a cam is fixedly arranged at the end, away from a driven bevel gear, of a connecting rod; inclined wind outlet covers are arranged at the end, away from a wind inlet pipe, of afirst hard wind pipe in a communicating mode, a gear is fixedly arranged on the outer wall of the first hard wind pipe in a penetrating mode, and the gear is meshed with a rack; corrugated pipes are arranged at the end, away from the wind inlet pipe, of a second hard wind pipe, horn-mouth-shaped wind outlet covers are arranged on the corrugated pipes in a communicating mode, and the outer sides ofthe multiple corrugated pipes are fixedly arranged in connecting pieces. According to the natural wind simulation device for the meat air drying, wind power in the environment can be directly utilized for air drying, after a power source is started, any one of the inclined wind outlet covers for rotary air sweeping and the horn-mouth-shaped air outlet covers for up-and-down air sweeping can be used, or the inclined wind outlet covers for rotary air sweeping and the horn-mouth-shaped wind outlet covers for up-and-down air sweeping can be used at the same time, the selection modes are more, andthe application range is wider.

The invention discloses a cable winding intensity tester, which comprises a tester body, wherein the front surface of the tester body is fixedly connected with a fixed base; the top of the fixed baseis fixedly connected with a driving device; one end of an output shaft of the driving device is fixedly connected with a driving gear; the surface of the driving gear meshes with a rotating gear; theaxis of the rotating gear is fixedly connected with a winding nozzle; the appearance of the winding nozzle is of a hollow tubular structure, and symmetric grooves are formed in one end of the windingnozzle; a tightening ring is arranged on the surface of one end of the winding nozzle in a sleeving manner. The invention relates to the technical field of analysis of cable intensity. The cable winding intensity tester realizes winding simulation for a cable through the winding nozzle, so that test data are more real and reliable; a recording device is connected with the cable to record the transmission efficiency of the wound cable in real time; once the cable has a circuit transmission interruption, the number of turns of rotation of a driving device can be recorded to fulfill an aim of testing the cable winding intensity.

The invention discloses a lightning test device for simulating a dynamic aircraft, which comprises wind tunnel test equipment, an aircraft scaling model, a support column, a support table, a high-voltage electrode, a lightning generator, a high-speed camera and a support frame, and is characterized in that the aircraft scaling model is mounted on the support column, and the support column is fixed on the support table and placed at an air outlet of the wind tunnel test equipment; and the wind tunnel test equipment blows air to the aircraft scaling model to simulate dynamic flight of the aircraft, meanwhile, various types of lightning currents generated by the lightning generator discharge to the aircraft scaling model through the high-voltage electrode connected with the lightning generator to simulate lightning stroke, and the high-speed camera records the dynamic lightning stroke attachment process. According to the invention, the lightning stroke test of the aircraft in the simulated dynamic flight mode can be realized, the design is reasonable, the simulated dynamic test requirements of the lightning subarea test of the aircraft with the ultra-high sound speed are met, the error of the static test is avoided, and the measured data is closer to the real situation.

The invention provides a scene wind simulation method, device and system and a storage medium. The method comprises the steps that a controller obtains a target scene selection instruction; the targetscene selection instruction is used for determining a target scene from a scene set; the scene set comprises at least one scene; the target scene comprises a target scene audio and a target scene parameter; the controller generates a control instruction according to the target scene parameter; the control instruction is used for controlling the working mode of equipment in a cabin to match the target scene; and the controller sends the control instruction the equipment in the cabin, wherein the in-cabin equipment comprises a player and an air conditioner. According to the method, the intelligence of the equipment in the cabin is improved, and the user somatosensory and user experience are improved.

The invention provides a takeoff and landing training platform for a rotor unmanned plane, including a training unmanned plane, a training platform, a console and a pair of VR glasses. The training unmanned plane is in the training platform, the console is outside the training platform, the console is equipped with the pair of VR glasses, the training platform is a cube, and the training platform comprises a platform shell, an inner partition, a hollow column, a camera, an illumination lamp, a landing board and a flexible board. The takeoff and landing training platform for the unmanned plane is mainly used for takeoff and landing training of the unmanned plane, through matching the VR glasses, the real external environment simulation is achieved, the multi-angle wind simulation is achieved in the platform through the air port, and the unmanned plane in the platform performs real takeoff and landing, so that the sense of reality of the training is high. The flexible pad wind power equipment is equipped, so that the platform can be directly shut down and the unmanned plane cannot be damaged easily.

The invention discloses a wind tunnel test research device and method for swinging of a cable crane cage under influence of gale. The device comprises a wind simulating device for simulating a gale environment, wherein the wind simulating device is arranged on the side face of a swinging device, the swinging device is used for simulating the cable crane cage and being matched with the wind simulating device to simulate the swinging conditions of the cable crane cage in different wind speed grades; and the swinging device is matched with a test recording instrument for recording the simulatingtest result, and the test recording apparatus records a test result. The device can simulate the swinging condition of the cable crane cage in the gale condition, so as to provide data support for follow-up researches.

The invention provides a ventilation system filtering performance testing device and method for a railway vehicle. The ventilation system filtering performance testing device for the railway vehicle comprises a spraying assembly and a testing assembly, wherein the spraying assembly is used for spraying an object to be filtered; the to-be-tested piece is arranged in the test air duct assembly, and the spraying assembly is communicated with the test air duct assembly; the first filter is arranged in the test air duct assembly; the cooling air simulation assembly is communicated with the test air duct assembly, and cooling air generated by the cooling air simulation assembly penetrates through the filtering surface of the to-be-tested piece; the wind resistance measuring assembly is used for measuring the wind volume and the resistance of the to-be-tested piece; the weighing assembly is used for weighing the weight of the to-be-filtered object and the weight of the to-be-tested piece before and after filtering. The problem that the filtering performance of the ventilation system of the railway vehicle cannot be accurately measured in the prior art is solved.

The invention relates to a generator rotor RSO test simulator, a simulation system and a use method. The generator rotor RSO test simulator comprises a positive wiring terminal, a negative wiring terminal, a ground terminal, N sets of winding simulation circuits and a fault simulation circuit, wherein the N is an integer greater than 1, the N sets of winding simulation circuits are connected in series, one end of the winding simulation circuits connected in series is connected with the positive wiring terminal, the other is connected with the negative wiring terminal, each winding simulation circuit is connected with the ground terminal, the fault simulation circuit is connected with the winding simulation circuits, and various faults of the generator rotor RSO test simulator are made by controlling the on and off of the fault simulation circuit. The generator rotor RSO test simulator is advantaged in that the different faults of an electronic rotor can be simulated without the need for a true electronic rotor, development of training skill competitions is convenient, and a lot of funds is saved.