200 results about "Wind gust" patented technology

Pressure equalization between upper and lower surfaces of PV modules of an array of PV modules can be enhanced in several ways. Air gaps opening into the air volume, defined between the PV modules and the support surface, should be provided between adjacent PV modules and along the periphery of the array. The ratio of this air volume to the total area of the air gaps should be minimized. Peripheral wind deflectors should be used to minimize aerodynamic drag forces on the PV modules. The time to equalize pressure between the upper and lower surfaces of the PV modules should be maintained below, for example, 10-20 milliseconds. The displacement created by wind gusts should be limited to, for example, 2-5 millimeters or less. For inclined PV modules, rear air deflectors are advised for each PV module and side air deflectors are advised for the periphery of the array.

A method of reducing the bending moment effect of wind gust loads acting on the wing of an aircraft involves adjusting the aerodynamic configuration of the wing so as to alter the distribution of lift generated by the wing during phases of flight in which critical wind gusts are expected to occur. Particularly, during climb and descent phases of flight below cruise altitude, the lift generated by outboard portions of the wings is reduced while the lift generated by inboard portions of the wings is increased. Thereby, the 1 g basis load acting on the outboard portions of the wings is reduced, and consequently the total load applied to the outboard portions of the wings, resulting from the 1 g basis load plus the additional wind gust load, is correspondingly reduced. This leads to a reduction of the bending moments effective on the wings, and of any rolling moment effective on the aircraft. The required adjustment of the lift distribution is preferably achieved by deflecting the ailerons of both wings symmetrically upward and/or deflecting the flaps of both wings symmetrically downward during climb and descent. The adjustment of the wing configuration is carried out dependent only on flight parameters such as the altitude, speed and gross weight, and does not require rapid sensing of the occurrence of a wind gust and rapid actuation of control surfaces to try to instantaneously counteract a wind gust as it occurs.

The present invention models dynamic behavior of flight vehicles for simulation, analysis, and design. The present invention allows a user to define the complexity of a flight vehicle model, and such models may be simple rigid body models, models of medium complexity, or very complex models including high order dynamics comprising hundreds of structural flexibility modes and variables related to aero-elasticity, fuel sloshing, various types of effectors, tail-wags-dog dynamics, complex actuator models, load-torque feedback, wind gusts, and other parameters impacting flight vehicles. The present invention accommodates and analyzes multiple vehicle and actuator concepts and configurations as defined in flight vehicle input data, which specifies flight vehicle parameters at a steady-state condition for modeling flight vehicle response to dynamic forces and flight control commands with respect to steady state operation.

A system and method provide a proactive mechanism to control pitching of the blades of a wind turbine to compensate for rotor imbalance during normal operation by pitching the blades individually or asymmetrically, based on turbulent wind gust measurements in front of the rotor, determined before it reaches the rotor blades.

Loads reduction method in a wind turbine for power-grid disconnection during a wind gust, which uses a control system made up of three loops used to correct the speed at which the wind turbine blades are moved to the feathered position throughout a controlled emergency stop, with a non-linear law that takes into account blade position, tower vibrations and generator rotation speed limits.

Solar panels row cleaning system that can dock and lock itself at a docking extension attached to the solar row. The self-docking and self-locking is optimally used when the cleaning system is not working. Movement of a cleaning apparatus of the cleaning system is controlled to cause an anchoring element on the cleaning apparatus to engage with an anchoring element on the docking extension when in the docking position and thereby lock the cleaning apparatus preventing its movement in horizontal and downward directions. This is particularly useful when strong wind gusts are present.

A method for reconstructing gusts and/or structural loads at aircraft, in particular passenger aircraft. The method includes generating an observer on the basis of a nonlinear model of the aircraft which describes the movement of the aircraft in all six degrees of freedom (DoF) and the elastic motion of the aircraft structure; continuously supplying all the data and measurements substantial for the description of the state of the aircraft to the observer; and calculating the gust velocities and structural loads (manoeuvre and gust loads) by the observer from the supplied data and measurements.

Systems and methods for determining a power disruption index indicative that provides subscribers with a forecast of weather conditions that are likely to cause interruptions to power distributions systems within their specific areas of service. The Power Disruption Index (PDI), is a calculation of a number of forecast weather parameters including severe thunderstorm probabilities and intensities, wind speeds, wind gusts, and snowfall and ice accretion. The index combines each of these input parameters with a specific weighting based on the forecast intensity of each of the parameters, along with alert threshold criteria provided by each client utility. The output PDI is a forecast of local weather conditions for a specific local service area or power distribution network.

Operation method for a variable speed wind turbine which comprises control methods for blade pitch in cases of extreme gusts of wind, characterised by the fact that it is comprised of the following steps: a) detection of the presence of an extreme gust of wind; b) performance of a sudden increase in pitch within the range of 6 to 14 degrees at the maximum speed permitted by the wind turbine blade pitch control mechanisms. The method also includes an additional step; c) vary the generator speed to avoid an increased acceleration of the generator which could make a subsequent step b) necessary.

The invention belongs to flight control technology, and relates to improvement on a large aircraft lateral gust mitigating method, which is characterized by comprising the steps of calculating a sideslip angle Delta Beta generated by front gusts, calculating a rudder compensation instruction Rudc_f1, calculating a rudder correction instruction Rudc_f2, calculating a gust advanced restrain rudder instruction Rudc_f, calculating a gust advanced restrain aileron instruction Ailc_f, calculating a differential pressure sideslip angle Beta f, calculating a corrected sideslip angle Beta fc, calculating a high-frequency sideslip angle, calculating a low-frequency sideslip angle, calculating a final sideslip angle Beta c, calculating an optimal control rudder instruction Rudc_p, calculating an optimal control aileron instruction Ailc_p, determining a rudder comprehensive instruction Rudc1, determining a rudder input instruction Rudc, calculating an aileron comprehensive instruction Ailc1 and calculating aileron input instruction Ailc. The improved large aircraft lateral gust moderating method, disclosed by the invention, enhances the effect of gust moderating and improves comfort for passengers.

COMPENSATED MOTOR TORQUE WIND TURBINE, constituted by a single blade (12) rotor (1) attached to a low speed shaft (3) with spindle (2) sustained in a nacelle (9), on gear bearing (7), at the end of the tower (8), being the power train elements: multiplier (5), generator (6) and brake (13) suspended from the nacelle (9) through a first bearing (4) aligned with the low speed shaft (3), forming a pendulum set (28) that allows them to rotate, compensating in its angular motion the rotor (1) torque, said pendulum set (28) accumulates potential energy when rising in its angular motion and releases it when the gust stops by descending and turning in the opposite direction of the rotation of the turbine's rotor (1) restituting turns to the generator's (6) rotor, being this effect a power regulator.

Embodiments of the invention provide a wind power field gust prediction method and system. The method comprises the following steps: 1) monitoring gust information of wind measurement nodes located at the periphery of a wind power field; 2) marking the wind measurement node, which firstly monitors gust, as a current wind measurement node, projecting the current wind measurement node and various wind power machine sets on a wind direction of the gust, obtaining projection distances of the current wind measurement node and the various wind power machine sets on the wind direction of the gust, and determining an upstream and downstream relationship between the various wind power machine sets; and 3) according to the gust information of the current wind measurement node, the projection distances of the current wind measurement node and the various wind power machine sets on the wind direction of the gust, and the upstream and downstream relationship between the various wind power machine sets, calculating gust information when the gust at the current wind measurement node arrives at the various wind power machine sets. According to the technical scheme of the invention, prediction of the gust in the wind power field is achieved, and then a foundation is laid for improvements of power generation efficiency and safety of the wind power machine sets.

A wake vortex alleviator is provided. The wake vortex alleviator produces rapid variations in the position of vortices emanating from aerodynamic surfaces by using an active flap that moves span-wise back and forth along the outboard section of the surface. Rapidly moving the flap back and forth in a slot at an appropriate frequency will cause the vortex to oscillate, resulting in interaction between other vortices and subsequent destruction much earlier than it would occur naturally. The slot is positioned near the aerodynamic surface trailing edge and generally transverse to a chord line of the aerodynamic surface. The flap can be moved using a variety of actuators to position, translate and stow the flap. The oscillation frequency and position are guided by information feedback according variations in lift in the aerodynamic surface, such as wind gusts. The flaps can control yaw, roll and pitch of the aerodynamic surface.

The invention discloses a signal processing method of a wireless anemobiagraph, which comprises the steps of: analyzing signals in a certain time interval according to a wind speed and a wind direction in the signals subjected to A/D (Analog-to-Digital) conversion by the wireless anemobiagraph, calculating a horizontal average wind speed, a horizontal average wind direction, a vertical average wind speed, a vertical average wind direction as well as turbulence intensities, gust factors, turbulence integral scales and fluctuating wind power spectrums in a down wind direction, a horizontal wind direction and a vertical wind direction; fitting the fluctuating wind power spectrums in the horizontal wind direction and the vertical wind direction by adopting a Kaimal spectrum and a Panofsky spectrum to obtain a coefficient of a power spectrum density function; and storing a calculating result to a data storage of the wireless anemobiagraph, and compiling all relevant embedded calculating programs. According to the invention, demands of signal characteristics and wind load analysis of the wireless anemobiagraph are fully considered, automatic calculation of wind filed characteristic parameters is realized in the wireless anemobiagraph, and data transmission quantity of the wireless anemobiagraph and later stage analysis workload of the wind load data are greatly reduced.

The technology of all weather wind turbine is disclosed by applying it to a savonius design wind turbine although it can be applied to all kinds of windmills based on rotational mechanism in general and specifically in the field of wind turbines. In this current embodiment the art is used to a savonius design rotor. A Savonius rotor assembly includes two blades. Each of the blades has an outer edge and an inner edge with the outer edges of the blades lying on a circle which define the diameter of the rotor. Each of the blades has a linear portion adjacent to the inner edge and a first curved portion which is substantially an arc of a circle tangent to the linear portion and tangent to the circle defining the rotor diameter. A second curved portion is substantially coincident to the circle defining the rotor diameter. In some applications multiple blades or multiple units are mounted in layers for more torque. The major modifications however from savonius type turbine are as follows: First feature of this preferred embodiment is the free sliding movement of rotor blades/air foils cushioned by elastics/springs and balanced by counter weights. Secondly a smart self regulating system, enabling the assembly not only to survive the windy storms but also provide steadier RPMs by shutting the wind inlet gates, corresponding to the increase in RPMs caused by the gusty winds. The central shaft between the air foils can be eliminated if so desired to give free passage to the air to improve efficiency however the basic emphasis is on the principle of automatic governor mechanism rather than the rotor blade shape or angle of curve.

A wind turbine has a Lidar device to sense wind conditions upstream of the wind turbine. Wind speed signals from the wind turbine are processed to detect an extreme operating gust. The detection is performed by differentiating the axial wind velocity and filtering for a period of time. On detection of extreme operating gust the system controller takes necessary evasive action which may include shutting down the turbine or varying the blade pitch angle.

The invention discloses a gust generating device for wind tunnel experiments, which relates to the field of aircraft aerodynamic experiment research, can realize gust load slowing down and actively control the gust flow field environment required for wind tunnel experimental research, and is useful for the structural design of aircraft and improving the safety of aircraft Sex and comfort provide an important theoretical basis. The invention includes: the gust generator is a longitudinal gust generator, which can generate a stable simple harmonic flow field in the vertical direction, and is mainly composed of a driving mechanism, a blade cascade swing mechanism, a control system and a frame. The invention is applicable to the field of experimental gust generation.