WO2005100147A1 - Positionierungsvorrichtung für ein frei ausfliegendes drachenartiges windangriffselement bei einem wasserfahrzeug mit windantrieb - Google Patents
Positionierungsvorrichtung für ein frei ausfliegendes drachenartiges windangriffselement bei einem wasserfahrzeug mit windantrieb Download PDFInfo
- Publication number
- WO2005100147A1 WO2005100147A1 PCT/EP2005/004183 EP2005004183W WO2005100147A1 WO 2005100147 A1 WO2005100147 A1 WO 2005100147A1 EP 2005004183 W EP2005004183 W EP 2005004183W WO 2005100147 A1 WO2005100147 A1 WO 2005100147A1
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- WO
- WIPO (PCT)
- Prior art keywords
- wind
- positioning device
- winch
- rope
- kite
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H9/00—Marine propulsion provided directly by wind power
- B63H9/04—Marine propulsion provided directly by wind power using sails or like wind-catching surfaces
- B63H9/06—Types of sail; Constructional features of sails; Arrangements thereof on vessels
- B63H9/069—Kite-sails for vessels
- B63H9/071—Kite-sails for vessels for use in combination with other propulsion means, e.g. for improved fuel economy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H9/00—Marine propulsion provided directly by wind power
- B63H9/04—Marine propulsion provided directly by wind power using sails or like wind-catching surfaces
- B63H9/06—Types of sail; Constructional features of sails; Arrangements thereof on vessels
- B63H9/069—Kite-sails for vessels
- B63H9/072—Control arrangements, e.g. for launching or recovery
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B2035/009—Wind propelled vessels comprising arrangements, installations or devices specially adapted therefor, other than wind propulsion arrangements, installations, or devices, such as sails, running rigging, or the like, and other than sailboards or the like or related equipment
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T70/00—Maritime or waterways transport
- Y02T70/50—Measures to reduce greenhouse gas emissions related to the propulsion system
- Y02T70/5218—Less carbon-intensive fuels, e.g. natural gas, biofuels
- Y02T70/5236—Renewable or hybrid-electric solutions
Definitions
- the invention relates to a positioning device for a free-flying kite-like wind attack element in a watercraft with wind propulsion.
- Such a positioning device is known from
- the invention has for its object to provide a positioning device of the type indicated above, which does not have the disadvantage mentioned and it ges tattet to adjust the position of the windage element according to the wind conditions automatically.
- the invention is based on the finding that a positioning device for a free-flying kite-like wind engagement element with a Tragflachenprofil as exclusive drive, as an auxiliary or as an emergency drive over a traction cable is connected to a watercraft, in particular a ship going to sea, then can be achieved in a favorable manner, if the length of the traction cable in each case adapts to the atmospheric conditions. If automatic picking and picking is to take place, the limit force for picking is set to be greater than the limit force for picking, so that stable operation occurs without control oscillations.
- the output signal of an impending stall sensor is fed to a transducer which drives an onboard winch to shorten the haul rope so as to increase the windage member flow to such an extent the buoyancy of the windage element is sufficient to keep it at least in the air.
- the winch speed when fetching can be set to a fixed minimum value, which guarantees a flow velocity that is sufficient, the wind engagement element stable to fly.
- a minimum tension of the pull rope can be defined. Should this be fallen short of, the winch attracts and thus ensures the flow to the windage element.
- a defined voltage is exceeded as a result, the winch stops again and the normal flight condition is established. This achieves a simple, depending on two tensile force thresholds winch control.
- the winch can be provided in a preferred manner that the winch .
- This measure is characterized by the fact that dynamic loads on the wind engagement element and the traction cable can be reduced. This can happen when the torque rope length characteristic has a progressive moment, i. the more rope is completed, the greater the resistance of the winch. With such a characteristic, a gust of wind acting on the wind-engaging element first causes a rapid finning of a great deal of rope, but then a gentle braking of the system.
- the winch speed when lifting to be the minimum inflow velocity of the Wind attack element to maintain its ability to fly under load provided by the pull rope.
- navigational restrictions threaten to prevent the wind element from being guided.
- the catching and fining especially at elevated sea state, made in such a way that unwanted ship movements (roles, pounding, yaw) reduced become.
- the catching and Fieren thus takes place out of phase to the component of the ship movements in the cable direction, so that on the one hand the ship movements are reduced, but on the other hand also provided for a stable guidance of the windage element, since the forces acting on the pull rope forces are reduced.
- the winch is driven by a pressure medium, the winch drive in particular as a volume-adjustable hydraulic pump is trained.
- safety requirements can be met, which - for example, on tankers - limit the use of electric drives because of the existing fire risk.
- an emergency unit is provided for operating the winch, which ensures the required for operating the winch energy even in case of failure of the primary energy source.
- the actuating elements or the means for generating force are provided in the immediate vicinity of the wind engaging element, the corresponding control devices can also be provided there at least partially directly at the wind engagement element, so that even expensive and fault-prone signal transmission paths can be largely dispensed with.
- the change of the shape may be preferred by a symmetrical or asymmetrical change of the airfoil profile by influencing the orientation of its airfoil, by twisting the airfoil, by symmetrical and / or by asymmetrical change of the curvature of the airfoil and / or by changing the point of attack of the pull rope, respectively.
- the change in the aerodynamic properties can also be made via a change in the geometry of the airfoil profile, as it is manifested in the cross section of the kite or its camber.
- Such a change in shape is in a two-ply airfoil advantageously in a change in the distance between the two layers by corresponding elements.
- a double-sided and / or opposing actuation for the same-direction or asymmetrical change of the airfoil profile is effected by a single drive element.
- two ailerons are each operated in opposite directions, the neutral position forms the center position of both rudders.
- the change in the aerodynamic effect can preferably take place by adjusting or by lengthening or shortening of at least one control line by means of the drive element.
- At least one control line has at least one deflection or return in the form of a pulley, the pulley can serve both for over- and for reduction.
- control lines When the control lines form a matrix-like arrangement, it is easier to influence a dragon in the manner of a sliding screen. In this case, this arrangement refers to an area below the dragon, from which the aerodynamic actuations can be made together. In this case, it is favorable if different control lines are in each case driven collectively via a jointly driven actuating element, since this causes the Number of drive elements reduced.
- the jointly driven actuating element can consist, for example, of a rotatably mounted element, a rocker, a lever, a toothed belt pulley or the like, which is moved together by a drive motor.
- the individual control lines then lead to differently selected fastening points on the common actuating element, so that the respective stroke results from the geometry of the fastening location, with which the relevant control line is moved.
- the individual control lines can also be over or under-reduced by pulleys or the like. In this way, then sets the movement of the actuating element in the desired change in geometry of the entire or parts of the windage element.
- the drive element consists of an electric winch and / or a linear actuator, wherein the linear actuator is formed by a pneumatic element which expands under overpressure in the transverse direction and thereby shortened in its length or vice versa.
- a pneumatic element which expands under overpressure in the transverse direction and thereby shortened in its length or vice versa.
- Such elements are called “artificial muscle” and preferably pneumatically driven.
- a wind turbine is provided in a container provided in the vicinity of the wind-engaging element and streamlined, which acts on an electric generator, which then charges an electrical energy store.
- pneumatic elements as actuators and a turbine can be provided, which drives a downstream compressor, which then the pressure for the pneumatic Ele- supplies.
- a pressure accumulator As energy storage is used in this case, a pressure accumulator.
- the means for controlling the Windangriffsele ents are housed, which provide output signals for controlling the drive elements (actuators).
- means are provided, in particular, to determine a control signal for the drive element from a signal for the course of the vehicle, the wind direction and / or the wind speed.
- control is based on the direction and the speed of the apparent wind at the windfall element, since its orientation is thereby determined.
- the wind engagement element is preferably controlled by a self-control device (autopilot), wherein a sensor element is provided, which is followed by at least one, preferably designed as an accelerometer, transducer element which at least indirectly emits a control signal to the drive element.
- a sensor element is provided, which is followed by at least one, preferably designed as an accelerometer, transducer element which at least indirectly emits a control signal to the drive element.
- Another sensor element outputs an output signal with respect to its position and orientation in space, which is particularly related to the position of the ship.
- the flight control can be designed such that in the case of FIG a stall a drop in the wind arresting element is prevented. It has also proven to be advantageous if means are provided for a control signal for the spatial orientation of the windage element or for the Manöverfigu- ren externally connected by a watercraft
- advantageous signal transmission means are provided to transmit the third control signal from the on-board unit to the self-control device, which is preferably in this control signal is a differential GPS or other navigation signal, which contains information about the position of Windangriffsele ents to the vessel.
- the drive element and / or the sensor element is provided in the container, which also forms the point of application for the traction cable and emanate from the holding and control lines with which the wind engaging element is connected.
- This container is preferably designed aerodynamically favorable and can also have a wind turbine for energy production for the aerodynamic control of the windage element.
- the illustrated invention is particularly suitable for seagoing ships or those with trades in the area of large lakes.
- a generator driven by the flow of the water, in particular via a propeller or turbine, which supplies the generated electrical energy to an energy store, in particular a hydrogen generator.
- the hydrogen obtained by electrolytic splitting of the water is stored and held in a reservoir.
- windage element according to the invention is also synonymously referred to briefly as “dragon”. But it is also the name “wing” right, because it is an aircraft with wing function.
- FIG. 1 shows a ship drawn by the kite system according to the invention in an oblique plan view
- 1a is a coordinate system which serves as a reference system in the following description
- 1 b shows an embodiment of the windage element according to the invention in the form of a paraglider according to the invention
- 2 is a schematic diagram of the control of the inventive windage element in a schematic representation
- Fig. 3 shows the control of the wind propulsion system according to the invention as a block diagram in more detail as well as
- FIG 4 shows the positioning device according to the invention in block representation.
- a drawn by the dragon system of the invention ship is shown in the oblique top view.
- a wind-engaging member 1 is provided via a traction rope with a 1.1 'force application device 2, the egg nes in the bow vessel 4 is connected to the latter.
- the traction cable 1.1 is guided to a central nacelle 1.2, from which a number of tethers 1.3 emanates, which are guided to the designed like a paraglider with kite profile windage element 1 and give this the necessary shape.
- the apparent wind direction in the region of the wind engagement element 1 is designated by W.
- the corresponding wind vector is characterized by its size and direction.
- variable B characterizing the gustiness, which forms the mean time deviation of the wind speed from the mean value and can be represented as a scalar, which virtually forms the radius of a sphere around the tip of the wind vector W.
- a coordinate system is reproduced, which is used in the following description as a reference system.
- xs is the direction of travel of the vessel
- ys is the direction transverse to the direction of travel.
- the co-ordinate system is fixed with a point Ps of the Ship to think connected. This point is preferably the force attack point 2 in the bow area.
- the height hs corresponds to the direction of the axis z of the conventional coordinate system. It indicates the height above the reference point Ps.
- This reference point is preferably the location of the GPS antenna of an on-board GPS device so that the coordinates of a point outside of Ps at which another GPS device is located are obtained by subtracting the signals output by both devices Coordinates can be generated. (If the GPS antenna on board own GPS device is away from the reference point Ps, this can be taken into account by adding a fixed coordinate difference.)
- the direction of the vector V points to the nacelle 1.2 of the wind-engaging element 1.
- This is, as it were, a "geographical coordinate system", since the nacelle 1.2 or the wind-engaging element 1 essentially move on the surface of a sphere ,
- the azimuth angle ⁇ and elevation ⁇ thus give something like the geographical longitude and latitude of the position of the nacelle on the '"globe" spanned by the vector V.
- the length of the vector V is roughly the length of the pull rope 1.1, the sag should initially be disregarded.
- the nacelle 1.2 of the windage element is oriented according to its own coordinate system with the directions xk, yk and zk, where zk points in the direction of extension of the vector V.
- the rotation of the nacelle 1.2 of the windage element 1 about the vertical axis zk is designated by the yaw angle (Yaw).
- Yaw yaw angle
- Changing the yaw angle changes the direction of flight of the windage elements 1 causes.
- the yaw angle can be changed inter alia by the active control of (described further below) the brake flaps of the wind attack element 1 forming paraglider. It causes a change in direction, and this process is similar to the steering of a steering kite.
- a rotation about the longitudinal axis xk represents a rolling motion (roll) and is not actively controlled. From the rolling motion or the corresponding deviation of the direction of zk from V, the sag of the pull rope 1.1 can be determined by gravity, while the rotation about the transverse axis yk forms the pitch of the windage element about the transverse axis and by gusts and their Acting on the pull rope 1.1 may be caused.
- This frame of reference forms the basis for understanding the description of the ship-kite system described below.
- FIG. Lb an embodiment of a windage element according to the invention is shown schematically.
- the wind engaging element forms in the illustrated embodiment a glider 101 with a container 102 for the control, as will be described in more detail below.
- retaining lines 103 exit, which merge into branches 104 in the form of a linen tree, which are connected to a lower textile covering layer 105.
- An upper textile cover layer 106 forms the conclusion upwards.
- the two cover layers are held together by internal connecting lines or corresponding connecting elements, such as textile ribs, which are not visible in the figure, whereby the airfoil profile formed by the two cover layers is stabilized by an internal overpressure which extends through openings on the leading edge of the kite. in the drawing on the left), which in the drawing is also continued for reasons of clarity. are left.
- the direction of flight is indicated by the arrow 107.
- Fig. 2 is a schematic representation of the wind propulsion system according to the invention is shown as a block diagram. The picture also serves for orientation in the following description of the individual system components.
- the 100-th reference numerals used in the overview display also form the group designation of the system parts detailed below. (A dashed line 99 delimits those assemblies, which must be added to at least one conventional ship, so that it is additionally equipped with the wind drive according to the invention.)
- the wind attack system 100 comprises the windage element and the associated control system, as far as it is located directly at this is.
- the arrangement can be arranged either in a cable located at the end of the traction cable from which the tethers extend, or else be incorporated directly into the wind engagement element.
- the control system essentially comprises an autopilot which controls the attitude and trajectory control of the windage element.
- the wind attack system 100 is via the traction cable and a
- Winch 210 (including pull rope) and dashed communication paths to the on-board system 200 connected to a user interface 205 comprising a control system that controls both the kite position and provides the necessary control commands to the machine 5 and rudder 6 of the ship ,
- the on-board system is connected via various communication paths, which allow to specify both the kite position of the on-board system in principle as well as the wind attack system to receive information that are important for the on-board system.
- a navigation system 300 Upstream of the on-board system 200 is a navigation system 300, which transmits to the on-board system the route of the ship to be observed, taking into account costs, times, speed and wind utilization and optionally the wind direction and wind strength.
- the wind information may also include a marking which characterizes the gustiness of the wind. This can also still
- the navigation system is supported by the navigational information finder (moving map) 310.
- wind and wave information signals are generated which control the on-board system 200 and effect a corresponding adjustment of the kite system 100.
- the on-board system 200 further generates drive signals for the engine 5 and the rudder 6.
- the navigation system 300 is driven by a route system 400 that the path of the vessel above the the
- the route system 400 is controlled on the basis of predetermined data from an external station 500, which are compared with the data of a weather information system 600.
- the course data currently determined by the navigation system 300 are reported back to the external station 500 via a feedback link 301 (via radio, satellite).
- the data can also be received by other ships equipped with the system according to the invention and can be used for updating the weather system locally. be. In this way, current, locally caused course changes in the further external route specification can be considered as.
- kite system 100 depending on the heading data, is such that optimal weather conditions (currently prevailing winds and sea conditions) as well as the economic boundary conditions that are designed to maximize cost-saving ship operation Route presetting takes place.
- An emergency system 700 provides the necessary control commands in the event of an unforeseen event which forces immediate action in the form of an emergency maneuver.
- the signaling system and communication system are combined, which tunes the navigation with other road users.
- the signaling system includes navigation safety lighting as well as the transmission of own navigation data via radio, which inform other ships in the vicinity about the set wind attack system and the intended route or the current course Information exchange.
- FIG. 2 The main paths of the data flow are shown in FIG. 2 as solid lines, while the remaining message paths are shown in dashed lines.
- Fig. 3 the block 100, which includes the wind attack system, and the block 200 with the on-board system of Fig. 2 are shown in more detail.
- the positioning and control of the kite 101 will be described here.
- the Windrich Speed and wind speed information including caliper characteristic as well as sea state information, is transferred to a buffer 211 in which this data is stored for buffering. Since the wind direction and all settings of the kite refer to the apparent wind, the course information is unnecessary during processing.
- the adjustment and maneuvering of the windage element with respect to the ship does not require knowledge of the current course, since all maneuvers relate to the ship and to the effect of the apparent wind acting on the kite.
- the wind information originates when setting the kite 101 first from the weather information system 600 in Figure 2 when it comes to positioning the kite. However, as soon as its own wind measurement after the start is in function, the apparent wind is determined at the location of the windage element itself, since this is decisive for the positioning.
- the wind and sea data form a dataset which addresses a look-up table memory 212 for the target position and the maneuver type of the windage element.
- This look-up table is organized like a normal addressable memory, the output data of the buffer 211 addressing the individual memory locations as address signals in which the status data of the wind engagement element belonging to the addressed data are stored.
- Such a "look-up table” links the input and output data to one another in the manner of a "read-only memory” (ROM) in accordance with a predetermined functional relationship, so that it can be understood as a mathematical assignment (function).
- ROM read-only memory
- the corresponding blocks form only an exemplary realization and can also be replaced by any other functional elements or assemblies.
- This may be, for example, a microprocessor act, in which the control software is held in a corresponding memory or even to an electrical circuit, in which the functional relationship is determined in the manner of an analog computer by the participating electronic components.
- the presentation as a look-up table is chosen here for clarity, because a solution with a microprocessor, for example, is more difficult to represent because the various successive program steps require elaborate considerations as to which program parts are to be supplied to the microprocessor sequentially.
- control signals can be processed in parallel, although such switching elements that cause activation of the blocks shown at certain times and the corresponding regulations are not shown.
- switching elements that cause activation of the blocks shown at certain times and the corresponding regulations are not shown.
- the state data thus contain, on the one hand, the desired position of the wind engagement element, ie its direction with respect to the ship and the length of the pull rope to be deployed. In addition, if appropriate, they also contain information as to whether and, if so, according to which stored program the kite 101 should be maneuvered. While the dragon in some positions static ', ie out fixed, it is cheaper for ship operation in certain cases when the kite is performed dynamically, ie. predetermined flight figures are executed, since this causes its relative speed to the wind and as a result also increased its train performance. In another memory 213, the current position of the kite is determined, as determined by the kite 101's navigation system.
- the actual position of the kite recorded in the memory 213 relates to the ship and is preferably determined by subtraction of two GPS signals. These are firstly the GPS receiver 124 of the dragon 101 within the kite system 100, which is connected to the flying kite 101.
- the position data determined in the flight position of the kite 101 are transmitted by means of a transmitter 112 to a receiver 214, which is located aboard the ship.
- Another GPS receiver 215 is also provided on board the ship. Its output, along with the output of receiver 214, is applied to a subtractor 216 which generates the differential GPS signal.
- the difference position data are converted into polar coordinates, which relate to the distance between the winch 2 and into the position of the wind engagement element.
- the position determined by the differential GPS receiver thus formed is measured at intervals. averages. If it is insufficient in its precision, it can be supported by values determined by accelerometers 117, 119 and 120.
- the corresponding computations including integration are executed in the assembly 123. Since within the time intervals that need to be integrated, only the times elapse before the next GPS position signal, the integrators do not need to meet quality requirements that would guarantee stability over long periods of time. (The accelerometers are used to stabilize the maneuvers, as described below - thus receive a secondary function).
- an altimeter 129 preferably designed as an air pressure gauge, and an earth magnetic field sensor 128 are provided, the data of which are also supplied to the memory for the navigation signal 124.
- Another possibility for determining the actual position of the windage element in relation to the ship is the use of the data transmitted to the ship of the altimeter 129 and the Earth's magnetic field sensor 128. These data are transmitted on the ship in block 227 and recorded. In block 227, a difference is then formed with the data of the altimeter 233 on the ship and the earth's magnetic field sensor 234 on the ship. Is it the altimeter?
- weather data from block 600 can also be used to determine the air pressure on the ship.
- the position information determined in this way is fed to block 217 and, if necessary, adjusted with the GPS data. In this way, the position information of two independent systems is mutually supportive, and if one system fails, the data remains available.
- the desired position of the kite read out of the memory 212 is now fed on the one hand to a comparator 218 which outputs a signal if the actual position of the wind attack system 100 present in the memory 213 agrees with the setpoint position ü read from the memory 212 ,
- a data record which identifies the selected maneuver type is read out of the maneuver type memory 220 via an enable circuit 219.
- a static flight status can also be distinguished by the fact that the kite does not execute any maneuvers but retains its flying position it is the maneuver type "zero".
- the flight processor 116 now generates at its relevant output 125 via a corresponding drive element on the kite 101 by asymmetrical braking of the kite 101 or a corresponding aerodynamic deformation of curved flight in the predetermined sequence and duration.
- the other aerodynamic effects imposed by the other two outputs of the flight processor 116 Controlling are the hiring of the wing and reefing, as described below.
- a signal filtered by a high-pass filter is additionally supplied to the flight processor 116 with a staggered phase position superimposed on the control signal, so that oscillation is avoided.
- 125 yawing movements can be controlled via the output 125
- the hiring of the wing is set via the output 126.
- the ratio of flight resistance and buoyancy can be optimized by the amount of hiring a wing.
- the reefing of the kite 101 can be initiated via a further exit 127. A reef changes the buoyancy and drag and may be required for individual maneuvers.
- kite Since the kite is firmly guided on the pull rope, it is automatically stabilized by the pulling action of the rope in its buoyancy center with respect to its rolling and tilting movements. However, in order to rule out swinging, in each case a position signal from a roller transmitter 11-9 and an inclination transmitter 120 is transmitted via corresponding inverting high-pass filters 121 and 122 to the flight processor, so that jerky position changes of the windage element 101 are avoided and compensated.
- the selected maneuver type is read out, including the kite causes to execute a given cyclic flight program. If this type of maneuver is transmitted, the control is done automatically by the autopilot of the windage element, and the unit 200 does not need to respond unless the kite leaves its target position due to unforeseen events.
- the target position of the windage element 101 does not coincide with its predetermined position, it is that the default position read out of the memory 212 has changed - as is the case when the kite is set - or is it the kite in the course of maneuvering has left its position, the output signal at the output of the comparison 218 disappears, and the maneuver type of the memory 220 activated via the switching element 219 ends.
- the signal "zero" appears, which is interpreted by the autopilot of Windangrif ssystems 100 to the effect that the last stored maneuver is no longer executed.
- the actual position of the kite which is read out of the memory 213 and determined via GPS, is compared with the desired position from the memory 212 by means of a position correction unit 221 and a maneuver is determined, which moves the kite into the desired position leads.
- the correction unit 221 is again designed as a look-up table, wherein the desired and the actual position (again relative to the ship) are combined to form a common addressing signal and the marking of a corresponding correction maneuver of the windage element from the actual position A in the target Position B is read out. It should be noted that depending on the start and finish (and also, if necessary, depending on the wind and wave conditions) different maneuvers must be selected to maneuver the kite. With the specified measures but any kite maneuvers can be selected and executed.
- this data may be "looped" from the memory 211 through the lookup table memories 212 and 221 so that they are still present in the specific maneuver selection record and a suitable maneuver can be selected.
- general adjustment guidelines which may include, for example, that when the sea is high, the kite is flown relatively so that the forces acting on the vessel by the wave direction can be compensated for. So in heavily krDeutschendem ship would be 'a dragon position with transverse component and favor a preliminary component in heavily pounding the ship.
- an output signal of the sea clipping block 231 is directly supplied to the block 211 to add information which participates in the selection of the corresponding kite position and maneuvering in the sense described above.
- Another function of this connection is to select parts of flight maneuvers to counteract the accelerations due to the sea. This implies that maneuvers with cyclical trajectories, in which different traction forces act on the traction cable at different times, are flown in such a way that these forces occur out of phase with the accelerations caused by the sea state. In this way, the ship movements are reduced overall. This compensation or reduction of ship movements by different traction forces, which are caused by maneuvering ', interfere with the other methods used for the seaway not compensation. This, has its reason in that of reduced ship movements require less effort to reduce their impact on the hang gliding trajectory. Because of the compensation of the individual ship movements, reference is made to the description of block 231 below.
- the right-hand part of the memory 220 is addressed via a switching element 222 with the data set read out from the correction unit 221, the switching element 222 being activated by the output signal of the comparator by means of an inverter 223, if the switching element 219 is not activated, ie and actual position are unequal.
- a multi-directional dynamic pressure gauge 111 provided on the kite forms an anemometer and, on the other hand, transmits the condition of too small a flow of the kite by a corresponding signal which, together with the generation of a position change maneuver, also drives the winch control 240, as a result of which the kite is accelerated at the position change, so that the flow is raised again. (It can be seen that the winch is also at
- the wind gauge in different directions directed Pitot tubes with pressure cans, which are evaluated separately. From the pressure values of the three orthogonal pressure cans with the highest pressure values, the direction and speed of the wind with respect to the orientation of the wind meter 111 can be determined. If the output signal of the magnetic field sensor 128, which contains a bridge circuit of magnetically sensitive resistors and thus makes it possible to determine the direction of the field lines of the earth's magnetic field, is taken into account, then the direction of the wind can be referred to the north direction and can thus be referred to as the direction of the apparent wind in Windabzugselement be transferred to the vessel. There then, where appropriate, the correction of magnetic north to geographic north.
- An arrow directed to the block 211 indicates that the normal navigation of the kite is disabled. Via an OR gate 224, which is connected upstream of the inverter 223, the rest of the normal maneuver control is also suppressed. (This also applies accordingly to the blocks 228, 229, 230 and 232 to be described below, which trigger further special functions.) The associated signal connections have been omitted there for reasons of clarity.)
- the emergency maneuver "emergency shedding" is initiated via block 228 by selecting and starting the associated maneuver type via the right hand part of the maneuver type memory 220b containing the respective programming
- This maneuver becomes necessary when the wind attack element for the ship has been caused by adverse circumstances or an accident danger (eg colliding with an obstacle): In this maneuver, the windage element is completely separated from the ship.
- the blocks "set” 229 and “mountains” 230 are used to select the appropriate maneuvers by selecting and starting the relevant maneuver. Maneuver type introduced via the right part of the Manövertyp notess 220b containing the respective programming.
- the acceleration component directed in the direction of the traction cable is determined via a suitably oriented acceleration sensor and, after integration, a signal is generated which describes the ship movements in the direction of the traction cable.
- This signal is supplied to the on-board GPS receiver which provides a position signal corrected for the position of the winch control 240 if the receiver or antenna is not itself mounted in this position. If this GPS position signal were transmitted directly together with the GPS signal received via the receiver 214.
- the accelerometer's integrated signal is additionally supplied to the GPS receiver 215 in block 231 to be subtracted (as a disturbance) from the signal to block 216 for processing is supplied, so that there the position signal of a "calm platform" is processed.
- block 231 directly connects to winch control 240.
- the latter immediately receives the command to fetch and retrieve through the block 231, in accordance with the determination of the swaying motion in the direction of the cable, so that the ship movements for the kite are directly compensated. Only if, for some reason, this compensation should no longer be sufficient, a position correction is triggered by a corresponding maneuver.
- control commands can be transmitted directly to the autopilot unit and the winch control 240 in the left part 220a of the manual command maneuver memory, suppressing the remaining signal output from this memory.
- These are the functions "Left”, “Right”, “Straight”, “Reffen”, “Recover”, “ recruit (+)” *, “ recruit (-)”, “Winch (+)” and “ Winsch (-) ". All commands can be modulated in their intensity.
- a "predictive maneuvering" takes place in such a way that fictitious wind and course data are entered into the system for calculating the current position of the wind attack element and the configuration then being displayed for information.
- the ship's command can then estimate the predictable behavior of the system and set the navigation accordingly.
- additional memory means and comparator means are provided which allow a storage of signals associated with preceding times with signals appearing later in time in such a way that temporally successive maneuvering states are comparable on the basis of different - also more fictitious - input data.
- FIG. 4 shows an embodiment of the winch control 240 according to FIG. 3 of the positioning system according to the invention for a wind propulsion system.
- the mechanical elements of the winch are grouped on a common drive shaft 244.
- the output signal of the right-hand part of the memory 220b in FIG. 3, which represents the length of cable to be deployed becomes one
- Memory 245 supplied, which holds this nominal pitch as a digital count.
- the digital value contained in the memory 245 is supplied to a proportional comparator 246, which subtracts this value from another value supplied to it by a pulse counter 247.
- This pulse counter 247 is in turn driven by a - in particular photoelectrically operating - position sensor 248, which is connected to a cable 11 leading the tensioning cable 249.
- the spread length of the pull cable 11 can also be transmitted in other ways. For example, on the pull rope itself mounted optical, magnetic or other markings that are detected by corresponding sensors.
- the traction cable 11 is frictionally driven by a multiple wrap around the spill head 249, wherein the rope is mounted in a storage space 250 shown only schematically.
- the pull rope can also be handled by a cable drum, which then replaces the spill head.
- a cable drum which serves as a cable storage. Otherwise, the structure remains the same.
- the spill head to 249 is driven by a motor 251.
- the engine preferably has an integrated, unspecified transmission.
- the pulse counter 247 thus determines the actual unwound cable length by counting the output from the position sensor 248 in the pulse, the number of which is proportional to the rotation of the capstan head 249.
- the length can be determined by a directly resting on the rope friction wheel with pulser.
- the signal output by the proportional comparator 246 thus corresponds, depending on its polarity, to the cable length still to be wound up or unwound from the capstan head.
- This output signal of the proportional comparator 246 is fed directly as a proportional component via a summing point 260 to a characteristic generator 252, which generates a control signal proportional to the cable length for the motor 251.
- the output signal of the characteristic generator is limited to a linear course to high and low value out, so that there is a non-linear characteristic.
- the steepness of the characteristic curve is adapted to the cable properties insofar as this also prevents overstretching.
- the linear range of the characteristic curve is adapted to the elasticity properties of the cable, while in the event of imminent overloading there is a force limitation so that the cable can run freely when it threatens to break.
- the activation of the motor 251 is preferably proportional to the length of rope to be deployed or retracted. This results in a characteristic of the drive, which is comparable to that of a spring. If the illustrated motor 251 is an electric motor whose torque is proportional to the supplied current, it is sufficient to connect the output of the characteristic generator 252 to the power source 253, which in this case is the current source.
- the characteristic generator specifies a torque for the respective input variable, which is to act on the engine output shaft.
- the steepness of the characteristic curve defines the "reactivity" of the winch to the corresponding control signals. It is adjustable to cope with various operating conditions (for example, the size of the windage element). During operation, the steepness of the characteristic curve is adjusted so that the winch movements settle below a too "nervous" reaction behavior.
- the energy source 253 provides a different amount of energy, which does not directly lead to a proportional torque at the drive motor 251.
- the motor 251 as a steam or hydraulic motor - in particular as volume adjustable hydraulic motor or as a pairing volume adjustable hydraulic pump and hydraulic motor - be executed, wherein on the output shaft, a torque measuring device 254 is provided whose output signals downstream of the characteristic generator 252 Feedback point 255 is supplied with negative polarity.
- the signal emitted by the energy source is thereby increased until it is compensated by the negative feedback signal from the torque measuring device 254.
- the desired characteristic can be generated with any drive motors.
- an integrator 256 is switched on, which prevents a permanent control deviation in the adjustment of the cable length in that it increases or decreases the signal supplied to the characteristic generator the longer it is present.
- an adjustable filter 258 parallel to it is an adjustable filter 258 with a downstream
- Subtracting point 259 is turned on, wherein the filter is dimensioned so that it is permeable especially for resonant frequencies of the rope including winch and this suppressed by negative feedback.
- the filter 258 is variable in frequency, the frequency setting being affected by the output of the pulse counter 247, which outputs a value corresponding to the applied pitch.
- the filter is changed in its frequency according to the rope length, so that possible resonances, which are influenced in terms of their frequency by the rope length, are compensated.
- only the tendency of the change is taken into account, once assuming a linear adjustment.
- a precise adjustment is to be achieved, which follows the quadratic or other functional course, then a corresponding function transmitter is to be switched into the line of the pulse counter, which also in the form of a digital look-up table corresponding to Other illustrated embodiments may be designed.
- the corresponding control variable is outputted for setting the desired filter frequency.
- these are the corresponding digital control commands.
- a voltage generator is programmed by the corresponding control variable for setting the corresponding output voltage for control.
- the circuit shown is a digital control, so that the integrator 256 and the filter 258 also operate digitally.
- the output signal of the position generator 248 gives a measure of the forces acting on the kite and their time course, so that it can be used for the evaluation of kite activity.
- an acceleration sensor 265 is provided, which is effectively installed in the direction of the cable direction in the vicinity of the winch.
- a downstream integrator 266 converts the detected acceleration values into corresponding path signals, which also act in the direction of the cable.
- a preferably designed as a disc brake brake 261 is provided on the motor shaft for such cases when, for example, in calm sea no rope movements are neces sary. It is by a differentiator 262 with downstream Schmitt trigger 263 is driven, which only emits a signal when the output of the Differenziereis 262 exceeds a predetermined value, ie, the driving voltage for the motor 251 changes. The output of the Schmitt trigger then releases the brake via an inverter 264 (and a corresponding driver, not shown) and activates the power source (driver) for the motor. Otherwise, the brake 261 remains energized and deactivated. This also power for the drive motor 251 is saved.
- a band brake acting directly on the capstan head 249 may also be provided. This is advantageous, for example, in view of the double safety demanded by some approval authorities, since braking of the capstan head is possible even if the motor gear or the shaft 244 breaks.
- the assembly 231 (see FIG. 3), which has an acceleration sensor 265, which acts in the cable direction.
- the output of the accelerometer 265 becomes a Integrator 266 supplied, which converts the accelerations in a distance in the cable direction.
- the signal then arrives at a summing junction 257 via a downstream dosing device / inverter in order to be fed to the proportional comparator 246.
- Assembly 267 alters the position of the kite 101 with respect to the ship at each of the seaward movements by fetching and hauling the rope so as to maintain its height with respect to the averaged sea surface and be unaffected by the ship's motions. This is particularly favorable low wind conditions and prevailing threshold, if the flight of the kite should not be influenced by additional forces.
- the potentiometer 267 is provided, which enables a metering and polarity reversal of the output signal of the integrator 266. In this way, it is possible to dose and also reverse in polarity the proportion with which the integrated ship movement signal acts on the kite position, so that it can either steam the movements of the kite or the movements of the ship.
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Navigation (AREA)
- Wind Motors (AREA)
- Toys (AREA)
- Control Of Position, Course, Altitude, Or Attitude Of Moving Bodies (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Control Of Turbines (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Vehicle Waterproofing, Decoration, And Sanitation Devices (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
Description
Claims
Priority Applications (14)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT05737834T ATE460337T1 (de) | 2004-04-19 | 2005-04-19 | Positionierungsvorrichtung für ein frei ausfliegendes drachenartiges windangriffselement bei einem wasserfahrzeug mit windantrieb |
DE502005009192T DE502005009192D1 (de) | 2004-04-19 | 2005-04-19 | Positionierungsvorrichtung für ein frei ausfliegendes drachenartiges windangriffselement bei einem wasserfahrzeug mit windantrieb |
JP2007508828A JP4934023B2 (ja) | 2004-04-19 | 2005-04-19 | 風力船舶の自由に飛行する凧タイプの風を受ける要素の位置決めデバイス |
NZ550719A NZ550719A (en) | 2004-04-19 | 2005-04-19 | Positioning device for a free-flying kite-type wind-attacked element in a wind-powered watercraft |
US11/578,817 US7546813B2 (en) | 2004-04-19 | 2005-04-19 | Positioning device for a free-flying kite-type wind-attacked element in a wind-powered watercraft |
AU2005232887A AU2005232887B2 (en) | 2004-04-19 | 2005-04-19 | Positioning device for a free-flying kite-type wind-attacked element in a wind-powered watercraft |
KR1020067021724A KR101206748B1 (ko) | 2004-04-19 | 2005-04-19 | 풍력선의 자유비행 카이트식 수풍 부재를 위한 포지셔닝장치 |
PL05737834T PL1740452T3 (pl) | 2004-04-19 | 2005-04-19 | Urządzenie pozycjonujące dla swobodnie wzlatującego latawcowego aktywnego elementu aerodynamicznego na wodnym środku transportowym z napędem wiatrowym |
DK05737834.1T DK1740452T3 (da) | 2004-04-19 | 2005-04-19 | Positioneringsindretning til et frit udflyvende, dragelignende vindangrebselement ved et vandfartøj med vinddrev |
EP05737834A EP1740452B1 (de) | 2004-04-19 | 2005-04-19 | Positionierungsvorrichtung für ein frei ausfliegendes drachenartiges windangriffselement bei einem wasserfahrzeug mit windantrieb |
NO20064623A NO20064623L (no) | 2004-04-19 | 2006-10-11 | Posisjoneringsanording for drageliknende element pa et vinddrevet fartoy |
HK07106546.9A HK1101567A1 (en) | 2004-04-19 | 2007-06-18 | Positioning device for a free-flying kite-type wind-attacked element in a wind-powered watercraft |
US12/387,107 US7798083B2 (en) | 2004-04-19 | 2009-04-28 | Positioning device for a free-flying kite-type wind-attacked element in a wind-powered watercraft |
AU2009202050A AU2009202050B2 (en) | 2004-04-19 | 2009-05-25 | A positioning device for a free-flying kite-type wind-attacked element in a wind-powered watercraft |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004018838A DE102004018838A1 (de) | 2004-04-19 | 2004-04-19 | Positionierungsvorrichtung für ein frei ausfliegendes drachenartiges Windangriffselement bei einem Wasserfahrzeug mit Windantrieb |
DE102004018838.6 | 2004-04-19 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/578,817 A-371-Of-International US7546813B2 (en) | 2004-04-19 | 2005-04-19 | Positioning device for a free-flying kite-type wind-attacked element in a wind-powered watercraft |
US12/387,107 Continuation US7798083B2 (en) | 2004-04-19 | 2009-04-28 | Positioning device for a free-flying kite-type wind-attacked element in a wind-powered watercraft |
Publications (1)
Publication Number | Publication Date |
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WO2005100147A1 true WO2005100147A1 (de) | 2005-10-27 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/EP2005/004183 WO2005100147A1 (de) | 2004-04-19 | 2005-04-19 | Positionierungsvorrichtung für ein frei ausfliegendes drachenartiges windangriffselement bei einem wasserfahrzeug mit windantrieb |
Country Status (17)
Country | Link |
---|---|
US (2) | US7546813B2 (de) |
EP (2) | EP2075190B1 (de) |
JP (1) | JP4934023B2 (de) |
KR (1) | KR101206748B1 (de) |
CN (1) | CN100575188C (de) |
AT (1) | ATE460337T1 (de) |
AU (2) | AU2005232887B2 (de) |
CY (1) | CY1110174T1 (de) |
DE (2) | DE102004018838A1 (de) |
DK (2) | DK2075190T3 (de) |
HK (2) | HK1101567A1 (de) |
NO (2) | NO20064623L (de) |
NZ (2) | NZ550719A (de) |
PL (2) | PL1740452T3 (de) |
RU (1) | RU2359864C2 (de) |
SG (1) | SG151337A1 (de) |
WO (1) | WO2005100147A1 (de) |
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DE102004018814A1 (de) * | 2004-04-19 | 2005-11-03 | Skysails Gmbh | Setzsystem für ein ausfliegendes drachenartiges Windangriffselement bei einem Wasserfahrzeug mit Windantrieb |
-
2004
- 2004-04-19 DE DE102004018838A patent/DE102004018838A1/de not_active Withdrawn
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2005
- 2005-04-19 EP EP09003896A patent/EP2075190B1/de active Active
- 2005-04-19 AU AU2005232887A patent/AU2005232887B2/en not_active Ceased
- 2005-04-19 DE DE502005009192T patent/DE502005009192D1/de active Active
- 2005-04-19 CN CN200580020232A patent/CN100575188C/zh not_active Expired - Fee Related
- 2005-04-19 NZ NZ550719A patent/NZ550719A/en not_active IP Right Cessation
- 2005-04-19 NZ NZ577289A patent/NZ577289A/en not_active IP Right Cessation
- 2005-04-19 PL PL05737834T patent/PL1740452T3/pl unknown
- 2005-04-19 KR KR1020067021724A patent/KR101206748B1/ko not_active IP Right Cessation
- 2005-04-19 AT AT05737834T patent/ATE460337T1/de active
- 2005-04-19 SG SG200902307-8A patent/SG151337A1/en unknown
- 2005-04-19 PL PL09003896T patent/PL2075190T3/pl unknown
- 2005-04-19 JP JP2007508828A patent/JP4934023B2/ja not_active Expired - Fee Related
- 2005-04-19 DK DK09003896.9T patent/DK2075190T3/da active
- 2005-04-19 DK DK05737834.1T patent/DK1740452T3/da active
- 2005-04-19 RU RU2006140779/11A patent/RU2359864C2/ru not_active IP Right Cessation
- 2005-04-19 WO PCT/EP2005/004183 patent/WO2005100147A1/de active Application Filing
- 2005-04-19 US US11/578,817 patent/US7546813B2/en active Active
- 2005-04-19 EP EP05737834A patent/EP1740452B1/de active Active
-
2006
- 2006-10-11 NO NO20064623A patent/NO20064623L/no not_active Application Discontinuation
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2007
- 2007-06-18 HK HK07106546.9A patent/HK1101567A1/xx unknown
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2009
- 2009-04-07 NO NO20091417A patent/NO20091417L/no not_active Application Discontinuation
- 2009-04-28 US US12/387,107 patent/US7798083B2/en active Active
- 2009-05-25 AU AU2009202050A patent/AU2009202050B2/en not_active Ceased
- 2009-12-29 HK HK09112261.8A patent/HK1137397A1/xx unknown
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2010
- 2010-06-10 CY CY20101100511T patent/CY1110174T1/el unknown
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US7504741B2 (en) | 2006-03-31 | 2009-03-17 | Skysails Gmbh & Co. Kg | Wind energy plant with a steerable kite |
US8080889B2 (en) | 2006-04-24 | 2011-12-20 | Kite Gen Research S.R.L. | Aeolian system comprising power wing profiles and process for producing electric energy |
WO2008019700A1 (de) | 2006-08-15 | 2008-02-21 | Skysails Gmbh & Co. Kg | Start- und bergevorrichtung für ein aerodynamisches profilelement und aerodynamisches profilelement |
US7287481B1 (en) | 2006-08-15 | 2007-10-30 | Skysails Gmbh & Co. Kg | Launch and retrieval arrangement for an aerodynamic profile element and an aerodynamic profile element |
KR101315626B1 (ko) | 2006-09-14 | 2013-10-08 | 스카이세일즈 게엠베하 앤 컴퍼니 케이지 | 자유 비행하는 제한된 날개 요소의 조향 유닛 |
WO2008031446A3 (en) * | 2006-09-14 | 2008-10-02 | Skysails Gmbh & Co Kg | Steering unit for free flying, confined wing element |
AU2006348120B2 (en) * | 2006-09-14 | 2013-07-25 | Skysails Gmbh & Co. Kg | Steering unit for free flying, confined wing element |
US8215588B2 (en) | 2006-09-14 | 2012-07-10 | Skysails Gmbh & Co. Kg | Steering unit for free flying, confined wing element |
WO2008072269A1 (en) | 2006-12-11 | 2008-06-19 | Kite Gen Research S.R.L. | System for performing the automatic control of the flight of kites |
US8100366B2 (en) | 2006-12-11 | 2012-01-24 | Kite Gen Research S.R.L. | Automatic kite flight control system |
WO2009071105A1 (en) | 2007-12-04 | 2009-06-11 | Skysails Gmbh & Co. Kg | Aerodynamic wind propulsion device and method for controlling |
WO2009080098A1 (en) * | 2007-12-19 | 2009-07-02 | Skysails Gmbh & Co. Kg | Aerodynamic wind propulsion device having active and passive steering lines and method for controlling of such a device |
US8607722B2 (en) | 2007-12-19 | 2013-12-17 | Skysails Gmbh & Co. Kg | Aerodynamic wind propulsion device having active and passive steering lines and method for controlling of such a device |
AU2007362757B2 (en) * | 2007-12-19 | 2013-09-19 | Skysails Gmbh & Co. Kg | Aerodynamic wind propulsion device having active and passive steering lines and method for controlling of such a device |
EP2123550A2 (de) | 2008-05-21 | 2009-11-25 | KYOKUYO Shipyard Co. Ltd. | Frachtschiff mit geringem Kraftstoffverbrauch |
JP2009280067A (ja) * | 2008-05-21 | 2009-12-03 | Kyokuyo Shipyard Co Ltd | 低燃費型輸送船 |
US8695924B2 (en) | 2008-05-30 | 2014-04-15 | Skysails Gmbh & Co. Kg | Aerodynamic wing with improved line attachment |
WO2009143901A1 (en) * | 2008-05-30 | 2009-12-03 | Skysails Gmbh & Co. Kg | Kite type sail with improved line attachment |
WO2010020263A2 (en) * | 2008-08-20 | 2010-02-25 | Skysails Gmbh & Co. Kg | Aerodynamic wind propulsion device having bielastic line coupling |
WO2010020263A3 (en) * | 2008-08-20 | 2010-05-06 | Skysails Gmbh & Co. Kg | Aerodynamic wind propulsion device having bielastic line coupling |
US8740153B2 (en) | 2008-08-20 | 2014-06-03 | Skysails Gmbh & Co. Kg | Aerodynamic wind propulsion device having bielastic line coupling |
FR2942200A1 (fr) * | 2009-02-18 | 2010-08-20 | Herve Bailly | Systeme de controle-commande automatique pour une aile de traction a quatre lignes controlee par ses freins pour la traction de bateau |
WO2011121557A2 (en) | 2010-03-31 | 2011-10-06 | Kitenergy S.R.L. | Actuating systems for controlling the flight of a power wing profile for conversion of wind energy into electrical or mechanical energy |
US9366225B2 (en) | 2010-03-31 | 2016-06-14 | Kitenergy S.R.L. | Actuating systems for controlling the flight of a power wing profile for conversion of wind energy into electrical or mechanical energy |
WO2013164443A1 (en) | 2012-05-03 | 2013-11-07 | Skysails Gmbh | Aerodynamic wind energy conversion device and method for controlling such a device |
CN104379443A (zh) * | 2012-05-03 | 2015-02-25 | 天帆有限责任公司 | 气动风能转换装置及控制该装置的方法 |
WO2013164446A1 (en) | 2012-05-03 | 2013-11-07 | Skysails Gmbh | Mast arrangement and method for starting and landing an aerodynamic wing |
US20150130188A1 (en) * | 2012-07-22 | 2015-05-14 | Leonid Goldstein | Airborne wind energy conversion system with ground generator and unorthodox power capture or transfer |
US9239041B2 (en) * | 2012-07-22 | 2016-01-19 | Leonid Goldstein | Airborne wind energy conversion system with ground generator and unorthodox power capture or transfer |
WO2015013728A3 (en) * | 2013-07-25 | 2015-12-17 | Wolfram Johannes Bernd Reiners | A steering arrangement |
US9828078B2 (en) | 2013-07-25 | 2017-11-28 | Wolfram Johannes Bernd Reiners | Steering arrangement |
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