201 results about "Operating speed" patented technology

The shutdown of a compressor (10) installed in a refrigerant circuit (2) in air conditioning or refrigeration system is controlled so as to prevent unpowered reverse rotation of the compressor. Prior to terminating electric power to the compressor drive motor (24), the pressure within the system is relieved and substantially equalized across the compressor, thereby eliminating the possibility of unpowered reverse rotation of the compressor at shutdown. Pressure relief and equalization may be achieved by reducing the operating speed of the compressor to a low forward speed for a period of time prior to deenergizing the compressor drive motor. Pressure equalization may also be achieved by driving the compressor in reverse rotation prior to deenergizing the drive motor.

The invention relates to an oil-proof emulsification control method and system for an air compressor of an urban rail vehicle, and solves the problem of lubricating oil emulsification caused by insufficient working efficiency of the air compressor and environment humidity change by constructing a comprehensive control system comprising the compressor, an oil-proof emulsification device and a controller. The system monitors lubricating oil temperature and environment humidity in real time through a temperature sensor and a humidity sensor; the working rate of the air compressor is accurately calculated, wherein the vehicle operation time t2 takes the operation speed larger than 10 km / h as the calculation starting point; the controller comprehensively judges whether the oil-proof emulsification device is started or not based on temperature, humidity and working rate data, and the control strategy comprises the step of dynamically adjusting the working rate judgment node according to the real-time temperature and humidity. According to the method, accurate and reliable control over the oil-proof emulsification process is achieved, emulsification of the lubricating oil is effectively prevented, and energy consumption and maintenance cost can be reduced.

The invention discloses a paver starting vibration system and a control method, and relates to the technical field of road construction machinery, the control method comprises the following steps: starting a starting stage automatic adjustment mode, setting initial operation parameters, and collecting an actual rotation speed in real time; based on the actual rotating speed, establishing a linear proportional control relation for the running speed, and dynamically adjusting the running speed; and the dynamic adjustment process is continuously carried out, and when specific conditions are met, the mode is automatically switched to the normal mode. The intelligent control that the paving speed is restrained by the vibrating rotating speed is achieved, and the technical problems that in the asphalt paving starting stage, due to the fact that the resistance of the vibrating beam is increased, the actual rotating speed is insufficient, and due to the fact that the vibrating rotating speed is not matched with the paving speed, the pavement compactness is poor, and the flatness is low are solved.

The present invention relates to the technical field of rail transit. Disclosed are a railway crossing control system, method and apparatus, and a storage medium. The system comprises: a speed measurement and distance measurement device, which is used for acquiring the real-time speed of a train and the real-time distance from the train to a crossing on the basis of the real-time signal strength and the real-time signal strength change rate of a detection signal; and a central device, which is used for determining a target crossing closure notification position by means of a pre-trained train operation state prediction model on the basis of the real-time speed of the train and the real-time distance from the train to the crossing, generating crossing closure information and sending the crossing closure information to a crossing device, and generating a train movement permission and sending the train movement permission to an onboard device. In the technical solution of the present embodiment, a crossing closure notification position is determined on the basis of the real-time speed of a train and the real-time distance from the train to a crossing, such that a crossing closure occasion can be automatically determined on the basis of the real-time running speed of the train, the distance from the crossing closure notification position to the crossing can be shortened, the crossing closure occasion is delayed, and the transportation efficiency on a railway side and a road side can be improved.

The invention discloses a magnetic levitation traffic positioning and speed measuring method and system based on a modularized tooth groove plate, and the method comprises the steps: detecting a signal of the modularized tooth groove plate through an eddy current sensor, the modularized tooth groove plate is formed by arranging metal sheets sealed by an insulating material according to a rule, the width of the metal sheets is fixed to be 1, and the position where the metal sheets are located is teeth; the groove width between the adjacent teeth is a specified multiple of l; calculating the running speed of the train according to the waveform time difference of the signals output by the at least two eddy current sensor coils at fixed intervals; carrying out absolute position coding through different tooth groove width ratios to obtain a train absolute position ID; matching line basic data information according to the train absolute position ID, wherein the line basic data information comprises turnout, ramp or curve information; and outputting the speed, the absolute position and the line basic data information to a train control system so as to adjust a train dynamic operation control strategy. According to the invention, the stability and comfort of train operation are effectively improved, and the cost and complexity of the system are reduced.

The invention discloses an anti-skid control method, system, equipment, medium and product for a tracked vehicle, and relates to the field of anti-skid control, and the method comprises the steps: collecting the running speed of a track, the speed of the tracked vehicle, the rotation angular speed of a chain wheel, the output torque of the tracked vehicle and the disturbance quantity of the tracked vehicle in real time; according to the running speed of the crawler, the speed of the crawler and the rotation angular speed of the chain wheel, the real-time slip rate is determined; according to the output torque of the tracked vehicle, the running speed of the track and the rotation angular speed of the chain wheel, the optimal slip rate is determined; according to the real-time slip rate, the optimal slip rate and the disturbance quantity of the crawler, an active disturbance rejection control strategy is adopted, and a driving adjusting signal is obtained; according to the driving adjusting signal, the output torque of the crawler is adjusted, and the crawler is prevented from sliding. According to the invention, an active-disturbance-rejection control strategy is adopted, and the adaptability and stability of the crawler are improved based on a rapid and dynamic anti-skid control method.

The invention discloses a pallet fork lifting control method. The method comprises the following steps that 1, the load weight and lifting control parameters of a pallet fork are obtained; step 2, inputting a target height; 3, calculating a difference value between the actual height and the target height; 4, judging whether the difference value is smaller than a parking deviation allowable value or not, if yes, ending lifting control, and if not, executing the step 5; 5, judging whether the difference value is smaller than a low-speed deviation allowable value or not, and if yes, setting the low-speed positioning speed as the target speed and executing the step 7; if not, executing the step 6; 6, judging whether the difference value is smaller than the deceleration starting distance, and if yes, setting a target speed according to the height deviation; if not, setting the full-speed running speed as the target speed and executing the step 7; and 7, the pallet fork acts according to the target speed. According to the method, the actual speed, the arrival rate and the precision of fork stroke tail end positioning are obviously high, and the environmental adaptability is high.

The invention belongs to the technical field of vehicle emission control, and particularly relates to a highway low-carbon route design method and device based on ecological speed control and a medium. The method comprises the following steps: collecting plateau road vehicle operation and CO2 emission data through a real vehicle test; a road section CO2 accumulated emission prediction model based on a DistilBERT framework is constructed; identifying a speed square difference as a key influence factor by using Sobol sensitivity analysis; adopting Bayesian optimization to formulate ecological speed control strategies of different working conditions, and setting a speed square difference critical value; and finally, the strategy is applied to identify and optimize the high-emission linear unit in a route design stage, and the running speed coordination is improved. According to the method, the light-weight large model and ecological speed control are deeply fused for the first time, the problems of accurate prediction of vehicle carbon emission and active carbon control at the front end of route design in the plateau complex environment are solved, and the purpose of reducing the carbon emission in the operation period from the road alignment source is achieved.

The invention belongs to the technical field of vehicle motor control, and particularly provides a motor power management method based on EMB product performance improvement, and the method comprises the steps: dividing the bus voltage of a motor into a plurality of intervals, and dividing the operation speed of the motor into a plurality of operation intervals from a low speed to a high speed, the bus voltage and the running speed of the motor respectively correspond to different motor bus voltage calibration quantities and motor rotating speed calibration quantities; calculating an offset compensation value of the external characteristics of the motor through the motor bus voltage calibration quantity and the motor rotating speed calibration quantity at the corresponding moments; and performing offset compensation on the T-N external characteristics of the motor by using the calculated offset compensation value of the external characteristics of the motor. A motor rotating speed calibration look-up table is introduced to be combined with a motor bus voltage calibration look-up table, the offset offset value of the external characteristics of the motor is recalculated, a T-N curve of the external characteristics of the motor generates offset, the bus current of the motor is within an expected range, meanwhile, the external characteristics of the motor reach the maximum, and therefore the TTL time of an EMB product can be shortened.

The application discloses a kind of determination methods, device and equipment of oil pump system, belong to vehicle technical field.Method includes: obtaining the acceptable noise value of each driving position in each vehicle speed and each frequency of first vehicle;Obtain the noise attenuation of each driving position in each frequency;Determine the required noise value of first vehicle to oil pump system in each vehicle speed;Obtain the noise value emitted by reference oil pump system in each speed and each frequency;Determine the required operating speed of first vehicle to oil pump system in each vehicle speed;Based on the minimum operating speed of first vehicle to oil pump system in each vehicle speed is not greater than the required operating speed of first vehicle to oil pump system in each vehicle speed, determine that reference oil pump system is the oil pump system of first vehicle.The method makes the determination mode of oil pump system diversification, higher flexibility, and the matching degree of first vehicle is higher, and the noise of oil pump system is smaller when running, improves the driving comfort.

This invention discloses a method for adjusting the operating speed of a sanitation vehicle based on garbage coverage rate, and a sanitation vehicle itself. The method includes the following steps: acquiring image data within a preset area in front of the vehicle; preprocessing the image data, including dynamic ROI delineation, image enhancement and denoising, and brightness normalization; using a deep learning model based on YOLOv5s to detect garbage in the preprocessed image and outputting target boxes for the coverage area; calculating a two-layer coverage rate based on the target detection results and the Otsu threshold segmentation method, combined with color features, and outputting the current garbage coverage rate; and adjusting the operating speed of the sanitation vehicle according to the garbage coverage rate based on preset rules. This invention can improve the accuracy of road garbage coverage rate identification and significantly optimize vehicle operating energy consumption and operating costs.

This invention discloses a multi-objective optimization method for modifying the rear gear system of an engine using an attention-integrated mechanism, relating to the fields of engine NVH control and transmission system design technology. The method first constructs a multibody dynamics model of the engine's rear gear system, including idle speed, rated power point, and common operating speed conditions. The common operating speed conditions are selected as the global optimization benchmark, and a genetic algorithm is used to obtain the initial modification parameter combination. Then, an attention-integrated mechanism is introduced, dynamically and iteratively adjusting the weight coefficients of each operating condition based on the positive or negative state of the error improvement value, and performing a secondary verification of the initial modification parameters. If the weighted total improvement value after iteration is less than zero, negative screening is performed to eliminate the affected components. Finally, the optimization effect is verified by establishing a "dynamic force-vibration-noise" simulation chain. This invention effectively resolves the physical conflict between idling knocking and high-speed whistling by constructing a nonlinear decision model of "dynamic weight allocation + negative screening of operating conditions," achieving robust improvement in the NVH performance of the engine gear system across the entire operating range.

The invention discloses a multi-motor synchronous control method, a multi-motor synchronous control device, multi-motor synchronous control equipment and a computer readable storage medium, and belongs to the field of motor control. And the speed consistency can be improved by uniformly driving each motor through the target driving current determined based on the closed-loop control algorithm, so that the current actual running speed and the current target running speed of the motor set for driving the track are determined in each preset period; according to the deviation value of the actual operation speed relative to the target operation speed, target driving current is determined through a closed-loop control algorithm; finally, all motors in the motor set are driven through the target driving current, the target driving current can be periodically updated, all the motors are uniformly driven, the running speed of all the motors is made to periodically approach the target running speed, and therefore the speed consistency of all the motors can be improved, and losses of the motors and rail components are reduced.

The present application relates to mountain rail transit technical field, provide a kind of based on multi-information fusion's rack train speed measurement positioning method, device and system, the method is read by the vehicle-mounted reader of setting at train bottom the encoding information of ground pulse width encoding signboard, and it is compared with the line basic data stored, realize train absolute position acquisition, simultaneously receive the count information of magnetic electric type speed sensor at gear and reflected photoelectric sensor at rack, and combine gear motor load state to determine train running state, then calculate train relative running distance and running speed, and the absolute position is fused with relative running distance, finally obtain train real-time positioning information and actual running speed, when error exceeds threshold value, issue warning and recalculate.The present application improves the precision and reliability of train positioning and speed measurement, realizes rack section train continuous, dynamic, accurate operation control, has significant engineering application value.

The application discloses a track multi-source dynamic detection data mileage alignment method and device, and relates to the technical field of track transportation; wherein the method comprises the following steps: removing the broken chain of standard mileage data according to the standard mileage data of standard data, a sampling interval, a starting sampling point mileage and line broken chain account information, so as to obtain standard straight development mileage and broken chain position information; performing mileage integration reset on to-be-calibrated mileage data according to train running speed data, a sampling frequency of the to-be-calibrated data and the starting sampling point mileage, so as to obtain to-be-calibrated straight development mileage; configuring calibration parameters; calibrating the to-be-calibrated straight development mileage in sections according to the calibration parameters, first vehicle body acceleration data, second vehicle body acceleration data and the standard straight development mileage, so as to obtain calibration straight development mileage corresponding to the to-be-calibrated straight development mileage; performing broken chain correction on the calibration straight development mileage according to the broken chain position information, so as to obtain calibration mileage data after mileage alignment of the to-be-calibrated mileage data. The application can improve the accuracy of mileage alignment.

The present invention relates to the field of engine technology, and in particular to a method, device, electronic device and storage medium for diagnosing boost pressure faults. The method comprises: obtaining the operating speed, torque and boost pressure values corresponding to the target engine in real time; calculating the effective work accumulation and boost pressure accumulation corresponding to the target engine based on the relationship between the operating speed, torque and boost pressure values; and determining the target engine boost pressure fault based on the relationship between the effective work accumulation and the boost pressure accumulation. The accuracy of the determined target engine boost pressure fault is ensured. This avoids the situation where the boost pressure value at a certain moment is greater than the upper threshold value or less than the lower threshold value, resulting in a false fault alarm, thereby improving the accuracy and effectiveness of determining the target engine boost pressure fault.

A method for establishing a protection level system of a roadside guardrail of an off-highway tour sightseeing vehicle relates to a public traffic safety technology, establishes a collision energy calculation model based on vehicle actual parameters and limit operation conditions, and divides a protection level accurately matched with vehicle risks so as to effectively improve the operation safety level of the sightseeing vehicle. The method for establishing the protection level system comprises the following steps of: acquiring key technical parameters of a large number of in-use sightseeing vehicles in a target area, at least including rated passenger number, curb mass and maximum running speed; performing statistical analysis on the collected servicing quality data of each vehicle type, and determining a 90th percentage value P90 as representative quality of the vehicle type; establishing a physical model for calculating the collision energy of the sightseeing vehicle, wherein the input parameters comprise the calculation mass, the collision speed and the collision angle; and according to the calculated collision energy range of the main vehicle model, establishing and dividing special off-highway sightseeing vehicle guardrail protection levels T1, T2, T3 and T4.

This invention discloses an asphalt paver with easily adjustable asphalt flow rate, relating to the field of road construction technology. It includes a frame with a drive wheel connected to it, a raw material bin connected to the frame, and a material discharge limiting groove connected below the raw material bin. A material discharge adjusting component is installed within the material discharge limiting groove. Both the material discharge adjusting component and the drive wheel are connected to a motor. This invention, by connecting the material discharge adjusting component and the drive wheel to the motor, allows the rotational speed of the material discharge adjusting component to adapt to the rotational speed of the drive wheel. This, in turn, adapts the paver's travel speed to the asphalt discharge speed, solving the problem that when the paver's operating speed changes significantly while the asphalt discharge speed remains constant, the paver's surface smoothness deteriorates and the pre-compaction density of the asphalt layer is affected during asphalt pavement construction.

There is provided method for controlling an electric motor configured to drive a mechanical load, the method being for use in a power tool and comprising: in response to a condition being satisfied, comparing speed of the motor to a speed threshold; and if the motor speed is below the speed threshold, activating a power limitation mode. The power limitation mode comprises: monitoring motor power; adjusting one or more motor control parameters so as to maintain power at or close to a power limit; and in response to a determination that the motor speed exceeds the speed threshold, deactivating the power limitation mode and activating an operating mode in which a reference motor speed for the motor is set to an operating speed.

The invention relates to the technical field of highway operation management, in particular to a highway emergency lane dynamic management method based on ETC data. Comprising the following steps: collecting vehicle ETC label information; analyzing and processing the data through an ETC data processing device, and extracting vehicle operation key parameter information; analyzing the vehicle operation data according to the vehicle operation key parameter information, calculating the average speed of the vehicle between two adjacent gantries, and further analyzing the overall vehicle operation speed; the average speed and the traffic flow of all vehicles in the portal and the portal interval section are collected, a scatter diagram is drawn to carry out Greirschner parabola fitting, the maximum flow value is obtained and serves as the bottleneck traffic capacity of the road section, and the speed value corresponding to the maximum flow value is a threshold value for judging whether the road section is congested or not; according to the vehicle operation data analysis result, the road section traffic operation condition is judged. According to the technical scheme, the traffic capacity and operation efficiency of the road can be improved.

The invention belongs to the field of superconducting electric suspension, and discloses an offline test device and method for a superconducting electric suspension system. The device comprises a suspension platform, a ground stator module, a ground auxiliary support device and a converter device. The suspension platform is arranged above the ground auxiliary supporting device, and the ground stator modules are located on the two sides of the suspension platform. A real suspension state is realized on the ground, and the suspension rigidity characteristics at different operation speeds are equivalent by simulating a rigidity control strategy. The real-time control current of the converter is inversely calculated through an equivalent stiffness control strategy to simulate the suspension stiffness characteristics of the superconducting electric suspension system at different operation speeds, and the suspension characteristics of the vehicle in the operation process can be truly reproduced. Compared with a vibration test fixed on the ground, the precise reproduction of the suspension rigidity can realize the precise reproduction of the vehicle-mounted vibration response under the electromagnetic harmonic disturbance of the vehicle.

This invention discloses a high-speed train axle positioning system and method, belonging to the field of high-speed train maintenance technology. The system includes: an undercarriage axle detection device, installed inside the track and movable along the track, used to detect the position of the axle from under the train; and a side-mounted axle position acquisition device, installed outside the track and movable along the track direction, used to transfer the axle position coordinates detected by the undercarriage axle detection device to its own coordinate system for use by maintenance equipment. This invention relies on the precise axle positioning technology of the undercarriage axle detection device, and then cooperates with the side-mounted axle position acquisition device to form a combined system, improving the operating speed of the side-mounted axle position acquisition device and the positioning accuracy of the axle.

This invention provides a motor control method, a motor control device, a readable storage medium, and a motor. The motor control method includes: setting a set speed and a set direction of rotation for the motor; acquiring the rotor position, operating speed, and operating direction of the motor while it is running; acquiring a first input value for the set speed and a second input value for the operating speed based on the operating direction, operating speed, set speed, and set direction of rotation; acquiring a target current based on the first and second input values; acquiring the actual current of the motor; acquiring a first control value based on the target current and the actual current; acquiring the chopping direction and duty cycle of the three-phase inverter bridge based on the first control value; acquiring the energizing phase sequence of the three-phase inverter bridge based on the operating direction of rotation; and controlling the motor operation using the three-phase inverter bridge based on the chopping direction, duty cycle, rotor position, and energizing phase sequence.

The vehicle carrier comprises a carrier body, a longitudinal driving assembly, a transverse driving assembly, a driving switching assembly, a longitudinal guide assembly, a transverse guide assembly, a longitudinal displacement detection assembly, a transverse displacement detection assembly and a control device, the vehicle carrier does not have steering action in the back-and-forth displacement process between the longitudinally-arranged parking space and the transversely-arranged lane, the rotation step, the transverse displacement distance, the occupied lane area and the running time in the prior art are reduced, the displacement running speed can be increased through guide rail rigid guiding, and the accumulated running time is at least reduced by one third; in addition, various schemes of the safety warning unit visible on the lane are provided for selection, and the running safety is improved. Dynamically photographed pictures are compared with the display outline of the ground warning unit, so that the technical means of preventing obstacles from invading an operation area is adopted, and the operation safety is ensured; based on accurate positioning of rigid guidance, direct-current power supply can be adopted, and automatic charging is achieved; the technical scheme of the invention has the remarkable advantages of low cost, high operation efficiency, safety, reliability and wide adaptability.

The invention relates to the technical field of rail transit, in particular to a method for designing a high-speed railway bridge with in-beam travelling, which comprises the following steps: determining the clear width and clear height of a box beam chamber, keeping the clear width and clear height of the box beam chamber constant along the length direction of the bridge, and arranging a rail on a bottom plate of the box beam; according to the designed running speed of the train and the clear width and the clear height of the box girder cavity, simulation analysis is conducted on the aerodynamic effect in the box girder cavity for the most unfavorable working condition when the train runs; according to simulation analysis results of the mechanical effect and the aerodynamic effect of the train, stress analysis is conducted on the box girder in software, then the theoretical thickness of a box girder bottom plate, a box girder web and a box girder top plate is determined, and design is completed. According to the design method, the defects that in the prior art, when a train runs in a box girder, the aerodynamic effect of an inner cavity of the box girder is obvious, stress of all positions of the box girder cavity is different, but no corresponding design method exists at present are overcome.

The application discloses a kind of PnG mode-based automobile energy efficiency optimization method, it is related to automobile intelligent control technical field, in view of the problem that existing automobile energy efficiency optimization method energy-saving effect is poor, the vehicle instantaneous fuel consumption model under PnG mode is established in the application, and the constraint condition of optimization problem is analyzed in detail.Proposed optimal energy efficiency operating speed optimization model carries out in-depth study to the optimization control algorithm under PnG strategy, and finally proposes the optimization control model based on PnG strategy.Under PnG mode, the control method of the application can effectively optimize speed control in urban road scene, and can significantly improve the energy-saving effect of vehicle.The highest energy-saving rate of the technical scheme of the application can reach 39.4% compared with traditional control method.

According to the method and system for achieving automatic noise reduction and speed reduction running of the train, an ATO train automatic running system generates a speed reduction and energy saving running curve, and when an ATS train automatic monitoring system detects that the train is located at a departure station in front of a resident disturbing area and the current time is in the resident disturbing time period, the train is started to run; and the VOBC vehicle-mounted system controls the train to run from the departure station to the parking station according to the speed reduction energy-saving running curve. The speed reduction energy-saving operation curve comprises an operation curve before entering the resident disturbing area, an operation curve passing through the resident disturbing area and an operation curve after leaving the resident disturbing area, the operation curve before entering the resident disturbing area at least comprises a first acceleration operation stage and a coasting stage, and the operation curve passing through the resident disturbing area comprises the step that the train passes through the resident disturbing area at a constant operation speed of the resident disturbing area; the operation curve at least comprises a deceleration operation stage after leaving the resident disturbing area. Speed reduction and noise reduction operation in the resident disturbing area can be automatically achieved, mistakes and omissions caused by manual operation are avoided, the punctuality rate of overall operation of the train is increased while speed reduction and noise reduction are achieved, and comprehensive operation energy consumption is reduced.

The application discloses a train strong wind adjustment control method and device, medium and train, relates to the field of rail trains, and solves the problem of low real-time performance of monitoring environmental strong wind changes. A vehicle-mounted wind measuring device is used to monitor the wind field in a certain range in front of the running direction of the train, and the real-time monitoring of the whole global continuous wind field around the train, including the wind speed and direction, obtains safety indexes such as the derailment coefficient and the wheel load reduction rate of a section of line in front, and is used for finding the strong wind condition that may affect the driving safety of the vehicle in advance, guiding the train to evaluate the maximum running speed according to the wind field near the line, and improving the line operation efficiency.

The invention provides a method and a device for testing wireless driving permission information, relates to the technical field of railways, and aims to solve the problem that no testing method is used for judging whether the wireless driving permission information is effective or not when a non-train occupies a red light band on a track. The method for testing the wireless driving permission information comprises the following steps: acquiring the current position of a train to be tested, a track circuit fault section and the wireless driving permission information; determining a train operation scene according to the current position of the train to be detected and the track circuit fault section; according to a most limited speed curve corresponding to the train running scene, position information when the running speed of a to-be-detected train is zero is determined, and the most limited speed curve is used for predicting the running speed of the to-be-detected train running on a rail and position information of the train on the rail at the running speed; and determining whether the wireless driving permission information is valid or not according to a matching result of a train permission position in the wireless driving permission information and the position information.

The application provides a vibration test load spectrum compiling method and device, and the method comprises the following steps: acquiring vibration acceleration time domain load, dynamic stress time domain response and vehicle running speed of the actual running condition of a hanging component; dividing the vehicle running speed data into several speed intervals according to the running speed range of the vehicle; obtaining vibration acceleration power spectrum and dynamic stress power spectrum through Fourier transform; performing goodness-of-fit test on the obtained vibration acceleration power spectrum to confirm the distribution of the vibration acceleration power spectrum; synthesizing the vibration acceleration power spectrum under all speed levels into vibration acceleration function test load spectrum under different confidence levels according to the proportion of each speed level in the service period of the vehicle; and compiling the vibration acceleration function test load spectrum under different confidence levels into corresponding vibration acceleration fatigue test load spectrum according to the vibration acceleration function test load spectrum, the service period and the target bench vibration test time.