A torsional vibration detection method for a hybrid transmission system and related device
By collecting generator speed fluctuation signals in the hybrid transmission to calculate angular acceleration and impact, setting thresholds to detect torsional vibration, and implementing hydraulic torque converters or hydraulic damping to reduce vibration, the problem of inaccurate torsional vibration risk identification in existing technologies is solved, achieving efficient torsional vibration detection and system safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SAIC MOTOR
- Filing Date
- 2024-12-24
- Publication Date
- 2026-06-26
AI Technical Summary
Existing technologies struggle to accurately identify torsional vibration risks in hybrid transmissions. Simulation methods cannot fully cover extreme operating conditions, leading to increased testing costs and low identification accuracy. Furthermore, the inability to identify torsional vibration risks in real time affects the safe operation of the system.
By collecting generator speed fluctuation signals under normal engine operating conditions, calculating angular acceleration and angular acceleration impact, setting thresholds for torsional vibration detection, and implementing post-processing operations of the hydraulic torque converter or hydraulic damping shock absorption unit when an anomaly is detected.
It achieves rapid and accurate torsional vibration risk detection, improves identification accuracy, reduces testing costs, and ensures safe system operation.
Smart Images
Figure CN122282318A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of transmission technology, and in particular to a method and related device for detecting torsional vibration in a hybrid transmission system. Background Technology
[0002] In hybrid transmissions, the drive system (i.e., the transmission system) that powers the engine and generator bears high-intensity impact loads during operation. Torsional vibration (i.e., torsional vibration) of the transmission system refers to a vibration phenomenon in which periodic torsional vibrations occur between transmission components, and it is one of the important factors affecting the safe operation of the system.
[0003] Currently, simulation is the primary method for assessing and predicting torsional vibration risks in transmission systems. However, the accuracy of the model relies on precise structural dimensional parameters of the transmission system. Furthermore, defining and debugging the model's boundaries, especially considering potential design changes, can lead to lengthy iterative calculation cycles, making it difficult to fully adapt to development progress. Limited by experimental resources and capabilities, simulation methods cannot fully cover extreme operating conditions, and design changes can cause repeated experimental verification, increasing testing costs and failing to completely identify torsional vibration risks, thus affecting accuracy. Additionally, since simulation is an offline solution, it cannot identify torsional vibration risks online in real time. Once a risk occurs, it can only be addressed by restricting hardware use; if not handled promptly, parts may fail, causing the vehicle to lose power. Summary of the Invention
[0004] In view of the above problems, this application provides a method and related device for detecting torsional vibration in a hybrid transmission system, so as to accurately detect the torsional vibration risk of the transmission system. The specific solution is as follows:
[0005] The first aspect of this application provides a method for detecting torsional vibration in a hybrid transmission system, the method comprising:
[0006] Under normal engine operating conditions, the generator speed fluctuation signal is collected;
[0007] The angular acceleration fluctuation signal of the generator is calculated based on the rotational speed fluctuation signal, and the maximum value in the angular acceleration fluctuation signal is taken as the first maximum instantaneous angular acceleration;
[0008] The angular acceleration impact signal of the generator is calculated based on the angular acceleration fluctuation signal, and the maximum value in the angular acceleration impact signal is taken as the first maximum instantaneous impact.
[0009] Abnormal torsional vibration detection of the transmission system is performed based on the first maximum instantaneous angular acceleration and the first maximum instantaneous impact.
[0010] In one possible implementation, the abnormal torsional vibration detection of the transmission system based on the first maximum instantaneous angular acceleration and the first maximum instantaneous impact includes:
[0011] Obtain the first compensation coefficient for compensating for rotational speed shock, the initial maximum instantaneous angular acceleration under the normal operating conditions, and the second maximum instantaneous angular acceleration allowed by the rotating shaft;
[0012] Calculate the first product of the first compensation coefficient and the initial maximum instantaneous angular acceleration, and take the minimum value between the first product and the second maximum instantaneous angular acceleration as the maximum instantaneous angular acceleration threshold;
[0013] Obtain the second compensation coefficient for compensating for torque impact, the initial maximum instantaneous impact under normal operating conditions, and the second maximum instantaneous impact allowed by the rotating shaft;
[0014] Calculate the second product of the second compensation coefficient and the initial maximum instantaneous impact, and take the minimum value between the second product and the second maximum instantaneous impact as the maximum instantaneous impact threshold;
[0015] Compare the first maximum instantaneous angular acceleration with the maximum instantaneous angular acceleration threshold, and the first maximum instantaneous impact quantity with the maximum instantaneous impact quantity threshold;
[0016] If the first maximum instantaneous angular acceleration is less than the maximum instantaneous angular acceleration threshold and the first maximum instantaneous impact is less than the maximum instantaneous impact threshold, it is determined that the transmission system does not have abnormal torsional vibration.
[0017] If the first maximum instantaneous angular acceleration is greater than or equal to the maximum instantaneous angular acceleration threshold, or the first maximum instantaneous impact is greater than or equal to the maximum instantaneous impact threshold, it is determined that the transmission system has abnormal torsional vibration.
[0018] In one possible implementation, the torsional vibration detection method for the hybrid transmission system further includes:
[0019] If abnormal torsional vibration is detected in the transmission system, post-processing operations for vibration reduction are performed.
[0020] In one possible implementation, the shock absorber in the transmission system uses a hydraulic torque converter, and the post-processing operations for shock absorption include:
[0021] The pressure difference between the lock-up oil circuit and the torque converter oil circuit of the hydraulic torque converter is controlled to be less than zero, so as to release the hydraulic torque converter.
[0022] In one possible implementation, the transmission system is augmented with a hydraulic damping unit, which includes a hydraulic damper and a hydraulic damping active adjustment valve. The hydraulic damper's extruded hydraulic fluid enters the hydraulic damping active adjustment valve. The post-processing operation for damping includes:
[0023] The damping pressure of the hydraulic shock absorber is adjusted by regulating the oil flow rate of the hydraulic damping active regulating valve through the control of the current.
[0024] A second aspect of this application provides a torsional vibration detection device for a hybrid transmission system, the torsional vibration detection device for the hybrid transmission system comprising:
[0025] The speed acquisition module is used to acquire the generator speed fluctuation signal when the engine is under normal operating conditions.
[0026] The torsional vibration detection module is used to calculate the angular acceleration fluctuation signal of the generator based on the rotational speed fluctuation signal, and take the maximum value of the angular acceleration fluctuation signal as the first maximum instantaneous angular acceleration; calculate the angular acceleration impact signal of the generator based on the angular acceleration fluctuation signal, and take the maximum value of the angular acceleration impact signal as the first maximum instantaneous impact; and perform abnormal torsional vibration detection on the transmission system based on the first maximum instantaneous angular acceleration and the first maximum instantaneous impact.
[0027] In one possible implementation, the torsional vibration detection module for detecting abnormal torsional vibration of the transmission system based on the first maximum instantaneous angular acceleration and the first maximum instantaneous impact magnitude is specifically used for:
[0028] Obtain a first compensation coefficient for compensating for rotational speed shock, the initial maximum instantaneous angular acceleration under normal operating conditions, and the second maximum instantaneous angular acceleration allowed by the rotating shaft; calculate a first product of the first compensation coefficient and the initial maximum instantaneous angular acceleration, and take the minimum value between the first product and the second maximum instantaneous angular acceleration as the maximum instantaneous angular acceleration threshold; obtain a second compensation coefficient for compensating for torque shock, the initial maximum instantaneous shock amount under normal operating conditions, and the second maximum instantaneous shock amount allowed by the rotating shaft; calculate a second product of the second compensation coefficient and the initial maximum instantaneous shock amount, and take the minimum value between the second product and the second maximum instantaneous angular acceleration threshold. The minimum value among the maximum instantaneous impact quantities is used as the maximum instantaneous impact quantity threshold; the first maximum instantaneous angular acceleration is compared with the maximum instantaneous angular acceleration threshold, and the first maximum instantaneous impact quantity is compared with the maximum instantaneous impact quantity threshold; if the first maximum instantaneous angular acceleration is less than the maximum instantaneous angular acceleration threshold and the first maximum instantaneous impact quantity is less than the maximum instantaneous impact quantity threshold, it is determined that the transmission system does not have abnormal torsional vibration; if the first maximum instantaneous angular acceleration is greater than or equal to the maximum instantaneous angular acceleration threshold, or the first maximum instantaneous impact quantity is greater than or equal to the maximum instantaneous impact quantity threshold, it is determined that the transmission system has abnormal torsional vibration.
[0029] A third aspect of this application provides a computer program product including computer-readable instructions that, when executed on an electronic device, cause the electronic device to implement the torsional vibration detection method for a hybrid transmission system described in the first aspect or any implementation thereof.
[0030] A fourth aspect of this application provides an electronic device, including at least one processor and a memory connected to the processor, wherein:
[0031] The memory is used to store computer programs;
[0032] The processor is used to execute the computer program so that the electronic device can implement the torsional vibration detection method of the hybrid transmission system of the first aspect or any implementation thereof.
[0033] The fifth aspect of this application provides a computer storage medium carrying one or more computer programs, which, when executed by an electronic device, enable the electronic device to implement the torsional vibration detection method for a hybrid transmission system described in the first aspect or any implementation thereof.
[0034] By employing the above technical solution, this application provides a method and related device for detecting torsional vibration in a hybrid transmission system. Under normal engine operating conditions, the method collects the generator's speed fluctuation signal; calculates the generator's angular acceleration fluctuation signal based on the speed fluctuation signal, and uses the maximum value of the angular acceleration fluctuation signal as the first maximum instantaneous angular acceleration; calculates the generator's angular acceleration impact signal based on the angular acceleration fluctuation signal, and uses the maximum value of the angular acceleration impact signal as the first maximum instantaneous impact; and performs abnormal torsional vibration detection on the transmission system based on the first maximum instantaneous angular acceleration and the first maximum instantaneous impact. This application identifies instantaneous speed impact risk through angular acceleration fluctuation and instantaneous torque impact risk through angular acceleration impact, thereby enabling rapid and accurate detection of torsional vibration risk in the transmission system and improving detection accuracy. Attached Figure Description
[0035] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.
[0036] Figure 1 A schematic flowchart illustrating a torsional vibration detection method for a hybrid transmission system provided in this application embodiment;
[0037] Figure 2 A partial flowchart illustrating a torsional vibration detection method for a hybrid transmission system provided in this application embodiment;
[0038] Figure 3 Another schematic flowchart of a torsional vibration detection method for a hybrid transmission system provided in this application embodiment;
[0039] Figure 4 This is a schematic diagram of a hydraulic active damping structure provided in an embodiment of this application;
[0040] Figure 5 This is a schematic diagram of another hydraulic active damping structure provided in an embodiment of this application;
[0041] Figure 6 The hydraulic damping active regulating valve provided in this application provides hydraulic shock absorption damping torque characteristic curves under different currents;
[0042] Figure 7 A schematic diagram of the structure of a torsional vibration detection device for a hybrid transmission system provided in this application embodiment;
[0043] Figure 8 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation
[0044] The embodiments of this application are described below with reference to the accompanying drawings. The terminology used in the implementation section of this application is for explaining specific embodiments only and is not intended to limit the scope of this application.
[0045] The embodiments of this application will now be described with reference to the accompanying drawings. Those skilled in the art will recognize that, with technological advancements and the emergence of new scenarios, the technical solutions provided in the embodiments of this application are equally applicable to similar technical problems.
[0046] The terms "first," "second," etc., used in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms are interchangeable where appropriate; this is merely a way of distinguishing objects with the same attributes in the embodiments of this application. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, so that a process, method, system, product, or apparatus that comprises a series of units is not necessarily limited to those units, but may include other units not explicitly listed or inherent to those processes, methods, products, or apparatuses.
[0047] See Figure 1 , Figure 1 This is a schematic flowchart illustrating a torsional vibration detection method for a hybrid transmission system provided in an embodiment of this application. Figure 1 As shown in the embodiment of this application, a method for detecting torsional vibration in a hybrid transmission system may include steps S10 to S40, which are described in detail below.
[0048] S10 collects the generator speed fluctuation signal when the engine is in normal operating condition.
[0049] In this embodiment, the normal operating condition of the engine refers to the operating condition of the hybrid system that requires engine participation, excluding pure electric operation, and satisfies the normal engine start-up process, stable operation process, and normal shutdown process. Starting from the engine start-up moment (e.g., the engine speed begins to be higher than 20 rpm) and ending from the engine shutdown moment (e.g., the engine speed begins to be lower than 20 rpm), the engine and generator speeds will always maintain a certain linkage during engine start-up, shutdown, and stable operation, that is, the generator speed will be matched and controlled accordingly.
[0050] During this process, the real-time speed of the generator is sampled at the current sampling frequency to obtain the generator speed fluctuation signal.
[0051] S20, calculate the generator's angular acceleration fluctuation signal based on the speed fluctuation signal, and take the maximum value in the angular acceleration fluctuation signal as the first maximum instantaneous angular acceleration.
[0052] In this embodiment of the application, differential operation is performed on the speed fluctuation signal to obtain an angular acceleration fluctuation signal that characterizes the generator angular acceleration. The angular acceleration fluctuation represents the instantaneous speed impact risk. The maximum value in the angular acceleration fluctuation signal is determined and taken as the first maximum instantaneous angular acceleration.
[0053] S30, calculate the generator's angular acceleration impact signal based on the angular acceleration fluctuation signal, and take the maximum value in the angular acceleration impact signal as the first maximum instantaneous impact.
[0054] In this embodiment of the application, differential operation is performed on the angular acceleration fluctuation signal to obtain the angular acceleration impact signal characterizing the generator. The angular acceleration impact signal represents the instantaneous torque impact risk. The maximum value in the angular acceleration impact signal is determined and used as the first maximum instantaneous impact.
[0055] S40, abnormal torsional vibration detection of the transmission system is performed based on the first maximum instantaneous angular acceleration and the first maximum instantaneous impact.
[0056] In this embodiment of the application, the transmission system is judged to have abnormal torsional vibration based on the first maximum instantaneous angular acceleration and the first maximum instantaneous impact, combined with a threshold value, so as to detect the risk of torsional vibration.
[0057] See Figure 2 , Figure 2 This is a partial flowchart illustrating a torsional vibration detection method for a hybrid transmission system provided in an embodiment of this application. Figure 2 As shown in the embodiment of this application, a method for detecting torsional vibration in a hybrid transmission system is provided. Step S40, "detecting abnormal torsional vibration in the transmission system based on the first maximum instantaneous angular acceleration and the first maximum instantaneous impact," may include steps S401 to S407. These steps are described in detail below.
[0058] S401, obtain the first compensation coefficient for compensating for rotational speed shock, the initial maximum instantaneous angular acceleration under normal operating conditions, and the second maximum instantaneous angular acceleration allowed by the rotating shaft.
[0059] In this embodiment of the application, the first compensation coefficient k1 used to compensate for rotational speed impact, the initial maximum instantaneous angular acceleration α0 under normal operating conditions, and the second maximum instantaneous angular acceleration αm allowed by the rotating shaft are obtained.
[0060] S402, calculate the first product of the first compensation coefficient and the initial maximum instantaneous angular acceleration, and take the minimum value between the first product and the second maximum instantaneous angular acceleration as the maximum instantaneous angular acceleration threshold.
[0061] In this embodiment of the application, the first product k1×α0 of the first compensation coefficient k1 and the initial maximum instantaneous angular acceleration α0 is calculated, and the first product k1×α0 is compared with the second maximum instantaneous angular acceleration αm. The minimum value min(k1×α0, αm) is used as the maximum instantaneous angular acceleration threshold.
[0062] S403, obtain the second compensation coefficient for compensating for torque shock, the initial maximum instantaneous shock under normal operating conditions, and the second maximum instantaneous shock allowed by the rotating shaft.
[0063] In this embodiment of the application, the second compensation coefficient k2 for compensating for torque impact, the initial maximum instantaneous impact amount β0 under normal operating conditions, and the second maximum instantaneous impact amount βn allowed by the rotating shaft are obtained.
[0064] S404, calculate the second product of the second compensation coefficient and the initial maximum instantaneous impact, and take the minimum value between the second product and the second maximum instantaneous impact as the maximum instantaneous impact threshold.
[0065] In this embodiment of the application, the second product k2×β0 of the second compensation coefficient k2 and the initial maximum instantaneous impact β0 is calculated, and the second product k2×β0 is compared with the second maximum instantaneous impact βn. The minimum value min(k2×β0, βn) is taken as the maximum instantaneous impact threshold.
[0066] It should be noted that the initial maximum instantaneous angular acceleration α0, the second maximum instantaneous angular acceleration αm, the initial maximum instantaneous impact β0, and the second maximum instantaneous impact βn are all closely related to the material and structural parameters of the transmission system. These parameters can be obtained in actual testing by simulating the normal operating conditions of the transmission system and its maximum torsional capacity. To minimize errors, the average of multiple tests can be taken to ensure accuracy. By simulating the normal operating conditions and torsional vibration conditions of the transmission system (which can be worsened by modifying the engine or generator control strategy), the first compensation coefficient k1 and the second compensation coefficient k2 for the torsional vibration conditions and normal operating conditions are confirmed through data fitting obtained from tests.
[0067] S405, compare the first maximum instantaneous angular acceleration with the maximum instantaneous angular acceleration threshold, and the first maximum instantaneous impact quantity with the maximum instantaneous impact quantity threshold.
[0068] In this embodiment of the application, it is assumed that the first maximum instantaneous angular acceleration is α and the first maximum instantaneous impact is β. The first maximum instantaneous angular acceleration α is compared with the maximum instantaneous angular acceleration threshold min(k1×α0, αm) and the first maximum instantaneous impact is compared with the maximum instantaneous impact threshold min(k2×β0, βn).
[0069] S406, if the first maximum instantaneous angular acceleration is less than the maximum instantaneous angular acceleration threshold and the first maximum instantaneous impact is less than the maximum instantaneous impact threshold, it is determined that there is no abnormal torsional vibration in the transmission system.
[0070] In this embodiment of the application, if the first maximum instantaneous angular acceleration α is less than the maximum instantaneous angular acceleration threshold min(k1×α0, αm) and the first maximum instantaneous impact β is less than the maximum instantaneous impact threshold min(k2×β0, βn), then it is determined that the transmission system is in normal operation and there is no abnormal torsional vibration.
[0071] S407, if the first maximum instantaneous angular acceleration is greater than or equal to the maximum instantaneous angular acceleration threshold, or the first maximum instantaneous impact is greater than or equal to the maximum instantaneous impact threshold, it is determined that there is abnormal torsional vibration in the transmission system.
[0072] In this embodiment of the application, if the first maximum instantaneous angular acceleration α is greater than or equal to the maximum instantaneous angular acceleration threshold min(k1×α0, αm), or the first maximum instantaneous impact β is greater than or equal to the maximum instantaneous impact threshold min(k2×β0, βn), that is, any one or both of the first maximum instantaneous angular acceleration α and the first maximum instantaneous impact β are not less than the corresponding threshold, then it is determined that there is an abnormal torsional vibration risk in the transmission system.
[0073] Based on this, prompts can be sent and output to the control terminal. If the first maximum instantaneous angular acceleration α is greater than or equal to the maximum instantaneous angular acceleration threshold min(k1×α0, αm), and the first maximum instantaneous impact β is less than the maximum instantaneous impact threshold min(k2×β0, βn), a speed control improvement scheme can be implemented as needed. If the first maximum instantaneous angular acceleration α is less than the maximum instantaneous angular acceleration threshold min(k1×α0, αm), and the first maximum instantaneous impact β is greater than or equal to the maximum instantaneous impact threshold min(k2×β0, βn), a torque control improvement scheme can be implemented as needed. If the first maximum instantaneous angular acceleration α is greater than or equal to the maximum instantaneous angular acceleration threshold min(k1×α0, αm), and the first maximum instantaneous impact β is greater than or equal to the maximum instantaneous impact threshold min(k2×β0, βn), a speed and torque control improvement scheme can be implemented as needed.
[0074] See Figure 3 , Figure 3This is another schematic flowchart illustrating a torsional vibration detection method for a hybrid transmission system provided in an embodiment of this application. Figure 3 As shown in the embodiment of this application, a method for detecting torsional vibration in a hybrid transmission system further includes step S50, which will be described in detail below.
[0075] S50 performs post-processing operations for vibration reduction when abnormal torsional vibration is detected in the transmission system.
[0076] In this embodiment of the application, when it is determined that there is abnormal torsional vibration in the transmission system, a post-processing operation for vibration reduction can be performed. This post-processing operation includes adjusting the generator or engine control strategy to improve speed and / or torque shock.
[0077] For shock absorption systems, the currently commonly used mechanical shock absorbers (i.e., spring-mass mechanical shock absorbers) have insufficient damping control capabilities. In development practice, they often encounter problems such as excessive torsional vibration, resonance, and high noise, increasing control difficulty, affecting driving experience, and posing a challenge to the strength of systems such as gear shafts. To solve this problem, the post-processing operation in this application embodiment includes activating a hydraulic active damping mode. In this regard, this application embodiment provides several active damping solutions to improve impact.
[0078] See Figure 4 , Figure 4 This is a schematic diagram of a hydraulic active damping structure provided in an embodiment of this application. Figure 4 As shown in the embodiments of this application, a hydraulic torque converter A-1 is arranged in the transmission system to replace the existing spring-mass mechanical damper (such as a dual-mass flywheel or torsion-limiting damper structure). In this regard, the embodiments of this application provide a torsional vibration detection method for a hybrid transmission system, wherein the "performing post-processing operation for vibration reduction" in step S50 above can be performed as follows:
[0079] The pressure difference between the lock-up oil circuit and the torque converter oil circuit of the hydraulic torque converter is kept less than zero in order to release the hydraulic torque converter.
[0080] In this embodiment, the hydraulic transmission A-1 has a lock-up oil circuit LU (full name: Lock Up) and a torque converter TC. When the engine requires efficient transmission, the pressure difference between the lock-up oil circuit LU and the torque converter TC can be adjusted to be greater than zero by the pressure sensor A-2 on the lock-up oil circuit LU side and the pressure sensor A-3 on the torque converter TC side to lock the hydraulic torque converter A-1 and reduce hydraulic losses. When a risk of torsional vibration is detected in the transmission system, the pressure difference between the lock-up oil circuit LU and the torque converter TC can be adjusted to be less than zero to quickly release the lock-up hydraulic torque converter A-1. The transmission system enters a hydraulic damping state, thereby effectively utilizing the characteristic that the faster the fluid rate changes, the greater the flow resistance to achieve hydraulic variable damping buffering.
[0081] See Figure 5 , Figure 5 This is a schematic diagram of another hydraulic active damping structure provided in an embodiment of this application. Figure 5 As shown in the embodiment of this application, a hydraulic damping damping unit is added to the existing spring-mass mechanical shock absorber, and the damping magnitude can be actively adjusted. This hydraulic damping damping unit includes a hydraulic shock absorber B-1 and a hydraulic damping active adjustment valve B-2. The hydraulic shock absorber B-1 draws its oil from the cooling and lubrication damping circuit of the hydraulic system, ensuring that each chamber of the hydraulic shock absorber B-1 is always filled with hydraulic oil. Damping pressure is generated by the compression of the oil between the input and output ends inside the hydraulic shock absorber B-1. The compressed oil exits the hydraulic shock absorber B-1 and enters the hydraulic damping active adjustment valve B-2, then enters the outlet oil circuit. The damping pressure is adjusted by regulating the oil flow rate through the hydraulic damping active adjustment valve B-2, thereby adjusting the damping magnitude of the hydraulic shock absorber. (Continue to see...) Figure 5 Three check valves are arranged between the input end of the hydraulic shock absorber B-1 and the oil inlet circuit, and two check valves are arranged between the input end and the output end of the hydraulic shock absorber B-1. In this regard, the torsional vibration detection method for a hybrid transmission system provided in this application embodiment, wherein the "performing post-processing operations for vibration damping" in step S50 above can be performed as follows:
[0082] The damping pressure of the hydraulic shock absorber is adjusted by regulating the oil flow speed of the hydraulic damping active regulating valve through the adjustment of the current.
[0083] In this embodiment, the opening degree of the hydraulic damping active regulating valve C can be adjusted by regulating the hydraulic flow rate of the valve, thereby adjusting the damping magnitude of the hydraulic shock absorber B. Of course, the hydraulic damping active regulating valve C can also be arranged in a conventional hydraulic valve body module. Through the hydraulic damping shock absorber unit, compatibility with conventional hybrid system hydraulic actuation, cooling, and lubrication systems can be easily achieved, resulting in low integration cost and simple placement. See also Figure 6 , Figure 6The hydraulic damping active regulating valve provided in this application has hydraulic damping damping torque characteristic curves under different currents. For example... Figure 6 As shown, by adjusting the current of the hydraulic damping active regulating valve C, hydraulic damping torque characteristic curves with different soft and hard characteristics can be obtained.
[0084] Based on the above description, the torsional vibration detection method for a hybrid transmission system provided in this application identifies instantaneous speed impact risk through angular acceleration fluctuations and instantaneous torque impact risk through angular acceleration impact magnitude. This allows for rapid and accurate detection of torsional vibration risks in the transmission system, thereby improving detection accuracy.
[0085] The above describes a method for detecting torsional vibration in a hybrid transmission system according to an embodiment of this application. The following describes the apparatus for performing the above-described method for detecting torsional vibration in a hybrid transmission system.
[0086] See Figure 7 , Figure 7 This is a schematic diagram of the structure of a torsional vibration detection device for a hybrid transmission system provided in an embodiment of this application. Figure 7 As shown in the embodiment of this application, a torsional vibration detection device for a hybrid transmission system includes:
[0087] The speed acquisition module 10 is used to acquire the speed fluctuation signal of the generator when the engine is in normal operating condition;
[0088] The torsional vibration detection module 20 is used to calculate the angular acceleration fluctuation signal of the generator based on the speed fluctuation signal, and take the maximum value of the angular acceleration fluctuation signal as the first maximum instantaneous angular acceleration; calculate the angular acceleration impact signal of the generator based on the angular acceleration fluctuation signal, and take the maximum value of the angular acceleration impact signal as the first maximum instantaneous impact; and perform abnormal torsional vibration detection on the transmission system based on the first maximum instantaneous angular acceleration and the first maximum instantaneous impact.
[0089] In one possible implementation, the torsional vibration detection module 20, used to detect abnormal torsional vibration of the transmission system based on the first maximum instantaneous angular acceleration and the first maximum instantaneous impact, is specifically used for:
[0090] Obtain the first compensation coefficient for compensating for speed shock, the initial maximum instantaneous angular acceleration under normal operating conditions, and the second maximum instantaneous angular acceleration allowed by the rotating shaft; calculate the first product of the first compensation coefficient and the initial maximum instantaneous angular acceleration, and take the minimum value between the first product and the second maximum instantaneous angular acceleration as the maximum instantaneous angular acceleration threshold; obtain the second compensation coefficient for compensating for torque shock, the initial maximum instantaneous shock amount under normal operating conditions, and the second maximum instantaneous shock amount allowed by the rotating shaft; calculate the second product of the second compensation coefficient and the initial maximum instantaneous shock amount, and take the second product... The minimum of the first maximum instantaneous impact value and the second maximum instantaneous impact value is used as the maximum instantaneous impact value threshold. The first maximum instantaneous angular acceleration is compared with the maximum instantaneous angular acceleration threshold, and the first maximum instantaneous impact value is compared with the maximum instantaneous impact value threshold. If the first maximum instantaneous angular acceleration is less than the maximum instantaneous angular acceleration threshold and the first maximum instantaneous impact value is less than the maximum instantaneous impact value threshold, it is determined that there is no abnormal torsional vibration in the transmission system. If the first maximum instantaneous angular acceleration is greater than or equal to the maximum instantaneous angular acceleration threshold, or the first maximum instantaneous impact value is greater than or equal to the maximum instantaneous impact value threshold, it is determined that there is abnormal torsional vibration in the transmission system.
[0091] In one possible implementation, the torsional vibration detection module 20 is also used for:
[0092] If abnormal torsional vibration is detected in the transmission system, post-processing operations for vibration reduction are performed.
[0093] In one possible implementation, the shock absorber in the transmission system uses a hydraulic torque converter for a torsional vibration detection module 20 that performs post-processing operations for damping, specifically for:
[0094] The pressure difference between the lock-up oil circuit and the torque converter oil circuit of the hydraulic torque converter is kept less than zero in order to release the hydraulic torque converter.
[0095] In one possible implementation, a hydraulic damping damping unit is added to the transmission system. This unit includes a hydraulic damper and a hydraulic damping active adjustment valve. The extruded hydraulic fluid from the damper enters the hydraulic damping active adjustment valve, which is used to perform a torsional vibration detection module 20 for post-processing operations related to damping. Specifically, this module is used for:
[0096] The damping pressure of the hydraulic shock absorber is adjusted by regulating the oil flow speed of the hydraulic damping active regulating valve through the adjustment of the current.
[0097] It should be noted that the detailed functions of each module in the embodiments of this application can be found in the corresponding disclosure of the above-mentioned embodiment of the torsional vibration detection method for hybrid transmission system, and will not be repeated here.
[0098] This application also provides an electronic device in its embodiments. See also... Figure 8 , Figure 8This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Figure 8 As shown, the electronic device provided in this application embodiment includes at least one memory 1, a processor 2, a motor speed sensor 3, at least one communication interface 4, and an optional user interface 5.
[0099] Memory 1 is used to store computer programs, including but not limited to computer program code, operation instructions, and other interface modules. It can be a volatile memory (random access memory, dynamic random access memory, or static random access memory) or a non-volatile memory (read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, or flash memory). Processor 2 is used to execute the application program instructions in memory 1 to realize torsional vibration detection. When the engine is in normal operating condition, it collects the generator speed fluctuation signal through motor speed sensor 3, and calculates the first maximum instantaneous angular acceleration and the first maximum instantaneous impact amount from the acquired signals. Based on these two, it performs abnormal torsional vibration detection on the transmission system. It can be a central control unit (CPU) or other general-purpose control units such as DSP, ASIC, etc. Communication interface 4 is used to realize network communication between memory 1, processor 2, speed sensor 3, and user interface 5. It can be an external communication interface or an internal communication interface. User interface 5 is used to interact with external users and can include a display, operating console, data cable, etc.
[0100] This application also provides a computer program product including computer-readable instructions, which, when executed on an electronic device, cause the electronic device to implement any of the torsional vibration detection methods for hybrid transmission systems provided in this application.
[0101] This application also provides a computer-readable storage medium carrying one or more computer programs. When the one or more computer programs are executed by an electronic device, the electronic device can implement any of the torsional vibration detection methods for hybrid transmission systems provided in this application.
[0102] It should also be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. In addition, in the device embodiment drawings provided in this application, the connection relationship between modules indicates that they have a communication connection, which can be implemented as one or more communication buses or signal lines.
[0103] Through the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general-purpose hardware, or it can be implemented by special-purpose hardware including application-specific integrated circuits, special-purpose CPUs, special-purpose memory, special-purpose components, etc. Generally, any function performed by a computer program can be easily implemented by corresponding hardware, and the specific hardware structure used to implement the same function can also be diverse, such as analog circuits, digital circuits, or special-purpose circuits. However, for this application, software program implementation is more often the preferred implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a readable storage medium, such as a computer floppy disk, USB flash drive, mobile hard disk, ROM, RAM, magnetic disk, or optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, training equipment, or network device, etc.) to execute the methods described in the various embodiments of this application.
[0104] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product.
[0105] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, training device, or data center to another website, computer, training device, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a training device or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state drives (SSDs)).
Claims
1. A method for detecting torsional vibration in a hybrid transmission system, characterized in that, The torsional vibration detection method for the hybrid transmission system includes: Under normal engine operating conditions, the generator speed fluctuation signal is collected; The angular acceleration fluctuation signal of the generator is calculated based on the rotational speed fluctuation signal, and the maximum value in the angular acceleration fluctuation signal is taken as the first maximum instantaneous angular acceleration; The angular acceleration impact signal of the generator is calculated based on the angular acceleration fluctuation signal, and the maximum value in the angular acceleration impact signal is taken as the first maximum instantaneous impact. Abnormal torsional vibration detection of the transmission system is performed based on the first maximum instantaneous angular acceleration and the first maximum instantaneous impact.
2. The method for detecting torsional vibration in a hybrid transmission system according to claim 1, characterized in that, The abnormal torsional vibration detection of the transmission system based on the first maximum instantaneous angular acceleration and the first maximum instantaneous impact includes: Obtain the first compensation coefficient for compensating for rotational speed shock, the initial maximum instantaneous angular acceleration under the normal operating conditions, and the second maximum instantaneous angular acceleration allowed by the rotating shaft; Calculate the first product of the first compensation coefficient and the initial maximum instantaneous angular acceleration, and take the minimum value between the first product and the second maximum instantaneous angular acceleration as the maximum instantaneous angular acceleration threshold; Obtain the second compensation coefficient for compensating for torque impact, the initial maximum instantaneous impact under normal operating conditions, and the second maximum instantaneous impact allowed by the rotating shaft; Calculate the second product of the second compensation coefficient and the initial maximum instantaneous impact, and take the minimum value between the second product and the second maximum instantaneous impact as the maximum instantaneous impact threshold; Compare the first maximum instantaneous angular acceleration with the maximum instantaneous angular acceleration threshold, and the first maximum instantaneous impact quantity with the maximum instantaneous impact quantity threshold; If the first maximum instantaneous angular acceleration is less than the maximum instantaneous angular acceleration threshold and the first maximum instantaneous impact is less than the maximum instantaneous impact threshold, it is determined that the transmission system does not have abnormal torsional vibration. If the first maximum instantaneous angular acceleration is greater than or equal to the maximum instantaneous angular acceleration threshold, or the first maximum instantaneous impact is greater than or equal to the maximum instantaneous impact threshold, it is determined that the transmission system has abnormal torsional vibration.
3. The method for detecting torsional vibration in a hybrid transmission system according to claim 1, characterized in that, The torsional vibration detection method for the hybrid transmission system also includes: If abnormal torsional vibration is detected in the transmission system, post-processing operations for vibration reduction are performed.
4. The torsional vibration detection method for a hybrid transmission system according to claim 3, characterized in that, The shock absorber in the transmission system uses a hydraulic torque converter, and the post-processing operations for shock absorption include: The pressure difference between the lock-up oil circuit and the torque converter oil circuit of the hydraulic torque converter is controlled to be less than zero, so as to release the hydraulic torque converter.
5. The method for detecting torsional vibration in a hybrid transmission system according to claim 3, characterized in that, The transmission system is augmented with a hydraulic damping shock absorber unit, which includes a hydraulic shock absorber and a hydraulic damping active adjustment valve. The hydraulic shock absorber's extruded hydraulic fluid enters the hydraulic damping active adjustment valve. The post-processing operation for shock absorption includes: The damping pressure of the hydraulic shock absorber is adjusted by regulating the oil flow rate of the hydraulic damping active regulating valve through the control of the current.
6. A torsional vibration detection device for a hybrid transmission system, characterized in that, The torsional vibration detection device for the hybrid transmission system includes: The speed acquisition module is used to acquire the generator speed fluctuation signal when the engine is under normal operating conditions. The torsional vibration detection module is used to calculate the angular acceleration fluctuation signal of the generator based on the rotational speed fluctuation signal, and take the maximum value of the angular acceleration fluctuation signal as the first maximum instantaneous angular acceleration; calculate the angular acceleration impact signal of the generator based on the angular acceleration fluctuation signal, and take the maximum value of the angular acceleration impact signal as the first maximum instantaneous impact; and perform abnormal torsional vibration detection on the transmission system based on the first maximum instantaneous angular acceleration and the first maximum instantaneous impact.
7. The torsional vibration detection device for a hybrid transmission system according to claim 6, characterized in that, A torsional vibration detection module for detecting abnormal torsional vibration in a transmission system based on the first maximum instantaneous angular acceleration and the first maximum instantaneous impact magnitude, specifically used for: Obtain a first compensation coefficient for compensating for rotational speed shock, the initial maximum instantaneous angular acceleration under normal operating conditions, and the second maximum instantaneous angular acceleration allowed by the rotating shaft; calculate a first product of the first compensation coefficient and the initial maximum instantaneous angular acceleration, and take the minimum value between the first product and the second maximum instantaneous angular acceleration as the maximum instantaneous angular acceleration threshold; obtain a second compensation coefficient for compensating for torque shock, the initial maximum instantaneous shock amount under normal operating conditions, and the second maximum instantaneous shock amount allowed by the rotating shaft; calculate a second product of the second compensation coefficient and the initial maximum instantaneous shock amount, and take the minimum value between the second product and the second maximum instantaneous angular acceleration threshold. The minimum value among the maximum instantaneous impact quantities is used as the maximum instantaneous impact quantity threshold; the first maximum instantaneous angular acceleration is compared with the maximum instantaneous angular acceleration threshold, and the first maximum instantaneous impact quantity is compared with the maximum instantaneous impact quantity threshold; if the first maximum instantaneous angular acceleration is less than the maximum instantaneous angular acceleration threshold and the first maximum instantaneous impact quantity is less than the maximum instantaneous impact quantity threshold, it is determined that the transmission system does not have abnormal torsional vibration; if the first maximum instantaneous angular acceleration is greater than or equal to the maximum instantaneous angular acceleration threshold, or the first maximum instantaneous impact quantity is greater than or equal to the maximum instantaneous impact quantity threshold, it is determined that the transmission system has abnormal torsional vibration.
8. A computer program product, characterized in that, It includes computer-readable instructions that, when executed on an electronic device, cause the electronic device to implement the torsional vibration detection method for a hybrid transmission system as described in any one of claims 1 to 5.
9. An electronic device, characterized in that, It includes at least one processor and a memory connected to the processor, wherein: The memory is used to store computer programs; The processor is used to execute the computer program so that the electronic device can implement the torsional vibration detection method for a hybrid transmission system as described in any one of claims 1 to 5.
10. A computer storage medium, characterized in that, The storage medium carries one or more computer programs that, when executed by an electronic device, enable the electronic device to implement the torsional vibration detection method for a hybrid transmission system as described in any one of claims 1 to 5.