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487 results about "Work cycle" patented technology

Online car-hailing intelligent order sending method and system based on multi-dimensional rule

The invention relates to the technical field of online car-hailing order dispatching, in particular to an online car-hailing intelligent order dispatching method and system based on a multi-dimensional rule, and the method comprises the steps: building a standardized multi-dimensional feature set through collecting passenger orders, driver states, traffic conditions, environmental weather and regional events, and carrying out the combined modeling of regional order demands and driver online conditions based on a recurrent neural network, thereby achieving the intelligent order dispatching of the online car-hailing. Outputting expected passenger and driver thermodynamic distribution, constructing expected difference thermodynamic distribution according to the expected passenger and driver thermodynamic distribution, training a scheduling strategy through reinforcement learning, enabling an unloaded vehicle to actively migrate to a supply and demand gap area before an order is generated, and further combining an order generation condition and driver expected off-duty information to obtain an order generation result; and calculating the accumulated driving time required by the driver to return to the expected off-duty place after the driver completes the service, and selecting the work order for distribution when the time difference between the accumulated driving time and the expected off-duty place is minimum, thereby realizing accurate matching between the order distribution strategy and the driver work cycle. The empty driving rate is effectively reduced, and the quick response capability and the resource configuration efficiency of the system in a dynamic supply and demand environment are improved.
Owner:GUANGZHOU YUEXING TECH INFORMATION CO LTD

Stern bearing lubrication characteristic analysis method coupled with three-dimensional vibration influence of stern shaft

The invention relates to a stern bearing lubrication characteristic analysis method coupled with the influence of three-dimensional vibration of a stern shaft, and the analysis method comprises the steps: S1, inputting global parameters into a bearing lubrication performance and kinetic parameter calculation module and a propulsion shaft system vertical, horizontal and torsional three-dimensional vibration calculation module, and completing the corresponding calculation; s2, obtaining a bearing transfer matrix; s3, obtaining a system transfer matrix; s4, the forced vibration calculation module completes corresponding calculation; s5, a bearing relative position feedback module completes corresponding calculation; and S6, judging whether the calculation of one work cycle is completed or not, and storing and outputting the working characteristic result of the stern shaft-stern bearing in the cycle. By designing a bearing lubrication performance and kinetic parameter calculation module and a propulsion shafting vertical and horizontal torsion three-dimensional vibration calculation module, the vibration and lubrication coupling effect between a stern shaft and a stern bearing is fully considered, and a stern shaft vertical and horizontal torsion three-dimensional vibration and stern bearing lubrication characteristic bidirectional coupling model is established. And a vibration lubrication mutual feedback mechanism under a complex vibration condition is disclosed.
Owner:CHINA STATE SHIPBUILDING CORP LTD RESEARCH INSTITUTE 719

Method and apparatus for determining abnormal trend in supporting of support of fully mechanized mining face

A method for determining an abnormal trend in the supporting of a support of a fully mechanized mining face. The method comprises: acquiring first pressure monitoring data of all hydraulic supports at an initial stage of a stoping process of a fully mechanized mining face, and second pressure monitoring data of all the hydraulic supports during a routine stoping process of the fully mechanized mining face; determining first working cycle pressure data of each hydraulic support at the initial stage of the stoping process, and second working cycle pressure data of each hydraulic support during the routine stoping process; determining reference similarity and real-time similarity of each hydraulic support; and determining an abnormal state of supporting pressure of each hydraulic support.
Owner:CCTEG COAL MINING RES INST +1

Stamping equipment and stamping method suitable for vacuum cup production line

The invention relates to the technical field of vacuum cup production equipment, and discloses stamping equipment and a stamping method.The stamping equipment comprises a machine body, a mounting cylinder is mounted on the inner side of the machine body, a plurality of lower dies are fixedly connected to the inner side of the mounting cylinder at equal intervals, and mounting grooves are formed in the lower dies; an L-shaped rod is slidably connected to the interior of the mounting groove, the L-shaped rod is sleeved with a spring, one end of the L-shaped rod is rotatably connected with a swing rod, one end of the swing rod is hinged to a top rod, and the top of the top rod is fixedly connected with a top plate. According to the stamping equipment, the hexagonal prism structure is formed in the mounting cylinder, efficient layout of the six lower dies is achieved, the stamping equipment can process six stamping parts at the same time in one work cycle through the structural design, and the production efficiency is greatly improved. And moreover, when the lower die moves to an output port of the mounting cylinder, a material ejecting assembly in the lower die can automatically eject out the stamping part, and the function of automatic discharging is achieved.
Owner:LUAN KUNLAN HOUSEHOLD PRODUCTS CO LTD

Telescopic device for crawler-type self-moving tail system

InactiveCN223149442UConveyorsWork cycleWork time
The utility model discloses a telescopic device for a crawler-type self-moving tail system, which is positioned between tail traction equipment and a standard middle part and is used for stretching when the tail traction equipment moves forwards, and then the telescopic device is manually retracted forwards so as to form a gap between the telescopic device and the standard middle part. A middle belt frame is additionally arranged at the gap, so that the middle belt frame and the standard middle part are in butt joint with each other and are matched to continuously transport the coal; the continuous tunneling device is directly connected with tail traction equipment, continuous tunneling without shutdown is achieved by means of continuous extension of the multiple sections of telescopic units, the device is retracted after one work cycle is overhauled, the working time is greatly saved, and the tunneling efficiency is improved.
Owner:XIAN HEAVY EQUIP HANCHENG COAL MINING MASCH CO LTD

Oil pump high and low temperature durability test system

The invention relates to a high and low temperature durability test system for an oil pump. The test system comprises a mold temperature controller assembly, an environment box assembly, an oil pump working cycle assembly, an auxiliary oil tank assembly and a control system. The mold temperature controller assembly can provide medium engine oil with different temperatures, the environmental box assembly can create required high and low temperature environments, the oil pump working circulation assembly realizes flow and pressure adjustment and circulation of oil pumps with different calibers through two independent loops, and the auxiliary oil tank assembly facilitates rapid replacement of test engine oil. And the control system realizes automatic control and parameter monitoring of the whole process. The device can complete various tests such as high-temperature durability, low-temperature durability and high-low temperature cycle durability, has the advantages of low cost, rich test conditions, flexibility in operation, high safety, high adaptability and the like, and effectively improves the research and development test efficiency of the oil pump.
Owner:CHANGSHA JIANKE ELECTRONICS CO LTD

Coating process and quality control of coated objects

A method for modelling a coating process including a plurality of coating parameters, includes the steps of: dispensing, by the coating process and during K work cycles, a coating on each of K pieces of objects to thereby obtain K pieces of coatings; recording, during each of the K work cycles, coating variable values of p coating parameters at M instances to thereby obtain recording results; and measuring at least one coating property at m locations of each of the K pieces of coatings to thereby obtain measurement results. The method is characterized by the step of determining a digital twin of the coating process on the basis of the recording results and the measurement results. By using results from a large amount of classical quality control measurements together with corresponding coating parameter information, a digital twin of the coating process can be determined through statistical processing of such big data. The digital twin may be used either for automatic adjustment of the coating parameters to obtain an improved coating quality, for prediction of the coating quality right after a work cycle to obtain an improved quality control, or for both.
Owner:ABB (SCHWEIZ) AG

Equipment state monitoring method and device, equipment, storage medium and program product

The invention relates to an equipment state monitoring method and device, equipment, a storage medium and a program product. The method comprises the following steps: acquiring a real-time torque signal of target equipment in a current working cycle period, and determining a state monitoring result of the target equipment based on the real-time torque signal in the current working cycle period. The method can improve the accuracy of the state monitoring result of the target equipment.
Owner:CONTEMPORARY AMPEREX TECHNOLOGY CO LTD

Intelligent intermittent pumping control method and system for oil and gas field based on full localization of swan Mongolia system

The invention discloses an intelligent intermittent pumping control method and system for an oil and gas field based on full localization of a swan Mongolian system, and the method comprises the steps: controlling an oil pumping unit to enter a test run state in a first preset time length, a second preset time length and a third preset time length, and then carrying out the effective judgment of an oil pumping load parameter, a liquid production capacity and an oil extraction water content in the test run state; according to the invention, on the basis of monitoring the exploitation condition of the oil well, the influence of the actual operation condition of the oil pumping unit is further considered, and the debugging calculation is carried out based on the obtained pilot operation parameters of the oil pumping unit, so that the working efficiency of the oil pumping unit is improved. Therefore, the reasonable and reliable intermittent pumping work period can be determined, and the intermittent pumping work efficiency of the pumping unit is improved. Moreover, in the process that the oil pumping unit operates according to the intermittent pumping work cycle, the fullness degree and the oil pumping operation parameters of the oil pumping unit are monitored in real time so as to adjust the real-time power state of the oil pumping unit, and therefore the intermittent pumping work efficiency of the oil pumping unit is improved.
Owner:西安众望能源科技有限公司

Wind pressure switch control system and method for heating water heater

The invention relates to the technical field of intelligent control and predictive maintenance of heating water heaters, in particular to a wind pressure switch control system and method for a heating water heater. The method comprises the following steps of: extracting a starting pressure curve slope, a steady-state pressure fluctuation frequency spectrum entropy and a shutdown pressure decay time constant by collecting a time sequence pressure signal in a working period of a fan so as to generate a dynamic feature vector; comparing the vector with a preset reference health vector by the system, and resolving the health state confidence and the state deviation drift rate of the system in real time; when the health confidence coefficient is lower than a safety threshold value or the deviation drift rate is too high, the system executes forced safety locking; if the health degree is slightly reduced, the pre-purging time of the fan is actively prolonged as compensation; according to the method, conversion from fault response to predictive maintenance is achieved, early performance degradation symptoms such as fan abrasion and air duct dust deposition can be recognized in advance, post-maintenance is converted into beforehand intervention, and the fault rate and maintenance cost are effectively reduced.
Owner:甘南藏族自治州能源研究所

Path planning method and full-automatic carrier tape braiding packaging equipment

The invention discloses a path planning method and full-automatic carrier tape braiding packaging equipment, and relates to the technical field of automatic packaging. The method comprises the following steps: acquiring an initial position coordinate of a mechanical arm and identifying a target position of a to-be-grabbed semiconductor device; constructing a feasible position set, wherein the feasible position set comprises all candidate positions which can be safely reached and have no collision risk; traversing the set, calculating the distance from the current position to each candidate position, and selecting the nearest position as a next target; removing the data from the set and updating the set; and when the mechanical arm reaches the target position, grabbing is executed, the final position is recorded, then the position is set as the initial position of the next mechanical arm, and the steps are repeated till all tasks are completed or the target position is empty. When the position of the device in the vibration disc changes or a new device capable of being grabbed appears, the path can be automatically re-planned, the grabbing strategy can be automatically adjusted, invalid movement can be reduced, the work period is shortened, and the production efficiency of the full-automatic carrier tape braiding packaging equipment is remarkably improved.
Owner:HAOKR (SUZHOU) TECHNOLOGY CO LTD

Display and control method thereof

The invention discloses a display which comprises a backlight module and a time sequence controller. The backlight module comprises a target backlight block and an adjacent backlight block, and the adjacent backlight block is adjacent to the target backlight block. The time schedule controller is coupled to the backlight module and generates an initial work cycle of a target backlight block and an initial work cycle of an adjacent backlight block according to pixel data of the image frame. And generating an update work cycle of the target backlight block at least according to the initial work cycle of the target backlight block, the initial work cycle of the adjacent backlight block, the weight value of the target backlight block and the weight value of the adjacent backlight block. And the backlight module adjusts the brightness of the target backlight block according to the updating work period.
Owner:NOVATEK MICROELECTRONICS CORP

Rotor type gas energy engine and working method thereof

The invention discloses a rotor type gas energy engine and a working method thereof, and the rotor type gas energy engine comprises a rotor shell which is internally provided with a cylindrical rotor chamber; the rotor is arranged in the rotor chamber and comprises a rotor shaft and at least one rotor wing arranged on the rotor shaft, and the rotor chamber is divided into rotor cavities with the same number as the rotor wings by the rotor; the airflow inlet and outlet channel comprises at least one air inlet channel and at least one air outlet channel which are arranged on the rotor shell and are equal in number; the compressed air source mechanism is connected with the air inlet channel; and the electric control system is used for controlling start and stop of the air inlet valve and the exhaust valve and the air flow provided by the compressed air source mechanism so as to be matched with rotation of the rotor to complete a working cycle through the three processes of air inlet, acting and exhaust. The rotor type gas energy engine is small in vibration, low in noise, selectable in low speed, medium speed and high speed, fast in stepless speed regulation response, and capable of effectively improving work efficiency, meeting the requirements of low rotating speed, high torque and other different rotating speeds and torques, and achieving stable operation of the engine.
Owner:尚凌云

Combined air inlet two-stage combustion six-stroke engine

The invention discloses a combined air inlet two-stage combustion six-stroke engine, and relates to the field of power energy. In order to overcome the defects that in the prior art, a six-stroke engine is insufficient in gas inlet in the secondary combustion stage, poor in oil-gas mixing quality and low in combustion efficiency, according to the technical scheme, the six-stroke engine comprises a combustion chamber assembly, a fuel injector, a transmission mechanism and a gas distribution mechanism; the gas distribution mechanism comprises a gas inlet pipeline, an exhaust pipeline, a gas storage cavity, a gas inlet pipeline valve, a scavenging duct and a scavenging duct one-way valve, the working cycle of the engine comprises two times of gas inlet and two times of oil injection combustion acting, and the gas storage cavity releases gas to supplement fresh air in the combustion chamber in the second time of gas inlet. The combustion chamber assembly comprises a cylinder, a piston and a cylinder cover, the piston reciprocates in the cylinder, and the cylinder and the cylinder cover are closed to form a combustion chamber. The invention is suitable for improving the heat efficiency and output performance of the engine, especially for an internal combustion engine power system requiring multiple combustion work.
Owner:HARBIN ENG UNIV

Diesel engine cylinder cover vibration signal inversion virtual key phase pulse and whole period feature extraction method

PendingCN119691502AEnergy gradientWork cycle
The invention discloses a diesel engine cylinder cover vibration signal inversion virtual key phase pulse and whole period feature extraction method, and belongs to the field of mechanical signal processing. Collecting a diesel engine cylinder cover vibration signal; based on the autocorrelation function of the signal smooth envelope energy gradient, identifying the whole-cycle signal length of the diesel engine; judging whether a reference signal exists or not, if yes, identifying a key phase triggering position based on interpolation alignment and a cross-correlation function, and if not, intercepting a single full-period signal and storing the single full-period signal as the reference signal; inverting the virtual key phase pulse signal so as to intercept a required full-period signal; typical signal features are extracted, and a whole-period signal feature parameter set is constructed. The method overcomes the problem of difficult key phase pulse signal acquisition caused by difficult installation of a key phase sensor on a high-power-density diesel engine, fully considers the quasi-periodic characteristics of the working cycle of the diesel engine, can accurately identify the whole cycle length, efficiently inverts the virtual key phase pulse signal, and improves the accuracy of the key phase pulse signal. And full-period feature extraction of the vibration signal of the diesel engine under the keyless phase sensor is realized.
Owner:BEIJING UNIV OF CHEM TECH +1

Compressor fault judgment method and device

The invention discloses a compressor fault judgment method and device, and the method comprises the steps: obtaining the operation parameters of a compressor at a plurality of time points in a preset time period, and obtaining a pressure-time corresponding relation, obtaining a division relationship of a plurality of work cycles in a predetermined time period; according to the pressure-time corresponding relation and the division relation of the multiple work periods, the actual indicator diagram of each work period of the compressor in the preset time period is determined; the actual indicator diagram of each work period is compared with a reference indicator diagram obtained in advance, the state of the compressor is judged according to the comparison result, the state comprises a normal type or a fault type, and the actual indicator diagram of the compressor can be obtained through compressor data obtained in real time; and the real-time working condition of compression is judged by comparing the real-time indicator diagram with the reference indicator diagram, so that the production loss caused by the bumping of the compressor is avoided, the operation cycle of the compressor is prolonged, and the maintenance cost of the compressor is reduced.
Owner:PETROCHINA CO LTD

Hydraulic control system of excavator and excavator

The invention discloses a hydraulic control system of an excavator and the excavator. The hydraulic control system comprises a hydraulic pump, a supporting leg device, a working device and a controller. The working device comprises a working hydraulic valve group, the supporting leg device comprises a supporting leg frame valve group and a supporting leg claw, and the controller is connected with the control end of the working hydraulic valve group and the control end of the supporting leg frame valve group; the controller outputs a first signal to the working hydraulic valve group, and the bucket is inserted into the ground; a second signal is output to the working hydraulic valve group, and the working device provides upward boosting force along the slope surface; the controller outputs a third signal to a supporting leg frame valve group, and a supporting leg claw is lifted; a fourth signal is output to a supporting leg frame valve group, and a supporting leg claw presses the ground downwards; in a single working cycle of slope climbing, a first signal, a third signal, a second signal and a fourth signal are output in sequence; and after the excavator arrives at the target operation site and the controller outputs a fourth signal, slope-holding excavation operation is carried out. According to the invention, climbing and hill-holding operation of ramps with the gradient of less than 35 degrees can be realized.
Owner:XCMG EXCAVATOR MACHINERY CO LTD +2

START-STOP AUTOMATIC FOR ONE ENGINE

Start-stop automatic system (101) for an engine (102), comprising a detection device (105) for detecting a recurring work cycle (130) of a work vehicle (100) based on at least one operating parameter; and a switching control (107) for determining a switching-off time (172) of the engine (102) based on the operating parameter within the work cycle (130).
Owner:FEV EURO GMBH

Shafting vibration characteristic analysis method and system based on elastohydrodynamic lubrication

The invention discloses a shafting vibration characteristic analysis method and system based on elastohydrodynamic lubrication, and relates to the technical field of mechanical engineering.The method comprises the steps that the entrainment speed, the time-varying curvature radius and the contact load at a contact point in a gas distribution-oil supply cam pair are determined; respectively inputting the entrainment speed, the time-varying curvature radius and the contact load at the contact point into a friction analysis model in an elastohydrodynamic lubrication state, and calculating a time-varying curve of the total interfacial friction force of the gas distribution-oil supply cam pair in the whole working cycle; based on time-varying friction excitation corresponding to any moment in the change curve, determining a system excitation vector of the gas distribution-oil supply cam pair by using interface friction as a key connection quantity through experimental testing and simulation modeling technologies; according to the system excitation vector and the structure parameters of the camshaft system, establishing a camshaft system torsional vibration characteristic coupling analysis model considering the interface elastohydrodynamic state; and solving the shaft system torsional vibration differential equation set to obtain the influence rule of the time-varying friction on the instantaneous vibration characteristics of the camshaft system.
Owner:HARBIN ENG UNIV

Non-return transmission device for carrier and control system of non-return transmission device

The invention relates to the field of carrier steering control, in particular to a non-return transmission device for a carrier and a control system thereof.The non-return transmission device comprises a large bevel gear, a small bevel gear, a large straight tooth, a small straight tooth, a worm and a turbine which are sequentially meshed, the large bevel gear is fixed to an input shaft, the small straight tooth and the worm are coaxial, the turbine is fixed to an output shaft, and when the worm drives and the turbine drives, the large straight tooth and the small straight tooth are coaxial. Clockwise and anticlockwise rotation of the input shaft is transmitted to the output shaft; when running external force acts on the turbine through the output shaft to try to reversely drive the worm, force flow is cut off through the self-locking effect of the worm and the turbine, non-return of the output shaft relative to the input shaft is achieved, and hand beating and high-speed shimmy are weakened. The input shaft and the output shaft are coaxially arranged through a coaxial device, and the gears, the worm and the worm gear are installed in the shaft box. The control system is provided with an angular speed sensor, a temperature sensor, a vibration sensor, a working cycle number sensor and the like, signals are input into an electronic control unit, and state monitoring and fault early warning are carried out through the electronic control unit.
Owner:JIANGSU WEILI NEW ENERGY MATERIALS CO LTD

Pile foundation excavation method and equipment

The invention provides a pile foundation excavation method and equipment, and belongs to the technical field of foundation pit engineering, the pile foundation excavation equipment comprises an integrated multi-head drilling machine, the integrated multi-head drilling machine can be fixedly mounted at a center hole through a bottom expansion locking mechanism, a plurality of holes can be formed at a time when the integrated multi-head drilling machine works, and the integrated multi-head drilling machine resets and rotates by a certain angle after working once. The drilling work is repeated, then an annular groove is drilled after multiple times of work, a rock core in the annular groove is taken out through a coring tool, then the rock and the mountain in the central area can be separated and taken out through a coring barrel, and the slag removal work is completed; by means of the expansion locking mechanism arranged at the bottom of the drilling machine, the integrated multi-head drilling machine can be fixed to a center positioning hole, the situation that equipment deviates in the working process and influences the overall drilling effect is avoided, the multiple drilling machines are arranged together, drilling work of multiple holes can be conducted at the same time, automatic drilling is achieved, the working efficiency is higher, and the drilling efficiency is improved. Meanwhile, workers do not need to go down to operate, and safety and reliability are achieved.
Owner:杭州图遥科技有限公司 +1

Gear box fault diagnosis method based on speed fluctuation periodic loop graph

The invention discloses a gearbox fault diagnosis method based on a speed fluctuation periodic ring diagram, and the method comprises the following steps: 1, collecting a motor current signal, a motor instruction rotation speed signal and a motor rotation angle signal through an RV gearbox fault simulation experiment table, and enabling the fault type to be a sun gear single tooth crack wear fault; 2, setting a window parameter set in a certain range; 3, at a fixed moment, carrying out high-order multiple compression transformation on the fault motor current signal, and further extracting an actual current instantaneous frequency; 4, converting the actual current instantaneous frequency into an actual motor speed; 5, calculating speed fluctuation; 6, setting a speed fluctuation threshold value, and traversing all moments to obtain an optimal window parameter set; 7, self-adaptive high-order multiple compression transformation is carried out, and motor speed fluctuation is calculated in a self-adaptive mode in the complete work period; and 8, drawing a speed fluctuation periodic loop graph based on the motor rotation angle signal. According to the method, the gear box fault is visually displayed by detecting the abnormal speed fluctuation synchronous with the fault tooth meshing period, the problems that the resolution of traditional time-frequency analysis is low, distortion is caused by fixed window parameters, and the spectral analysis result is unreliable are solved, and the gear box fault can be more visually and accurately diagnosed.
Owner:昆明铁道职业技术学院(昆明市教育对外合作交流中心)

Engine fuel injection method, engine, vehicle and computer-readable storage medium

This invention provides a fuel injection method for an engine, an engine, a vehicle, and a computer-readable storage medium, relating to the field of vehicle exhaust emission control technology. The fuel injection method provided by this invention includes the following steps: Before the engine reaches a stable idle speed, fuel is injected at a preset fuel pressure during the first intake stroke and the first compression stroke of each working cycle, wherein the fuel injection mass ratio of the first intake stroke to the first compression stroke is greater than 4:1, and the preset fuel pressure ranges from 20 to 50 MPa. When the engine speed is at a stable idle speed, fuel is injected during the second intake stroke and the second compression stroke of each working cycle at a preset fuel pressure, wherein the fuel injection mass ratio of the second intake stroke to the second compression stroke is greater than or equal to 4:1. This method ensures that the vehicle's exhaust emission level meets the requirements of Euro 6 emission standards without requiring a particulate filter, thus optimizing the engine's original emissions.
Owner:ZHEJIANG GEELY HLDG GRP CO LTD +1

A method for verifying the airworthiness compliance of an aviation turbofan engine swallowing a bird

The present application provides a method for verifying the airworthiness compliance of an aviation turbofan engine for swallowing a bird. The method determines the type of test required according to different engines, and then conducts bird-swallowing airworthiness compliance verification in different ways for birds of different weights. When conducting any single test, only targeted tests need to be carried out, and there is no need for the coordinated cooperation of multiple engine resources, test bench resources, debugging and test projection bird resources, human resources, etc. The method is comprehensive and systematic, ensuring that the verification is reasonable and effective, while shortening the working cycle, saving test resources, and reducing development costs. The entire method has been successfully applied in the airworthiness compliance verification of the turbofan engine's bird-swallowing capability.
Owner:AECC SHENYANG ENGINE RES INST

Acceleration and deceleration control method for servo motor of press machine

The invention discloses an acceleration and deceleration control method for a servo motor of a press machine, and relates to the technical field of servo motor control, and the method comprises the following steps: obtaining a historical acceleration and deceleration control scheme of the servo motor of the press machine in a historical work period; performing corresponding correlation coefficient analysis on the influence factors after the implementation of the sub-control factor set in the historical pressure acceleration and deceleration control scheme and the control factor set for each historical acceleration and deceleration control scheme to obtain a preprocessing coefficient set; acquiring a current acceleration and deceleration control scheme implemented by the press machine in the current working period, and counting correlation coefficients among influence factors generated by the current acceleration and deceleration control scheme according to the preprocessing coefficient set to obtain a target preprocessing coefficient set; the effect is that the acceleration and deceleration control of the servo motor is more adaptive to the production requirements of the press.
Owner:SUZHOU STE INTELLIGENT TECH CO LTD

Servo prepressing forming device and method for double-layer powder material

The invention discloses a double-layer powder material servo prepressing forming device and method, and belongs to the technical field of powder metallurgy forming. A set of built-in servo driving mechanism is additionally arranged on a traditional forming upper punching mechanism, a set of movable pre-pressing upper punching mechanism is additionally arranged, after first-time powder filling is completed, the forming upper punching mechanism stops at the first position, at the moment, the pre-pressing upper punching mechanism conveys a pre-pressing upper punch to the upper side of a die cavity, and through control of a servo motor, the forming upper punching mechanism stops at the first position; the driving rod moves downwards to make contact with the pre-pressing upper punching mechanism, the pre-pressing upper punching head is pressed into the die cavity, the needed interlayer interface shape is pressed, then the driving rod and the pre-pressing upper punching head retreat, secondary powder filling is conducted, and the forming upper punching head enters the die cavity to conduct final forming pressing. Step-by-step powder filling and step-by-step pressing are achieved in one working cycle of the forming upper punching mechanism, the requirement that the interlayer interface shape of a final product can be set is met, operation is easy and convenient, the application range is wide, and the method can be popularized to various powder metallurgy devices.
Owner:YANGZHOU PRIUS MOLDING EQUIPMENT CO LTD

Load spectrum compilation method of engineering vehicle, electronic equipment and readable storage medium

The invention discloses a load spectrum compilation method of an engineering vehicle, electronic equipment and a readable storage medium. The method comprises the following steps: acquiring driving information of the engineering vehicle under different working conditions in at least one working cycle; the working cycle refers to a process from execution of one-time transportation to end of the transportation; the driving information at least comprises a driving speed; according to the driving information and the vehicle information of the engineering vehicle, the rotating speed of a power input shaft of the engineering vehicle under different working conditions in all the working cycles and the duration and the use frequency corresponding to the different working conditions in all the working cycles are obtained; acquiring torques of the power input shaft under different working conditions in each working cycle; and determining a load spectrum of the engineering vehicle based on the rotating speed, the torque, the driving speed, the duration and the use frequency. Therefore, the load spectrum of the engineering vehicle can be conveniently compiled, and the compilation efficiency and applicability of the load spectrum of the engineering vehicle are improved.
Owner:ZOOMLION HEAVY INDUSTRY SCIENCE AND TECHNOLOGY CO LTD

Dynamic matching method, device, system and medium of electric drive system based on load spectrum driving, and product

PendingCN122365846AThermodynamicsWork cycle
This invention relates to the field of electric drive technology, and particularly to a dynamic matching method, device, system, medium, and product for electric drive systems based on load spectrum driving. The method includes: acquiring load spectrum data based on the operating conditions of the electric drive system and the fatigue work cycle table of engineering machinery; classifying the load spectrum data, judging the motor's overload suitability, and compiling a cyclic load spectrum; obtaining the motor's theoretical temperature rise result and the motor's thermal simulation temperature result; dynamically adjusting the motor's thermal capacitance coefficient and thermal resistance coefficient based on the obtained motor theoretical temperature rise result and motor thermal simulation temperature result; and outputting the final motor thermal capacitance coefficient and motor thermal resistance coefficient. For redundancy optimization in motor overload matching, a closed-loop process of drive system load spectrum acquisition – load spectrum analysis – overload temperature rise theoretical calculation – motor thermal simulation verification is used to solve the problems of excessive redundancy, insufficient dynamic adaptability, and poor economy in traditional motor selection.
Owner:CHINA RAILWAY CONSTR HEAVY IND

Signal filtering method for electronic accelerator pedal of rice transplanter

The invention relates to the technical field of agricultural equipment new energy driving, in particular to a rice transplanter electronic accelerator pedal signal filtering method, which comprises the following steps in each work cycle: S1, accelerator pedal signal acquisition and processing; s2, state prediction and variance prediction are carried out; s3, state updating and variance updating are carried out; and S4, outputting a filtering result. According to the method, an accelerator pedal signal is filtered by adopting a self-adaptive maximum correlation entropy Kalman filtering algorithm based on a student t kernel, and the algorithm comprises an innovative kernel bandwidth self-adaptive adjustment method of maximum correlation entropy Kalman filtering based on the student t kernel. Compared with a traditional filtering algorithm, the method has higher robustness on paddy field non-Gaussian noise, the robustness estimation capacity of the system on the opening degree of the accelerator pedal is effectively enhanced, and the control stability and precision of the electric drive system in the complex paddy field environment are improved.
Owner:CHINA AGRI UNIV

Method for operating an industrial robot, and control device

The invention relates to a method for operating an industrial robot, wherein a plurality of movements are carried out by the industrial robot during a work cycle to be completed within a specified target cycle time, the speed of the movements being described by a speed parameter. According to the invention, the following steps are carried out in order to approximate the target cycle time and / or reduce the load on the industrial robot: a. selecting a plurality of movements in order to form a movement corpus and ascertaining movement data belonging to the movements in the movement corpus, the movement data comprising a load resulting from the movement, b. temporarily storing the movement data, including a unique assignment to the corresponding movement, c. evaluating the temporarily stored movement data and selecting at least one movement to be controlled by means of a control intervention, d. carrying out a control attempt involving at least one control intervention, a new speed parameter for a movement to be controlled being determined as part of a control intervention, whereby the target cycle time is approximated and / or the load on the industrial robot is reduced, and e. storing the new speed parameter generated during the control intervention as the new speed parameter for the movement to be controlled. The invention also relates to a control device.
Owner:ROBERT BOSCH GMBH