ACTIVE CONTROL SYSTEM FOR SUPPRESSING SWING AND SWAY BEHAVIORS OF ENGINEERING STRUCTURES OR MECHANICAL SYSTEMS

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of International Patent Application No. PCT/CN2023/083738, filed on Mar. 24, 2023, which claims the benefit of priority from Chinese Patent Application No. 202210976255.6, filed on Aug. 15, 2022. The content of the aforementioned application, including any intervening amendments made thereto, is incorporated herein by reference in its entirety.

TECHNICAL FIELD

This application relates to bridge engineering, and more particularly to an active control system for suppressing swing and sway behaviors of engineering structures or mechanical systems.

BACKGROUND

The train will experience strong vibration while traveling on an uneven bridge track, and the vibration generated by the train will further cause deformation of the track. As the train's speed and load increase, the track deformation will be exacerbated. The vibration will become more intense as the track's deformation becomes more serious, which indirectly aggravates the effect of the train's vibration on the bridge, and will even lead to the bridge collapse.

Vibration control of the bridge usually adopts a passive control strategy such as using a damper. However, the damper also has the following defects. (1) The damper can only output a linear control force, that is, the damper can only control horizontal vibration and vertical vibration generated by the bridge, but cannot control torsional vibration generated by the bridge. Moreover, the linear control force of the damper will cause chaos phenomenon when the damper controls the torsional vibration of the bridge. The damper has different control effects under different excitation frequencies, however, under a certain excitation frequency, the tuned mass damper has no control effect on the bridge vibration, and may even aggravate the vibration. (2) Because of the coupling effect between displacement and swing angle, the tuned mass damper cannot be used for the control of vibration involving rotation characteristics, therefore, it often fails to effectively control the torsional vibration of the bridge.

SUMMARY

An object of the present application is to provide an active control system for suppressing swing and sway behaviors, solving the technical problem in the existing technology where dampers cannot effectively address the torsional vibrations of bridges, leading to poor stability of the bridges.

To achieve the above objectives, the present disclosure provides the following technical solutions.

An active control system for suppressing swing and sway behaviors, comprising:

• • a first motor;
  • a rotating plate;
  • a sensor; and
  • a controller;
  • wherein the first motor is provided on a to-be-controlled object; the rotating plate is provided on the first motor; the controller is connected to the sensor and the first motor; the sensor is configured to detect a torsional angle of the to-be-controlled object and send the torsional angle to the controller; the controller is configured to process the torsional angle to obtain a processing result, and output a control instruction to the first motor based on the processing result, so as to control the first motor to drive the rotating plate to rotate.

In an embodiment, the active control system further comprises:

• • a second motor;
  • wherein the second motor is connected to the controller; the second motor is provided on the to-be-controlled object; the first motor is provided with a first rotating shaft; the rotating plate is provided on the first rotating shaft; the second motor is provided with a second rotating shaft; the first rotating shaft is drivably connected to the second rotating shaft; and the controller is configured to control the second motor to accelerate rotation of the first rotating shaft based on the processing result.

In an embodiment, the active control system further comprises:

• • a transmission assembly;
  • wherein the first rotating shaft is drivably connected to the second rotating shaft through the transmission assembly.

In an embodiment, the transmission assembly comprises:

• • a first gear; and
  • a second gear;
  • wherein the first gear is sleeved on the first rotating shaft; the second gear is sleeved on the second rotating shaft; and the first gear is engaged with the second gear for transmission.

In an embodiment, a plurality of second motors and a plurality of second gears are provided; a plurality of second rotating shafts are provided; the plurality of second motors are connected to the controller, and are provided on the to-be-controlled object; the plurality of second gears are respectively provided on the plurality of second rotating shafts in one-to-one correspondence; and each of the plurality of second gears is engaged with the first gear.

In an embodiment, the number of the plurality of second motors is four; and the number of the plurality of second gears is four.

In an embodiment, the active control system further comprises:

• • a base assembly;
  • wherein the base assembly is provided inside the to-be-controlled object; and the first motor is provided on the base assembly.

In an embodiment, the base assembly comprises:

• • a mounting seat; and
  • a connecting arm;
  • wherein the connecting arm is provided on the mounting seat; an end of the connecting arm away from the mounting seat is connected to an inner wall of the to-be-controlled object; and the first motor is provided on the mounting seat.

In an embodiment, a plurality of connecting arms are provided; the plurality of connecting arms are provided spaced apart on the mounting seat; and an end of each of the plurality of connecting arms away from the mounting seat is connected to the inner wall of the to-be-controlled object.

In an embodiment, the active control system further comprising:

• • a fixing component;
  • wherein the fixing component is detachably provided on the base assembly; and the first motor and the second motor are provided on a side of the fixing component away from the base assembly.

Compared to the prior art, the present disclosure has the following beneficial effects.

The first motor of the present application is installed on the to-be-controlled object. The torsional angle of the to-be-controlled object is detected through a sensor and is sent to the controller. The controller processes the received torsional angle and, based on the processing result, controls the first motor to drive the rotating plate to rotate, thereby generating a torque that counteracts the torsional vibration of the to-be-controlled object. The torque generated by the rotating plate is then transmitted to the to-be-controlled object through the first motor, counteracting the torsional vibration generated by the to-be-controlled object, thus improving the stability of the to-be-controlled object.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to clarify the technical solutions of the embodiments of the present disclosure, a brief introduction to the drawings required in the embodiments will be provided below. It should be understood that presented in the following drawings are only some embodiments of the present disclosure, and should not be construed as limiting the scope of the disclosure. For those skilled in the art, other related drawings can be obtained based on these drawings without making creative effort.

FIG. 1 is a schematic diagram of the active control system according to an embodiment of the present disclosure;

FIG. 2 is a partially sectional view of the active control system according to an embodiment of the present disclosure; and

FIG. 3 is a partial structural diagram of the active control system according to an embodiment of the present disclosure.

In the figures: 100—active control system; 1—first motor; 2—rotating plate; 3—sensor; 4—controller; 5—to-be-controlled object; 6—connecting component; 7—second motor; 71—second rotating shaft; 8—transmission assembly; 81—first gear; 82—second gear; 9—base assembly; 91—mounting seat; 92—connecting arm; 10—first fixing component; 11—second fixing component; 12—third fixing component; and 13—first rotating shaft.

DETAILED DESCRIPTION OF EMBODIMENTS

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, described below are merely some embodiments of the present disclosure. Based on the embodiments provided herein, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of the present disclosure.

Furthermore, the terms “first”, “second”, etc. are used for descriptive purposes only, and should not be understood as indicating or implying the relative importance. Thus, features defined by “first,” “second,” etc., may explicitly or implicitly include at least one such feature. Furthermore, the term “and/or” throughout the text encompasses three scenarios. Taking “A and/or B” as an example, it includes the technical solution of A, the technical solution of B, and the technical solution where both A and B are satisfied. Moreover, technical solutions from various embodiments may be combined, but such combinations must be achievable by a person of ordinary skill in the art. If the combination of technical solutions results in contradictions or is unfeasible, such a combination should be considered non-existent and is not within the scope of protection claimed by the present disclosure.

As shown in FIGS. 1-3, the present embodiment provides an active control system for suppressing swing and sway behaviors. This active control system 100 includes a first motor 1, a rotating plate 2, a sensor 3, and a controller 4. The first motor 1 is provided on the to-be-controlled object 5, and the rotating plate 2 is provided on the first motor 1. The controller 4 is connected to the sensor 3 and the first motor 1. The sensor 3 is configured to detect the torsional angle of the to-be-controlled object 5 and send the torsional angle to the controller 4. The controller 4 is configured to process the received torsional angle and output corresponding control instructions to the first motor 1, thereby controlling the first motor 1 to drive the rotating plate 2 to rotate.

In this embodiment, the to-be-controlled object 5 is a bridge.

In this embodiment, the first motor 1 is a torque motor, which can generate a large torque, allowing the rotating plate 2 to generate a torque that counteracts the torsional vibration of the to-be-controlled object 5.

The rotating plate 2 can be in the shape of a circle, square or ellipse.

In this embodiment, the sensor 3 is provided on the to-be-controlled object 5, and the controller 4 is provided on the first motor 1.

The active control system 100 further includes a second motor 7, which is connected to the controller 4. The second motor 7 is provided on the to-be-controlled object 5. The first motor 1 is provided with a first rotating shaft 13, and the rotating plate 2 is provided on the first rotating shaft 13. The second motor 7 is provided with a second rotating shaft 71. The first rotating shaft 13 is drivably connected to the second rotating shaft 71. The controller 4 is also configured to control the second motor 7 to accelerate the rotation of the first rotating shaft 13 based on the processing result. By controlling the speed of the second motor 7 through the controller 4, the rotation speed of the first rotating shaft 13 can be accelerated, thereby speeding up the rotation of the rotating plate 2. This allows the rotating plate 2 to quickly generate a torque that counteracts the torsional vibration of the to-be-controlled object 5, improving the torque generation efficiency and control responsiveness of the active control system 100.

In this embodiment, the second motor 7 is a high-speed motor, which has a faster rotation speed. It can be understood that a high-speed motor refers to a motor with a speed exceeding 10,000 r/min.

The active control system 100 also includes a connecting component 6, which connects the first rotating shaft 13 and the rotating plate 2. The connecting component 6 enhances the reliability of the connection between the first rotating shaft 13 and the rotating plate 2.

The active control system 100 further includes a transmission assembly 8. The first rotating shaft 13 is drivably connected to the second rotating shaft 71 via the transmission assembly. When the transmission assembly 8 is damaged, only the damaged transmission assembly 8 needs to be replaced, without the need to replace the first rotating shaft 13 and/or the second rotating shaft 71, thus reducing the replacement cost of the active control system 100.

The transmission assembly 8 includes a first gear 81 and a second gear 82. The first gear 81 is sleeved on the first rotating shaft 13, and the second gear 82 is sleeved on the second rotating shaft 71. The first gear 81 is engaged with the second gear 82 for transmission. The second motor 7 drives the second rotating shaft 71 to rotate, and the second rotating shaft 71 drives the second gear 82 to rotate. The second gear 82 drives the first gear 81 to rotate, which in turn accelerates the rotation of the first rotating shaft 13. Due to the engagement between the first gear 81 and the second gear 82 in the transmission assembly 8, the structure of the transmission assembly 8 is simple and cost-effective; additionally, the transmission efficiency of the first gear 81 and the second gear 82 is high, further enabling the second motor 7 to accelerate the rotation of the rotating plate 2.

A plurality of second motors 7 are provided, a plurality of second gears 82 are provided, and a plurality of rotating shafts are provided. The plurality of second motors 7 are connected to the controller 4 and are provided on the to-be-controlled object 5. The plurality of second gears 82 are respectively provided on the plurality of second rotating shafts 71 in one-to-one correspondence, and each of the plurality of second gears 82 is engaged with the first gear 81. By coordinating multiple second motors 7 and second gears 82, the rotation of the first rotating shaft 13 can be accelerated, enabling the rotating plate 2 to quickly generate a torque that counteracts the torsional vibration of the to-be-controlled object 5. This further improves the torque generation efficiency and control responsiveness of the active control system 100.

In this embodiment, the number of second motors 7 is four and the number of the second gears 82 is four.

In this embodiment, the plurality of second motors 7 are evenly distributed around the first motor 1.

The active control system 100 also includes a base assembly 9, which is provided inside the to-be-controlled object 5. The first motor 1 is provided on the base assembly 9. By installing the base assembly 9 inside the to-be-controlled object 5, the torque generated by the rotating plate 2 can be transmitted through the first motor 1 and base assembly 9 into the to-be-controlled object 5, thereby allowing the torque from the rotating plate 2 to better counteract the torsional vibration generated by the to-be-controlled object 5, thus improving the stability of the to-be-controlled object 5.

The base assembly 9 includes a mounting seat 91 and a connecting arm 92 mounted on the mounting seat 91. The end of the connecting arm 92, away from the mounting seat 91, is connected to the inner wall of the to-be-controlled object 5, and the first motor 1 is provided on the mounting seat 91.

In this embodiment, the connecting arm 92 has a flat bar-shaped structure. Compared to a larger, plate-like connecting arm 92, this design not only reduces costs but also reduces the weight of the active control system 100, thereby reducing the load of the active control system 100 on the to-be-controlled object 5 and improving its safety.

The connecting arm 92 is configured as a plurality of connecting arms 92; the plurality of connecting arms 92 are provided spaced apart on the mounting seat 91; an end of each of the plurality of connecting arms 92 away from the mounting seat 91 is connected to the inner wall of the to-be-controlled object 5. The use of multiple connecting arms 92 not only enhances the reliability of the connection between the mounting seat 91 and the to-be-controlled object 5, but also allows the torque generated by the rotating plate 2 to be transmitted to different parts of the to-be-controlled object 5, making the torque from the rotating plate 2 more effective in counteracting the torsional vibration of the to-be-controlled object 5, thereby improving its stability.

In this embodiment, the plurality of connecting arms 92 are arranged radially.

In this embodiment, the number of the plurality of connecting arms 92 is three.

The active control system 100 also includes a first fixing component 10, which is detachably mounted on the base assembly 9. The first motor 1 and the second motor 7 are respectively mounted on the side of the first fixing component 10 away from the base assembly 9. By attaching or detaching the first fixing component 10, the first motor 1 and the second motor 7 can be installed onto or removed from the base assembly 9, thereby improving the loading and unloading efficiency of the active control system 100.

The active control system 100 also includes a second fixing component 11, which is mounted on the side of the first fixing component 10 away from the base assembly 9. The first motor 1 is mounted on the side of the second fixing component 11 away from the first fixing component 10.

The active control system 100 further includes a third fixing component 12, which is mounted on the first fixing component 10. The second motor 7 is mounted on the side of the second fixing component 11 away from the first fixing component 10.

The work principle of the active control system 100 is as follows.

When the to-be-controlled object 5 undergoes torsional vibration, the torsional angle of the to-be-controlled object 5 is first monitored in real-time by the sensor 3, and the torsional angle is sent to the controller 4. The controller 4 receives the torsional angle sent by the sensor 3, processes the torsional angle through an embedded algorithm, and outputs the corresponding control instructions to the first motor 1 and the second motor 7 based on the processing result. This controls the first motor 1 to generate the corresponding control torque, and the second motor 7 to accelerate the rotation of the first motor 1, causing the rotating plate 2 to quickly generate a torque opposite to the torsional direction of the to-be-controlled object 5. The torque generated by the rotating plate 2 is then transmitted sequentially through the first motor 1, the second fixing component 11, the first fixing component 10, and the base assembly 9 to the to-be-controlled object 5, thereby counteracting the torsional vibration of the to-be-controlled object 5 and improving its stability.

Described above are merely preferred embodiments of this application, and are not intended to limit this application. It should be understood by those skilled in the art that any modifications, equivalent substitutions, and improvements made without departing from the spirit of this application shall fall in the scope of this application defined by the appended claims.