Tower and associated method of protecting tower from wind-induced vibrations

By installing a movable mass device on the tower and using sensor detection and a control unit to control the inertial movement of the mass block in real time, the stability problem of the tower under wind-induced vibration is solved and effective offset of wind-induced vibration is achieved.

CN120677292APending Publication Date: 2025-09-19ESSEC LTD
View PDF 3 Cites 0 Cited by

Patent Information

Application Number
CN202380091617.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2023-01-16
Filing Date
2023-12-13
Publication Date
2025-09-19

AI Technical Summary

Technical Problem

It is difficult to effectively protect towers, especially towers with truss support structures, from wind-induced vibrations in existing technologies.

Method used

The tower design incorporates a movable mass device consisting of a chassis mechanically connected to multiple interconnected beams, a linearly movable mass, and an actuator to control the mass's movement. Sensors detect vibrations, and a control unit controls the mass's inertial movement in real time to counteract wind-induced vibrations.

Benefits of technology

It effectively reduces the vibration of the tower, especially the wind-induced vibration, and improves the stability and safety of the tower.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN120677292A_ABST
    Figure CN120677292A_ABST
Patent Text Reader

Abstract

The tower comprises a truss support structure (101). The truss support structure (101) is elongated and upright and includes a plurality of interconnected beams (102). The tower comprises at least one movable mass device (103), the movable mass device (103) comprising: a chassis (301) mechanically connected to a plurality of interconnected beams (102); at least one mass (302) configured to move in at least one linear direction; at least one actuator (303) configured to move the at least one mass (302) in a controlled manner. The tower further comprises at least one sensor (104) configured to detect vibrations of the truss support structure (101), at least one control unit (105) operably connected to the at least one sensor (104) and to the at least one actuator (303), configured to control inertial movement of the at least one mass (302) in real time to counteract the truss support structure (101) and at least one control unit (105) for controlling the vibrations. Related method for protecting a tower (100) from wind-induced vibrations.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The invention relates to a tower comprising at least one movable mass arrangement for protecting the tower from wind-induced vibrations.

[0002] The present invention relates to a method of protecting a tower from wind-induced vibrations.

[0003] The field of application of the invention is the reduction of the effects of wind loads on towers, in particular towers having a steel truss structure, such as broadcast towers and telecommunication towers. Background Art

[0004] Tower structures such as transmission towers and communication towers often use steel truss structures.

[0005] These towers have a slender, upright structure, making them very slim and virtually undamped.

[0006] Therefore, towers are particularly susceptible to vibrations caused by wind loads. These wind-induced vibrations can lead to longitudinal, lateral or torsional movements of the tower, or even aeroelastic instability of the structure.

[0007] The vibration problem is exacerbated if heavy equipment, such as broadcast or telecommunications equipment, is located on the tower, particularly at the top of the tower.

[0008] This problem is exacerbated in the case of towers having a truss support structure comprising a plurality of interconnected beams.

[0009] In these cases, the dynamic characteristics of the truss tower are amplified by the low damping of the truss support structure. Wind loads can cause high displacements and stresses in the support structure, potentially causing damage or even collapse of the tower itself.

[0010] It is known to use tuned mass passive dampers to mechanically increase the damping of a structure, thereby reducing the negative effects of wind loads on the tower. However, these systems are particularly sensitive to changes in the structure over time and their weight is typically around 5% of the total mass of the structure. This also means that specialized designs are required for different structures.

[0011] Document US20100226785A1 relates to a tower with a space frame structure for a wind turbine, wherein the tower comprises damping struts in the longitudinal elements of the space frame to suppress vibrations caused by non-periodic gusts or high wind speeds.

[0012] Document US Pat. No. 5,065,552 A relates to an active vibration response control system for a frame structure having columns and beams, wherein variable damping devices are placed between the elements of the frame and are controlled in the event of strong winds.

[0013] Document CN114253308A relates to an active control method for vibration of a space frame structure, wherein information about the acceleration of the structure is obtained by an acceleration sensor, and a piezoelectric actuator placed on the structure and configured to apply a driving force is controlled according to a neural network prediction model.

[0014] However, known solutions are not completely effective in protecting towers, in particular towers having a truss support structure or a space frame, from wind-induced vibrations. Summary of the Invention

[0015] The object of the present invention is to overcome some of the disadvantages of the prior art.

[0016] A specific object of the present invention is to provide a tower which is effectively protected against vibrations.

[0017] Another specific object of the invention is to protect the tower from wind-induced vibrations.

[0018] Another specific object of the present invention is to counteract vibrations of a truss support structure comprising a plurality of interconnected beams.

[0019] These and other objects are achieved by a tower and a method for protecting a tower from wind-induced vibrations according to the features of the appended claims, which form an integral part of the present description.

[0020] A basic concept of the present invention is to provide a tower comprising an elongated, upright truss support structure having a plurality of interconnected beams. The tower includes at least one movable mass device, comprising: a chassis mechanically connected to the plurality of interconnected beams; at least one mass configured to move in at least one linear direction; and at least one actuator configured to move the at least one mass in a controlled manner. The tower also includes at least one sensor configured to detect vibrations of the truss support structure. The tower also includes at least one control unit operatively connected to the at least one sensor and the at least one actuator. The at least one control unit is configured to control the inertial movement of the at least one mass in real time to counteract vibrations of the truss support structure.

[0021] Another fundamental concept of the present invention is to provide a method for protecting a tower from wind-induced vibrations. The tower comprises an elongated, upright truss support structure having a plurality of interconnected beams. The method includes providing the tower with at least one movable mass device. The movable mass device comprises a chassis mechanically connected to the plurality of interconnected beams, at least one mass movable in at least one linear direction, and at least one actuator for moving the at least one mass in a controlled manner. The method includes detecting wind-induced vibrations on the truss support structure using at least one sensor. The method also includes controlling the inertial movement of the at least one mass in real time to counteract the wind-induced vibrations.

[0022] Another basic concept of the present invention is to provide a tower comprising an elongated, upright support structure, the tower further comprising at least one movable mass device. The at least one movable mass device comprises a chassis mechanically connected to the support structure, at least one mass configured to move in at least one linear direction, and at least one actuator configured to move the at least one mass in a controlled manner. The tower further comprises at least one sensor configured to detect vibrations of the support structure, and at least one control unit operatively connected to the at least one sensor and to the at least one actuator. The at least one control unit is configured to control the inertial movement of the at least one mass in real time to counteract the vibrations of the support structure.

[0023] Another fundamental concept of the present invention is to provide a method for protecting a tower from wind-induced vibrations. The tower comprises an elongated, upright support structure. The method includes providing the tower with at least one movable mass device, the movable mass device comprising: a chassis mechanically connected to the support structure, at least one mass movable in at least one linear direction, and at least one actuator for moving the at least one mass in a controlled manner; detecting wind-induced vibrations on the support structure via at least one sensor; and controlling the inertial movement of the at least one mass in real time to counteract the wind-induced vibrations.

[0024] The invention allows to effectively protect the tower from vibrations, in particular wind-induced vibrations.

[0025] The invention allows in particular to effectively counteract vibrations of a truss support structure comprising a plurality of interconnected beams.

[0026] Advantageously, the movable mass arrangement according to the invention constitutes an active mass damper, particularly suitable for application in truss support structures with interconnected beams, such as steel truss towers.

[0027] A tower protection system comprising at least one movable mass device, at least one sensor and at least one control unit is configured to generate a stabilizing force on the tower structure, thereby generating a damping effect on the dynamic characteristics of the structure itself to reduce the maximum displacement of the tower due to wind-induced loads.

[0028] At least one control unit, such as a central computer, advantageously allows remote or automatic updating of the active control algorithm of the at least one movable mass device in order to adapt the system to every potential change in the tower structure.

[0029] Advantageously, the invention is applicable to a very wide range of towers (eg towers having a truss support structure with interconnecting beams) without requiring substantial changes to the movable mass arrangement, which can therefore represent a widely used modular unit.

[0030] Advantageously, the mass of the at least one movable mass device is significantly reduced relative to the total mass of the tower structure.Furthermore, the mass of the at least one sensor and the at least one control unit is substantially negligible relative to the total mass of the tower structure.

[0031] Advantageously, since the configuration of one or more movable mass devices associated with a tower can be changed in a modular manner, a specific solution does not need to be designed for each tower, but rather works within the algorithm of the control unit.

[0032] Advantageously, the present invention is particularly effective at protecting towers over a wide frequency range (typically between 0.5-10.0 Hz); in this respect, the invention is effective over a wider range than a single specific design frequency.

[0033] Furthermore, advantageously, by precisely controlling the movement of at least one mass moved by at least one actuator, it is possible to effectively act simultaneously on all frequencies characteristic of the structure, for example in the range of 0.5-10.0 Hz.

[0034] Preferably, at least one linear direction for movement of the at least one mass is at least partially transverse to a deployment axis of the truss support structure. Advantageously, the arrangement of the movable mass means is particularly effective for counteracting vibrations of the tower structure, in particular wind-induced vibrations.

[0035] Preferably, the tower comprises two linearly movable masses, or a single mass movable in two independent directions. Preferably, the movement of at least one movable mass is controlled in two linear directions in respective planes perpendicular to one another. Advantageously, this configuration allows for the cancellation of vibrations of the tower structure along two axes, in particular vibrations caused by wind that may originate from multiple different spatial directions.

[0036] Further features and advantages will become apparent from the following detailed description of a preferred non-limiting embodiment of the invention, as well as from the dependent claims outlining preferred and particularly advantageous embodiments of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The invention is described below with reference to the accompanying drawings, given by way of non-limiting examples, in which:

[0038] Figure 1 An example of a tower with a truss support structure is shown.

[0039] Figure 2 An example of a tower for preventing wind-induced vibrations according to the present invention is shown.

[0040] Figure 3 Graphs illustrating the operation of the present invention are shown.

[0041] Figure 4 Another example of a tower for preventing wind-induced vibration according to the present invention is shown.

[0042] Figure 5 Another example of a tower for preventing wind-induced vibration according to the present invention is shown.

[0043] Figure 6 Another example of a tower for preventing wind-induced vibration according to the present invention is shown.

[0044] Figure 7 Another example of a tower for preventing wind-induced vibration according to the present invention is shown.

[0045] Figure 8 Detail of a tower according to a first embodiment of the invention with a movable mass arrangement is shown.

[0046] Figure 9 Detail of a tower according to a second embodiment of the invention with a movable mass arrangement is shown.

[0047] Figure 10 A detail of a tower according to a third embodiment of the invention with a movable mass arrangement is shown.

[0048] Figure 11 Detail of a tower according to a fourth embodiment of the invention with a movable mass arrangement is shown.

[0049] Figure 12 Detail of a tower according to a fifth embodiment of the invention with a movable mass arrangement is shown.

[0050] Figure 13 Another example of a tower without a truss structure that is protected from wind-induced vibrations according to the present invention is shown.

[0051] In each figure, similar elements will be identified by similar reference numerals. If multiple elements are present in the same figure, for simplicity, sometimes only one or some of them will be represented by a reference numeral, which means that the other elements are also included in the description. DETAILED DESCRIPTION

[0052] Figure 1 An example of a tower with a truss support structure is shown.

[0053] Typically, a tower has an elongated, upright support structure. The truss support structure of a tower comprises a plurality of interconnected beams.

[0054] Towers with a truss support structure, usually made of steel beams, are commonly used in telecommunications and broadcasting; for this purpose, towers often mount antennas, parabolic antennas, satellite dishes, etc.

[0055] Towers with slender, upright support structures are subject to issues related to wind-induced loads. Dynamic loads are caused by the interaction of turbulent wind or wind currents with specific areas of the structure. High dynamic loads can loosen bolted connections or weaken beam elements in fatigue mechanisms, particularly in towers with truss support structures. Furthermore, high dynamic loads can exceed the strength limits of the building materials or cause equilibrium instability in the interconnected beams that make up the truss support structure.

[0056] Figure 2 An example of a tower 100 that prevents wind-induced vibrations is shown.

[0057] The tower 100 comprises an elongated and upright truss support structure 101. The truss support structure 101 comprises a plurality of interconnected beams 102.

[0058] Typically, the tower 100 is subjected to wind induced loads 10. The tower 100 comprises a system for reducing vibrations / oscillations according to the present invention.

[0059] The tower 100 comprises a movable mass arrangement 103 ; in the alternative, the tower may comprise two or more movable mass arrangements 103 .

[0060] Typically, the movable mass device 103 comprises a chassis that is mechanically connected to a plurality of interconnected beams 102. By "mechanically connected" is meant mechanically connected to one or more interconnected beams comprising the truss support structure 101 in a direct or indirect manner.

[0061] Typically, the movable mass arrangement 103 comprises at least one mass configured to move in at least one linear direction. Typically, the movable mass arrangement 103 comprises at least one actuator configured to move the at least one mass in a controlled manner.

[0062] The tower 100 further comprises at least one sensor 104 configured to detect vibrations 20 of the truss support structure 101. For example, the sensor 104 is an accelerometer.

[0063] The tower 100 further comprises at least one control unit 105 (here represented by, for example, a computer) operatively connected to at least one sensor 104 and at least one actuator of the movable mass device 103 , as indicated by dashed arrows.

[0064] The at least one control unit 105 is configured to control the inertial movement of at least one mass of the movable mass device 103 in real time to counteract the vibration 20 of the truss support structure 101 .

[0065] Preferably, the at least one control unit 105 is further configured to receive information about the ongoing vibration 20 in real time and calculate the inertial movement of the mass of the movable mass device 103 according to a control algorithm.

[0066] Preferably, the linear direction of movement of at least one mass block for the movable mass device 103 is at least partially transverse to the deployment axis of the truss support structure 101, which deployment axis is a longitudinal axis, as shown by the right / left arrows in the example of the movable mass device 103 transverse to the vertical deployment axis of the tower 100.

[0067] Preferably, the tower 100 is of the type having at least one telecommunication device 106 on top of a truss support structure 101 .

[0068] Figure 3 Graphs illustrating the operation of the present invention are shown.

[0069] Wind 10 strikes the truss support structure 101 of tower 100 , causing aerodynamic effects 101A around structure 101 , and dynamic effects 101B within structure 101 itself.

[0070] Thus, the wind 10 generates loads 11 , which involve vibrations 20 of the tower 100 .

[0071] The movable mass arrangement 103 is configured to generate active control forces 31 of the inertial type.

[0072] The at least one control unit 105 is configured to calculate the inertial movement of the mass of the movable mass arrangement 103 according to the control algorithm 32 .

[0073] At least one sensor 104 is configured for detection 33 of vibrations 20 , which is provided as input to a control algorithm 32 to at least one control unit 105 for determining active control forces 31 in real time.

[0074] Furthermore, the system preferably provides a remote connection 201 via which remote maintenance 34 can be performed.

[0075] Furthermore, the system preferably provides a cloud infrastructure 202 that allows data post-processing 35 to be performed.

[0076] Through data post-processing 35 , the certification module 203 is preferably adapted for structural health monitoring 36 of the tower 100 .

[0077] In the example, the vibratory movements 20 of the structure 101 are measured by one or more accelerometers 104, the data being processed in at least one control unit 105 by an active control algorithm 32; given the measured acceleration 33, the at least one control unit 105 calculates and controls the reference position of the active mass present in the inertial actuator in order to generate a force 31 that stabilizes the structure 101 and produces a damping effect on the dynamic characteristics of the tower 100.

[0078] Figure 4 Another example of a tower 100 is shown, comprising two movable mass devices 103, whose masses are configured to move in two linear directions, respectively, on respective planes perpendicular to each other, as indicated by the arrows associated with these elements.

[0079] Furthermore, the tower 100 comprises two sensors 104 , in particular accelerometers, preferably each having a sensing axis aligned with a respective linear direction of a respective one of the two masses of the two movable mass means 103 .

[0080] Other sensors can be embedded in the system, such as anemometers, temperature sensors, etc.

[0081] As a variation of the two movable mass devices 103 (not shown), a single movable mass device may include a mass configured to move simultaneously in two mutually perpendicular linear directions in a single plane. Preferably, in this alternative, the single movable mass device also includes two actuators, one for movement in each of the two linear directions; in other words, the two actuators act on the single mass of the movable mass device through dual-axis control.

[0082] Figure 5 Another example of a tower 100 is shown, wherein a plurality of sensors 103 , in particular four sensors 104 , are applied to a truss support structure 101 .

[0083] Preferably, the sensors 104 are positioned at different heights along the extension of the truss support structure 101 .

[0084] Figure 6 and Figure 7 A further example of a tower 100 for preventing wind-induced vibrations according to a further embodiment is shown.

[0085] In these examples, there are four sensors 104, two each applied to the truss support structure 101 and two each applied to the base of the truss support structure 101, thus positioned at different heights.

[0086] exist Figure 6 In the example of , there is a single movable mass device 103, and Figure 7The example of the present invention has two movable mass devices 103, which is different from the above Figure 4 and Figure 5 The example is similar to .

[0087] The masses of the two movable mass devices 103 are configured to move respectively in two linear directions on respective planes that are perpendicular to each other, as indicated by the arrows associated with these elements.

[0088] Figure 8 A detail of a tower 100 with a first embodiment of a movable mass arrangement 103 is shown.

[0089] Generally, the movable mass device 103 comprises a chassis 301 mechanically connected to a plurality of interconnected beams, with the chassis 301 being mechanically connected overall to the truss support structure 101 .

[0090] Typically, the movable mass device 103 includes at least one mass block 302 , which is configured to move in at least one linear direction, as indicated by arrows in the figure. The at least one mass block 302 is movably supported by a chassis 301 .

[0091] Typically, the movable mass arrangement 103 comprises at least one actuator 303 (illustrated in a simplified manner in the figure); the actuator 303 is configured to move at least one mass 302 in a controlled manner.

[0092] The actuator 303 that converts the energy provided by the power supply into the kinetic energy of the inertial mass 302 can be embedded in the chassis 301, for example, using a rotary motor that drives a ball screw transmission.

[0093] Alternatively, the actuator 303 may be embedded in the mass 302 itself, for example using a rotary drive and a rack and pinion arrangement.

[0094] However, another option is to use the interaction between elements placed on the chassis 301 and the linear mass 302 to generate the mechanical power required to move the mass 302, as occurs, for example, in a linear motor. Therefore, the actuator 303 can therefore include a plurality of elements with a uniformly dispersed configuration within the movable mass device 103.

[0095] In this example, the chassis 301 comprises a plate base that rests on a horizontal platform of the tower 100 .

[0096] Typically, the movable mass device 103 may include a protective cover at least partially covering the movable mass 302 , which is not shown in these examples to simplify the illustration.

[0097] Figure 9 A detail of a tower 100 with a second embodiment of a movable mass arrangement 103 is shown.

[0098] As already described, the movable mass device 103 comprises a chassis 301 , at least one mass 302 and at least one actuator 303 .

[0099] In this example, chassis 301 includes a plate base flipped on its side and vertically anchored to a plurality of interconnected beams, the plate base being integrally mechanically connected to chassis 301 as a flipped and vertical truss support structure.

[0100] The chassis 301 may be anchored to a horizontal beam, or to an upright or inclined structural member.

[0101] The advantage of the second embodiment of the movable mass device 103 is to free up some space on possible horizontal platforms of the tower 100 or to allow installation on a tower 100 of reduced dimensions and without, for example, any available horizontal platforms.

[0102] Figure 10 Detail of a tower 100 of a third embodiment with a movable mass arrangement 103 is shown, and Figure 11 A detail of a tower 100 with a fourth embodiment of a movable mass arrangement 103 is shown.

[0103] In both examples, there are two movable mass devices 103, which are similar to the above-mentioned Figure 4 、 Figure 5 and Figure 7 .

[0104] As indicated by the arrows associated with these elements, the masses 302 of the two movable mass devices 103 are configured to move in two linear directions, respectively, on respective planes perpendicular to each other. These two linear directions can be understood as Cartesian directions X and Y, so as to effectively cancel the vibration movement of the tower 100 in space that can be resolved into directions X and Y.

[0105] Two respective chassis 301 are also shown, while for simplicity the actuators are not shown, but are present in the movement of the respective masses 302 in a controlled manner.

[0106] Figure 12 A detail of a tower 100 with a fifth embodiment of a movable mass arrangement 103 is shown.

[0107] In this example, there are two movable mass devices 103, similar to the above Figure 4 、 Figure 5 、 Figure 7 、 Figure 10 and Figure 11 .

[0108] As indicated by the arrows associated with these elements, the masses 302 of the two movable mass devices 103 are configured to move respectively along two linear directions on respective planes that are perpendicular to each other.

[0109] Furthermore, each chassis 301 includes a respective plate base that is flipped on one side and vertically anchored to a plurality of interconnected beams, the plate base being mechanically connected to the chassis 301 configured as a flipped and vertical truss support structure 101 .

[0110] It is therefore apparent that one or more movable mass devices 103 are associated with the tower 100 , allowing for multiple configurations to be selected during the design phase, for example taking into account the average wind stress, the inertial mass of each movable mass, the number of movable mass devices and the structural configuration of the tower 100 .

[0111] Generally, the present invention provides a method for protecting a tower 100 from wind-induced vibrations. The tower 100 includes an elongated, upright truss support structure 101 having a plurality of interconnected beams 102.

[0112] Thus, the present invention represents a method for increasing the dynamic damping of a tower 100 that is particularly susceptible to wind-induced vibrations.

[0113] The tower 100 is provided with at least one movable mass device 103, which comprises: a chassis 301 mechanically connected to a plurality of interconnected beams 102, at least one mass block 302 that moves in at least one linear direction, and at least one actuator 303 that moves the at least one mass block 302 in a controlled manner.

[0114] Detection of wind-induced vibrations on the truss support structure 101 by means of at least one sensor 104 is provided.

[0115] Real-time control of the inertial movement of the at least one mass 302 is provided to counteract wind-induced vibrations.

[0116] Generally, the method for protecting a tower 100 from wind-induced vibrations is adapted to provide a tower 100 as described above. In other words, the features described in connection with the tower 100 are applied by a corresponding method for protecting a tower according to the present invention.

[0117] exist Figure 13 In another alternative shown, a tower 100 ′ may include an elongated and upright support structure 401 and at least one movable mass device 103 .

[0118] The movable mass device 103 comprises: a chassis 301 mechanically connected to a support structure 401; at least one mass 302 configured to move in at least one linear direction; and at least one actuator 303 configured to move the at least one mass 302 in a controlled manner.

[0119] The tower 100' further comprises at least one sensor 104 configured to detect vibrations of the support structure.

[0120] The tower 100' further comprises at least one control unit 105 operatively connected to the at least one sensor 104 and the at least one actuator 303. The at least one control unit 105 is configured to control the inertial movement of the at least one mass 302 in real time to counteract vibrations of the support structure 401.

[0121] In other words, in this further alternative, the tower 100 ′ comprises a generally elongated and upright support structure 401 , which however is not necessarily a truss support structure 101 .

[0122] In this respect, the general elongated and upright support structure 401 of the tower 100 ′ does not necessarily comprise a plurality of interconnected beams, but it may comprise different tower structural elements, such as one or more pylons made of steel or reinforced concrete.

[0123] In this further alternative, the method for protecting a tower from wind-induced vibrations provides for providing a tower 100 ′ with at least one movable mass device 103 , the chassis 301 of which is mechanically connected to a support structure 401 .

[0124] In this case, the at least one movable mass arrangement 103 is also similar to that described above with reference to the truss support structure.

[0125] Industrial Applicability

[0126] Advantageously, the invention allows protecting the tower from vibrations, in particular wind-induced vibrations.

[0127] The invention is particularly effective in towers having a slender and upright support structure, in particular a steel truss support structure having a natural frequency between 0.5 Hz and 10.0 Hz.

[0128] Generally speaking, the present invention is particularly effective in low damping structures, ie, with a damping equal to or below 1% on the first vibration mode.

[0129] In view of the description set forth herein, a person skilled in the art will be able to devise further modifications and alternatives to meet contingent and specific requirements.

[0130] Obviously, the configuration of specific elements described with reference to certain embodiments can be used in other embodiments described herein without technical incompatibilities apparent to those skilled in the art.

[0131] For example, the specific construction of the at least one movable mass device may be configured according to specific requirements and design criteria.

[0132] Therefore, the embodiments described herein are to be understood as illustrative and non-limiting examples of the present invention.

Claims

1. A tower comprising a truss support structure (101) which is elongated and upright and comprises a plurality of interconnected beams (102), in, The tower comprises at least one movable mass device (103), the at least one movable mass device (103) comprising: a chassis (301) mechanically connected to the plurality of interconnected beams (102), at least one mass (302) configured to move in at least one linear direction, at least one actuator (303) configured to move the at least one mass (302) in a controlled manner; Wherein, the tower further comprises: at least one sensor (104) configured to detect vibrations of the truss support structure (101), At least one control unit (105) is operably connected to the at least one sensor (104) and the at least one actuator (303), and the at least one control unit (105) is configured to control the inertial movement of the at least one mass block (302) in real time to offset the vibration of the truss support structure (101).

2. The tower according to claim 1, wherein: The at least one linear direction for movement of the at least one mass (302) is at least partially transverse to a deployment axis of the truss support structure (101).

3. The tower according to claim 1 or 2, wherein: The tower comprises two movable mass devices (103), wherein the two mass blocks (302) are configured to move respectively along two linear directions on corresponding planes perpendicular to each other.

4. The tower according to claim 1 or 2, wherein: The movable mass device (103) includes a mass block configured to move simultaneously in two linear directions, the two linear directions being perpendicular to each other in a unique plane, and the movable mass device (103) also includes two actuators, one for each of the two linear directions, the actuators being configured for dual-axis control.

5. The tower according to any one of claims 1 to 4, wherein: The chassis (301) comprises a plate base resting on a horizontal platform of the tower.

6. The tower according to any one of claims 1 to 3, wherein: The chassis (301) comprises a plate base turned on one side and vertically anchored to the plurality of interconnected beams (102).

7. The tower according to any one of claims 1 to 6, wherein: The at least one sensor (104) comprises a plurality of sensors preferably applied to the truss support structure (101) at different heights along the extension of the truss support structure (101).

8. The tower according to any one of claims 1 to 7, wherein: The at least one sensor (104) comprises at least one accelerometer preferably having at least one sensing axis aligned with the at least one linear direction.

9. The tower according to any one of claims 1 to 8, wherein: The at least one control unit (105) is further configured to receive information about the vibration in real time and calculate the inertial movement according to a control algorithm.

10. The tower according to any one of claims 1 to 9, comprising at least one telecommunication device (106) on the truss support structure (101).

11. A method for protecting a tower (100) from wind-induced vibrations, wherein: The tower (100) comprises an elongated, upright truss support structure (101) having a plurality of interconnected beams (102), the method comprising: Providing the tower (100) with at least one movable mass device (103), the movable mass device (103) comprising: a chassis (301) mechanically connected to the plurality of interconnected beams (102), at least one mass (302) movable in at least one linear direction, and at least one actuator (303) for moving the at least one mass (302) in a controlled manner; detecting vibrations (20) caused by wind (10) on the truss support structure (101) by at least one sensor (104), The inertial movement of the at least one mass (302) is controlled in real time to counteract the wind-induced vibration (20).

12. A method for protecting a tower from wind-induced vibrations according to claim 11, adapted to provide a tower according to any one of claims 1 to 10.

13. A tower (100'), comprising an elongated and upright support structure (401), and at least one movable mass device (103), the at least one movable mass device (103) comprising: a chassis (301), said chassis (301) being mechanically connected to said support structure (401), at least one mass (302) configured to move in at least one linear direction, at least one actuator (303) configured to move the at least one mass (302) in a controlled manner; Wherein, the tower (100') further comprises: at least one sensor (104) configured to detect vibrations of the support structure (401), At least one control unit (105) is operably connected to the at least one sensor (104) and to the at least one actuator (303), the at least one controller (105) being configured to control the inertial movement of the mass (302) in real time to counteract the vibration of the support structure (401).

14. A method for protecting a tower (100') from wind-induced vibrations, wherein: The tower (100') comprises an elongated and upright support structure (401), and the method comprises: Providing the tower (100') with at least one movable mass device (103), the movable mass device (103) comprising: a chassis (301) mechanically connected to the support structure (401), at least one mass (302) movable in at least one linear direction, and at least one actuator (303) for moving the at least one mass (302) in a controlled manner; detecting vibrations (20) caused by wind (10) on the support structure (401) by at least one sensor (104); The inertial movement of the at least one mass (302) is controlled in real time to counteract wind-induced vibrations (20).

Citation Information

Patent Citations

  • Active control method and device for vibration of space frame structure

    CN114253308A

  • Structural tower

    US20100226785A1

  • Active seismic response control system for use in structure

    US5065552A