125 results about "Crosswind" patented technology

The invention relates to a vehicle control method and device, computer equipment and a storage medium. The method comprises the steps of obtaining target crosswind information of crosswind acting on a vehicle according to driving information of the vehicle, weather information of a scene where the vehicle is located and scene image information; determining a target yaw velocity of the vehicle according to the vehicle state information of the vehicle; determining a first angular velocity difference value between the target yaw velocity and an actual yaw velocity obtained through a sensor of the vehicle, and determining driving condition information of the vehicle according to the first angular velocity difference value; and target control information of the vehicle is obtained by using the first angular velocity difference value and / or the target crosswind information according to the driving working condition information of the vehicle. By adopting the method, the driving stability of the vehicle in the crosswind environment can be improved.

The invention relates to the technical field of vehicle aided driving, and provides a crosswind early warning method for vehicle aided driving, and the method comprises the steps: carrying out the multi-dimensional data collection and feature extraction, carrying out the correlation analysis of crosswind interference, outputting a quantitative parameter representing the influence of crosswind interference, inputting the quantitative parameter into a risk analysis model, and carrying out the fusion calculation, thereby achieving the early warning of crosswind interference. The early warning level is determined according to a calculation result, a dynamic prediction model is constructed by integrating multi-dimensional data such as driver data, real-time wind direction data, driving data, altitude information and climate information, a risk early warning coefficient is calculated in real time, prediction precision and real-time performance are guaranteed, warning response time is prolonged through a pre-prediction means, and the early warning efficiency is improved. And the high-speed driving safety is effectively improved.

The present invention relates to equipment that can realistically reproduce various types of airflow occurring in environments such as an urban area with tall buildings or regions with mountains and valleys, thereby enabling verification of the flight safety of a multicopter-type drone. The present invention comprises: a housing that provides a tunnel-shaped test space in which a plurality of blowers, together with controllers, are installed along the longitudinal direction of both sidewalls of the interior, the ceiling, and the floor, to generate airflows such as crosswinds, updrafts, downdrafts, and vortices; and an integrated control unit that selectively or simultaneously controls some or all of the plurality of controllers installed in the housing so as to form airflows in pattern corresponding to user input or settings.

The invention relates to the technical field of wind power generation. The invention provides an emergency yaw and automatic crosswind method and system for a wind turbine generator. The method comprises the following steps: monitoring the on-off state of a safety chain in real time, and activating an emergency power supply switching module when detecting that the safety chain is disconnected; synchronously acquiring unit vibration spectrum, impeller rotating speed, environment wind speed and cabin load distribution data, and generating dynamic risk assessment parameters based on a multi-source signal fusion algorithm; inputting a hierarchical control instruction to a yaw driver according to a comparison result of the risk assessment parameter and a preset threshold value; and in the automatic crosswind control stage, the yaw rate and the angle offset are dynamically adjusted based on the blade root bending moment real-time feedback and the wind speed change rate, so that the unit maintains the aerodynamic load balance in the non-windward state. The problems that after a safety chain of an existing wind turbine generator is disconnected, yaw capacity is completely lost, emergency crosswind protection or fault recovery cannot be achieved, and a traditional emergency yaw scheme is high in cost, complex in maintenance, slow in response, difficult to adapt to complex working conditions and the like are solved.

The invention relates to the field of vehicle control, in particular to a vehicle control method, device and equipment and a medium. When the vehicle speed is larger than the preset vehicle speed, whether the vehicle enters the crosswind area or not is actively recognized, the early warning wind power level is obtained, and the crosswind risk can be sensed in advance. Whether the crosswind pre-control function is activated or not is determined according to whether the vehicle enters the crosswind area or not and the early-warning wind power level, and the phenomenon that in the prior art, measures are taken after the vehicle deviates due to crosswind is avoided. After the pre-control function is activated, working parameters of a vehicle chassis control part are adjusted in time, for example, steering hand force becomes heavy, the height of an air spring is reduced, the rigidity is increased and the like, corresponding preparation is actively made before crosswind influences the vehicle, the stability of the vehicle is enhanced, the situation that the vehicle seriously rolls and deviates from a driving route due to the crosswind is effectively avoided, and the service life of the vehicle is prolonged. And the driving safety is improved.

A flying vehicle with folding wings that drives well on the ground and flies well in the air; controlled from inside, it changes from automotive to aircraft configuration without the operator needing to get out of the vehicle. The balance point of the vehicle is located midway between the front and back wheels, providing good handling on the road. In the aircraft configuration with wings unfolded, there is a front wing and a back wing. The incidence of the front wing is controllable, enabling the craft to rotate and take off with a center of gravity located well ahead of the rear wheels. The back wing is fitted with foldable vertical stabilizers near its wing tips. In automobile configuration the wings are folded on top of the body; the wings resemble a roof rack with large surfboards on it. Driven wheels provide motive power on the ground; ducted fans provide thrust for air travel. An autopilot system provides stability and navigation aid, particularly in bad weather or poor visibility. In the roadable configuration, filling water ballast tanks provides additional crosswind stability and crash protection. Also in a roadable configuration, the present invention may be licensed as a three-wheeled motorcycle towing a two-wheeled trailer. In its flying configuration, the invention can be licensed as a Light Sport Aircraft.

The invention relates to the field of unmanned aerial vehicle automatic landing control, and discloses an unmanned aerial vehicle wind-resistant landing control system which comprises an external wind-resistant structure module arranged on the periphery of an unmanned aerial vehicle landing area, and the external wind-resistant structure module adopts a fixed conical cover body design; the external windproof structure module guides external airflow into the landing area, and the size and the height of the top opening of the conical cover body are shown in the specification. A local low-wind-speed environment is constructed through the external windproof structure module, the wind speed of a landing area is effectively reduced, and the wind speed of the landing area is effectively reduced in combination with real-time estimation and accurate control of the environment perception and decision control module on the external wind speed and the tail-section attitude correction capability of the attitude correction and re-landing strategy module. The landing point alignment accuracy of the unmanned aerial vehicle under the condition of crosswind, gust or sudden wind direction change is remarkably improved, and horizontal drifting and landing failure caused by wind disturbance are effectively avoided.

The invention provides a water spraying control optimization method and system for a new energy environmental sanitation washing and sweeping vehicle, and relates to the technical field of new energy vehicle control, the method comprises the steps: collecting the airflow velocity and direction data of a plurality of monitoring points around the vehicle, and generating an airflow field distribution diagram dynamically representing the airflow around the vehicle body in a grid form through spatial interpolation; inputting the current pressure of the water spraying system, the current action state of the flow guide air curtain system and the graph into a collaborative prediction controller, and optimally outputting a water spraying pressure adjusting instruction and a flow guide air curtain action instruction in a future interval; and finally, an embedded signal coupler calculates a driving signal to adjust the rotating speed of a water pump and the deflection angle of a grating nozzle, so that an airflow barrier adapts to crosswind and wraps a water curtain, collaborative optimization control of a water spraying system and a flow guide air curtain system of the new energy environmental sanitation cleaning and sweeping vehicle can be realized, crosswind changes are dynamically adapted, and the flow guide effect is improved. And effective dynamic wrapping of the sprayed water curtain is ensured.

The invention relates to the technical field of aviation safety, in particular to a short-distance parallel runway collision risk assessment method based on influence of front and side wind, which comprises collision risk assessment, Bayesian parameter estimation, linear regression analysis, dynamic front and side wind fitting and Monte Carlo analog simulation. The problem of small sample parameter estimation is solved by introducing a Bayesian parameter estimation method, crosswind parameters are calculated by combining linear regression analysis, positive crosswind data are fitted by applying Weibull distribution, and an influence rule of positive crosswind and an initial interval on collision probability is quantified through Monte Carlo simulation. According to the short-distance parallel runway collision risk assessment method based on the influence of the positive and crosswind, on the basis of a traditional collision model, a re-flight condition is incorporated into the model, complex scenes such as crosswind and re-flight are considered, a dynamic interval adjustment model is fused, and a new collision risk model is established; the crosswind grading minimum interval standard is provided for airline companies and air traffic control operation management, and the runway safety and the airport operation capacity are improved.

The utility model discloses an anti-wind disturbance unmanned aerial vehicle rotor wing protective cover structure, which comprises an annular cover and a lead, a plurality of groups of diversion trenches are symmetrically arranged around the surface position of the annular cover, and diversion grids are obliquely arranged in the diversion trenches. According to the utility model, the flow guide grooves and the flow guide grids are adopted, the flow guide grooves are symmetrically formed in the two sides of the surface of the annular cover, the flow guide grids are mounted in the flow guide grooves, the inclination angles of the flow guide grids are different according to different positions, and when the flow guide grooves are located above the rotor wings, the flow guide grids incline upwards, so that the flow guide grids are inclined upwards; when the flow guide grooves are located below the rotor wings, the flow guide grids incline downwards, in this way, when crosswind impact occurs, crosswind can be guided to the upper portion and the lower portion of the rotor wings through flow guide of the flow guide grids at different positions, and then it is avoided that the crosswind directly acts on the rotor wings, air flow is uneven, and flight safety is affected; the device has the advantage of crosswind diversion.

This invention discloses a method, system, and vehicle for adjusting body roll in crosswinds during oncoming traffic. The method acquires full-dimensional parameters and inputs them into a crosswind impact timing prediction model to predict the impact timing in advance. Based on this, it divides the adjustment into three stages: pre-tensioning, precise attitude control, and recovery, overcoming the inherent lag of existing passive feedback control's post-event intervention and achieving a leap from post-event compensation to pre-event control. The pre-tensioning stage uses a non-full pre-tensioning target value, and the recovery stage smoothly restores the vehicle according to the calibrated slope. This avoids the comfort degradation caused by existing on / off pre-adjustment technologies that apply full pre-tension throughout the entire process without a smooth recovery, effectively suppressing crosswind impact while significantly improving the driving experience. Differential adjustment of the damping / stiffness of the left and right suspensions is performed based on the bidirectional impact characteristics, overcoming the shortcomings of existing technologies that apply a one-size-fits-all approach and cannot differentiate adjustments based on the impact direction, resulting in a significant improvement in attitude control accuracy.

This invention relates to a method, device, and medium for intelligent assisted driving instability early warning of vehicles in windy and rainy conditions. The method involves collecting rainfall intensity, crosswind speed, and vehicle driving state parameters; querying a CFD wind-rain coupled aerodynamic load database to obtain corresponding aerodynamic six-component force data; inputting the aerodynamic six-component force data as external disturbances into the vehicle's multibody dynamics model, simulating and outputting vehicle state response parameters; calculating environmental impact parameters based on rainfall intensity and crosswind speed, and dynamically correcting the preset normal thresholds of various instability indicators based on these environmental impact parameters to obtain dynamic instability thresholds under windy and rainy conditions; assigning weights to various instability indicators according to the vehicle's current driving conditions, and calculating a comprehensive instability index based on the vehicle state response parameters and dynamic instability thresholds; determining the instability level based on the comprehensive instability index and calculating the remaining stabilization time. Compared with existing technologies, this invention has advantages such as high accuracy, strong adaptability, and good real-time performance.

The invention discloses an air-cooled heat exchange system adaptable to crosswind and a control method thereof.The system comprises an air-cooled heat exchanger, a differential pressure sensor, a fan and two temperature sensors, the fan is arranged on the outer side or the inner side of the air-cooled heat exchanger, and the fan can form a forward working mode or a reverse working mode; the pressure difference sensor detects the air pressure difference between the external environment air pressure outside the outer side of the air-cooled heat exchanger and the air pressure inside the air-cooled heat exchanger, the two temperature sensors detect the temperature of the inlet end and the outlet end of the air-cooled heat exchanger respectively, or one temperature sensor detects the temperature of the outlet end of the air-cooled heat exchanger, and the other temperature sensor detects the temperature inside the air-cooled heat exchanger. The differential pressure sensor, the air-cooled heat exchanger outlet end temperature sensor, the air-cooled heat exchanger inlet end temperature sensor and the fan are electrically connected with the control system. In the control method, the control system controls the fan to work according to the air pressure difference and the temperature difference of the two sensors. According to the invention, the system can run stably when encountering crosswind.

The invention discloses a composite peak cooling wind-resistant air cooling system which comprises a supporting structure, and a draught fan unit, a dry type air cooling precooler heat exchanger, a humidifying perforated plate and a high dynamic pressure chamber are installed on the supporting structure. The fan unit is arranged at the bottom of the dry type air cooling precooler heat exchanger; the humidifying perforated plate is arranged on the peripheral side of the fan unit in a surrounding manner and is used for decelerating, humidifying and cooling passing air; the high dynamic pressure chamber is arranged on the top of the dry type air cooling precooler heat exchanger and used for increasing energy of air passing through the dry type air cooling precooler heat exchanger so that the air can be rapidly exhausted upwards. Air is pretreated through the humidifying perforated plate, the temperature is reduced, the speed is reduced, and the influence of environmental crosswind on the fan is reduced; meanwhile, due to the design of the high dynamic pressure chamber, the exhaust dynamic pressure is effectively improved, hot air backflow is prevented, the cooling effect of supercritical carbon dioxide is stably maintained in the high-temperature and crosswind environment, and the operation efficiency of a power generation system is improved.

The present invention discloses a system and method for improving a vehicle's crosswind resistance through an active stabilizer bar. The adaptive cruise control system is used to measure the longitudinal distance, lateral distance, relative speed, and real-time speed of the vehicle and the oncoming vehicle, and calculate the time of meeting based on the relative speed and longitudinal distance between the vehicle and the oncoming vehicle; calculate the time period of meeting based on the real-time speed of the vehicle and the relative speed between the vehicle and the oncoming vehicle; calculate the torsional torque value required for the stabilizer bar during the meeting based on the relative speed, lateral distance, and maximum speed of the vehicle and the oncoming vehicle; and control the torsional torque of the stabilizer bar during the meeting process based on the meeting time, meeting time, and required torsional torque value. The present invention can automatically measure the meeting time and relative speed, adjust the relative position of the active stabilizer bar in advance, and increase the torsional stiffness preload to reduce the interference of crosswind on vehicle body roll during the meeting.

The invention discloses a ventilation window control method used in a gust environment. According to the method, crosswind, downwind, headwind and conventional states are judged by collecting the pressure of the left air inlet side, the pressure of the right air inlet side and the pressure of the tail end in real time, and side opening adjustment, unit number adjustment and rotating speed control are executed according to the different states. And in the crosswind state, the opening degree range is limited, side adjustment is carried out in the mode that the opening degree range is not smaller than the minimum stepping, and the left-right air volume ratio approaches the target coefficient. In a downwind or upwind state, the number of running machines is adjusted preferentially, and then the rotating speed is adjusted step by step, so that the tail end pressure returns to a tolerance range of a reference value. After an exit condition is met, freezing maintenance is carried out, and conventional ventilation is returned; and when the sensor is abnormal or the environment exceeds the limit, a degradation mode and bottom ventilation are entered, so that the stability and reliability of the system in a complex gust scene are improved.

The present invention provides a steering control device that can perform appropriate control in both cases where wind force increases and cases where it does not. [Solution] Based on image data Dp, position data Dpgs, and map data, it is predicted whether or not the crosswind for the coupled vehicles will increase within a predetermined time (S54). If it is predicted that the crosswind will strengthen, a process is performed to further slow down the yaw response compared to when it is not predicted (S60, S62).

The invention discloses an automobile crosswind prevention system which comprises an automobile body (1), a wind sensing device (2) and an aerodynamic suite (3) are arranged on the top of the automobile body (1), a hydraulic lifting device is arranged in the roof of the automobile body (1), and the hydraulic lifting device is connected with the wind sensing device (2) and the aerodynamic suite (3). When the vehicle encounters crosswind, the transverse aerodynamic suite can be automatically lifted to reduce the influence of the crosswind on the vehicle, the stability of the vehicle is improved, the transverse aerodynamic suite is automatically folded when the crosswind disappears, and the dynamic property and economical efficiency of the vehicle are guaranteed.

The intelligent windshield capable of being automatically adjusted according to the expressway crosswind strength comprises a baffle and supports fixed to the two sides of the baffle, supports are arranged at the tail ends of the lower sides of the two supports correspondingly, fixing rings are fixed to the front portions of the upper sides of the supports, and glass is fixed to the middle of the lower side of the baffle. And fixing bases are fixed to the middles of the upper end and the lower end of the position, where the glass is located, of the rear side of the baffle correspondingly, a sleeve is fixed to the middle of the upper side of the fixing base on the lower side, and a rotating shaft is movably connected to the middle of the lower side of the fixing base on the upper side. Wind energy is directly converted into mechanical energy for driving the adjusting plate to move transversely and is converted into rotating potential energy of the rotating shaft through gear and rack transmission, the problem that an existing intelligent windshield depends on power supply, a sensor and an electronic control system is solved, and the device can still work stably in outdoor severe environments such as highways and the like. And the maintenance cost and the failure rate are greatly reduced.

The invention provides a ground vortex intensity prediction method under a crosswind condition, and the method comprises the following steps: S1, judging whether a ground vortex is generated or not according to a ground vortex intensity prediction model under the crosswind condition, and calculating a dimensionless circulation under a corresponding working condition; s2, according to an air inlet distortion index prediction model, calculating the size of an air inlet total pressure distortion index caused by suction of a ground vortex; and S3, according to a CFD calculation result, determining the model output parameter precision and aerodynamic characteristics reflected by the model output parameter precision so as to verify the reliability of the model. The invention provides a reliable ground vortex intensity prediction model for 90-degree crosswind conditions. The ground vortex intensity prediction model not only can qualitatively judge whether a ground vortex is generated, but also can quantitatively calculate ground vortex intensity and air inlet total pressure distortion.

The invention provides a vehicle torque control method and device for coping with crosswind, a medium and equipment, and the method comprises the steps: collecting operation state parameters of a target vehicle in the operation process, and calculating crosswind lateral torque; calculating the maximum steering yaw moment generated by steering within the safe range; if the maximum steering yawing moment is smaller than the crosswind lateral moment, the target vehicle is controlled to steer to generate the maximum steering yawing moment, and the braking force distribution proportion of all wheels of the target vehicle is adjusted to generate a braking yawing moment in the opposite direction of the crosswind lateral moment; whether the influence of crosswind can be eliminated by only depending on steering operation is judged by calculating the maximum yawing moment generated by steering within a safe range, and if not, the braking force distribution proportion of wheels of a target vehicle is synchronously adjusted to supplement the braking yawing moment, namely, the crosswind is comprehensively resisted by combining a steering and braking distribution proportion adjustment mode. The interference of crosswind on the operation of a target vehicle is reduced, so that the stability and the safety of vehicle operation are improved.

The application is suitable for the technical field of vehicle aerodynamic control, and provides a commercial vehicle tailgate partition independent deflection control device and method facing side wind conditions.The device comprises a three-part tailgate assembly, an independently arranged execution unit, a wind speed and direction sensor, a vehicle state sensing module and an electronic control unit.In the offline stage, an aerodynamic response offline mapping model is constructed through CFD simulation and Gaussian process regression, and an offline prediction table is generated.In the online stage, according to the real-time vehicle speed and side wind yaw angle, the optimal tailgate angle instruction for reducing resistance is output under the condition of meeting the lateral force safety threshold, and each tailgate is independently driven to execute.The application can actively adjust the posture of each tailgate according to the side wind, continuously reduce the aerodynamic resistance while ensuring the stability of the side wind, and has the advantages of fast decision-making, strong robustness and obvious oil-saving effect.

The invention provides a vehicle auxiliary driving control method for preventing an accident under crosswind, and relates to the technical field of auxiliary driving control, and the method comprises the steps: collecting external environment parameters and vehicle driving speed in a vehicle driving process, including collecting physical parameters and technical specifications of small and medium-sized vehicles, vehicle operation parameters, and environment parameters around a vehicle body during operation; acquiring a vehicle return angle according to the vehicle external parameters and the internal physical parameters; a machine learning model is established, the machine learning model comprises a model that the vehicle should return to the right angle under the influence of the external environment and a model that the vehicle external environment changes in the future, and the decision event detection comprises the detection of the current driving state of the vehicle and the future danger level of the driving state and the detection of the corrected deflection angle of the vehicle; decision implementation includes danger prompting, safe snub braking, speed maintaining and deflection angle correcting.

The application relates to the technical field of unmanned planes, and discloses a rescue unmanned plane based on a compound-wing vertical take-off and landing platform and a control method thereof. The method monitors the tension of a sling through a high-precision tension sensor, estimates and compensates for system disturbance caused by cable swing and crosswind by adopting a compound control strategy combining an extended state observer and a recursive sliding mode controller, dynamically adjusts the thrust distribution of a rotor and the included angle of a rotating plane, effectively suppresses the "nodding phenomenon" and cargo swing when the load suddenly increases, and significantly improves the flight stability and safety of the unmanned plane during the hoisting and rescue of materials.

The invention belongs to the technical field of unmanned aerial vehicle testing, and particularly relates to unmanned aerial vehicle wind resistance simulation equipment. Comprising a testing mechanism; the testing mechanism comprises a top frame and a bottom frame; the top frame and the bottom frame are fixed through two stand columns. First mounting frames are uniformly arranged between the two stand columns on the same side; first fans which are uniformly arranged are mounted in the first mounting frame; an arc plate is mounted on the left side of the stand column on the left side; second mounting frames are uniformly arranged between the two arc plates; second fans which are uniformly arranged are mounted in the second mounting frame; a platform is arranged in the middle of the bottom frame, and an unmanned aerial vehicle needing to be tested is placed on the platform; an electric push rod is mounted at the bottom of the platform, and the other side of the electric push rod is mounted at the top of the rail intelligent trolley; by arranging the testing mechanism, all-working-condition scenes such as route cruise, maneuvering flight, crosswind, headwind and downwind all-directional flight and the like in the real operation process of the unmanned aerial vehicle can be completely covered.

This invention relates to the field of unmanned aerial vehicle (UAV) technology and discloses a highly wind-resistant multi-rotor UAV. The UAV includes a main body with a wind speed and direction sensor fixedly mounted at its lower end. Six sets of rotor arms are fixedly mounted around the main body. A drive assembly is mounted on one side of each rotor arm, and a control assembly is mounted on the upper side of each drive assembly. Propeller blades are fixedly mounted on the upper side of each drive assembly. Each drive assembly includes a rotor sleeve fixedly fitted onto one side of a rotor arm, and two sets of motor mounts are fixedly disposed at one end of the rotor sleeve. This highly wind-resistant multi-rotor UAV, through coordinated use, can generate a horizontal component of lift by changing the angle of the propeller blades. When encountering crosswinds, the propeller blades are tilted towards the crosswind direction, and the resulting horizontal component of lift counteracts the thrust of the crosswind.

A computer-implemented method when executed by data processing hardware causes the data processing hardware to perform operations. The operations include defining, via a plurality of ultrasonic sensors, a plurality of detection zones, capturing, via the plurality of ultrasonic sensors, wind data from one or more of the plurality of detection zones, and determining, via a wind monitoring application, a wind direction and a wind magnitude based on the wind data. The operations also include receiving, at the wind monitoring application, weather data, executing, via the wind monitoring application, a fusion function on the wind data, the weather data, and vehicle dynamics to define fused wind data, executing, based on the fused wind data, a crosswind assist function of the wind monitoring application, and executing, via the wind monitoring application, lateral controls of the crosswind assist function.

The utility model discloses a wind-proof mechanism of a remote sensing surveying and mapping unmanned aerial vehicle, relates to the technical field of unmanned aerial vehicles, and aims to solve the technical problem that the flight control accuracy of the unmanned aerial vehicle is influenced due to the increase of resistance caused by the increase of the current wind-proof mechanism. The chassis and the wind shield are matched to shield the blades of the unmanned aerial vehicle, so that the influence of the high-altitude crosswind on the blades is reduced, the flying stability is improved, the chassis and the wind shield are combined through the sliding grooves and the balls, the effect that the wind shield can rotate can be achieved, and the blades of the unmanned aerial vehicle can be shielded through the matching of the chassis and the wind shield, so that the influence of the high-altitude crosswind on the blades is reduced. The chassis and the wind shield are combined through the sliding grooves and the balls, so that the effect that the wind shield can rotate can be achieved, and the unmanned aerial vehicle has the advantages that wind resistance is reduced, and the flight control accuracy of the unmanned aerial vehicle is improved.

The invention provides a traffic tool crosswind interference airflow compensation device, and relates to the technical field of crosswind compensation, the traffic tool crosswind interference airflow compensation device comprises a mounting plate, a compensation mechanism and a fixing mechanism, the compensation mechanism comprises a movable plate, a first spring and a counterweight ball, and the inner bottom wall of the movable plate is fixedly connected with the top end of the first spring; the movable plate, the first spring and the balance weight ball are used for compensating automobile crosswind interference in time, the movable seat continuously moves, the transverse plate can push the upper surface of the movable plate, the movable plate obliquely swings, the balance weight ball shell falls into the movable seat from a groove of the movable plate to pull the first spring, and the balance weight ball shell can move in the groove of the movable plate. The balance weight ball can roll in the moving seat through friction between the balance weight ball and the surface of the moving seat, the weight of the moving seat can be increased to compensate crosswind interference of an automobile, meanwhile, the embedding pipe can be driven to be embedded into the bottom end of the bolt through movement of the cover plate, the bolt can be limited and extruded through the embedding pipe, and the bolt is prevented from loosening.

This invention discloses a thin-walled, narrow-edge ducted fan that reduces crosswind interference. The fan comprises a duct shell, a multi-faceted frame, a trailing edge fairing, and a leading edge fairing. A drive motor is housed within the trailing edge fairing, and the bottom of the fairing is connected to the drive motor's base via screws. A motor rod extends from the drive motor, passing through the multi-faceted frame. The duct shell and leading edge fairing are fixedly connected by screws, and the motor rod is rotatably connected to the hub frame of the multi-faceted frame via bearings. The duct shell features a thin-walled, narrow-edge design, with the ratio of the duct shell's side length L to its inner diameter d being L / d ≤ 1 / 6. The interior of the duct shell is filled with foam, and the maximum wall thickness h of the outer wall satisfies either h = 1.5 mm, L ≤ 20 mm or 1.5 mm ≤ h ≤ 0.075L, L ≥ 20 mm. This design significantly reduces the weight of the shell compared to ordinary ducted fans, and when mounted on drones, it can reduce drag during high-speed level flight and mitigate crosswind effects during hovering and vertical takeoff and landing.