A method and system for vibration reduction of an amphibious vehicle based on magnetorheological material

Abstract

The present disclosure provides a kind of amphibious vehicle damping method and system based on magneto-rheological material, belongs to amphibious vehicle drag reduction and damping technical field.The scheme fills magneto-rheological material to amphibious vehicle cavity structure place;Configuration magnetic field strength adjusting component, utilize current control magnetic fluid viscosity;According to amphibious vehicle driving condition, implement different magnetic field intensity control: when driving on land, increase current intensity, increase viscosity;When driving on water, reduce current intensity, reduce viscosity.The scheme is based on the physical properties of magneto-rheological material under the action of external electromagnetic field, thereby reducing the vibration effect of amphibious vehicle.

Description

Technical Field

[0001] This invention relates to the field of drag reduction and vibration reduction technology for amphibious vehicles, specifically to a vibration reduction method and system for amphibious vehicles based on magnetorheological materials. Background Technology

[0002] Magnetorheological materials (MRAs) can rapidly adjust their physical state under the influence of an external magnetic field, exhibiting a significant change between fluidity and rigidity. In the absence of a magnetic field, MRAs typically consist of magnetic particles and a carrier liquid. The magnetic particles are randomly distributed, and the material exhibits a liquid or low-viscosity state with good fluidity. However, when an external magnetic field is applied, the magnetic particles align along the direction of the field, forming a chain-like structure, which significantly increases the viscosity of the material, resulting in solid-like properties. At this point, the fluidity of the MRA is greatly reduced, and it exhibits high rigidity and drag. This allows them to respond instantaneously to changes in the external environment, making them widely applicable in fields such as drag reduction, control, and adaptive regulation.

[0003] Amphibious vehicles are special vehicles that can travel on land and water. Traditional amphibious vehicles typically employ mechanical or hydraulic designs to reduce drag and vibration when traveling in different media.

[0004] With the continuous development of magnetorheological material technology, the viscosity and stiffness of magnetorheological materials change under the influence of magnetic fields, providing a new approach for amphibious vehicle bodies. Currently, when magnetorheological materials are used for vehicle drag and vibration reduction, they are typically used in magnetorheological dampers, rather than for vehicle body vibration reduction and drag reduction. Summary of the Invention

[0005] In view of this, the present invention provides a vibration reduction method and system for amphibious vehicles based on magnetorheological materials. This solution is based on the rapid adjustment of the physical properties of magnetorheological materials under the action of an external electromagnetic field, thereby reducing the vibration effect of amphibious vehicles.

[0006] To solve the above-mentioned technical problems, the present invention is implemented as follows.

[0007] A vibration reduction method for amphibious vehicles based on magnetorheological materials includes:

[0008] Magnetorheological materials are filled into the cavity structure of the amphibious vehicle; a magnetic field strength adjustment component is configured to control the viscosity of the magnetorheological fluid using current.

[0009] Different magnetic field strength controls are implemented based on the amphibious vehicle's operating conditions: when traveling on land, the current intensity is increased, and the viscosity is increased; when traveling on water, the current intensity is decreased, and the viscosity is reduced.

[0010] Preferably, when traveling on land, increasing the current intensity increases the viscosity; when traveling on water, decreasing the current intensity decreases the viscosity.

[0011] When traveling on land, increasing the current intensity causes the magnetorheological material to enter a solid or high-viscosity state;

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

[0013] Preferably, the method further includes:

[0014] A vibration sensor is configured, and the current intensity is adjusted 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 includes:

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

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

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

[0019] The magnetorheological material injection structure is used to fill the hollow structure of the amphibious vehicle with magnetorheological material.

[0020] The magnetic field strength adjustment component includes an electromagnetic coil and a current adjustment component; the electromagnetic coil is disposed around the magnetorheological material injection structure and connected to the current adjustment component to generate a magnetic field for controlling the physical state of the magnetorheological material;

[0021] Temperature control components are used to regulate the ambient temperature of the magnetorheological material and control the magnetorheological material to operate 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 amphibious vehicle's operating conditions: when traveling on land, the current intensity is increased, and the viscosity is increased; when traveling on water, the current intensity is decreased, and the viscosity is decreased.

[0023] Preferably, the system further includes a vibration sensor mounted on the vehicle body to collect vibration data and send it to the control module;

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

[0025] Preferably, the amphibious vehicle has an inducer wheel, multiple road wheels and a drive wheel connected sequentially to its side, 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, third and fourth road wheels is divided into the second part of the amphibious vehicle body, and the connection between the fifth road wheel and the drive wheel is divided into the third part of the amphibious vehicle body;

[0026] A vibration sensor is installed in each of the three sections: I, II, and III.

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

[0028] Preferably, the magnetorheological material injection structure includes: an inducer wheel, each road wheel, a rib plate, a column, and a vehicle shell at the connection between the drive wheel and the amphibious vehicle body; the magnetorheological material injected at the drive wheel is more than at other connection points.

[0029] Beneficial effects:

[0030] (1) This invention utilizes the variable physical state of magnetorheological materials to fill the hollow parts of an amphibious vehicle. During vehicle operation, different magnetic field strengths are controlled according to the driving conditions. On land, increasing the current intensity increases viscosity, which in turn creates a damping effect, effectively absorbing ground-induced vibrations, enhancing vehicle stability, and improving ride comfort. On water, decreasing the current intensity reduces viscosity to minimize water flow impact and ensure good fluidity, thus improving vehicle performance. Viscosity adjustment ensures optimized drag reduction in both land and water environments, enhancing the amphibious vehicle's performance and comfort.

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

[0032] (3) In a preferred embodiment, a vibration sensor is also provided. Based on the sampling results 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 conditions, thereby realizing 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, multiple magnetorheological material filling positions are provided, which can be adjusted according to the specific conditions of the position, such as temperature, vibration and historical performance, so as to further improve the performance of the amphibious vehicle. Attached Figure Description

[0034] Figure 1 This is a flowchart of the vibration reduction method for amphibious vehicles based on magnetorheological materials according to the present invention.

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

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

[0037] Figure 4 This is a schematic diagram of the vibration reduction system for an amphibious vehicle based on magnetorheological materials according to the present invention.

[0038] Figure 5 This is the vibration acceleration diagram data of the test point at the connection between the amphibious vehicle body and the track under a certain land working condition (40km / h). Detailed Implementation

[0039] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] This invention provides a vibration reduction scheme for amphibious vehicles based on magnetorheological materials. This scheme utilizes the variable physical state of magnetorheological materials, filling the hollow parts of the amphibious vehicle with these materials and configuring a magnetic field strength adjustment component. The viscosity of the magnetorheological fluid is controlled by an electric current. During vehicle operation, different magnetic field strengths are controlled according to the operating conditions. The magnetorheological material is liquid in the absence of an external electromagnetic field, exhibiting low fluidity. As the external electromagnetic field increases, the magnetorheological material becomes solid, increasing its viscosity and rheological properties. Therefore, when driving on land, increasing the current intensity increases the viscosity, which manifests as a damping effect, effectively absorbing vibrations caused by the ground, enhancing vehicle stability, and improving ride comfort. When driving on water, decreasing the current intensity reduces the viscosity, minimizing the impact of water flow on the vehicle body while maintaining good fluidity, thus improving vehicle performance.

[0041] It is evident that by dynamically adjusting the magnetorheological material, this invention can ensure optimized drag reduction and performance of the amphibious vehicle in both amphibious and land environments, thereby improving the vehicle's performance and comfort.

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

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

[0044] The amphibious vehicle has multiple locations where magnetorheological material can be filled. In a preferred embodiment, the magnetorheological material is injected into the ribs, pillars, and hollow structural portions of the vehicle's shell.

[0045] Figure 2 An amphibious vehicle is shown, comprising two idler wheels, ten road wheels, and two drive wheels, as illustrated in the figure. 1 represents the connection point of the idler wheels, 2 the connection point of the first road wheel, 3 the connection point of the second road wheel, 4 the connection point of the third road wheel, 5 the connection point of the fourth road wheel, 6 the connection point of the fifth road wheel, and 7 the connection point of the drive wheels. Using the connection points of the road wheels and drive wheels as boundaries, the connection point between the idler wheels and the first road wheel is classified as Part I of the amphibious vehicle body; the connection points of the second, third, and fourth road wheels are classified as Part II; and the connection point of the fifth road wheel and drive wheels is classified as Part III. Therefore, magnetorheological materials can be injected into the ribs, columns, and body shell at the connections between each road wheel and drive wheel of the amphibious vehicle.

[0046] Taking Part II of the amphibious vehicle body as an example, such as Figure 3 As shown, 9 and 10 represent the hollow structures of the amphibious vehicle's ribs and pillars; 8 represents the hollow structure of a portion of the amphibious vehicle's shell. Furthermore, the amount of magnetorheological material filled into the hollow sections of different amphibious vehicle bodies needs to be adjusted according to the vehicle's structural motion characteristics, such as... Figure 5 As shown, the vertical vibration acceleration experienced by different positions of the vehicle body and the track connection is different. The vibration intensity at the drive wheel is significantly higher than that at other connection points. Therefore, more magnetorheological material needs to be filled in to reduce its vibration.

[0047] Step 2: Configure vibration sensors and magnetic field strength adjustment components to control the viscosity of the magnetofluid.

[0048] The magnetic field strength adjustment component includes an electromagnetic coil and a current adjustment component. The electromagnetic coil is positioned around the magnetorheological material injection structure and connected to the current adjustment component. The current adjustment component generates an external current to control the magnetic field that governs 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 mounted on the vehicle body to collect vibration data. Based on the sampling results from the vibration sensor, the current intensity is adjusted to keep the vibration of the amphibious vehicle within the allowable range of the current driving conditions, thereby achieving fine-tuning of the state under various operating conditions.

[0050] Three sensors are installed in sections I, II, and III of the vehicle to cover different parts of the vehicle, providing more comprehensive vibration data and helping to more accurately determine the vehicle's vibration status. Even if one sensor fails, the other sensors can still provide valid vibration data, ensuring the normal operation of the system.

[0051] In practice, vibration sensors are not necessary; the current can be set to a given value based on the operating conditions.

[0052] Step 3: Configure the temperature control component to regulate the ambient temperature of the magnetorheological material.

[0053] The temperature control components include a temperature sensor, a cooler, and a temperature control system. These components work together to monitor and regulate the temperature of the environment in which the magnetorheological material is located. The temperature sensor monitors the temperature of the magnetorheological material or its surrounding environment in real time. When the temperature exceeds 25°C, the cooler will activate to lower the ambient temperature. The temperature control system can control the cooler's activation and deactivation based on the temperature sensor data to maintain the temperature within a set range.

[0054] Temperature sensors and coolers are installed directly 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 driver's cab of the amphibious vehicle to ensure accurate regulation of the material temperature and keep it below 25°C to prevent damage to the magnetorheological material and reduce vibration damping effect.

[0055] Step 4: Implement different magnetic field strength controls based on the amphibious vehicle's operating conditions: When traveling on land, increase the current intensity and viscosity. When traveling on water, decrease the current intensity and viscosity.

[0056] In this step, if the amphibious vehicle is operating on land, the current flowing through the electromagnetic coil is increased to 3 to 12 amperes. At this point, the viscosity is approximately between 5 Pa·s and 14 Pa·s, ensuring the magnetorheological material enters a solid or high-viscosity state. When the magnetorheological material becomes solid, its viscosity increases significantly, exhibiting a damping effect. Solid magnetorheological materials possess excellent vibration reduction properties, effectively absorbing vibrations caused by the ground, enhancing vehicle stability, and improving ride comfort.

[0057] If the amphibious vehicle is operating on water, the current supplied to the electromagnetic coil is reduced to a few milliamps or de-energized. In this case, the magnetorheological material is in a liquid state or in a low-viscosity state, with a viscosity range of approximately 0.1 Pa·s to 1 Pa·s, in order 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 a vibration reduction system for amphibious vehicles 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 refers to the hollow structure of an amphibious vehicle filled with magnetorheological material. In a preferred embodiment, the magnetorheological material injection structure includes hollow structural portions of the ribs, pillars, and body of the amphibious vehicle. Specifically, it can be the ribs, pillars, and body at the locations of the road wheels and drive wheels of the amphibious vehicle.

[0060] The magnetic field strength adjustment component includes an electromagnetic coil and a current adjustment component; the electromagnetic coil is disposed around the magnetorheological material injection structure and connected to the current adjustment component to generate a magnetic field for controlling the physical state of the magnetorheological material;

[0061] Temperature control components are used to regulate the ambient temperature of the magnetorheological material to prevent high temperatures from damaging the magnetorheological material.

[0062] The control module is used to implement different magnetic field strength controls through the magnetic field strength adjustment component according to the amphibious vehicle's operating conditions: when traveling on land, the current intensity is increased, increasing the viscosity; when traveling on water, the current intensity is decreased, decreasing the viscosity. Specifically, when traveling on land, the magnetorheological material is brought into a solid or high-viscosity state by increasing the current intensity; when traveling on water, the magnetorheological material is brought into a liquid or low-viscosity state by decreasing the current intensity or deactivating the magnetorheological material.

[0063] In a preferred embodiment, the system further includes a vibration sensor installed on the vehicle body to collect vibration data and send 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.

[0064] In summary, the method proposed in this invention, through dynamic adjustment of magnetorheological materials, can ensure optimized drag reduction for amphibious vehicles in both amphibious and land environments, thereby improving the performance and comfort of the amphibious vehicles.

[0065] The specific embodiments described above only illustrate the design principles of the present invention. The shapes and names of the components in this description may differ and are not limited. Therefore, those skilled in the art can modify or make equivalent substitutions to the technical solutions described in the foregoing embodiments; and these modifications and substitutions do not depart from the inventive spirit and technical solutions of the present invention, and should all fall within the protection scope of the present invention.

Claims

1. A vibration reduction method for amphibious vehicles based on magnetorheological materials, characterized in that, The amphibious vehicle has an idler wheel, multiple road wheels, and a drive wheel connected sequentially to its sides, and the two sides of the vehicle body are symmetrically arranged. The connection between the idler wheel and the first road wheel is designated as part I of the amphibious vehicle body; the connection between the second, third, and fourth road wheels is designated as part II of the amphibious vehicle body; and the connection between the fifth road wheel and the drive wheel is designated as part III of the amphibious vehicle body. The vibration reduction method of the amphibious vehicle includes: Magnetorheological material is filled into the cavity structure of the amphibious vehicle to form a magnetorheological material injection structure. The magnetorheological material injection structure includes an idler wheel, each road wheel, a rib plate, a column, and a shell at the connection between the drive wheel and the amphibious vehicle body. More magnetorheological material is injected at the drive wheel than at other connection points. Configure vibration sensors and adjust the current intensity based on the sampling results of the vibration sensors to keep the vibration of the amphibious vehicle within the allowable range of the current driving conditions; install one vibration sensor in each of the three parts: I, II, and III. A magnetic field strength adjustment component is configured, which includes an electromagnetic coil and a current adjustment component. The electromagnetic coil is placed around the magnetorheological material injection structure and 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 viscosity of the magnetorheological fluid is controlled. Depending on the amphibious vehicle's operating conditions, different magnetic field strengths are controlled: when traveling on land, the current flowing through the electromagnetic coil is increased to 3 to 12 amperes, at which point the viscosity is between 5 Pa·s and 14 Pa·s, ensuring that the magnetorheological material enters a high-viscosity state; when traveling on water, the current flowing through the electromagnetic coil is reduced to a few milliamperes or is de-energized, at which point the magnetorheological material is in a liquid state or a low-viscosity state, with a viscosity range between 0.1 Pa·s and 1 Pa·s. The method further includes: configuring a temperature control component, adjusting the ambient temperature of the magnetorheological material, and controlling the magnetorheological material to operate at a safe temperature.

2. The method as described in claim 1, characterized in that, The temperature control components include a temperature sensor, a cooler, and a temperature control system; the temperature sensor and cooler are directly installed near the hollow structure near the magnetorheological material, and are distributed in parts I, II, and III of the vehicle, while the temperature control system is concentrated near the driver's cab of the amphibious vehicle.

3. A vibration reduction system for an amphibious vehicle 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 amphibious vehicle has an induction wheel, multiple road wheels and a drive wheel connected sequentially to its side, and the two sides of the vehicle body are symmetrically arranged. The connection between the induction wheel and the first road wheel is divided into the first part of the amphibious vehicle body, the connection between the second, third and fourth road wheels is divided into the second part of the amphibious vehicle body, and the connection between the fifth road wheel and the drive wheel is divided into the third part of the amphibious vehicle body. The magnetorheological material injection structure is the hollow structure of the amphibious vehicle filled with magnetorheological material; the magnetorheological material injection structure includes: an idler wheel, each road wheel, a rib plate at the connection between the drive wheel and the amphibious vehicle body, a column, and a vehicle shell; the magnetorheological material injected at the drive wheel is more than at other connection points; The magnetic field strength adjustment component includes an electromagnetic coil and a current adjustment component; the electromagnetic coil is disposed around the magnetorheological material injection structure and connected to the current adjustment component to generate a magnetic field for controlling the physical state of the magnetorheological material; Temperature control components are used to regulate the ambient temperature of the magnetorheological material and control the magnetorheological material to operate 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 amphibious vehicle's driving conditions: when driving on land, the current intensity is increased, and the viscosity is increased; when driving on water, the current intensity is decreased, and the viscosity is decreased. The system further includes vibration sensors installed on the vehicle body to collect vibration data and send it to the control module. The control module adjusts the current intensity based on the vibration data to keep the vibration of the amphibious vehicle within the allowable range of the current driving conditions. A vibration sensor is installed in each of the three parts: I, II, and III.

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