SE545295C2 - A wind power plant nacelle configured to enabling a missile launch platform to be mounted to said wind power plant nacelle, and a method for mounting a missile launch platform to a wind power plant nacelle - Google Patents

Abstract

The present disclosure relates to a wind power plant nacelle (101) adapted to be mounted to a wind power plant tower (102). The wind power plant nacelle (101) comprises nacelle mounting means (103a-e; 123a-c; 109, 110) adapted to co-operate with corresponding platform mounting means (204a-e; 223a-c 213a-b, 214a-b), comprised in a missile launch platform (200), enabling a missile launch platform (200) to be mounted to the wind power plant nacelle (101). The wind power plant nacelle (101) comprises at least one nacelle interface means (106, 107, 108) adapted to provide transfer of at least one of communication and power between the wind power plant nacelle (101) and a missile launch platform (200) via corresponding connections (150, 151, 152).

Description

TITLE A vtfind povxfer plant confšotired to enabšind a :wwissiie launch platform to 'be rttoawted to vtfšnd povifei' pšartt nacešše. avd a method for rttotsrtirtd a :ttissile latsvch plattorna to a »vind pcvver nacešše TECHNICAL FIELD The present disclosure relates to missile launch platforms, and in particular to versatile and cost-effective missile launch platforms.

BACKGROUND The geopolitical situation today spurs a reinforcement of military defense systems whereof missiles is an important part.

Today missiles are provided in batteries, each battery comprising a plurality of missiles that normally are positioned in an array with a plurality of rows and a plurality of columns. These batteries are either in fixed bases or mobile, i.e. transported on military trucks or on military ships. New fixed bases are associated with the cost and time it takes to build suitable infrastructure and handle permit processes. New mobile units are also associated with a cost and the disadvantage that it may take a long time to bring the missiles into strategic positions, which additionally requires plenty of personnel and vehicles for its operation. lt is therefore desired to provide a solution where missile systems can be placed permanently, without the active operation personnel, co-located with planned or existing physical infrastructure, communication infrastructure and energy supply, in areas close to the perimeter of the protected territory, for instance on the coastline or even far out in the sea to provide a complementary, geographically advanced new defense line. Placement of missile systems, including radar units, in elevated positions would enhance early detection, response and interception of an incoming threat as e.g. military aircrafts, missiles or naval vessels from an antagonist. An early interception, where the threat is far away from the intended target, would also reduce the risk that debris from an incoming object falls down on the target or in adjacent areas and causes damage. An early first response would possibly also give time for a second response if the first attempt to intercept the threat fail. lt is therefore desired to provide a missile launch platform that is versatile and cost- effective, as well as a corresponding defense arrangement and defense system.

SUMMARY The object of the present disclosure is to provide mounting of a missile launch platform in a versatile and cost-effective manner, in order to obtain an effective defense arrangement and defense system.

This object is achieved by means of a wind power plant nacelle adapted to be mounted to a wind power plant tower. The wind power plant nacelle comprises nacelle mounting means adapted to co-operate with corresponding platform mounting means, comprised in a missile launch platform, enabling a missile launch platform to be mounted to the wind power plant nacelle, where the wind power plant nacelle comprises at least one nacelle interface means adapted to provide transfer of at least one of communication and power between the wind power plant nacelle and a missile launch platform via corresponding connections.

By being able to use the wind power plant nacelle as a host for a missile launch platform and associated technical systems, wind power installations can become a strategic asset to a military defense, offering permanent installations, with elevated positions favorable for launch of missiles as response to, and interception of threats. The wind power plant nacelle is prepared for mounting of a missile launch platform, such that a missile launch platform can be mounted to the wind power plant nacelle when, and if, deemed suitable.

The co-location of wind power and missile launch platform/system helps to solve the conflict of interest and instead creates synergies both in function as well as in lowering the total cost for upholding the functions of military defense and electricity production. The total cost for upholding both functions is reduced by sharing the same establishment, physical constructions, communication, and utility systems.

According to some aspects, the nacelle interface means comprises an interface for transfer of at least one of electrical power, pneumatic power and hydraulic power via at least one corresponding connection.

This means that a versatile interface setup can be provided that can accommodate any need for power and communications. Having a co-arrangement for power supply saves cost and reduces weight of a redundant energy supply arrangement. Reduced weight is beneficial since it reduces the need for reinforcement of the wind power plant nacelle.

According to some aspects, the wind power plant nacelle further comprises at least one nacelle rail that at least partly is adapted to support a missile launch platform.

This facilitates a construction where the load can be distributed evenly over the nacelle and can be connected to suitable load-bearing points from the nacelle construction and handle the extra weight from a missile launch platform, possibly with reinforcement of the nacelle.

According to some aspects, the nacelle mounting means comprise a plurality of electromagnetic pads that are adapted to attract corresponding ferromagnetic pads attached to a missile launch platform.

Energizing the electromagnetic pads will create attraction to corresponding ferromagnetic pads when these are sufficiently adjacent and work as a temporary fixation until permanent fixation nacelle rails with corresponding missile platform rails can be achieved.

This object is also achieved by means of missile launch platforms, defense arrangements, defense systems and methods that are associated with the above advantages.

BRIEF DESCRIPTION OF THE DRAWINGS The present disclosure will now be described more in detail with reference to the appended drawings, where: FigureFigureFigureFigure 4A Figure 4B FigureFigureFigure 7A Figure 7B Figure 8A Figure 8B Figureshows a schematic perspective front view of a wind power plant with a missile launch platform; shows a schematic perspective top view of a wind power plant nacelle with a missile launch platform; shows a schematic perspective front view of a wind power plant with a missile launch platform being mounted; shows a schematic side view of electromagnetic pads adapted to attract corresponding ferromagnetic pads; shows a schematic side view of electromagnetic pads that have attracted corresponding ferromagnetic pads; shows a schematic top view of a defense system; shows a schematic perspective top view of a wind power plant nacelle with a missile launch platform; shows a schematic perspective top view of a wind power plant nacelle with an opaque housing; shows a schematic perspective top view of a wind power plant nacelle with an opaque housing being removed; shows a schematic perspective side view of locking hook members about to engage nacelle rails; shows a schematic perspective side view of locking hook members that have engage nacelle rails; shows a flowchart illustrating methods according to the present disclosure; Figure 10 schematically illustrates a control unit arrangement; Figure 11 schematically illustrates a computer program product; Figure 12 shows a schematic perspective bottom view of a platform mounting member and a nacelle mounting member; and Figure 13 shows a flowchart i||ustrating methods according to the present disclosure.

DETAILED DESCRIPTION Aspects of the present disclosure will now be described more fully hereinafter with reference to the accompanying drawings. The different devices, systems, computer programs and methods disclosed herein can, however, be realized in many different forms and should not be construed as being limited to the aspects set forth herein. Like numbers in the drawings refer to like elements throughout.

The terminology used herein is for describing aspects of the disclosure only and is not intended to limit the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

Figure 1 shows a perspective view of wind power plant 100 comprising a wind power plant nacelle 101 mounted to a wind power plant tower 102, the wind power plant nacelle 101 comprising wind turbine blades 105a, 105b, 105c.

Wind power is an increasingly popular way to generate electricity since it has a competitive cost and very small climate change effect compared to most other energy sources. ln many parts of the world, wind power is deployed in large scale, often close to the coastline or in off shore wind energy parks, far out at sea, in order to get windy conditions. The rapid deployment of wind power and other sources of electricity being phased out is one of the most important means to combat climate change and is forecasted to grow exponentially in the coming decades. Today, wind power is however considered to disturb the ability to uphold a strong military defense. One main reason being that a wind energy park reduces the visibility for existing radar systems, especially for items close to the ground or sea level like low flying objects and naval vessels. This could lead to late detection of incoming threats and has led to a conflict between defense interests and the interest to generate renewable energy and to reduce climate change, both being paramount goals of society.

According to the present disclosure, with reference also to Figure 2 and Figure 6 that show detailed perspective views of the wind power plant nacelle 101, and figure 4A and Figure 4B, the wind power plant nacelle 101 comprises nacelle mounting means 103a-e; 123a-c; 109, 110 adapted to co-operate with corresponding platform mounting means 204a-e; 223a-c 213a-b, 214a-b, comprised in a missile launch platform 200, enabling a missile launch platform 200 to be mounted to the wind power plant nacelle 101. The wind power plant nacelle 101 comprises at least one nacelle interface means 106, 107, 108 adapted to provide transfer of at least one of communication and power between the wind power plant nacelle 101 and a missile launch platform 200 via corresponding connections 150, 151, Correspondingly, the present disclosure also relates to the missile launch platform 200 that comprises a plurality of missile holding chambers 201 and platform mounting means 204a-e; 223a-c 213a-b, 214a-b, adapted to co-operate with the corresponding nacelle mounting means 103a-e; 123a-c; 109, 110, enabling the missile launch platform 200 to be mounted to the wind power plant nacelle 101 as described herein. The missile launch platform 200 comprises at least one platform interface means 206, 207, 208 adapted to provide transfer of at least one of communication and power between the missile launch platform 200 and the wind power plant nacelle 101 via corresponding connections 150, 151, By using the wind power plant nacelle as a host for a missile launch platform and associated technical systems, wind power installations can become a strategic asset to a military defense, offering permanent installations, with elevated positions favorable for launch of missiles as response to, and interception of threats. The wind power plant nacelle 101 is prepared for mounting of a missile launch platform 200, such that a missile launch platform 200 can be mounted to the wind power plant nacelle 101 when, and if, deemed suitable. This means that all wind power plant nacelles 101 which are prepared for mounting of a missile launch platform 200 do not necessarily need to carry a missile launch platform A wind power plant nacelle 101 contains a number of different technical systems to control and maneuver the wind power plant during its operation and maintenance. One or more power supply sources are present and can be used also for operation and maneuvering of the missile launch platform 200. This co-arrangement saves cost and reduces weight of a redundant energy supply arrangement. Reduced weight is beneficial since it reduces the need for reinforcement of the wind power plant nacelle 101 and the wind power plant tower According to some aspects, the nacelle interface means comprises an interface 107, 108 for transfer of at least one of electrical power, pneumatic power and hydraulic power via at least one corresponding connection 151, Correspondingly, according to some further aspects, the platform interface means comprises an interface 207, 208 for transfer of at least one of electrical power, pneumatic power and hydraulic power via at least one corresponding connection 151, ln this context, although the connections 151, 152 are indicated as separate parts in Figure 6, the connections can be more or less integrated into one or more interface 107, 108; 207, ln this manner, a safe and uncomplicated supply of at least one of electrical power, pneumatic power and hydraulic power is provided. This also enables the co- arrangement mentioned above.

According to some aspects, as indicated in Figure 2 and Figure 6, the missile launch platform 200 further comprises a rotatable base 212 and displacing means 211 adapted to raise the missile holding chambers 201 such that an elevation displacement A1 is performed to an angle oi to the rotatable base 212. The displacing means 211 may for example be in the form of one or more hydraulic cylinders, or in the form of one or more electrically extendable cylinders, for example constituted by an electric motor that rotates a threaded rod which engages threads such that a linear displacement takes place in a previously well-known manner. The rotatable basecan be controlled to perform a base rotation A ln this way, the missile launch platform 200 can be directed in a desired direction both in elevation and azimuth, possible in view of the position of the wind power plant nacelle 101 that also may have a controllable position as will be discussed below.

Here, according to some aspects, there is a wireless communication nacelle interface 106 that is adapted to communicate with a wireless communication platform interface 206 via a wireless connection 150. Furthermore, there is an electric power nacelle interface 107 that is connected to an electric power platform interface 207 via an electric connection 151 that can be constituted by an electrical connection wire with a plurality of electrical connectors. There is also a hydraulic power nacelle interface 108 that is connected to a hydraulic power platform interface 208 via a hydraulic connection 151 that can be constituted by a hydraulic hose that is adapted for transfer of hydraulic fluid.

This is only an example of interfaces and connections, many other alternatives are conceivable. For example, there may be only an electric power nacelle interface 107 that is connected to an electric power platform interface 207 via an electric connection 151, with an integrated communication connection such as for example an optical fiber connection.

This means that a versatile interface setup can be provided that can accommodate any need for power and communications for the missile launch platform According to some aspects, the wind power plant nacelle 101 further comprises at least two nacelle rails 109, 110 that at least partly are adapted to support a missile launch platform According to some aspects, the missile launch platform 200 further comprises at least two missile platform rails 209, 210 that at least partly are adapted to support the missile launch platform As shown in figure 4A and 4B, according to some aspects, assembly of the missile launch platform 200 on the wind power nacelle 101 is done with the rails, here there are two nacelle rails 109 and two corresponding missile launch platform rails 209. This facilitates a construction where the load is distributed evenly over the nacelle and can be connected to suitable load-bearing points from the nacelle construction and handle the extra weight from the missile launch platform, possibly with reinforcement of the nacelle. ln order to facilitate easy assembly of the missile launch platform 200 on the wind power plant nacelle 101 from either helicopter §§§mor crane that can make the object sway, according to some aspects, the nacelle mounting means comprises a plurality of electromagnetic pads 103a, 103b, 103c, 103d, 103e that are adapted to attract corresponding ferromagnetic pads 204a, 204b, 204c, 204d, 204e according to the above. According to some further aspects, the missile platform rails 209, 210 comprise a plurality of ferromagnetic pads 204a, 204b, 204c, 204d that are adapted to be attracted by the electromagnetic pads 103a, 103b, 103c, 103d, where the platform mounting means 103 comprises the ferromagnetic pads 204a, 204b, 204c, 204d. A mounting procedure will be describe more in detail later.

Here, according to some aspects, each nacelle rail 109 comprises five electromagnetic pads recessed 103a-e in the nacelle rails 109, and each corresponding missile platform rails 209, 210 comprises five ferromagnetic pads 204a-e that are not recessed, in corresponding positions. Energizing the electromagnetic pads 103a-e will create attraction to the ferromagnetic pads 204a-e when these are sufficiently adjacent and work as a temporary fixation until permanent fixation nacelle rails 109, 110 with corresponding missile platform rails 209, 210 has been achieved.

A permanent fixation can for example be achieved by means of platform fastening apertures 223a-c which are provided in the corresponding rails 109, 110; 209, 210, and are adapted to receive retaining members 124a-c, for example in the form of screws or bolts.

An example of an alternative is shown in Figure 8a and Figure 8B where each missile platform rail 209, 210 is equipped with one or more locking hook members 213a-b, 214a-b which are adapted to engage the nacelle rails 109, These are only examples, and many other alternatives are of course possible, for example continuing using magnetic attraction.

With continued reference to Figure 4A and Figure 4B, the ferromagnetic pads 204a-e on the upper rail shall be of such height as to avoid disturbing levels of attraction between the upper rail, which also may be made of ferromagnetic material, and the electromagnetic pads 103a-e.

The horizontal spacing between the electromagnetic pads 103a-e and corresponding ferromagnetic pads 204a-e should not be same all along the rail as to avoid fixation in a non-intended, parallel displaced position. The electromagnetic pads could be remotely energized/de-energized by the assembly personnel standing on the nacelle 101 or a helicopter pilot.

The present disclosure also relates to a defense arrangement 100 comprising the wind power plant nacelle 101 described herein, which wind power plant nacelle 101 is mounted to a wind power plant tower 102, and the missile launch platform 200 described herein, which missile launch platform 200 is mounted to the wind power plant nacelle 101. The defense arrangement 100 is according to some aspects constituted by a wind power plant and the missile launch platform Furthermore, according to some aspects the turbine blades 105a, 105b, 105c are rotatable such that a blade rotation A3 is performed and according to some further aspects, the wind power plant nacelle 101 is rotatable such that a yaw rotation A4 is performed. The blade rotation A3 can be controlled by braking and/or stopping the rotation of the turbine blades 105a, 105b, 105c. The yaw rotation A4 can be controlled such that a certain azimuth position of the wind power plant nacelle 101 can be obtained. The yaw rotation A4 can for example be performed by turning the wind power plant nacelle 101 with respect to the wind power plant towerBy using a defense arrangement 100, such as for example a wind power plant, as a host for a missile launch platform 200 and associated technical systems, wind power installations become strategic assets to the defense, offering permanent installations, with elevated positions favorable for launch of missiles as response to, and interception of, threats.

The co-location of wind power and missile launch platform/system helps solving the conflict of interest and instead creates synergies both in function as well as in lowering the total cost for upholding the functions of military defense and electricity production. The total cost for upholding both functions is reduced by sharing the same establishment, physical constructions, communication, and utility systems.

According to some aspects, the defense arrangement 100 further comprises a control unit arrangement 120 and a radar system 130 that is adapted to provide radar target data to the control unit arrangement The control unit arrangement 120 may be arranged to communicate 410 with a cellular communication system 400. This communication system may, e.g., be a third generation partnership program (3GPP) defined access network like the fourth generation (4G) or the fifth generation (SG) access networks. The access network may provide access to remote networks and other resources such as, e.g., the lnternet 150. lt is also appreciated that some processing functions may be performed by resources in a remote network 420, such as a remote server 430. Thus, functions of the control unit 120 may be performed remotely on, e.g., the remote server According to some aspects, the control unit arrangement 120 is adapted to control firing of missiles in dependence of input data received from the radar system The elevated and advanced position of the radar system 130 will make early detection possible and give extra time for decision making or an early response. lf an incoming threat calls for response, the launch procedure can be initiated.

The co-arrangement with the radar 130 system saves cost and reduces weight of a redundant energy supply arrangement. Reduced weight is beneficial since it reducesthe need for reinforcement of the wind power plant nacelle 101 and the wind power plant tower The defense arrangement 100 further comprises an opaque housing 140 that is adapted to cover the missile launch platform 200, where the housing is removably attached to the wind power plant nacelle The opaque housing 140 serves several purposes. lt gives weather protection for e.g. the missile launch platform 200 and missile holding chamber 201 that may contain sensitive parts. The opaque housing 140 also hides the defense arrangement and if the housing is mounted on a plurality of wind power plant nacelles 101 in e.g. a large wind power farm, where not all wind power plant nacelles 101 are equipped with missile launch platforms 200, it will prevent an antagonist to know where the missile launch platforms are located and hence prevent from selectively disarm or destroy them. As mentioned above, all wind power plant nacelles 101 which are prepared for mounting of a missile launch platform 200 do not necessarily need to carry a missile launch platform Each opaque housing 140 is designed in an aerodynamic shape as to not disturb the wind flow more than necessary and to keep a high efficiency of the electricity production. To allow for quick use of missile launch platform 200, the opaque housing 140 must be able to be removed instantly. To accommodate this, according to some aspects, one or more of the following may be implemented.

- The side of the opaque housing 140 facing the front of the nacelle and the wind turbine blades 105 will always be subject to wind head on, provided that the nacelle is positioned parallel to the wind, in order to produce the most amount of electricity. ln normal operation, this is done automatically by means of controlling the yaw rotation A - The side of the opaque housing 140 facing the wind turbine blades 105 is equipped with a small explosive device 141 or similar, possibly of the same type as used in airbags.

- This explosive device 141 can be detonated 142 to raise the opaque housing, possibly also with some help of the wind, preferably the wind at least notcounteracting, such that the opaque housing 140 rotates 143 over hinges 160 (schematically indicated) in a back end of the opaque housing - The construction of the hinges 160 shall be designed such that the hinges 160 release or break at a suitable angle of rotation such that the opaque housing 140 is released and falls straight down to avoid the risk of an uncontrolled flying object.

According to some aspects, the housing is made of a light, strong and UV stable material as aluminum, a suitable polymer, possibly fiber reinforced, and/or one or more other suitable materials.

The hinges 160 are not necessary, but constitute an option for attachment/de- attachment of the opaque housing With reference to Figure 5, the present disclosure also relates to a defense system 300 comprising a plurality of defense arrangements 100 according to the above. Here, a plurality of wind power plants 100 are shown in a cluster that forms the defense system 300, and according to some aspects this cluster is positioned at sea, at a certain distance d from a shoreline 310. The defense arrangements 100 can of course be positioned on land as well. According to some aspects, the defense system also comprises at least one of said communication system 400, remote network 420, and remote server According to some aspects, an example of how defense arrangement 100 and the defense system 300 could operate will be described in the following.

The radar system 130 is normally continuously monitoring incoming objects and feeding information to the control unit arrangement 120. There can be one or more radar systems 130 in a defense system 300 and the radar systems does not need to be mounted on a wind power plant nacelle 101 that carries a missile launch platform 200, or even geographically close. For example, as shown in Figure 5, a radar system 130 can be placed at one location and communicate with one or more missile launch platforms at corresponding wind power plants 100 at a second location, remote from the first location. The radar system 130 is only schematically indicated in Figure 5 andcan be implanted in many ways. For example, radar system 130 can be comprised in a wind power plant nacelle of a wind power plant that either can be alone or comprised in a further cluster of two or more wind power plants. There can be several radar systems This arrangement can be advantageous for example if it is desired to keep the missile launch platform 200 within territorial waters e, where a state has full sovereignty, while using more geographically advanced areas as e.g. an exclusive economic zone f for the radar system 130. That would enable even earlier detection and interception, without breaking the widespread practice to not place fixed weapons outside the territorial waters e.

The control unit arrangement 120 can according to some aspects be adjacent or remote and be adapted to support a combination of automated decision and manual decisions.

The launch procedure starts with removal of the opaque housing 140 in order to clear the missile launch platform 200 from hindering objects. An operator takes a decision, based on information from the radar system 130 and the control unit arrangement 120 to initiate a missile launch towards an intended target. Based on information from the control unit arrangement 120, the rotatable base 212, the displacing means 211, the blade rotation A3, and the yaw rotation A4 are controlled and coordinated in order to position the nacelle 101, the missile holding chambers 201, the wind turbine blades 105 and other movable parts in a way that allows launch of the missiles 202 in the intended direction D, possibly without the missile exhaust flame 203 causing any damage to the wind power plant 100. lf parts of the nacelle 101 still may be affected by the missile exhaust flame 203 in certain positions, according to some aspects a fire fireproof cladding 119 with insulation between cladding and nacelle surface to protect the nacelle from heat, can be installed.

After launch, the radar system 130 keeps communication with the missile in order to guide it towards the target according to the normal protocol of the actual type of missile. At signal from the operator, the wind power plant 100 can be restored to a normal mode to resume its function to produce electricity.

With reference to Figure 9, the present disclosure also relates to a method for mounting a missile launch platform 200 to a wind power plant nacelle 101. The method comprises lowering S100 the missile launch platform 200 towards the wind power plant nacelle 101 and energizing S200 electromagnetic pads 103a, 103b, 103c, 103d comprised in nacelle mounting means 103 at the wind power plant nacelle 101 and used for attracting corresponding ferromagnetic pads 204a, 204b, 204c, 204d attached to the missile launch platform 200 such that the missile launch platform 200 is guided towards a desired position at the wind power plant nacelle 101. The method further comprises attaching S300 the missile launch platform 204 to the wind power plant nacelle using nacelle mounting means which co-operate with corresponding platform mounting means and establishing S400 connections 150, 151, 152 for power and communication between the wind power plant nacelle 101 and the missile launch platform 200 using corresponding nacelle interface means 106, 107, 108 and platform interface means 206, 207, This provides a secure and reliable mounting of a missile launch platform 200 to a wind power plant nacelle ln Figure 10 it is schematically illustrated, in terms of a number of functional units, the components of the control unit arrangement 120 according to embodiments of the discussions herein. Processing circuitry 125 is provided using any combination of one or more of a suitable central processing unit CPU, multiprocessor, microcontroller, digital signal processor DSP, etc., capable of executing software instructions stored in a computer program product, e.g. in the form of a storage medium 126. The processing circuitry 125 may further be provided as at least one application specific integrated circuit ASlC, or field programmable gate array FPGA. The processing circuitry thus comprises a plurality of digital logic components.

Particularly, the processing circuitry 125 is configured to cause the control unit arrangement 120 to perform a set of operations, or steps to control the operation of the wind power plant including, but not being limited to, controlling the missile launch platform 200. For example, the storage medium 126 may store the set of operations, and the processing circuitry 125 may be configured to retrieve the set of operationsfrom the storage medium 126 to cause the control unit arrangement 120 to perform the set of operations. The set of operations may be provided as a set of executable instructions. Thus, the processing circuitry 125 is thereby arranged to execute methods as herein disclosed.

The storage medium 126 may also comprise persistent storage, which, for example, can be any single one or combination of magnetic memory, optical memory, solid state memory or even remotely mounted memory.

According to some aspects, the control unit arrangement 120 further comprises an interface 127 for communications with at least one external device such as a control panel or an external device, for example the radar system 130, components of the missile launch platform 200 and components of the wind power plant nacelle 101. As such the interface 127 may comprise one or more transmitters and receivers, comprising analogue and digital components and a suitable number of ports for wireline communication. The interface 127 can be adapted for communication with other devices, such as a server, a personal computer or smartphone, the charging station, and/or other robotic working tools. Examples of such wireless communication devices are Bluetooth®, WiFi® (lEEE802.1 1 b), Global System l\/lobile (GSM) and LTE (Long Term Evolution), to name a few.

Figure 11 shows a computer program product 400 comprising computer executabie instructions 410 stored on media 420 to execute any of the methods disclosed herein.

A full integration of the software necessary to control the missile launch platform 200, the wind power plant nacelle 101 including the yaw rotation A4 and, if applicable, a wind turbine blade rotation A3, is advantageous. According to some aspects, in normal operation for energy generation, the civil personnel have only access to the civil parts of the installation to prevent misuse and/or accidents. ln case the missile launch platform 200 needs to be used, military authorized personnel can access the system and their control shall overrule any commands from civil personnel.

According to some aspects, with reference to Figure 12, instead of the rails previously described, the rotatable base 212 may be attached to a circular or oval platformmounting member 115 that is adapted to engage and rest on a circular or oval nacelle mounting member 215 that is adapted to be mounted to a wind power p|at nacelle (not shown). The mounting members 115, 215 provide the same advantages as the rails and can be equipped in a similar manner, for example with electromagnetic pads and ferromagnetic pads and other fastening means. ln case of a circular shape, the electromagnetic pads and ferromagnetic pads may be evenly distributed.

The mounting members 115, 215 can according to some aspects be regarded as rails, and therefore, generally, according to some aspects, the wind power plant nacelle 101 comprises at least one nacelle rail 109, 110; 115 that at least partly is adapted to support the missile launch platform 200, and the missile launch platform 200 comprises at least one missile platform rail 209, 210; 215 that at least partly is adapted to support the missile launch platform With reference to Figure 13, according to some aspects, in the following a method for identifying and intercepting a threat using a wind power plant 100 according to the above will be described. The method comprises T100 collecting and using data from a radar system 130 with a suitable combination of manual and automatic qualification of incoming information to judge threats and taking decision of, if and when to engage the missile launch platform 200 to handle the threat. The method further comprises T200 enabling military use access and command, which automatically shuts down normal operation and disables any command and access of the wind power plant 100 from civil personnel. The method also comprises removing T300 the opaque housing 140 as described in detail above. The method also includes, automatically calculating T400 how to control and maneuver the yaw rotation A4, the blade rotation A3, the displacing means 211 and the rotatable base 212 based on radar system data, such that the missile 202 can be launched at a correct position and azimuth angle oi without causing damage to the wind power plant nacelle 101. l\/loreover, the method includes T500 launching one or more missiles 202 by remote control.

According to some further aspects, the method may also include using T600 information updates from the radar system 130 to control the trajectory of launched missiles 202 to ensure that they intercept the intended target or targets. Further, themethod comprises using T700 the radar system 130 data to determine the outcome of the launch/launches and to determine if other defense means should be engaged.

According to some aspects, the method further includes disabling T800 military use access and command when the military operation is finalized, such that civil personnel are enabled to control the wind power plant 100 again. The wind power plant 100 is then restored to a normal mode to resume its function to produce electricity.

This provides a secure method to separate military and civil use of the defense arrangement The present disclosure is not limited to the examples provided above, but may vary within the scope of the appended claims. For example, with reference to Figure 4A, Figure 4B, Figure 8A and Figure 8B, the nacelle mounting means comprises at least one of - the nacelle rails 109, 110, and - nacelle fastening apertures 123a-c and the platform mounting means comprises at least one of - locking hook members 213a-b, 214a-b; and - platform fastening apertures 223a-c; where the locking hook members 213a-b, 214a-b; are adapted to engage the nacelle rails109, 110, and where the fastening apertures 123a-c; 223a-c are provided in the corresponding rails 109, 110; 209, 210 and are adapted to receive retaining members 124a-c.

Claims (15)

1. A wind power plant nacelle (101) adapted to be mounted to a wind power plant tower (102), characterized in that the wind power plant nacelle (101) comprises nacelle mounting means (103a-e; 123a-c; 109, 110) adapted to co-operate with corresponding platform mounting means (204a-e; 223a-c 213a-b, 214a-b), comprised in a missile launch platform (200), enabling a missile launch platform (200) to be mounted to the wind power plant nacelle (101), where the wind power plant nacelle (101) comprises at least one nacelle interface means (106, 107, 108) adapted to provide transfer of at least one of communication and power between the wind power plant nacelle (101) and a missile launch platform (200) via corresponding connections (150,151,152)

2. The wind power plant nacelle (101) according to claim 1, wherein the nacelle interface means comprises an interface (107, 108) for transfer of at least one of electrical power, pneumatic power and hydraulic power via at least one corresponding connection (151, 152).

3. The wind power plant nacelle (101) according to any one of the claims 1 or 2, further comprising at least one nacelle rail (109, 110; 115) that at least partly is adapted to support a missile launch platform (200).

4. The wind power plant nacelle (101) according to any one of the previous claims, wherein the nacelle mounting means (103) comprise a plurality of electromagnetic pads (103a, 103b, 103c, 103d, 103e) that are adapted to attract corresponding ferromagnetic pads (204a, 204b, 204c, 204d, 204e) attached to a missile launch platform (200).

5. A missile launch platform (200) comprising a plurality of missile holding chambers (201) and platform mounting means (204a-e; 223a-c 213a-b, 214a-b), characterized in that the platform mounting means (204a-e; 223a-c 213a-b, 214a-b) are adapted to co-operate with corresponding nacelle mounting means (103a-e; 123a- c;109, 110), enabling the missile launch platform (200) to be mounted to a wind power plant nacelle (101) according to any one of the claims 1-4, where the missile launch platform (200) comprises at least one platform interface means (206, 207, 208) adapted to provide transfer of at least one of communication and power between the missile launch platform (200) and a wind power plant nacelle (101) according to any one of the claims 1-4 via corresponding connections (150, 151, 152).

6. The missile launch platform (200) according to claim 5, wherein the platform interface means comprises an interface (207, 208) for transfer of at least one of electrical power, pneumatic power and hydraulic power via at least one corresponding connection (151, 152).

7. The missile launch platform (200) according to any one of the claims 5 or 6, further comprising at least one missile platform rail (209, 210; 215) that at least partly are adapted to support the missile launch platform (200), and which comprise a plurality of ferromagnetic pads (204a, 204b, 204c, 204d) that are adapted to be attracted by electromagnetic pads (103a, 103b, 103c, 103d), the platform mounting means (103) comprising the ferromagnetic pads (204a, 204b, 204c, 204d).

8. The missile launch platform (200) according to any one of the claims 5-7, further comprising a rotatable base (212) and displacing means (211) adapted to raise the missile holding chambers (201) at an angle (d) to the rotatable base (212).

9. A defense arrangement (100) comprising a wind power plant nacelle (101) according to any one of the claims 1-4 that is mounted to a wind power plant tower (102), and a missile launch platform (200) according to any one of the claims 5- 8 that is mounted to the wind power plant nacelle (101).

10. The defense arrangement (100) according to claim 333, further comprising a control unit arrangement (120) and a radar system (130) that is adapted to provide radar target data to the control unit arrangement (130).

11. The defense arrangement (100) according to claim 10, wherein the control unit arrangement (120) is adapted to control firing of missiles in dependence of input data received from the radar system (130).

12. The defense arrangement (100) according to any one of the claims fëïjiï-1 1, further comprising an opaque housing (140) that is adapted to cover the missile launch platform (200), where the housing is removably attached to the wind power plant nacelle (101).

13. The defense arrangement (100) according to any one of the claims åsš-12, wherein the nacelle mounting means comprises f l-l-le-nacelle rails (109, 110), and the elalferllfi meuntëne mean-e cemerlses leeltllltl heek inernleers líšëfše-ile. íšël-fílefel i-if* rlfirvmllc* lïfmfllm-wírwfe famfuflrnvfl* - “Pl r\\ n 5.15. vßJ!| S \,J|.\ß| li :M \ø\su'\4l KJ NJ \ I Qflwi of, linking lïfwšr' menfiëers (iïläi: El-'šzz ls); andfof' the necešle lneurltšne lllealfis eernprlses llacelše faslenlllo apertures ílššiše--cl alle the elalform lltolllrltšne som 'lrlses platform fastening apertures (223a-c); where the locking hook members (213a-b, 214a-b); are adapted to engage the nacelle rails (109, 110), and where fastening apertures (123a-c}__gggçg__ggggyl_gigggi__lg_ neeelle l “E 10%; and the eletlorm laslerllsle aeertures i223a-c) are provided in lleecorresponding "z ff P, "ll “ lllšsslše lclz-llftz-rltl rzrlšls 51209, 210) and are adapted to i receive retaining members (124a-c).

14. A defense system (300) comprising a plurality of defense arrangements (100) according to any one of the claims 9-

15. A method for mounting a missile launch platform (200) to a wind power plant nacelle (101), the method comprising: lowering (S100) the missile launch platform (200) towards the wind power plant nacelle (101); energizing (S200) electromagnetic pads (103a, 103b, 103c, 103d) comprised in nacelle mounting means (103) at the wind power plant nacelle (101) and used for attracting corresponding ferromagnetic pads (204a, 204b, 204c, 204d) attached to the missile launch platform (200) such that the missile launch platform (200) is guided towards a desired position at the wind power plant nacelle (101 ); attaching (S300) the missile launch platform (204) to the wind power plant nacelle using nacelle mounting means which co-operate with corresponding platform mounting means; (S400) connections (150, 151, 152) communication between the wind power plant nacelle (101) and the missile launch establishing for power and platform (200) using corresponding nacelle interface means (106, 107, 108) and platform interface means (206, 207, 208).