Design method and device for boom of fire fighting truck, electronic equipment and storage medium

Abstract

The invention provides a fire fighting truck boom design method and device, electronic equipment and a storage medium. The method comprises the following steps: establishing a multidisciplinary joint simulation model; setting an initial design variable set; generating multiple groups of first design variable combinations based on a preset test design method; comparing each group of first design variable combinations with an allowable error range of a corresponding to-be-selected parameter in a to-be-selected parameter library, and screening out multiple groups of second design variable combinations; inputting each group of second design variable combinations into a simulation model, simulating hydraulic parameter change through a hydraulic system simulation module, calculating boom dynamic response through a mechanical dynamics simulation module, and obtaining boom linear velocity fluctuation amplitude of each group of second design variable combinations; according to the method, the shaking conditions of the boom under different working conditions and different design variables can be obtained without actual tests, the optimal parameters are determined, a theoretical basis is provided for model selection and design of the boom of the fire fighting truck, the development cost of the fire fighting truck is saved, and the development period is shortened.

Description

Technical Field

[0001] This invention relates to the field of fire truck engineering technology, and in particular to a design method, device, electronic equipment and storage medium for a fire truck boom. Background Technology

[0002] As the core actuator in firefighting and rescue operations, the dynamic stability of a fire truck's boom directly impacts operational safety and precision. Traditional fire trucks often experience significant boom vibration during sudden starts and stops, which can easily lead to boom and hydraulic system malfunctions, negatively affecting brand reputation and customer satisfaction. Therefore, it's crucial to limit potential boom vibration during the fire truck design phase. Typically, the pilot ratio of the boom cylinder balance valve, the damping orifice of the pilot valve, the current ramp rate of the boom cylinder multi-way valve, and the boom's structural form all influence boom vibration. In traditional designs, fire truck designers rely on experience to adjust the pilot ratio, damping orifice, and current ramp rate of the boom cylinder multi-way valve to reduce changes in the boom's end-effector linear velocity. However, this requires repeated testing under different parameters to determine the optimal design for each condition. Consequently, this approach results in excessively high development costs and long development cycles for fire trucks. Summary of the Invention

[0003] This invention provides a design method, device, electronic equipment, and storage medium for fire truck booms, which solves the problems of high development costs and long development cycles in traditional fire truck boom design methods.

[0004] This invention provides a design method for a fire truck boom, comprising: A multidisciplinary joint simulation model is established, which includes at least a hydraulic system simulation module and a mechanical dynamics simulation module. Set an initial set of design variables, which includes the pilot ratio of the balance valve, the diameter of the damping orifice of the pilot valve, the current slope parameter of the multi-way valve, and the boom structure parameters. Multiple combinations of first design variables are generated based on a pre-defined experimental design method; Each group of first design variable combinations is compared with the allowable error range of the corresponding candidate parameters in the candidate parameter library to select multiple groups of second design variable combinations; Each group of second design variables is input into the multidisciplinary joint simulation model. The hydraulic system simulation module simulates the changes in hydraulic parameters, and the mechanical dynamics simulation module calculates the dynamic response of the boom, thereby obtaining the boom linear velocity fluctuation amplitude corresponding to each group of second design variables. The second design variable, whose boom linear speed fluctuation amplitude is less than a preset threshold, is used as the target design variable, and the target design variable is output.

[0005] According to the fire truck boom design method provided by the present invention, the generation of multiple sets of first design variable combinations based on a preset experimental design method includes: An orthogonal experimental design method was used to construct a parameter orthogonal table, in which the parameters include the pilot ratio of the balance valve, the diameter of the damping orifice of the pilot valve, the current slope of the multi-way valve, and the boom cross-section. Multiple sets of first design variable combinations are generated based on the orthogonal array of parameters, each set containing a specific combination of the parameters at different levels.

[0006] According to the fire truck boom design method provided by the present invention, the step of comparing each group of first design variable combinations with the allowable error range of the corresponding candidate parameters in the candidate parameter library to select multiple groups of second design variable combinations includes: The design variable combination that simultaneously meets the matching conditions is retained as the second design variable combination. The matching conditions include: For the pilot ratio parameter of the balancing valve, select available models from the candidate balancing valve product library whose absolute deviation between the actual pilot ratio and the design variable value does not exceed the preset first threshold. For the pilot valve damping orifice diameter parameter, select the specification from the standard orifice diameter series that is closest to the design variable value and whose deviation does not exceed the preset second threshold. For the current slope parameter of the multi-way valve, a control scheme that can achieve an error between the design variable value and the current slope parameter is selected by interpolation calculation of the control parameters; For the boom cross-sectional shape parameters, a structural scheme with a geometric similarity to the design variables that reaches a preset fourth threshold is matched in the standard structural library.

[0007] According to the fire truck boom design method provided by the present invention, the step of comparing each group of first design variable combinations with the allowable error range of the corresponding candidate parameters in the candidate parameter library to select multiple groups of second design variable combinations further includes: When a combination of design variables cannot simultaneously satisfy the matching conditions of all parameters, the matching precision requirements are relaxed in turn according to the priority of the parameters until a second combination of design variables that meets the conditions is found.

[0008] According to the design method of the fire truck boom provided by the present invention, the step of inputting the combination of each group of second design variables into the multidisciplinary joint simulation model, simulating the change of hydraulic parameters through the hydraulic system simulation module, and calculating the dynamic response of the boom through the mechanical dynamics simulation module to obtain the boom linear velocity fluctuation amplitude corresponding to each combination of second design variables includes: Configure the dynamic characteristic parameters of each hydraulic component in the hydraulic system simulation module; Establish a physical model of the boom corresponding to the variables in the mechanical dynamics simulation module; The hydraulic system simulation module transmits the cylinder driving force calculated based on the dynamic characteristic parameters of each hydraulic component to the mechanical dynamics simulation module in real time. The cylinder displacement and velocity data fed back from the boom physical model corresponding to the variables in the mechanical dynamics simulation module are returned to the hydraulic system simulation module. Simulate the dynamic process of boom start-up and shutdown under typical working conditions, and record the maximum and minimum linear velocities of the boom end during the start-up and shutdown process; The amplitude of the boom end linear velocity fluctuation is calculated based on the maximum and minimum linear velocities.

[0009] According to the design method of the fire truck boom provided by the present invention, the simulation of the boom start-up and shutdown dynamic process under typical working conditions includes: Simulate the acceleration process of the boom from rest to rated speed; as well as, Simulates the deceleration process of the boom from rated speed to rest.

[0010] According to the fire truck boom design method provided by the present invention, the step of taking the second design variable, in which the amplitude of the boom linear velocity fluctuation is less than a preset threshold, as the target design variable and outputting the target design variable includes: Set the threshold range for linear velocity fluctuation amplitude; The simulation results of all combinations of second design variables are sorted, and the combinations of design variables with linear velocity fluctuation amplitudes lower than the threshold value are selected according to the threshold value range of linear velocity fluctuation amplitude. When multiple qualified combinations exist, select one or more design variable combinations with the smallest linear velocity fluctuation amplitude, and output the specific parameter configuration corresponding to the selected design variable combination.

[0011] The present invention also provides a design device for a fire truck boom, comprising: A module is established to build a multidisciplinary joint simulation model, which includes at least a hydraulic system simulation module and a mechanical dynamics simulation module. The setting module is used to set the initial design variable set, which includes the pilot ratio of the balance valve, the diameter of the pilot valve damping orifice, the current slope parameter of the multi-way valve, and the boom structure parameters. The generation module is used to generate multiple combinations of first design variables based on a preset experimental design method. The filtering module is used to compare each group of first design variable combinations with the allowable error range of the corresponding candidate parameters in the candidate parameter library, and filter out multiple groups of second design variable combinations. The acquisition module is used to input each group of second design variable combinations into the multidisciplinary joint simulation model, simulate hydraulic parameter changes through the hydraulic system simulation module, and calculate the boom dynamic response through the mechanical dynamics simulation module to obtain the boom linear velocity fluctuation amplitude corresponding to each group of second design variable combinations. The output module is used to take the second design variable, in which the amplitude of the boom linear speed fluctuation is less than a preset threshold, as the target design variable and output the target design variable.

[0012] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the design method of the fire truck boom as described in any of the preceding claims.

[0013] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the design method of the fire truck boom described in any of the preceding claims.

[0014] The fire truck boom design method, device, electronic equipment, and storage medium provided by this invention establish a multidisciplinary joint simulation model, which includes at least a hydraulic system simulation module and a mechanical dynamics simulation module; set an initial design variable set, including the pilot ratio of the balance valve, the diameter of the pilot valve damping orifice, the current slope parameter of the multi-way valve, and boom structure parameters; generate multiple sets of first design variable combinations based on a preset experimental design method; compare each set of first design variable combinations with the allowable error range of the corresponding candidate parameters in the candidate parameter library to select multiple sets of second design variable combinations; input each set of second design variable combinations into the multidisciplinary joint simulation model, and then... The hydraulic system simulation module simulates changes in hydraulic parameters and calculates the boom dynamic response through the mechanical dynamics simulation module, obtaining the boom linear velocity fluctuation amplitude corresponding to each combination of second design variables. The second design variable whose boom linear velocity fluctuation amplitude is less than a preset threshold is taken as the target design variable and output. This invention achieves the screening of design variables through a pre-constructed multidisciplinary joint simulation model and matches them with selectable candidate parameters. It can obtain the boom vibration under different working conditions and different design variables without actual testing, and thus determine the optimal parameters. This provides a theoretical basis for the selection and design of fire truck hydraulic systems and booms, saving fire truck development costs and shortening the development cycle. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a flowchart illustrating the design method of the fire truck boom provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the AMESIM hydraulic simulation model provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the ADAMS boom multibody dynamics model provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the co-simulation interface provided in an embodiment of the present invention; Figure 5 This is a flowchart of the boom hydraulic system and boom selection and design method provided in the embodiments of the present invention; Figure 6 This is a flowchart of multidisciplinary joint simulation design provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the functional structure of the fire truck boom design device provided in an embodiment of the present invention; Figure 8 This is a functional structure diagram of the electronic device provided in an embodiment of the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0018] Figure 1 A flowchart of the design method for a fire truck boom provided in an embodiment of the present invention is shown below. Figure 1 As shown, the design method for a fire truck boom provided in this embodiment of the invention includes: Step 101: Establish a multidisciplinary joint simulation model, which includes at least a hydraulic system simulation module and a mechanical dynamics simulation module; Step 102: Set the initial design variable set, which includes the pilot ratio of the balance valve, the diameter of the pilot valve damping orifice, the current slope parameter of the multi-way valve, and the boom structure parameters; Step 103: Generate multiple combinations of first design variables based on the preset experimental design method; Step 104: Compare each group of first design variable combinations with the allowable error range of the corresponding candidate parameters in the candidate parameter library to select multiple groups of second design variable combinations; Step 105: Input each group of second design variable combinations into the multidisciplinary joint simulation model, simulate the changes in hydraulic parameters through the hydraulic system simulation module, and calculate the boom dynamic response through the mechanical dynamics simulation module to obtain the boom linear velocity fluctuation amplitude corresponding to each group of second design variable combinations. Step 106: Take the second design variable whose boom linear speed fluctuation amplitude is less than a preset threshold as the target design variable and output the target design variable.

[0019] In the traditional design process of fire truck booms, designers rely on experience to reduce variations in the linear velocity at the boom end by adjusting the pilot ratio of the balance valve, the damping orifice of the pilot valve, and the current ramp of the multi-way valve in the boom cylinder. However, this design process requires repeated experiments to test the boom's vibration under different parameters in order to determine the optimal design for that specific condition. Therefore, this approach results in excessively high development costs and long development cycles for fire trucks.

[0020] The fire truck boom design method provided in this invention involves establishing a multidisciplinary joint simulation model, which includes at least a hydraulic system simulation module and a mechanical dynamics simulation module; setting an initial design variable set, including the pilot ratio of the balance valve, the diameter of the pilot valve damping orifice, the current slope parameter of the multi-way valve, and boom structure parameters; generating multiple sets of first design variable combinations based on a preset experimental design method; comparing each set of first design variable combinations with the allowable error range of the corresponding candidate parameters in the candidate parameter library to select multiple sets of second design variable combinations; and inputting each set of second design variable combinations into the multidisciplinary joint simulation model, which then simulates the hydraulic system... The true module simulates the changes in hydraulic parameters and calculates the dynamic response of the boom through the mechanical dynamics simulation module, obtaining the boom linear velocity fluctuation amplitude corresponding to each combination of second design variables. The second design variable whose boom linear velocity fluctuation amplitude is less than a preset threshold is taken as the target design variable and output. This invention achieves the screening of design variables through a pre-constructed multidisciplinary joint simulation model and matches them with selectable candidate parameters. It can obtain the boom vibration under different working conditions and different design variables without actual testing, and thus determine the optimal parameters. This provides a theoretical basis for the selection and design of fire truck hydraulic systems and booms, saving fire truck development costs and shortening the development cycle.

[0021] Based on any of the above embodiments, such as Figure 2As shown, the hydraulic system simulation module is built using AMESim software and includes: The balanced valve sub-model has an adjustable pilot ratio range of 1.0-4.0; The pilot valve sub-model has an adjustable damping orifice diameter range of 0.5-1.5mm; The multi-way valve sub-model has an adjustable current slope range of 0.05-0.5A / s.

[0022] like Figure 3 As shown, the mechanical dynamics simulation module is built using ADAMS software and includes: The multibody dynamics model of the four-section boom, the drive model of the four hydraulic cylinders, and the mass inertia parameters of the end effector.

[0023] Co-simulation interface such as Figure 4 As shown in the embodiments of the present invention, the multidisciplinary joint simulation design process is as follows: Figure 5 As shown, it specifically includes: Initialization phase: Input key design parameters: boom balance valve pilot ratio (hydraulic system parameter), pilot oil damping coefficient (hydraulic control parameter), boom starting current slope (electric control parameter), and boom structural geometric parameters (mechanical parameter); automatically generate multiple sets of initial design variable combinations.

[0024] Co-simulation phase: Input each set of design variables into the multidisciplinary joint simulation model: a) Calculate the dynamic response of the valve body in the hydraulic subsystem; b) Solve the boom dynamics in the mechanical subsystem. c) The control system simulates the current regulation process; outputs the time history curve of the linear velocity at the end of the boom.

[0025] Performance evaluation phase: Calculate the amplitude of linear velocity fluctuation: ΔV = (V_max - V_min) / 2.

[0026] Compare with the preset stability threshold.

[0027] Decision feedback phase: Qualified solution: Design variable combination whose output fluctuation amplitude is lower than the threshold; Unsatisfactory solution: Triggers the parameter reorganization mechanism, adjusting any of the following parameters: Pilot ratio gradient, damping orifice diameter, current slope, and boom section moment of inertia.

[0028] Based on any of the above embodiments, the generation of multiple combinations of first design variables based on a preset experimental design method includes: An orthogonal experimental design method was used to construct a parameter orthogonal table, in which the parameters include the pilot ratio of the balance valve, the diameter of the damping orifice of the pilot valve, the current slope of the multi-way valve, and the boom cross-section. Multiple sets of first design variable combinations are generated based on the orthogonal array of parameters, each set containing a specific combination of the parameters at different levels.

[0029] In this embodiment of the invention, an L9(3^4) orthogonal array is constructed using orthogonal experimental design, wherein the four factors considered are: The pilot ratio of the balance valve is set to three levels: 1.5, 2.5, and 3.5. The pilot valve damping orifice diameter is set at three levels: 0.8mm, 1.0mm, and 1.2mm. The current slope of the multi-way valve can be set to three levels: 0.1A / s, 0.2A / s, and 0.3A / s. The boom cross-section is available in three horizontal configurations: rectangular, I-shaped, and box-shaped. Nine sets of first design variable combinations are generated based on the orthogonal array, each set containing a specific combination of the above four factors at different levels.

[0030] Based on any of the above embodiments, the step of comparing each group of first design variable combinations with the allowable error range of the corresponding candidate parameters in the candidate parameter library to select multiple groups of second design variable combinations includes: The design variable combination that simultaneously meets the matching conditions is retained as the second design variable combination. The matching conditions include: For the pilot ratio parameter of the balancing valve, select available models from the candidate balancing valve product library whose absolute deviation between the actual pilot ratio and the design variable value does not exceed the preset first threshold. For the pilot valve damping orifice diameter parameter, select the specification from the standard orifice diameter series that is closest to the design variable value and whose deviation does not exceed the preset second threshold. For the current slope parameter of the multi-way valve, a control scheme that can achieve an error between the design variable value and the current slope parameter is selected by interpolation calculation of the control parameters; For the boom cross-sectional shape parameters, a structural scheme with a geometric similarity to the design variables that reaches a preset fourth threshold is matched in the standard structural library.

[0031] In this embodiment of the invention, for the pilot ratio parameter of the balance valve, available models with an absolute deviation of no more than ±0.2 from the actual pilot ratio and the design variable value are selected from the candidate balance valve product library; for the damping orifice diameter parameter of the pilot valve, the specification closest to the design variable value and with a deviation of no more than ±0.05mm is selected from the standard orifice diameter series; for the current slope parameter of the multi-way valve, a control scheme that can achieve an error within ±10% of the design variable value is selected through control parameter interpolation calculation; for the boom cross-sectional shape parameter, a structural scheme with a geometric similarity of more than 90% to the design variable is matched from the standard structure library. The design variable combination that simultaneously meets all four matching conditions is retained as the second design variable combination. In this embodiment of the invention, the step of comparing each group of first design variable combinations with the allowable error range of the corresponding candidate parameters in the candidate parameter library to select multiple groups of second design variable combinations further includes: When a combination of design variables cannot simultaneously satisfy the matching conditions of all parameters, the matching precision requirements are relaxed in turn according to the priority of the parameters until a second combination of design variables that meets the conditions is found.

[0032] In this embodiment of the invention, the priority order is: balance valve pilot ratio → multi-way valve current slope → pilot valve damping orifice diameter → boom cross-section.

[0033] Based on any of the above embodiments, the step of inputting each group of second design variable combinations into the multidisciplinary joint simulation model, simulating hydraulic parameter changes through the hydraulic system simulation module, and calculating the boom dynamic response through the mechanical dynamics simulation module to obtain the boom linear velocity fluctuation amplitude corresponding to each group of second design variable combinations includes: Step 201: Configure the dynamic characteristic parameters of each hydraulic component in the hydraulic system simulation module; Step 202: Establish the boom physical model corresponding to the variables in the mechanical dynamics simulation module; Step 203: Transmit the cylinder driving force calculated by the hydraulic system simulation module based on the dynamic characteristic parameters of each hydraulic component to the mechanical dynamics simulation module in real time; Step 204: Return the cylinder displacement and velocity data fed back from the boom physical model corresponding to the variables in the mechanical dynamics simulation module to the hydraulic system simulation module; Step 205: Simulate the boom start-up and stop dynamic process under typical working conditions, and record the maximum and minimum linear velocities of the boom end during the start-up and stop process; Step 206: Calculate the amplitude of the linear velocity fluctuation at the boom end based on the maximum and minimum linear velocities.

[0034] For example, an initial set of design variables is set, which includes the pilot ratio of the balance valve X1∈[1.5,3.5], the diameter of the pilot valve damping orifice X2∈[0.8,1.2]mm, the current slope of the multi-way valve X3∈[0.1,0.3]A / s, and the boom structure parameter X4; N sets of first design variable combinations are generated based on the orthogonal experimental method, where N≥16; Each group of first design variables is matched with the candidate parameter library to select M groups of second design variable combinations, where M≤N; The amplitude Δv of the boom end linear velocity fluctuation corresponding to each group of second design variables is calculated using the multidisciplinary joint simulation model. The second design variable that minimizes Δv and makes Δv ≤ 0.15 m / s is selected as the optimal design scheme; Output the balance valve model, pilot valve specifications, multi-way valve control parameters, and boom structure parameters in the optimal design scheme.

[0035] In this embodiment of the invention, the simulated boom start-up and shutdown dynamic process under typical working conditions includes: Simulate the acceleration process of the boom from rest to rated speed; as well as, Simulates the deceleration process of the boom from rated speed to rest.

[0036] Based on any of the above embodiments, the step of taking the second design variable, in which the amplitude of the boom linear speed fluctuation is less than a preset threshold, as the target design variable and outputting the target design variable includes: Step 301: Set the threshold range for linear velocity fluctuation amplitude; Step 302: Sort the simulation results of all combinations of second design variables, and filter out the combinations of design variables whose linear velocity fluctuation amplitude is lower than the threshold value according to the linear velocity fluctuation amplitude threshold range; Step 303: When there are multiple qualified combinations, select one or more design variable combinations with the smallest linear velocity fluctuation amplitude, and output the specific parameter configuration corresponding to the selected design variable combination.

[0037] like Figure 6 As shown, the design method for the fire truck boom provided in this embodiment of the invention includes: Initial parameter setting stage: Based on the preset initial design variables (including boom balance valve pilot ratio, pilot oil damping parameters, boom starting current slope, boom structural parameters) and optimization objectives, and combined with a multidisciplinary joint simulation model, multiple sets of first design variable combinations are generated. Parameter matching and filtering stage: Match each group of first design variables with the candidate parameter library: Matching of balance valve pilot ratio, pilot oil damping parameters, starting current slope, and boom structure parameters; determining the feasible combination of second design variables based on the matching results.

[0038] Joint simulation verification phase: Each second design variable is input into the multidisciplinary joint simulation model; the boom end linear velocity fluctuation results of each set of variables are obtained through hydraulic-mechanical coupling simulation.

[0039] Optimal solution determination stage: Compare and analyze the linear velocity fluctuation data of each group; select the second design variable with the smallest fluctuation as the final target scheme; output the design parameter combination for actual boom selection.

[0040] It should be noted that this invention is not limited to fire truck boom design, but can also be applied to other boom structures. Parameter optimization can be achieved through multidisciplinary joint simulation, saving boom development costs and shortening the development cycle.

[0041] The fire truck boom design method provided in this invention first determines multiple sets of first design variables based on preset initial design variables, optimization objectives, and a multidisciplinary joint simulation model. These first design variables include the pilot ratio of the balance valve, the damping orifice of the pilot valve, the current increase slope of the boom cylinder multi-way valve, and the structural form of the boom. Then, each of the first design variables is matched with the pilot ratio of the candidate balance valve, the damping orifice of the pilot valve, the current increase slope of the boom cylinder multi-way valve, and the structural parameters of the candidate boom. Based on the matching results, multiple sets of second design variables are determined. Finally, each of the second design variables is input into the multidisciplinary joint simulation model to obtain the boom corresponding to each of the second design variables. The linear velocity fluctuation results are obtained, and then, based on the various boom linear velocity fluctuation results, the second design variable with the smallest pressure fluctuation is taken as the target design variable. The target design variable is used for the selection and design of the boom hydraulic system and the boom. The technical solution of this embodiment of the invention realizes the screening of design variables through a pre-constructed multidisciplinary joint simulation model, and matches them with the selectable boom hydraulic system parameters and boom structural parameters. The fluctuation results of boom linear velocity under different working conditions and different design variables can be obtained without actual testing, thereby determining the optimal boom hydraulic system parameters and boom structural parameters with the smallest boom velocity fluctuation. This provides a theoretical basis for the selection and design of the boom, saves the development cost of fire trucks and shortens the development cycle.

[0042] The design device for the fire truck boom provided by the present invention is described below. The design device for the fire truck boom described below and the design method for the fire truck boom described above can be referred to in correspondence.

[0043] Figure 7A functional structural diagram of the fire truck boom design device provided in the embodiments of the present invention is shown below. Figure 7 As shown, the fire truck boom design device provided in this embodiment of the invention includes: Module 701 is established to establish a multidisciplinary joint simulation model, which includes at least a hydraulic system simulation module and a mechanical dynamics simulation module. The setting module 702 is used to set the initial design variable set, which includes the pilot ratio of the balance valve, the diameter of the pilot valve damping orifice, the current slope parameter of the multi-way valve, and the boom structure parameters. The generation module 703 is used to generate multiple combinations of first design variables based on a preset experimental design method. The filtering module 704 is used to compare each group of first design variable combinations with the allowable error range of the corresponding candidate parameters in the candidate parameter library, and filter out multiple groups of second design variable combinations. The acquisition module 705 is used to input each group of second design variable combinations into the multidisciplinary joint simulation model, simulate hydraulic parameter changes through the hydraulic system simulation module, and calculate the boom dynamic response through the mechanical dynamics simulation module to obtain the boom linear velocity fluctuation amplitude corresponding to each group of second design variable combinations. The output module 706 is used to take the second design variable, whose boom linear speed fluctuation amplitude is less than a preset threshold, as the target design variable and output the target design variable.

[0044] The fire truck boom design device provided in this embodiment of the invention establishes a multidisciplinary joint simulation model, which includes at least a hydraulic system simulation module and a mechanical dynamics simulation module; sets an initial design variable set, including the pilot ratio of the balance valve, the diameter of the pilot valve damping orifice, the current slope parameter of the multi-way valve, and boom structure parameters; generates multiple sets of first design variable combinations based on a preset experimental design method; compares each set of first design variable combinations with the allowable error range of the corresponding candidate parameters in the candidate parameter library to select multiple sets of second design variable combinations; inputs each set of second design variable combinations into the multidisciplinary joint simulation model, and simulates the hydraulic system... The true module simulates the changes in hydraulic parameters and calculates the dynamic response of the boom through the mechanical dynamics simulation module, obtaining the boom linear velocity fluctuation amplitude corresponding to each combination of second design variables. The second design variable whose boom linear velocity fluctuation amplitude is less than a preset threshold is taken as the target design variable and output. This invention achieves the screening of design variables through a pre-constructed multidisciplinary joint simulation model and matches them with selectable candidate parameters. It can obtain the boom vibration under different working conditions and different design variables without actual testing, and thus determine the optimal parameters. This provides a theoretical basis for the selection and design of fire truck hydraulic systems and booms, saving fire truck development costs and shortening the development cycle.

[0045] Figure 8 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 8As shown, the electronic device may include: a processor 810, a communication interface 820, a memory 830, and a communication bus 840, wherein the processor 810, the communication interface 820, and the memory 830 communicate with each other through the communication bus 840. The memory 830 includes computer programs, an operating system, and acquired data. The processor 810 can call logical instructions in the memory 830 to execute a design method for a fire truck boom. This method includes: establishing a multidisciplinary joint simulation model, which includes at least a hydraulic system simulation module and a mechanical dynamics simulation module; setting an initial set of design variables, which includes the pilot ratio of the balance valve, the diameter of the pilot valve damping orifice, the current slope parameter of the multi-way valve, and boom structure parameters; generating multiple sets of first design variable combinations based on a preset experimental design method; comparing each set of first design variable combinations with the allowable error range of the corresponding candidate parameters in the candidate parameter library to select multiple sets of second design variable combinations; inputting each set of second design variable combinations into the multidisciplinary joint simulation model, simulating hydraulic parameter changes through the hydraulic system simulation module, and calculating the boom dynamic response through the mechanical dynamics simulation module to obtain the boom linear velocity fluctuation amplitude corresponding to each set of second design variable combinations; and using the second design variable whose boom linear velocity fluctuation amplitude is less than a preset threshold as the target design variable and outputting the target design variable.

[0046] Furthermore, the logical instructions in the aforementioned memory 830 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to related technologies, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0047] On the other hand, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon. When executed by a processor, the computer program implements a design method for a fire truck boom provided by the methods described above. The method includes: establishing a multidisciplinary joint simulation model, the multidisciplinary joint simulation model including at least a hydraulic system simulation module and a mechanical dynamics simulation module; setting an initial design variable set, the initial design variable set including a balance valve pilot ratio, a pilot valve damping orifice diameter, a multi-way valve current slope parameter, and boom structure parameters; generating multiple sets of first design variable combinations based on a preset experimental design method; comparing each set of first design variable combinations with the allowable error range of the corresponding candidate parameters in the candidate parameter library, and selecting multiple sets of second design variable combinations; inputting each set of second design variable combinations into the multidisciplinary joint simulation model, simulating hydraulic parameter changes through the hydraulic system simulation module, and calculating the boom dynamic response through the mechanical dynamics simulation module, obtaining the boom linear velocity fluctuation amplitude corresponding to each set of second design variable combinations; and using the second design variable whose boom linear velocity fluctuation amplitude is less than a preset threshold as the target design variable, and outputting the target design variable.

[0048] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. 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. Those skilled in the art can understand and implement this without any creative effort.

[0049] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the parts that contribute to the related technology, can be embodied in the form of software products. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A design method for a fire truck boom, characterized in that, include: A multidisciplinary joint simulation model is established, which includes at least a hydraulic system simulation module and a mechanical dynamics simulation module. Set an initial set of design variables, which includes the pilot ratio of the balance valve, the diameter of the damping orifice of the pilot valve, the current slope parameter of the multi-way valve, and the boom structure parameters. Multiple combinations of first design variables are generated based on a pre-defined experimental design method; Each group of first design variable combinations is compared with the allowable error range of the corresponding candidate parameters in the candidate parameter library to select multiple groups of second design variable combinations; Each group of second design variables is input into the multidisciplinary joint simulation model. The hydraulic system simulation module simulates the changes in hydraulic parameters, and the mechanical dynamics simulation module calculates the dynamic response of the boom, thereby obtaining the boom linear velocity fluctuation amplitude corresponding to each group of second design variables. The second design variable, whose boom linear speed fluctuation amplitude is less than a preset threshold, is used as the target design variable, and the target design variable is output.

2. The design method for a fire truck boom according to claim 1, characterized in that, The generation of multiple sets of first design variable combinations based on the preset experimental design method includes: An orthogonal experimental design method was used to construct a parameter orthogonal table, in which the parameters include the pilot ratio of the balance valve, the diameter of the damping orifice of the pilot valve, the current slope of the multi-way valve, and the boom cross-section. Multiple sets of first design variable combinations are generated based on the orthogonal array of parameters, each set containing a specific combination of the parameters at different levels.

3. The design method for a fire truck boom according to claim 2, characterized in that, The step involves comparing each group of first design variable combinations with the allowable error range of the corresponding candidate parameters in the candidate parameter library to select multiple groups of second design variable combinations, including: The design variable combination that simultaneously meets the matching conditions is retained as the second design variable combination. The matching conditions include: For the pilot ratio parameter of the balancing valve, select available models from the candidate balancing valve product library whose absolute deviation between the actual pilot ratio and the design variable value does not exceed the preset first threshold. For the pilot valve damping orifice diameter parameter, select the specification from the standard orifice diameter series that is closest to the design variable value and whose deviation does not exceed the preset second threshold. For the current slope parameter of the multi-way valve, a control scheme that can achieve an error between the design variable value and the current slope parameter is selected by interpolation calculation of the control parameters; For the boom cross-sectional shape parameters, a structural scheme with a geometric similarity to the design variables that reaches a preset fourth threshold is matched in the standard structural library.

4. The design method for a fire truck boom according to claim 3, characterized in that, The step of comparing each group of first design variable combinations with the allowable error range of the corresponding candidate parameters in the candidate parameter library to select multiple groups of second design variable combinations also includes: When a combination of design variables cannot simultaneously satisfy the matching conditions of all parameters, the matching precision requirements are relaxed in turn according to the priority of the parameters until a second combination of design variables that meets the conditions is found.

5. The design method for a fire truck boom according to claim 1, characterized in that, The process involves inputting each set of second design variables into the multidisciplinary joint simulation model, simulating hydraulic parameter changes through the hydraulic system simulation module, and calculating the boom dynamic response through the mechanical dynamics simulation module to obtain the boom linear velocity fluctuation amplitude corresponding to each set of second design variable combinations, including: Configure the dynamic characteristic parameters of each hydraulic component in the hydraulic system simulation module; Establish a physical model of the boom corresponding to the variables in the mechanical dynamics simulation module; The hydraulic system simulation module transmits the cylinder driving force calculated based on the dynamic characteristic parameters of each hydraulic component to the mechanical dynamics simulation module in real time. The cylinder displacement and velocity data fed back from the boom physical model corresponding to the variables in the mechanical dynamics simulation module are returned to the hydraulic system simulation module. Simulate the dynamic process of boom start-up and shutdown under typical working conditions, and record the maximum and minimum linear velocities of the boom end during the start-up and shutdown process; The amplitude of the boom end linear velocity fluctuation is calculated based on the maximum and minimum linear velocities.

6. The design method for a fire truck boom according to claim 5, characterized in that, The simulated boom start-up and shutdown dynamic process under typical working conditions includes: Simulate the acceleration process of the boom from rest to rated speed; as well as, Simulates the deceleration process of the boom from rated speed to rest.

7. The design method for a fire truck boom according to claim 1, characterized in that, The step of taking the second design variable, in which the amplitude of the boom linear speed fluctuation is less than a preset threshold, as the target design variable and outputting the target design variable includes: Set the threshold range for linear velocity fluctuation amplitude; The simulation results of all combinations of second design variables are sorted, and the combinations of design variables with linear velocity fluctuation amplitudes lower than the threshold value are selected according to the threshold value range of linear velocity fluctuation amplitude. When multiple qualified combinations exist, select one or more design variable combinations with the smallest linear velocity fluctuation amplitude, and output the specific parameter configuration corresponding to the selected design variable combination.

8. A design device for a fire truck boom, characterized in that, include: A module is established to build a multidisciplinary joint simulation model, which includes at least a hydraulic system simulation module and a mechanical dynamics simulation module. The setting module is used to set the initial design variable set, which includes the pilot ratio of the balance valve, the diameter of the pilot valve damping orifice, the current slope parameter of the multi-way valve, and the boom structure parameters. The generation module is used to generate multiple combinations of first design variables based on a preset experimental design method. The filtering module is used to compare each group of first design variable combinations with the allowable error range of the corresponding candidate parameters in the candidate parameter library, and filter out multiple groups of second design variable combinations. The acquisition module is used to input each group of second design variable combinations into the multidisciplinary joint simulation model, simulate hydraulic parameter changes through the hydraulic system simulation module, and calculate the boom dynamic response through the mechanical dynamics simulation module to obtain the boom linear velocity fluctuation amplitude corresponding to each group of second design variable combinations. The output module is used to take the second design variable, in which the amplitude of the boom linear speed fluctuation is less than a preset threshold, as the target design variable and output the target design variable.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the design method for the fire truck boom as described in any one of claims 1 to 7.

10. A non-transitory readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the design method for a fire truck boom as described in any one of claims 1 to 7.

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