Amphibious vehicle vibration reduction method and system based on magnetorheological material

Abstract

The invention provides an amphibious vehicle vibration reduction method and system based on a magnetorheological material, and belongs to the technical field of resistance reduction and vibration reduction of amphibious vehicles. According to the scheme, the cavity structure of the amphibious vehicle is filled with the magnetorheological material; configuring a magnetic field intensity adjusting assembly, and controlling the viscosity of the magnetofluid by using current; according to the running working condition of the amphibious vehicle, different magnetic field intensity control is implemented: when the amphibious vehicle runs on land, the current intensity is increased, and the viscosity is increased; when the vehicle runs on water, the current intensity is reduced, and the viscosity is reduced. According to the scheme, the physical property of the magnetorheological material is rapidly adjusted under the action of an external electromagnetic field, and therefore the vibration effect of the amphibious vehicle is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of drag reduction and vibration reduction of amphibious vehicles, and in particular to a vibration reduction method and system for amphibious vehicles based on magnetorheological materials. Background Art

[0002] Under the influence of an external magnetic field, magnetorheological materials can quickly adjust their physical state, showing significant changes between fluidity and rigidity. In the absence of a magnetic field, magnetorheological materials are usually composed of magnetic particles and a carrier liquid. The magnetic particles are randomly distributed, and the material is in a liquid or low-viscosity state with good fluidity. When an external magnetic field is applied, the magnetic particles will be arranged along the direction of the magnetic field to form a chain structure, thereby significantly increasing the viscosity of the material and showing solid-like properties. At this time, the fluidity of magnetorheological materials is greatly reduced, and they have higher rigidity and resistance. This allows them to respond to changes in the external environment instantly and are widely used in the fields of drag reduction, control and adaptive regulation.

[0003] Amphibious vehicles are special vehicles that can travel on land and sail in water. Traditional amphibious vehicles usually use mechanical or hydraulic designs to reduce the resistance and vibration of the vehicle when traveling in different media.

[0004] With the continuous development of magnetorheological material technology, its viscosity and stiffness will change accordingly by utilizing its rapid response characteristics under the action of magnetic field, which provides a new idea for amphibious vehicle bodies. At present, when magnetorheological materials are used in vehicle drag reduction and vibration reduction, they are usually used in magnetorheological dampers, but not in vehicle body vibration reduction and drag reduction. Summary of the invention

[0005] In view of this, the present invention provides an amphibious vehicle vibration reduction method and system based on magnetorheological materials. The scheme is based on the magnetorheological material quickly adjusting its physical properties under the action of an external electromagnetic field, thereby reducing the vibration effect of the amphibious vehicle.

[0006] In order to solve the above technical problems, the present invention is implemented as follows.

[0007] A method for reducing vibration of an amphibious vehicle based on magnetorheological materials, comprising:

[0008] Filling the magnetorheological material into the cavity structure of the amphibious vehicle; configuring a magnetic field intensity adjustment component to control the viscosity of the magnetic fluid using electric current;

[0009] Different magnetic field strength controls are implemented according to the driving conditions of amphibious vehicles: when driving on land, the current intensity is increased to increase the viscosity; when driving on water, the current intensity is reduced to reduce the viscosity.

[0010] Preferably, when traveling on land, the current intensity is increased to increase the viscosity; when traveling on water, the current intensity is reduced to reduce the viscosity:

[0011] When traveling on land, the current intensity is increased to make the magnetorheological material enter a solid or high viscosity state;

[0012] When traveling on water, the current intensity is reduced or the electromagnetic rheological material is turned off to a liquid or low-viscosity state.

[0013] Preferably, the method further comprises:

[0014] Configure a vibration sensor and adjust the current intensity according to the sampling results of the vibration sensor to keep the vibration of the amphibious vehicle within the allowable range of the current driving conditions.

[0015] Preferably, the method further comprises:

[0016] Configure the temperature control component to adjust the ambient temperature of the magnetorheological material and control the magnetorheological material to work at a safe temperature.

[0017] Preferably, the method of filling the cavity structure of the amphibious vehicle with the magnetorheological material comprises injecting the magnetorheological material into the hollow structure parts of the ribs, pillars and shell of the amphibious vehicle.

[0018] The present invention also provides an amphibious vehicle vibration reduction system based on magnetorheological materials, including a magnetorheological material injection structure, a magnetic field intensity adjustment component, a temperature control component, and a control module;

[0019] The magnetorheological material injection structure is a hollow structure of an amphibious vehicle filled with magnetorheological material;

[0020] A magnetic field intensity regulating component, comprising an electromagnetic coil and a current regulating component; the electromagnetic coil is arranged around the magnetorheological material injection structure, connected to the current regulating component, and generates a magnetic field for controlling the physical state of the magnetorheological material;

[0021] Temperature control component, used to adjust the ambient temperature of the magnetorheological material and control the magnetorheological material to work at a safe temperature;

[0022] The control module is used to implement different magnetic field strength controls through the magnetic field strength adjustment component according to the driving conditions of the amphibious vehicle: when driving on land, the current strength is increased to increase the viscosity; when driving on water, the current strength is reduced to reduce the viscosity.

[0023] Preferably, the system further comprises a vibration sensor, which is arranged on the vehicle body, collects vibration data and sends it to the control module;

[0024] The control module adjusts the current intensity based on the vibration data so that the vibration of the amphibious vehicle remains within the allowable range of the current driving conditions.

[0025] Preferably, the side of the amphibious vehicle is sequentially connected with an inducer wheel, a plurality of road wheels and a driving wheel, and the two sides of the vehicle body are symmetrically arranged; the connection between the inducer wheel and the first road wheel is divided into the first part of the amphibious vehicle body, the connection between the second road wheel, the third road wheel and the fourth road wheel is divided into the second part of the amphibious vehicle body, and the connection between the fifth road wheel and the driving wheel is divided into the third part of the amphibious vehicle body;

[0026] A vibration sensor is set in each of the three parts Ⅰ, Ⅱ and Ⅲ.

[0027] Preferably, when the control module is traveling on land, the current intensity is increased to make the magnetorheological material enter a solid or high-viscosity state; when traveling on water, the current intensity is reduced or the magnetorheological material is turned off to a liquid or low-viscosity state.

[0028] Preferably, the magnetorheological material injection structure includes: ribs, pillars, and a vehicle shell at the connection between the induction wheel, each road wheel, the driving wheel, and the amphibious vehicle body; more magnetorheological material is injected at the driving wheel than at other connections.

[0029] Beneficial effects:

[0030] (1) The present invention utilizes the variable physical state characteristic of magnetorheological materials to fill the magnetorheological materials into the hollow parts of amphibious vehicles. When the amphibious vehicle is traveling, different magnetic field strength controls are implemented according to its driving conditions. When traveling on land, the current intensity is increased, and the viscosity is increased. The increased viscosity manifests as a damping effect, which can effectively absorb vibrations caused by the ground, enhance the stability of the vehicle body, and improve ride comfort. When traveling on water, the current intensity is reduced and the viscosity is reduced to reduce the impact of the water flow on the vehicle body and ensure good fluidity, thereby improving the driving performance of the vehicle. Viscosity adjustment can ensure that the amphibious vehicle achieves an optimized drag reduction effect in two different environments, on land and on water, thereby improving the performance and comfort of the amphibious vehicle.

[0031] (2) In a preferred embodiment, a temperature control component is also provided to prevent high temperature from damaging the magnetorheological material, thereby increasing the life of the amphibious vehicle using the magnetorheological material for vibration reduction.

[0032] (3) In a preferred embodiment, a vibration sensor is also provided. According to the sampling result of the vibration sensor, the current intensity is adjusted so that the vibration of the amphibious vehicle is kept within the allowable range of the current driving condition, thereby achieving fine-tuning of the state under various conditions and further improving the performance and comfort of the amphibious vehicle.

[0033] (4) In a preferred embodiment, a plurality of magnetorheological material filling positions are provided, and they can be adjusted separately according to the specific conditions of the position, such as temperature conditions, vibration conditions, and historical performance conditions, thereby further improving the performance of the amphibious vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 The present invention is a flow chart of the amphibious vehicle vibration reduction method based on magnetorheological materials.

[0035] Figure 2 It is a schematic diagram of the left side of an amphibious vehicle body.

[0036] Figure 3 This is a schematic diagram of the internal structure of Part II of the amphibious vehicle body.

[0037] Figure 4 It is a schematic diagram of the amphibious vehicle vibration reduction system based on magnetorheological materials of the present invention.

[0038] Figure 5 The vibration acceleration diagram data of the test point where the amphibious vehicle body and track are connected under a certain land condition (40km / h). DETAILED DESCRIPTION

[0039] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0040] The present invention provides a vibration reduction scheme for amphibious vehicles based on magnetorheological materials. The scheme adopts the characteristic of variable physical state of magnetorheological materials, fills magnetorheological materials into the hollow part of amphibious vehicles, and configures magnetic field strength adjustment components to control the viscosity of magnetic fluid by electric current. When the amphibious vehicle is traveling, different magnetic field strength controls are implemented according to its driving conditions. The magnetorheological material is in liquid state when there is no external electromagnetic field and has low fluidity. As the external electromagnetic field increases, the magnetorheological material is in solid state, increasing its viscosity and rheology. Then, when traveling on land, the current intensity is increased, the viscosity is increased, and the increase in viscosity is manifested as a damping effect, which can effectively absorb the vibration caused by the ground, enhance the stability of the vehicle body, and improve the ride comfort. When traveling on water, the current intensity is reduced and the viscosity is reduced, so as to reduce the impact of water flow on the vehicle body and ensure good fluidity, thereby improving the driving performance of the vehicle.

[0041] It can be seen that the present invention can ensure that the amphibious vehicle achieves optimized drag reduction and effect in two different environments, namely, water and land, through dynamic adjustment of the magnetorheological material, thereby improving the performance and comfort of the amphibious vehicle.

[0042] Figure 1 A flowchart of a vibration reduction method for an amphibious vehicle based on magnetorheological materials according to a preferred embodiment of the present invention is shown. The method comprises:

[0043] Step 1: Inject magnetorheological material into the cavity structure of the amphibious vehicle to ensure that it can be flexibly adjusted under different working environments.

[0044] The amphibious vehicle has multiple positions that can be filled with magnetorheological material. In a preferred embodiment, the magnetorheological material is injected into the hollow structural parts of the ribs, pillars, and shell of the amphibious vehicle.

[0045] Figure 2 An amphibious vehicle is shown, which includes 2 induction wheels, 10 road wheels and 2 driving wheels. As shown in the figure, 1 is the induction wheel connection, 2 is the first road wheel connection, 3 is the second road wheel connection, 4 is the third road wheel connection, 5 is the fourth road wheel connection, 6 is the fifth road wheel connection, and 7 is the driving wheel connection. Taking the road wheel and driving wheel connection as the boundary, the induction wheel and the first road wheel connection are divided into the amphibious vehicle body part I, the second road wheel, the third road wheel and the fourth road wheel connection are divided into the amphibious vehicle body part II, and the fifth road wheel and the driving wheel connection are divided into the amphibious vehicle body part III. Therefore, the magnetorheological material can be injected into the ribs, pillars and car shells at the connection between each road wheel and the driving wheel of the amphibious vehicle.

[0046] Take the second part of the amphibious vehicle as an example. Figure 3 As shown, 9 and 10 are hollow structures of amphibious vehicle body ribs and pillars; 8 is a hollow structure of a part of the amphibious vehicle body shell. In addition, the amount of magnetorheological material filled in the hollow parts of different amphibious vehicle bodies needs to be adjusted according to the motion characteristics of the vehicle body structure, such as Figure 5 As shown, different positions of the vehicle body and the track connection are subject to different vertical vibration accelerations, and the vibration intensity at the driving wheel is significantly higher than that at other connections, so more magnetorheological materials need to be filled in to reduce its vibration.

[0047] Step 2, configure the vibration sensor and magnetic field strength adjustment component to control the viscosity of the magnetic fluid.

[0048] The magnetic field intensity adjustment component includes an electromagnetic coil and a current adjustment component. The electromagnetic coil is arranged around the magnetorheological material injection structure and is connected to the current adjustment component. The current adjustment component generates an external current to control the magnetic field of the physical state of the magnetorheological material. By controlling the magnitude of the current, the properties of the magnetorheological material are controlled.

[0049] In this preferred embodiment, a vibration sensor is arranged on the vehicle body to collect vibration data. According to the sampling result of the vibration sensor, the current intensity is adjusted so that the vibration of the amphibious vehicle is kept within the allowable range of the current driving condition, thereby achieving fine adjustment of the state under various conditions.

[0050] Three sensors are set up in the first, second and third parts of the vehicle to cover different parts of the vehicle and provide more comprehensive vibration data, which helps to more accurately judge the vibration status of the vehicle. Even if a sensor fails, other sensors can still provide effective vibration data to ensure the normal operation of the system.

[0051] In practice, it is not necessary to add a vibration sensor, and the current can be set at a given value according to the working conditions.

[0052] Step 3: configure a temperature control component to adjust the ambient temperature of the magnetorheological material.

[0053] The temperature control component includes a temperature sensor, a cooler, and a temperature control system. These components work together to monitor and adjust the temperature of the environment in which the magnetorheological material is located. The temperature sensor is used to monitor the temperature of the magnetorheological material or the surrounding environment in real time. When the temperature is higher than 25°C, the cooler will start to lower the ambient temperature. The temperature control system can control the start and stop of the cooler based on the data from the temperature sensor to maintain the temperature within the set range.

[0054] Temperature sensors and coolers are directly installed near the hollow structure near the magnetorheological material, and are distributed in parts I, II, and III of the vehicle. The temperature control system is concentrated near the cab of the amphibious vehicle to ensure accurate control of the material temperature and keep the temperature below 25°C to prevent damage to the magnetorheological material and reduce the vibration reduction effect.

[0055] Step 4: Implement different magnetic field strength controls according to the driving conditions of the amphibious vehicle: when driving on land, increase the current strength and increase the viscosity; when driving on water, reduce the current strength and reduce the viscosity.

[0056] In this step, if the driving condition of the amphibious vehicle is land driving, the current passed through the electromagnetic coil is increased to 3 amperes to 12 amperes. At this time, the viscosity is about 5 Pa·s to 14 Pa·s, ensuring that the magnetorheological material enters a solid or high viscosity state. When the magnetorheological material turns to a solid state, its viscosity increases greatly, showing a damping effect. Solid magnetorheological materials have good vibration reduction properties, can effectively absorb vibrations caused by the ground, enhance vehicle stability, and improve ride comfort.

[0057] If the amphibious vehicle is traveling on water, the current passed through the electromagnetic coil is reduced to more than ten milliamperes or is in a power-off state. At this time, the magnetorheological material is in liquid or low-viscosity state, and the viscosity range is approximately between 0.1Pa·s and 1Pa·s, so as to reduce the impact of water flow on the vehicle body and ensure good fluidity, thereby improving the vehicle's driving performance.

[0058] Based on the above method, the present invention provides an amphibious vehicle vibration reduction system based on magnetorheological materials, such as Figure 4As shown, the system includes a magnetorheological material injection structure, a magnetic field strength adjustment component, a temperature control component and a control module.

[0059] The magnetorheological material injection structure is a hollow structure of an amphibious vehicle filled with magnetorheological material. In a preferred embodiment, the magnetorheological material injection structure includes a hollow structure part at the ribs, pillars, and vehicle shell of the amphibious vehicle. Specifically, it can be the ribs, pillars, and vehicle shell at the positions of each road wheel and driving wheel of the amphibious vehicle.

[0060] A magnetic field intensity regulating component, comprising an electromagnetic coil and a current regulating component; the electromagnetic coil is arranged around the magnetorheological material injection structure, connected to the current regulating component, and generates a magnetic field for controlling the physical state of the magnetorheological material;

[0061] Temperature control component, used to adjust the ambient temperature of the magnetorheological material to prevent high temperature from damaging the magnetorheological material;

[0062] The control module is used to implement different magnetic field intensity controls through the magnetic field intensity adjustment component according to the driving conditions of the amphibious vehicle: when driving on land, the current intensity is increased to increase the viscosity; when driving on water, the current intensity is reduced to reduce the viscosity. Specifically, when driving on land, the magnetorheological material is made into a solid state or a high viscosity state by increasing the current intensity; when driving on water, the magnetorheological material is made into a liquid state or a low viscosity state by reducing the current intensity or cutting off the current intensity.

[0063] In a preferred embodiment, the system also includes a vibration sensor, which is arranged on the vehicle body, collects vibration data and sends it to the control module; the control module adjusts the current intensity based on the vibration data so that the vibration condition of the amphibious vehicle remains within the allowable range of the current driving condition.

[0064] In summary, the method proposed in the present invention can ensure that the amphibious vehicle achieves optimized drag reduction effect in two different environments, namely, water and land, through dynamic adjustment of the magnetorheological material, thereby improving the performance and comfort of the amphibious vehicle.

[0065] The above specific embodiments only describe the design principle of the present invention. The shapes and names of the components in the description may be different and are not limited. Therefore, those skilled in the art in the field of the present invention may modify or replace the technical solutions recorded in the above embodiments; and these modifications and replacements do not deviate from the creative purpose and technical solutions of the present invention and should all fall within the protection scope of the present invention.

Claims

1. A method for reducing vibration of an amphibious vehicle based on magnetorheological materials, characterized in that: include: Filling the magnetorheological material into the cavity structure of the amphibious vehicle; A magnetic field strength adjustment component is configured to control the viscosity of the magnetic fluid using electric current; Different magnetic field strength controls are implemented according to the driving conditions of amphibious vehicles: when driving on land, the current intensity is increased to increase the viscosity; when driving on water, the current intensity is reduced to reduce the viscosity.

2. The method according to claim 1, characterized in that When traveling on land, the current intensity is increased to increase the viscosity; when traveling on water, the current intensity is reduced to reduce the viscosity: When traveling on land, the current intensity is increased to make the magnetorheological material enter a solid or high viscosity state; When traveling on water, the current intensity is reduced or the electromagnetic rheological material is turned off to a liquid or low-viscosity state.

3. The method according to claim 1 or 2, characterized in that The method further comprises: Configure a vibration sensor and adjust the current intensity according to the sampling results of the vibration sensor to keep the vibration of the amphibious vehicle within the allowable range of the current driving conditions.

4. The method according to claim 1, characterized in that The method further comprises: Configure the temperature control component to adjust the ambient temperature of the magnetorheological material and control the magnetorheological material to work at a safe temperature.

5. The method according to claim 1, characterized in that The method of filling the cavity structure of the amphibious vehicle with the magnetorheological material comprises injecting the magnetorheological material into the hollow structure parts of the ribs, pillars and shell of the amphibious vehicle.

6. An amphibious vehicle vibration reduction system based on magnetorheological materials, characterized in that: It includes a magnetorheological material injection structure, a magnetic field strength adjustment component, a temperature control component, and a control module; The magnetorheological material injection structure is a hollow structure of an amphibious vehicle filled with magnetorheological material; A magnetic field intensity regulating component, comprising an electromagnetic coil and a current regulating component; the electromagnetic coil is arranged around the magnetorheological material injection structure, connected to the current regulating component, and generates a magnetic field for controlling the physical state of the magnetorheological material; Temperature control component, used to adjust the ambient temperature of the magnetorheological material and control the magnetorheological material to work at a safe temperature; The control module is used to implement different magnetic field strength controls through the magnetic field strength adjustment component according to the driving conditions of the amphibious vehicle: when driving on land, the current intensity is increased to increase the viscosity; When traveling on water, reduce the current strength and reduce viscosity.

7. The system according to claim 6, characterized in that The system further includes a vibration sensor, which is arranged on the vehicle body, collects vibration data and sends it to the control module; The control module adjusts the current intensity based on the vibration data so that the vibration of the amphibious vehicle remains within the allowable range of the current driving conditions.

8. The system according to claim 7, characterized in that The side of the amphibious vehicle is connected with an inducer wheel, a plurality of road wheels and a driving wheel in sequence, and the two sides of the vehicle body are symmetrically arranged; the connection between the inducer wheel and the first road wheel is divided into the first part of the amphibious vehicle body, the connection between the second road wheel, the third road wheel and the fourth road wheel is divided into the second part of the amphibious vehicle body, and the connection between the fifth road wheel and the driving wheel is divided into the third part of the amphibious vehicle body; A vibration sensor is set in each of the three parts Ⅰ, Ⅱ and Ⅲ.

9. The system according to claim 6, characterized in that When the control module is traveling on land, the current intensity is increased to make the magnetorheological material enter a solid state or a high-viscosity state; when traveling on water, the current intensity is reduced or the magnetorheological material is turned off to a liquid state or a low-viscosity state.

10. The system according to claim 6, characterized in that The magnetorheological material injection structure includes: ribs, columns and shells at the connection between the induction wheel, each road wheel, the driving wheel and the amphibious vehicle body; the magnetorheological material injected at the driving wheel is more than that at other connections.

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