An electric vehicle steering integrated control system

Abstract

The present invention discloses an electric vehicle steering integrated control system, comprising a motor assembly, the motor assembly having a first mounting surface and a second mounting surface arranged relatively to each other; the first mounting surface is provided with a controller assembly, the controller assembly comprising a controller housing fixedly connected to the motor assembly, a steering controller and a radiator being mounted in sequence in the controller housing, the radiator being used to dissipate heat from the steering controller and the motor assembly; the second mounting surface is provided with a steering pump, the output shaft of the motor assembly is provided with a transmission adapter, one end of the transmission adapter extends into the steering pump; this integrated control system greatly saves installation space, simplifies the system structure, and achieves faster response and higher steering accuracy by tightly integrating the steering pump, the motor assembly and the steering controller, while the shared heat dissipation system not only further reduces costs and installation controls, but also ensures better heat dissipation performance, thereby improving the reliability and durability of the entire system.

Description

Technical Field

[0001] The present invention relates to the technical field of electric steering, and in particular to an electric vehicle steering integrated control system. Background Art

[0002] The steering system used in electric vehicles is one of the key components for vehicle dynamic stability and driving safety. It allows the driver to control the direction of the vehicle. Modern electric vehicles generally use electronically controlled power steering systems (EPS). The EPS system has been widely used in electric vehicles due to its advantages such as fast response speed, high control accuracy, energy saving and emission reduction.

[0003] The electric vehicle steering system in the existing technology is mainly composed of a steering mechanism, a steering motor, a steering controller and associated sensors; the steering motor is responsible for providing auxiliary force, while the steering controller is responsible for controlling the operation of the system, and controls the motor to output corresponding power based on driver input and sensor feedback; this system still has certain defects and shortcomings. The existing system mostly adopts independent steering motor and steering controller structures, which are connected by aviation plugs. At the same time, the steering motor and steering controller need to be equipped with corresponding heat dissipation structures to cool down. This design increases space occupancy, increases manufacturing costs, and also increases installation complexity, which is not conducive to the integrated design of electric vehicles and limits their application scope.

[0004] In view of this, it is necessary to improve the electric vehicle steering system in the prior art to solve the technical problem that each component of the system is independently installed and occupies a large space volume. Summary of the Invention

[0005] The purpose of the present invention is to provide an electric vehicle steering integrated control system to solve the above technical problems.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] An electric vehicle steering integrated control system includes a motor assembly having a first mounting surface and a second mounting surface disposed opposite to each other;

[0008] The first mounting surface is provided with a controller assembly, the controller assembly including a controller housing fixedly connected to the motor assembly, a steering controller and a radiator being sequentially installed in the controller housing, the radiator being used to dissipate heat from the steering controller and the motor assembly;

[0009] The second mounting surface is provided with a steering pump, and the output shaft of the motor assembly is provided with a transmission adapter, one end of which extends into the steering pump; the motor assembly runs to drive the transmission adapter to rotate in the steering pump.

[0010] Optionally, a mounting boss is provided on one side wall of the controller housing, the mounting boss is provided with a mounting channel communicating with the inner cavity of the controller housing, and one end of the mounting channel is provided with a mounting opening;

[0011] The mounting openings are provided with a plurality of them, each of which is provided with a high-voltage input connector and a low-voltage control connector; the high-voltage input connector and the low-voltage control connector are electrically connected to the steering controller through the mounting channels.

[0012] An installation window communicating with the installation channel is provided on the upper end surface of the installation boss, and the installation window is provided with a waterproof cover;

[0013] One end of the waterproof cover extends into the installation channel and is detachably connected to the high-voltage input connector or the low-voltage control connector.

[0014] Optionally, a position sensor is provided on the motor assembly, and the position sensor is electrically connected to the steering controller;

[0015] The position sensor is connected to the output shaft of the motor assembly, and is used to detect the rotation angle of the motor to generate first detection information and transmit it to the steering controller.

[0016] Optionally, the position sensor includes a PCB board, an encoder is provided on the PCB board, the encoder is connected to a rotating block, and the rotating block is circumferentially connected to the output shaft of the motor assembly.

[0017] Optionally, a detection port is opened on the side wall of the steering pump, and a pressure sensor is provided at the detection port. The pressure sensor is used to detect the pressure value in the steering pump to generate second detection information and transmit it to the steering controller.

[0018] Optionally, a mounting bracket is fitted on one side wall of the motor assembly, and an anti-vibration assembly is provided on an end face of the mounting bracket away from the motor assembly;

[0019] The anti-vibration assembly includes four anti-vibration pads, which are respectively arranged at the four corners of the mounting bracket.

[0020] Optionally, the radiator is a cooling fan, and the cooling fan forms an air flow channel that flows through the steering controller and the motor assembly in sequence;

[0021] A fan cover is provided at one end of the controller housing away from the motor assembly, and a protective surface cover is provided on one side of the fan cover.

[0022] Optionally, a positioning groove is provided at one end of the output shaft of the motor assembly;

[0023] The transmission adapter comprises a plug-in portion and a transfer portion, wherein the plug-in portion is inserted into the positioning groove and is circumferentially fixedly connected to the output shaft of the motor assembly;

[0024] The adapter extends into the steering pump, and a sealing ring is provided on the outer shell of the adapter, and the sealing ring is used to seal the gap space between the adapter and the steering pump.

[0025] Optionally, a waterproof sealing gasket is provided on one end surface of the controller housing close to the motor assembly, and the waterproof sealing gasket is used to seal the gap space between the controller housing and the motor assembly.

[0026] Compared with the prior art, the present invention has the following beneficial effects: during installation, the controller assembly and the steering pump are integrated and installed on the first mounting surface and the second mounting surface of the motor assembly respectively; when the system receives a steering command, the steering controller processes it and drives the motor assembly to work; the motor assembly directly drives the steering pump arranged on the second mounting surface through the transmission adapter to achieve steering assistance; at the same time, the radiator integrated in the controller housing provides continuous heat dissipation for the steering controller and the motor assembly to ensure the stability and efficiency of the entire system during operation; this integrated control system greatly saves installation space and simplifies the system structure by tightly integrating the steering pump, motor assembly and steering controller, achieving faster response and higher steering accuracy; at the same time, the shared heat dissipation system not only further reduces costs and installation controls, but also ensures better heat dissipation performance, thereby improving the reliability and durability of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] The structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not intended to limit the conditions under which the present invention can be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportional relationships, or adjustments in size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and objectives that can be achieved by the present invention.

[0029] Figure 1 This is one of the overall schematic diagrams of the electric vehicle steering integrated control system of this embodiment;

[0030] Figure 2 This is the second overall schematic diagram of the electric vehicle steering integrated control system of this embodiment;

[0031] Figure 3 This is a schematic diagram of the installation structure of the position sensor of the electric vehicle steering integrated control system of this embodiment;

[0032] Figure 4 Schematic diagram of the exploded structure of the electric vehicle steering integrated control system of this embodiment;

[0033] Figure 5 Schematic diagram of a controller housing of an electric vehicle steering integrated control system according to this embodiment;

[0034] Figure 6 This is a schematic structural diagram of a position sensor of an electric vehicle steering integrated control system according to this embodiment;

[0035] Figure 7 This is a schematic structural diagram of the steering pump of the electric vehicle steering integrated control system according to this embodiment.

[0036] Illustrations: first group of bolts 1, protective cover 2, second group of bolts 3, fan cover 4, radiator 5, third group of bolts 6, controller housing 7, waterproof cover 8, low-voltage control connector 9, high-voltage input connector 10, waterproof sealing gasket 11, steering controller 12, fourth group of bolts 13, position sensor 14, motor assembly 15, transmission adapter 16, sealing ring 17, pressure sensor 18, fifth group of bolts 19, steering pump 20, sixth group of bolts 21, mounting bracket 22, seventh group of bolts 23, shock-absorbing foot pads 24, controller assembly 25, first mounting surface 26, second mounting surface 27, mounting boss 28, mounting port 29, output shaft 30, mounting window 31, PCB board 32, encoder 33, rotating block 34, detection port 35, positioning groove 36, plug-in portion 37, adapter portion 38. DETAILED DESCRIPTION

[0037] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally located component.

[0039] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0040] Combine Figures 1 to 7 As shown, the embodiment of the present invention provides an electric vehicle steering integrated control system, including a motor assembly 15, the motor assembly 15 having a first mounting surface 26 and a second mounting surface 27 arranged opposite to each other; Figure 1 As shown, the first mounting surface 26 and the second mounting surface 27 are respectively located at two ends of the motor assembly 15 .

[0041] A controller assembly 25 is mounted on the first mounting surface 26. This assembly includes a controller housing 7 fixedly connected to the motor assembly 15. The steering controller 12 and a heat sink 5 are mounted in sequence within the housing 7. The heat sink 5 dissipates heat from the steering controller 12 and the motor assembly 15. The controller assembly 25 is fixedly connected to the motor assembly 15 via a third set of bolts 6, while the heat sink 5 is fixedly connected to the controller housing 7 via a second set of bolts 3 (specifically, four M3 screws). The steering controller 12 is tightly integrated with the motor assembly 15, reducing external connections and space requirements. The integration of the heat sink 5 also ensures effective heat dissipation from the steering controller 12 and the motor assembly 15, improving system stability and extending system life.

[0042] The steering pump 20 is mounted on the second mounting surface 27. A transmission adapter 16 is mounted on the output shaft 30 of the motor assembly 15, one end of which extends into the steering pump 20. Operation of the motor assembly 15 drives the transmission adapter 16 to rotate within the steering pump 20. The steering pump 20 is mounted to the motor assembly 15 via a fifth set of bolts 19 (specifically, two M10 screws). The arrangement of the steering pump 20 on the second mounting surface 27 of the motor assembly 15 further optimizes the system's compactness. Furthermore, by mounting the transmission adapter 16 on the output shaft 30 of the motor assembly 15, with one end extending into the steering pump 20, when the motor is running, the transmission adapter 16 directly drives the steering pump 20, providing steering assistance. This direct connection reduces transmission losses and improves the efficiency and reliability of the entire system.

[0043] The working principle of the present invention is as follows: during installation, the controller assembly 25 and the steering pump 20 are respectively integrated and installed on the first mounting surface 26 and the second mounting surface 27 of the motor assembly 15. When the system receives a steering instruction, the steering controller 12 processes it and drives the motor assembly 15 to work. The motor assembly 15 directly drives the steering pump 20 set on the second mounting surface 27 through the transmission adapter 16 to achieve steering assistance. At the same time, the radiator 5 integrated in the controller housing 7 provides continuous heat dissipation for the steering controller 12 and the motor assembly 15 to ensure the stability and efficiency of the entire system during operation. Compared with the steering system in the prior art, this integrated control system greatly saves installation space and simplifies the system structure by tightly integrating the steering pump 20, the motor assembly 15 and the steering controller 12, achieving faster response and higher steering accuracy. At the same time, the shared heat dissipation system not only further reduces costs and installation controls, but also ensures better heat dissipation performance, thereby improving the reliability and durability of the entire system.

[0044] In this embodiment, a mounting boss 28 is provided on one side wall of the controller housing 7, and the mounting boss 28 is provided with a mounting channel connected to the inner cavity of the controller housing 7, and a mounting port 29 is provided at one end of the mounting channel; there are multiple mounting ports 29, which are respectively installed with a high-voltage input connector 10 and a low-voltage control connector 9; the high-voltage input connector 10 and the low-voltage control connector 9 are respectively electrically connected to the steering controller 12 through the mounting channels; the system only needs a pair of high-voltage input and a pair of low-voltage control connectors 9, which greatly simplifies the connection between the steering controller 12 and the steering motor. Compared with the complicated cable connection in the traditional design, it not only reduces the manufacturing cost, but also reduces the complexity of installation.

[0045] The upper surface of mounting boss 28 defines a mounting window 31 that extends through the mounting channel. Mounting window 31 is fitted with a waterproof cover 8. One end of waterproof cover 8 extends into the mounting channel and detachably connects to either high-voltage input connector 10 or low-voltage control connector 9. This detachable connection between the two connectors facilitates maintenance and enhances the system's waterproof performance, preventing moisture and impurities from entering the controller and protecting the electrical connections from damage.

[0046] In summary, this system achieves system simplification and cost-effectiveness by optimizing the settings of connections and connectors, while maintaining high reliability and low failure rate.

[0047] In this embodiment, a position sensor 14 is provided on the motor assembly 15, and the position sensor 14 is electrically connected to the steering controller 12; wherein, the position sensor 14 is mounted on the motor assembly 15 through a fourth set of bolts 13; this integration method enables the sensor to directly monitor the operating status of the motor assembly 15 and provide more accurate feedback.

[0048] The position sensor 14 is connected to the output shaft 30 of the motor assembly 15. It detects the motor's rotational angle, generating first detection information that is transmitted to the steering controller 12. This sensor's primary function is to detect the motor's rotational angle and generate first detection information regarding the motor's position. This information is transmitted to the steering controller 12, allowing it to adjust its output based on the actual motor position, thereby improving the steering system's accuracy and responsiveness.

[0049] To further illustrate, the position sensor 14 includes a PCB 32, on which an encoder 33 is mounted. The encoder 33 is connected to a rotating block 34, which is circumferentially connected to the output shaft 30 of the motor assembly 15. When the output shaft 30 of the motor assembly 15 rotates, it drives the rotating block 34 to rotate synchronously, which in turn drives the rotating ring on the encoder 33 to rotate synchronously. This causes the encoder 33 to generate a photoelectric signal, which is transmitted to the PCB 32. The signal is then transmitted to the steering controller 12 for signal recognition and analysis, thereby identifying the motor's rotational angle.

[0050] By integrating position sensor 14 with motor assembly 15 and ensuring its direct connection to the motor's output shaft 30, this design significantly improves the steering system's control accuracy and responsiveness. Real-time feedback from position sensor 14 enables steering controller 12 to more precisely adjust motor output, providing more refined and smooth steering assistance. This design also helps prevent motor overload and overcurrent caused by a lack of position feedback, further enhancing system reliability.

[0051] As a preferred solution of this embodiment, a detection port 35 is opened on the side wall of the steering pump 20, and a pressure sensor 18 is provided at the detection port 35. The pressure sensor 18 is used to detect the pressure value in the steering pump 20 to generate second detection information and transmit it to the steering controller 12.

[0052] By providing real-time pressure feedback to the steering controller 12, the response speed of the system is improved, and the intelligence and adaptability of the system are enhanced; the steering controller 12 can adjust the magnitude of the steering assist force according to the real-time pressure data to achieve more precise and smooth steering control. This adaptive adjustment not only improves the efficiency of the steering system, but also helps to reduce energy consumption and reduce noise, thereby improving the smoothness of operation.

[0053] In this embodiment, a mounting bracket 22 is fitted on one side wall of the motor assembly 15 , and a shockproof component is provided on one end surface of the mounting bracket 22 away from the motor assembly 15 ;

[0054] The anti-vibration assembly includes four anti-vibration pads 24, which are respectively arranged at the four corners of the mounting bracket 22. The mounting bracket 22 is mounted on the motor assembly 15 using the sixth set of bolts 21 (specifically, six M6 screws), and the anti-vibration assembly is mounted on the mounting bracket 22 using the seventh set of bolts 23 (specifically, four M8 screws).

[0055] An anti-vibration assembly is fitted onto the mounting bracket 22, comprising four anti-vibration pads 24, which are located at the four corners of the mounting bracket 22. Through this layout, the anti-vibration assembly can effectively absorb and reduce the impact caused by vibration, protecting the motor assembly 15 and the steering controller 12 from vibration damage.

[0056] Specifically, the radiator 5 is a cooling fan, which forms an air flow channel that flows through the steering controller 12 and the motor assembly 15 in sequence;

[0057] The heat dissipation solution involves a cooling fan that can create an airflow channel through the steering controller 12 and the motor assembly 15. This design ensures that the cooling fan can effectively transport hot air out of the system, ensuring efficient operation and heat dissipation performance of the system.

[0058] A fan cover 4 is provided at one end of the controller housing 7, away from the motor assembly 15. A protective cover 2 is provided on one side of the fan cover 4. The fan cover 4 is fixedly connected to the controller housing 7 by a first set of bolts 1. The protective cover 2 on the fan cover 4 prevents direct damage to the cooling fan due to accidents or during maintenance.

[0059] In summary, the mounting design of the motor assembly 15 and steering controller 12 in this embodiment not only considers stability and system protection, but also takes into account heat dissipation efficiency and component safety. The use of anti-vibration pads 24 reduces the impact of vibration, enhancing the system's stable operation and long-term reliability. Furthermore, the provision of a cooling fan and fan cover 4 ensures that the steering system maintains a normal temperature even under high loads, preventing performance degradation or damage due to overheating. These comprehensive design measures significantly enhance the overall performance and durability of the electric vehicle steering integrated control system.

[0060] In this embodiment, a positioning groove 36 is provided at one end of the output shaft 30 of the motor assembly 15; the transmission adapter 16 includes a plug-in portion 37 and a transfer portion 38, the plug-in portion 37 is inserted into the positioning groove 36, and is circumferentially fixedly connected to the output shaft 30 of the motor assembly 15; the transfer portion 38 extends into the steering pump 20, and a sealing ring 17 is provided on the outer sleeve of the transfer portion 38, which is used to seal the gap space between the transfer portion 38 and the steering pump 20.

[0061] This solution achieves high-precision connection of the transmission adapter 16 through the coordinated design of the positioning groove 36 and the transmission adapter 16, ensuring stable operation without significant power loss to the steering pump 20. Furthermore, the use of the sealing ring 17 to seal the gap not only extends the life of the steering pump 20 and the entire steering system, but also reduces maintenance costs and system failure rates caused by leakage, ensuring efficient and reliable power output and long-term stable performance.

[0062] In this embodiment, a waterproof gasket 11 is provided on one end of the controller housing 7 near the motor assembly 15. This gasket is used to seal the gap between the controller housing 7 and the motor assembly 15. Located on the end of the controller housing 7 near the motor assembly 15, the gasket fills the gap between the two, providing a waterproof and dustproof design. This design prevents moisture and dust from intruding and potentially affecting electrical components, improving the environmental adaptability of the steering controller 12 and making it suitable for diverse operating conditions.

[0063] The main part of the electric vehicle steering integrated control system includes a motor assembly 15 and a steering pump 20. The motor assembly 15 is used to provide power to the steering pump 20, thereby controlling the operation of the steering system; wherein, the motor assembly 15 is correspondingly provided with a position sensor 14, and the steering pump 20 is correspondingly provided with a pressure sensor 18. The position sensor 14 is used to identify the rotation speed v and rotation angle r of the output shaft of the motor assembly 15, and the pressure sensor 18 is used to identify the hydraulic pressure t in the steering pump 20.

[0064] Preferably, this solution also provides an electric vehicle steering control method, which specifically includes the following steps:

[0065] S1, collecting data on the current output shaft rotation speed v1 and rotation angle r1 of the motor assembly 15 from the position sensor 14, and obtaining data on the hydraulic pressure t1 in the steering pump 20 from the pressure sensor 18;

[0066] This step collects basic data to provide real-time input to the control system. The motor's speed (v1) and angle (r1) are collected to determine the motor's initial state. Furthermore, hydraulic pressure data (t1) is collected to monitor the steering pump's operating status. This data forms the basis for subsequent control decisions.

[0067] S2, using a preset algorithm to predict the output of the motor component within a preset future time to obtain predicted Ve and Re; the preset future time in this solution is a short time period;

[0068] Based on the current data, the state at the next moment is predicted, and the preset algorithm (this solution uses the Kalman filter algorithm) is used to predict the future motor output (speed Ve and angle Re). This helps to anticipate possible situations and prepare corresponding control strategies in advance.

[0069] S3, setting an initial steering force output u0 based on the predicted Ve and Re and the current vehicle dynamic state;

[0070] Based on the predicted data and the vehicle's current dynamics (such as speed and acceleration), an initial steering force output is set. This step aims to create an initial operating baseline that takes into account the vehicle's current dynamics and predicted motor behavior, providing a starting point for subsequent fine-tuning.

[0071] S4, by comparing the current hydraulic pressure t1 in the steering pump 20 with the initial steering power output u0, when the deviation between the two exceeds a first threshold, formulating a first motor adjustment strategy;

[0072] An adjustment strategy is developed based on the deviation between the current and expected states. This step triggers the strategy to adjust the motor output when there is a significant deviation between the hydraulic pressure t1 and the preset power output u0; this key step ensures that the actual performance of the steering system meets expectations.

[0073] S5, adjusting the operation of the motor assembly according to the first motor adjustment strategy, and detecting the hydraulic pressure t2 in the steering pump 20 in real time through the pressure sensor 18, so that the hydraulic pressure t2 and the steering power output u0 are less than a first threshold;

[0074] Adjust and monitor the hydraulic pressure in real time to match the power output. Through real-time monitoring and adjustment, this step ensures that the deviation between the hydraulic pressure t2 and the steering power output u0 remains within a controllable range; this is a dynamic adjustment process that ensures that the system responds promptly and accurately.

[0075] S6, using the electric vehicle's recognition system to identify and obtain driving scene information, and adjusting the hydraulic control strategy based on the current driving scene information to adjust the initial steering power output u0 to obtain a dynamically changing Ue;

[0076] Adjust the hydraulic control strategy according to the driving scenario. This step optimizes the hydraulic control strategy by analyzing the driving scenario, allowing the steering system to adapt to different driving conditions. This scenario recognition can significantly improve the adaptability and flexibility of the system.

[0077] S7 , formulating a second motor adjustment strategy based on the difference between the real-time hydraulic pressure t2 and the dynamically changing Ue, and adjusting the operation of the motor assembly using the second motor adjustment strategy.

[0078] This step further refines motor control by adjusting the motor based on real-time data and dynamic steering requirements. By comparing the real-time hydraulic pressure t2 with the dynamically changing Ue, the motor output is adjusted in real time. This adaptive adjustment process ensures that the steering system performs optimally in all situations.

[0079] In summary, this method adopts hierarchical and progressive control logic, fully utilizes sensor data, and achieves precise and efficient electric vehicle steering control through dynamic adjustment and real-time feedback.

[0080] In this embodiment, it is specifically described that step S2 specifically includes:

[0081] S21, set the prediction time range, select key variables that affect motor performance, and obtain historical data of key variables; key variables include current speed, rotation angle, and vehicle speed.

[0082] S22, collecting data on the current motor speed v1 and rotation angle r1, and performing necessary preprocessing and formatting on the data.

[0083] S23, based on the application of automobile steering scenarios, selects the Kalman filter algorithm as the prediction model, and uses historical data of key variables to train and calibrate the prediction model; among them, the model parameters are optimized through methods such as cross-validation to improve the accuracy and reliability of the prediction.

[0084] S24 , inputting the data of the current motor speed v1 and rotation angle r1 into the prediction model for prediction, and obtaining the predicted speed Ve and predicted rotation angle Re of the motor in the short term.

[0085] In this embodiment, it is specifically explained that step S3 specifically includes:

[0086] S31, collecting the vehicle's current dynamic state data and analyzing the vehicle's kinematic and dynamic characteristics to assess steering requirements; the dynamic state data includes vehicle speed, acceleration, and tire steering angle;

[0087] S32 , analyzing and comparing the predicted rotational speed Ve and steering angle Re with the current dynamic state data of the vehicle, extracting the correlation between the two, and setting a reasonable baseline for the initial steering force;

[0088] A reasonable baseline provides an expected operating level to compare with actual data to determine whether adjustments are needed; the baseline defines the performance that the vehicle's steering system should achieve and is critical to maintaining steering responsiveness and stability.

[0089] S33, calculating the required steering force based on the current dynamic state data of the vehicle using a dynamic model;

[0090] S34, setting maximum and minimum boundary conditions for u0 based on vehicle manufacturing parameters and safety standards, thereby calculating an initial steering force output range;

[0091] The initial steering force output range is calculated using a dynamic model based on the vehicle's actual dynamic data, taking into account factors such as vehicle speed, acceleration, and tire steering angle; this range sets the maximum and minimum values of the initial steering force output u0 to ensure that it does not exceed the vehicle's physical limitations and safety standards.

[0092] S35 , selecting the intersection point of the initial steering force output range and the baseline as the actual value of the initial power output u0.

[0093] When combining the baseline with the initial steering force output range, a value or a small range is sought that meets the expected motor output (baseline) based on the prediction model and is also within the safety range calculated by the dynamic model; this intersection is the actual value of u0 that is ultimately selected, which meets the expectations of the prediction and current state while ensuring the safety and performance of the vehicle.

[0094] In general, in step S35, selecting the intersection point of the baseline and the initial steering force output range as the actual value of the initial power output u0 means finding a compromise point that takes into account the vehicle's expected and actual steering performance and ensures a balance between steering sensitivity and safety.

[0095] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electric vehicle steering integrated control system, characterized in that: The motor assembly (15) comprises a first mounting surface (26) and a second mounting surface (27) arranged opposite to each other; The first mounting surface (26) is provided with a controller assembly (25), the controller assembly (25) comprising a controller housing (7) fixedly connected to the motor assembly (15), a steering controller (12) and a radiator (5) being sequentially mounted in the controller housing (7), the radiator (5) being used to dissipate heat from the steering controller (12) and the motor assembly (15); The second mounting surface (27) is provided with a steering pump (20), and the output shaft (30) of the motor assembly (15) is provided with a transmission adapter (16), one end of the transmission adapter (16) extends into the steering pump (20); the motor assembly (15) operates to drive the transmission adapter (16) to rotate in the steering pump (20); A position sensor (14) is provided on the motor assembly (15), and the position sensor (14) is electrically connected to the steering controller (12); The position sensor (14) is connected to the output shaft (30) of the motor assembly (15), and the position sensor (14) is used to detect the rotation angle of the motor to generate first detection information and transmit it to the steering controller (12); A detection port (35) is provided on a side wall of the steering pump (20), and a pressure sensor (18) is provided at the detection port (35). The pressure sensor (18) is used to detect a pressure value in the steering pump (20) to generate second detection information and transmit the second detection information to the steering controller (12); The control method of the electric vehicle steering integrated control system is: S1, collecting data on the current output shaft rotation speed v1 and rotation angle r1 of the motor assembly (15) from the position sensor (14), and obtaining data on the hydraulic pressure t1 in the steering pump (20) from the pressure sensor (18); S2, using a preset algorithm to predict the output of the motor component within a preset future time to obtain predicted Ve and Re; wherein the preset future time is a short time period; S3, setting an initial steering force output u0 based on the predicted Ve and Re and the current vehicle dynamic state; S4, by comparing the current hydraulic pressure t1 in the steering pump (20) with the initial steering power output u0, when the deviation between the two exceeds a first threshold, formulating a first motor adjustment strategy; S5, adjusting the operation of the motor assembly according to the first motor adjustment strategy, and detecting the hydraulic pressure t2 in the steering pump (20) in real time through the pressure sensor (18), so that the hydraulic pressure t2 and the steering power output u0 are less than a first threshold; S6, using the electric vehicle's recognition system to identify and obtain driving scene information, and adjusting the hydraulic control strategy based on the current driving scene information to adjust the initial steering power output u0 to obtain a dynamically changing Ue; S7, formulating a second motor adjustment strategy based on the difference between the real-time hydraulic pressure t2 and the dynamically changing Ue, and adjusting the operation of the motor assembly using the second motor adjustment strategy; Among them, S2 specifically includes: S21, setting the prediction time range, selecting key variables that affect motor performance, and obtaining historical data of the key variables; the key variables include current speed, rotation angle, and vehicle speed; S22, collecting data on the current motor speed v1 and rotation angle r1, and preprocessing and formatting the data; S23, selects the Kalman filter algorithm as the prediction model based on the vehicle steering scenario application, and uses historical data of key variables to train and calibrate the prediction model; S24 , inputting the data of the current motor speed v1 and rotation angle r1 into the prediction model for prediction, and obtaining the predicted speed Ve and predicted rotation angle Re of the motor in the short term.

2. The electric vehicle steering integrated control system according to claim 1, characterized in that: A mounting boss (28) is provided on one side wall of the controller housing (7), the mounting boss (28) is provided with a mounting channel communicating with the inner cavity of the controller housing (7), and one end of the mounting channel is provided with a mounting opening (29); The mounting openings (29) are provided with a plurality of them, each of which is provided with a high-voltage input connector (10) and a low-voltage control connector (9); the high-voltage input connector (10) and the low-voltage control connector (9) are electrically connected to the steering controller (12) through the mounting channels. An installation window (31) that is in communication with the installation channel is formed on the upper end surface of the installation boss (28), and the installation window (31) is provided with a waterproof cover (8); One end of the waterproof cover (8) extends into the installation channel and is detachably connected to the high-voltage input connector (10) or the low-voltage control connector (9).

3. The electric vehicle steering integrated control system according to claim 2, characterized in that: The position sensor (14) comprises a PCB board (32), an encoder (33) is provided on the PCB board (32), the encoder (33) is connected to a rotating block (34), and the rotating block (34) is circumferentially connected to the output shaft (30) of the motor assembly (15).

4. The electric vehicle steering integrated control system according to claim 1, characterized in that: A mounting bracket (22) is fittedly provided on one side wall of the motor assembly (15), and an anti-vibration component is provided on an end surface of the mounting bracket (22) away from the motor assembly (15); The anti-vibration assembly includes four anti-vibration pads (24), and the four anti-vibration pads (24) are respectively arranged at four corners of the mounting bracket (22).

5. The electric vehicle steering integrated control system according to claim 1, characterized in that: The radiator (5) is a cooling fan, and the cooling fan forms an air flow channel that flows through the steering controller (12) and the motor assembly (15) in sequence; A fan cover (4) is provided at one end of the controller housing (7) away from the motor assembly (15), and a protective cover (2) is provided on one side of the fan cover (4).

6. The electric vehicle steering integrated control system according to claim 1, characterized in that: A positioning groove (36) is provided at one end of the output shaft (30) of the motor assembly (15); The transmission adapter (16) comprises a plug-in portion (37) and a transfer portion (38), wherein the plug-in portion (37) is inserted into the positioning groove (36) and is circumferentially fixedly connected to the output shaft (30) of the motor assembly (15); The adapter portion (38) extends into the steering pump (20), and a sealing ring (17) is provided on the outer shell of the adapter portion (38), and the sealing ring (17) is used to seal the gap space between the adapter portion (38) and the steering pump (20).

7. The electric vehicle steering integrated control system according to claim 1, characterized in that: A waterproof sealing gasket (11) is provided on one end surface of the controller housing (7) close to the motor assembly (15), and the waterproof sealing gasket (11) is used to seal the gap space between the controller housing (7) and the motor assembly (15).

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