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37results about How to "Reduce the risk of loss of control" patented technology
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Current calibrating method and device of permanent magnet synchronous motor (PMSM)
PendingCN108696219AReduce the risk of loss of controlEnsure safetyElectronic commutation motor controlVector control systemsElectric machineryPermanent magnet synchronous motor
The invention discloses a current calibrating method and device of a PMSM. The method comprises that an inflection-point rotating speed at which the PMSM enters a weak magnetic area form a non-weak magnetic area and a zero-torque-point demagnetizing current in the weak magnetic area are obtained according to a voltage equation and a set voltage utilization rate of the PMSM; a working area where the PMSM is positioned at present is determined according to the relation of the present rotating speed and the inflection-point rotating speed of the PMSM; when the PMSM is positioned in the non-weak magnetic area, the current of the PMSM in the non-weak magnetic area is calibrated automatically according to a preset maximal torque-current ratio curve; and when the PMSM is positioned in the weak magnetic area, the current of the PMSM in the weak magnetic area is calibrated according to the set voltage utilization rate and the zero-torque-point demagnetizing current in the weak magnetic area. Thus, the calibration time can be shortened substantially, the calibration efficiency is improved, and it is ensured that calibration data is consistent and reliable.
Owner:JING JIN ELECTRIC TECH CO LTD
Space debris rope system dragging despinning and removal method
The invention discloses a space debris rope system dragging despinning and removal method, relates to space debris despinning and removal methods and belongs to the technical field of spaceflight. By the adoption of the method, a trailer spacecraft is launched into an orbit, so that the rendezvous with debris is finished; a trailer is connected with the debris through multiple tying ropes; a dynamical model is established, a control law is designed to adjust the nominal rope length of each tying rope to change the tension of the tying ropes, despinning of the debris is achieved through the cooperation of the multiple tying ropes, the situation that the tying ropes are cut and broken through protruding components on the debris is avoided, and the stability and the redundancy of a rope system trailer system are improved; and a trailer engine is used for ignition, reverse dragging force is applied, the space debris is pulled into the atmosphere to be burnt, and therefore debris removal is achieved. By the adoption of the method, despinning of the space debris can be achieved, the situation that the tying ropes are cut and broken through the protruding components on the debris is avoided, and the stability of the system is improved; and in addition, the redundancy of the tying ropes is improved by increasing the number of the tying ropes. The method can be used for space debris despinning and removal and can also be used for despinning of and control over other non-cooperative targets.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Tropsch synthesis method of fixed bed
ActiveCN101928194AImprove mass and heat transfer performanceSimple equipmentHydrocarbon from carbon oxidesLiquid hydrocarbon mixture productionChemistryLiquid hydrocarbons
The invention relates to a tropsch synthesis method of a fixed bed, which is one-section tropsch synthesis, and comprises the steps of: leading fresh raw material gas H2 and CO to enter a tropsch synthesis reactor of the fixed bed, carrying out tropsch synthesis reaction under the action of tropsch synthesis catalyst, separating the reaction effluent, and obtaining gas hydrocarbon product, liquidhydrocarbon product and water, wherein the liquid hydrocarbon product is separated into light fraction oil, intermediate fraction oil and heavy fraction oil; and returning part of the gas hydrocarbonproduct and the liquid hydrocarbon product back to an inlet of the tropsch synthesis reactor. The invention solves the problems of difficult temperature control of a bed layer of the tropsch synthesis catalyst of the fixed bed, overhigh temperature of the bed layer and poor product selectivity. The invention improves the distribution of the synthetic oil product, and effectively reduces the olefin content of the light synthetic oil product.
Owner:CHINA PETROLEUM & CHEM CORP +1
Engineering change charge monitoring system and method
The invention relates to an engineering changing cost dynamic monitoring system and a method thereof. The dynamic monitoring system and a method comprise the following steps: changing cost information data are sent to a server by a declaration terminal through computer network. The changing cost information data are downloaded by an audit terminal. The audit information data after being audited are uploaded to the server. A monitoring terminal downloads the audit information data from the server to generate a statistical report. All signing data of the changing cost and audit process data are stored in the data storing device of the server, the changing cost statistical report can be examined at any time through the monitoring terminal to actively master the fee condition of changing signing and realize the dynamic monitoring the engineering cost changing.
Owner:施兆洲
Lithium iron phosphate trace mixed ternary cathode material cathode plate, preparation method thereof and power lithium ion battery
InactiveCN107394124AImprove securitySimple preparation processCell electrodesSecondary cells servicing/maintenanceAdhesiveHeat stability
The invention provides a lithium iron phosphate trace mixed ternary cathode material cathode plate, a preparation method thereof and a power lithium ion battery. The lithium iron phosphate trace mixed ternary cathode material cathode plate comprises a cathode material and a current collector. The cathode material comprises a cathode active material, cathode conductive agent and cathode adhesive. The ternary cathode material, lithium iron phosphate, the cathode conductive agent, the cathode adhesive and the cathode solvent are uniformly dispersed, stirred and mixed to form cathode slurry. The mass ratio of the lithium iron phosphate of the whole cathode active material is 0.1%-15%. The invention also provides the preparation method for the cathode plate and the power lithium ion battery employing the cathode plate. According to the cathode plate, the method and the battery, when a partial short circuit occurs due to abuse of a test in a battery, the heat stability is improved; and after trace lithium iron phosphate is mixed with the cathode plate, the conductivity of the cathode plate is clearly improved, the resistance of the cathode plate is rapidly reduced, and the heat generated by the plate in a short circuit process is rapidly reduced, so the security performance of the battery is clearly improved.
Owner:天津中科先进技术产业有限公司
Permanent magnet synchronous motor flux weakening control method and controller
ActiveCN109713960AAssurance controlEnsure effective controlElectronic commutation motor controlAC motor controlPermanent magnet synchronous generatorEngineering
The present application discloses a permanent magnet synchronous motor (PMSM) flux weakening control method and a controller. The method comprises selecting a direct-axis current initial value and a quadrature-axis current initial value which are approximate values of the direct-axis current and the quadrature-axis current actually required by the motor; then, enabling the PMSM to operate at the direct-axis current initial value and the quadrature-axis current initial value; finally, adjusting the direct-axis current and the quadrature-axis current of the PMSM in order that the PMSM operates from the direct-axis current initial value to a direct-axis current target value, and from the quadrature-axis current initial value to a quadrature-axis current target value, wherein the direct-axis current target value is the direct-axis current actually required by the motor, and the quadrature-axis current target value is the quadrature-axis current actually required by the motor. It can be seen that the current response speed can be greatly increased by quickly locking an approximate value of the actually required current, operating the PMSM at the approximate value and adjusting the current of the PMSM on this basis.
Owner:SAIC MOTOR
A container group lifecycle management method based on Kubernetes system architecture
InactiveCN109542605AAvoid the problem of being constantly destroyed and rebuiltIncrease profitProgram initiation/switchingResource allocationControl systemComputer science
The invention discloses a life cycle management method of a container group based on a Kubernetes system architecture, comprising the following steps: 1, a user submits a task to a Kubernetes system for application processing; 2, the user submits the task to the Kubernetes system for application processing. 2, that Kubernetes system judges whether there is a pod correspond to the current task or not, if there is no pod corresponding to the current task, the pod is created, and a timed destruction task is set for the pod; 3. Before the scheduled destruction task of the Pod is executed, whetherthe task staging pool for tasks that correspond to the current Pod is checked, If there is a task corresponding to the current Pod, the task corresponding to the current Pod in the task temporary storage pool is imported into the Pod, the original timing destruction task of the Pod is canceled, and a timing destruction task is set for the temporary Pod again; and if there is a task corresponding to the current Pod, the task corresponding to the current Pod in the task temporary storage pool is imported into the Pod. In order to avoid the problem of Pod being destroyed and rebuilt constantly inthe scenario of frequent task submission, the mode of destruction countdown after Pod execution is adopted, which effectively improves the actual utilization rate of Pod and reduces the risk of out-of-control system resources.
Owner:湖南智擎科技有限公司
A fish-like underwater vehicle with high maneuverability
ActiveCN109080803AImprove mobilityIncrease flexibilitySteering ruddersRotary propellersMicrocontrollerElectric machinery
The invention provides a fish-like underwater vehicle with high maneuverability, which comprises a head, a middle section shell, a back section shell, a tail, a first pectoral fin, a second pectoral fin and a head bottom shell. The head part, the middle part shell, the back part shell and the tail part are sequentially connected through the steering gear; The caudal fin is fixed on both sides of the caudal part; The head is provided with a microcontroller, a power supply and a first steering gear; The first pectoral fin and the second pectoral fin are mounted on both sides of the head and connected with the first steering gear through a connecting rod, so that the pitch angle of the first pectoral fin and the second pectoral fin can be adjusted; A first motor and a second motor are mountedon the first pectoral fin and the second pectoral fin, and the lower end of the motor is connected with the propeller. The fish-like underwater vehicle with high maneuverability improves the maneuverability and flexibility of the fish-like underwater vehicle, and improves the obstacle avoidance ability of the fish-like underwater vehicle. Rich motion forms of fish-like underwater vehicle can notonly stabilize forward, but also achieve emergency brake, float up, change the direction of motion quickly, and enhance the adaptability of fish-like underwater vehicle to complex environment.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Method for synthesizing 4-fluoro-2-nitroaniline by micro-channel reactor
PendingCN111018717AImprove mixing efficiencyImprove heat exchange capacityOrganic compound preparationAmino compound preparationAcetic anhydrideIce water
The invention discloses a method for synthesizing 4-fluoro-2-nitroaniline through a micro-channel reactor. The method is characterized by comprising the steps; adopting a Corning high-flux continuousflow micro-channel reactor, with the molar ratio of p-fluoroacetanilide to nitric acid being 1:(1.0-1.5) as a benchmark, respectively setting the flow rates of an acetic acid-acetic anhydride solutionof 20%-40% of p-fluoroacetanilide and 68% of nitric acid to be 40.0-100.0 mL / min and 4.0-30.0 mL / min, and preheating; carrying out a reaction for 50-200 s at a temperature of 30 DEG C-70 DEG C; and dissolving the product in water, carrying out hydrolysis reaction at the temperature of 90 DEG C-100 DEG C for 2-4 h, stirring in ice water at the temperature of 0 DEG C-5 DEG C for 0.5 h, filtering, washing a filter cake until the filter cake is weakly acidic or neutral, adding petroleum ether, mixing, and drying to obtain the orange solid 4-fluoro-2-nitroaniline with the yield of 83-94%. The method has the advantages of short time, high efficiency, few byproducts and safe, stable and controllable reaction process.
Owner:成都艾必克医药科技有限公司
Remote control bulldozer safety control method, device and system
InactiveCN111827386AImprove intelligenceImprove reliabilityMechanical machines/dredgersSpeed limitSystems engineering
The embodiment of the invention provides a remote control bulldozer safety control method, device and system. The method comprises the steps that control signals are received at least twice in sequence; the receiving delay time of the control signals is calculated according to the at least two times of control signals; and according to the receiving delay time, a vehicle speed limiting instructionof the corresponding level is selected and output, and the level of the vehicle speed limiting instruction is positively correlated with the length of the receiving delay time. According to the remote control bulldozing and safety control method provided by the embodiment of the invention, the safety selectivity and reliability of a remote control bulldozer system can be improved, the intelligentlevel of the bulldozer can be improved, the risk that the bulldozer is out of control is reduced, and the possibility of safety accidents is reduced.
Owner:SHANTUI CONSTR MASCH CO LTD
Access authentication method and device, equipment, server, storage medium and system
PendingCN114500082AReduce the risk of loss of controlUser identity/authority verificationThe InternetEngineering
The embodiment of the invention discloses an access authentication method and device, equipment, a server, a storage medium and a system.The method is applied to access equipment, and the method comprises the steps that registration is conducted through a registration API interface of equipment management service in an Internet of Things server; sending a registration authentication credential of the access equipment to the equipment management service through the registration API interface; receiving a first security credential sent by the equipment management service; wherein the first security credential is generated by the equipment management service under the condition that the registration authentication credential is successfully authenticated; signing identification information of the access equipment based on the first security credential to obtain a second security credential; and accessing the business system service in the Internet of Things server by using the second security credential.
Owner:CHENGDU SENSETIME TECH CO LTD
Real-time quality control method, system and equipment
PendingCN110728315AImprove classification accuracyImprove the effect of quality inspectionCharacter and pattern recognitionElectronic clinical trialsSystem errorQuality control
The invention provides a real-time quality control method. The method comprises steps of obtaining inspection sample data, generating one or more classifiers suitable for detecting system errors of the test sample data based on the test sample data, deploying the classifier to a real-time quality control platform; receiving the real-time inspection data to complete real-time control of the inspection quality. Positive and negative error data set training samples are introduced through simulation, so that classification accuracy of classifier is improved; and meanwhile, the model containing theoptimal model parameters is evaluated by adopting the ROC AUC to complete the training of the classifier, so that the detection data is monitored, the quality inspection performance of the detectionequipment can be further improved, and the out-of-control risk of a laboratory is reduced.
Owner:ZHONGSHAN HOSPITAL FUDAN UNIV
Lithium battery work control method and system, and electric equipment
PendingCN113162180AReduce the risk of loss of controlAvoid getting out of controlBatteries circuit arrangementsElectric powerElectrical batteryResidual charge
The invention is suitable for the technical field of lithium batteries, and provides a lithium battery work control method and system, and electric equipment. The method comprises the following steps: detecting parameter information of a lithium battery working in the working process of the electric equipment in real time, wherein the parameter information comprises the discharging current, the discharging power, the discharging voltage, the battery remaining capacity and the temperature; and when any numerical value in the parameter information is detected to exceed a corresponding preset threshold range, controlling the output of the lithium battery to be chopped so as to limit the current output of the lithium battery. According to the lithium battery work control method provided by the invention, the problem of danger caused by direct power failure of the lithium battery controlled by the battery management system under the abnormal conditions of over-discharge, over-temperature and the like of the existing lithium battery is solved.
Owner:SHENZHEN TOPBAND CO LTD
Safety steering toque reduction force multiplication handlebar
InactiveCN103085924ASteering Control AmplificationProtect life and property safetySteering deviceMotorcyclesGear wheelRoad surface
The invention discloses a handlebar safety steering toque reduction force multiplication device for a motorcycle, a bicycle and a moped scooter. The device is characterized by mainly comprising 1, a driving chain wheel, a chain and a driven chain wheel; 2, a driving belt pulley, a toothed belt and a driven belt pulley; 3, a driving gear, a reverse transition gear and a driven gear; and 4, a driving planetary gear and a driven inner rack. A handlebar can realize the homodromous decelerated rotation of a front fork axle in the four steering toque reduction transmission ways, so that the steering control of a rider over the front fork axle and a front wheel can be greatly enhanced. During the riding of a user, the safety steering toque reduction force multiplication handlebar is stable in steering control indirect passivation, safe and reliable. During running, passive feedback harmful steering torque generated by a bad concavo-convex road surface on the front wheel is reduced, and the control force of dual hands is multiplied, so that excessive steering can be avoided during high-speed running, high catching performance can be maintained, falling and side turning caused by accidental collision can be reduced, out-of-control risks in running are greatly reduced, and the life and property safety of the rider, passengers and roadside pedestrians can be effectively protected.
Owner:崔汉平
Power oil discharge device of extra-high voltage converter transformer, control system and control method
PendingCN111710513AImprove reliabilityIncreased risk of fire out of controlOperating means/releasing devices for valvesTransformers/inductances coolingBodies oilControl system
The invention relates to a power oil discharge device of an extra-high voltage converter transformer, a control system and a control method and belongs to the technical field of the oil discharge of extra-high voltage converter transformers. The power oil discharge device comprise a body tee joint, a stop valve, a body oil tank oil discharge device, an oil conservator oil discharge device and an accident oil pool; the body tee joint is arranged between the upper part of the body oil tank and the bottom of an oil conservator; the first port of the body tee joint is connected with the bottom ofthe oil conservator through a pipeline; the second port of the body tee joint is connected with the oil conservator oil discharge device through a pipeline; the third port of the body tee joint is provided with the stop valve; the output port of the stop valve is connected with the body oil tank through the pipeline; the body oil tank oil discharge device is connected to the bottom of the body oiltank through a pipeline; the output ends of the body oil tank oil discharge device and the oil conservator oil discharge device are respectively connected with the accident oil pool through pipelines; and the body oil tank oil discharge device comprises an oil pump connected with the body oil tank through a pipeline. When an initial fire occurs, a large amount of transformer oil in the body oil tank and the oil conservator can be discharged quickly, safely and reliably.
Owner:ELECTRIC POWER RES INST OF STATE GRID ANHUI ELECTRIC POWER +2
Battery module
ActiveCN112397844AReduce the risk of loss of controlAvoid damageCell component detailsEngineeringElectrical and Electronics engineering
The invention discloses a battery module. The battery module comprises a battery cell and a module shell, the battery cell comprises a battery cell shell and a plurality of pole cores, the plurality of pole cores are arranged in the battery cell shell in parallel, a heat absorption flame-retardant plate is arranged between every two adjacent pole cores, and the battery cells are located in the module shell. According to the battery module disclosed by the embodiment of the invention, the heat absorption flame-retardant plate is arranged between the two adjacent pole cores in the battery cell and can absorb and insulate heat, so that when the battery cell of the battery module is out of control, the heat absorption flame-retardant plate can control the out-of-control phenomenon of a singlepole core; and the out-of-control pole cores are effectively prevented from influencing other non-out-of-control pole cores, so that the out-of-control risk of the whole battery module can be reducedas much as possible, damage to auxiliary sampling wiring harnesses and the like of the battery module can be prevented, and the safety performance of the battery is improved.
Owner:BYD CO LTD
Outdoor split combined tire for electric locomotive
ActiveCN109397988AQuick changeAvoid replacementRoad vehicle tyresWith separate inflatable insertsAssistive device/technologyEngineering
The invention relates to an outdoor split combined tire for an electric locomotive, and relates to the technical field of electric locomotive auxiliary equipment. A fixing block is arranged on an outer connecting tube, a connecting block is arranged on the fixing block, an air bag is arranged on the connecting block, an inner connecting tube is arranged on the air bag, a sleeve is arranged on theinner connecting tube, a fixing device is arranged on the sleeve, the external connecting tube consists of a first connecting tube and an anti-sliding block, the anti-sliding block is arranged on thefirst connecting tube, the air bag consists of an upper plate, an inflating cavity, a lower plate, an air tube and an air nozzle, the upper plate is provided with the inflating cavity, the inflating cavity is provided with the lower plate and the air tube, the air tube is provided with the air nozzle, the inner connecting tube consists of a second connecting tube, a sliding block and a limiting block, the second connecting tube is provided with the sliding block, the sliding block is provided with the limiting block, the sleeve consists of a bottom plate and a barrel body, the bottom plate isprovided with the barrel body, the fixing device consists of a fixing plate and a fixing shaft, and the fixing plate is provided with the fixing shaft. The outdoor split combined tire for the electriclocomotive is high in practicality and quite convenient to use, the risk that the locomotive is out of control due to damage of a tire in a running process is reduced.
Owner:国网河南省电力公司伊川县供电公司 +1
Five-in-one fusion project management and control system
PendingCN114529122AImprove efficiencyAvoid wastingOffice automationResourcesControl systemBusiness management
The invention provides a five-in-one fusion project management and control system, and solves the technical problems of resource waste, labor consumption, time consumption and the like of the current EPC project general contract project. The method mainly aims at a total contracted project of a project taking design as a main body, a design management system is a faucet, and the design management system is a final carrier of project implementation; a contract agreed construction range and construction rules made by a contract management system are the basis of income and risk; the purchase management system is used as a support for project cost and plays a key role in connecting the top to the bottom; the construction management system manages construction and implementation of the project; the business management system is taken as the evaluation basis of risk and cost, and is the core of risk control, budget calculation and creation of higher benefits.
Owner:CHINA CONSTR SEVENTH ENG DIVISION CORP LTD
An emergency fall arrester for preventing cables from falling into wells
InactiveCN106285564BSolve the problem of falling wellAvoid complex processBorehole/well accessoriesLeft halfWell logging
Owner:SOUTHWEST PETROLEUM UNIV
Lithium-ion secondary battery
ActiveCN110265632BImprove structural stabilityReduce the risk of loss of controlSolid electrolytesFinal product manufactureElectrolytic agentPhysical chemistry
The invention discloses a lithium ion secondary battery. The lithium ion secondary battery includes a positive pole piece, a negative pole piece, a separator and an electrolyte solution, the positive pole piece includes a positive active material layer, and the negative pole piece includes a negative active material layer. Wherein, the positive electrode active material of the positive electrode active material layer includes a lithium manganese-based positive electrode active material; the negative electrode active material layer and / or the electrolyte include a sulfur-containing compound, so that the sulfur-containing compound is in the negative electrode The active material layer forms a solid electrolyte interface film containing sulfur elements, and the mass percentage v of the sulfur element in the negative electrode active material layer containing the interface film is equal to the mass percentage u of the manganese element in the positive electrode active material. Satisfy: v=0.018u+ω, wherein, the units of u and v are both wt%, and ω is 0.01-2. The lithium ion secondary battery of the present invention can take into account high safety performance, cycle performance and storage performance at the same time.
Owner:CONTEMPORARY AMPEREX TECH CO
An Unbalanced Battery Pack Charging Method Considering Temperature
ActiveCN107799843BReduce the temperatureCharging safetySecondary cells charging/dischargingElectric powerThermodynamicsCharge current
The invention discloses an unbalanced battery pack charging method considering a temperature. The unbalanced battery pack charging method comprises a battery parameter acquisition and battery temperature estimation part and an unbalanced series battery pack charging control method part considering battery temperature change. Battery characteristic parameter information is obtained by monomer characteristic test, the temperature of each single battery is calculated iteratively by combining the obtained characteristic value and a battery thermal model, a charging current is adjusted according toresidual electric quantity state of each monomer in a battery pack and a battery temperature state estimation result, so that excessively large temperature difference of the monomer of the battery pack or excessively high monomer battery is prevented. The unbalanced battery pack charging method is suitably used for charging application of a series battery pack of an electric vehicle, an energy storage system and the like.
Owner:NANJING UNIV OF SCI & TECH
A signal safety output technology and identification method
ActiveCN108508772BEnsure safetyGuaranteed reliabilityProgramme control in sequence/logic controllersControl systemEngineering
Provided are a signal safety output technology and a recognition method. A dynamic watermark signal is superimposed on a sensing signal, to obtain an output signal of the superimposed watermark signal, and the output signal is output to a control system through a signal line; the control system detects the dynamic watermark signal in the signal, and only the received signal containing the dynamicwatermark signal is considered as a legal signal, or else the signal is illegal; by controlling the amplitude of the dynamic watermark signal, the level of the dynamic watermark signal does not affectthe output signal as the level logic of the legal signal, so the logic level of the received signal can also represent the logic level of the sensing signal. Further, an input signal may be obtainedafter the output signal of the superimposed watermark signal is received, the dynamic watermark signal is filtered out, and the sensing signal is reduced. The signal contains dynamic self-test information, and only one output signal can ensure the safety and reliability of signal output by a sensor, not only is configuration of redundant output lines reduced, but also the safety and reliability ofsignal transmission and use are greatly improved, the anti-interference is higher, and the risk of losing control is low.
Owner:王琰
Drill bit, drilling tool and local underbalanced drilling method
ActiveCN105952383BReduce trafficReduce the risk of loss of controlConstructionsFlushingWell drillingEngineering
The invention relates to a drill bit, a drilling tool provided with the drill bit and a drilling method for realizing partial underbalance drilling by adopting the drilling tool. Annular high-speed jet flow is formed by periodically spraying high-pressure drilling liquid through a high-pressure nozzle arranged at the bottom of the drill bit; and a water hole nozzle is used for spraying drilling liquid which is at a relative negative pressure state, and a negative-pressure region is formed in high-pressure annular jet flow, so that a partial underbalance state is periodically formed at the shaft bottom and rock burst is induced. Based on an underbalance drilling principle, the partial underbalance drilling is formed at the shaft bottom and well pressure above a partial underbalance region is greater than formation pressure; and a mechanical drilling speed is increased, the limitation of an underbalance drilling technology can be overcome, the safety of a drilling process and the smoothness of the drilling work are guaranteed, and the drilling efficiency and the production benefits are effectively improved.
Owner:HISPEED WUHAN PETROLEUM TECH CO LTD
Four-wheel drive vehicle control method and terminal device
ActiveCN113415172BReduce the risk of loss of controlImprove securitySpeed controllerElectric energy managementElectric machineryTerminal equipment
The invention is applicable to the technical field of vehicle control, and discloses a four-wheel-drive vehicle control method and a terminal device. The method includes: acquiring road condition information at a preset distance in front of the four-wheel drive vehicle, operation information of the four-wheel drive vehicle, and data of the four-wheel drive vehicle. Demand torque value; calculate the front axle slip deviation value and rear axle slip deviation value of the four-wheel drive vehicle; determine the front axle slip deviation value according to the road condition information, operation information, required torque value, The target torque value of the axle motor and the target torque value of the rear axle motor; the four-wheel drive vehicle is controlled according to the target torque value of the front axle motor and the target torque value of the rear axle motor. The present invention can intervene in advance according to road condition information, four-wheel drive vehicle operation information and wheel slip conditions, and control the four-wheel drive vehicle according to the target torque value of the front axle motor and the target torque value of the rear axle motor, and can prevent from the power source. It can reduce the risk of vehicle loss of control and improve vehicle safety.
Owner:GREAT WALL MOTOR CO LTD
Output voltage reference limit circuit of direct current converter
PendingCN107562108ALimit the reference signal rangeLimit effective rangeElectric variable regulationHemt circuitsVoltage reference
The invention provides an output voltage reference limit circuit of a direct current converter. The output voltage reference limit circuit includes an output voltage reference signal circuit and an output voltage sampling signal circuit; according to the output voltage reference signal circuit, a reference signal divides voltage through a first resistor and is coupled with an out-phase input end of an operational amplifier, a sampling reference signal of a PWMU single chip microcomputer divides voltage through a second resistor and is in coupling with the out-phase input end of the operationalamplifier, and the reference signal is in parallel connection with the sampling reference signal of the PWMU single chip microcomputer; according to the output voltage sampling signal circuit, an output voltage sampling signal divides voltage through a third resistor and is in coupling with an in-phase input end of the operational amplifier, and the output voltage reference limit circuit can confine the valid range of the output voltage, increase adjustment precision and reduce out-of-control risk.
Owner:张家港市华为电子有限公司
Train control method and device of train control system
InactiveCN101934808BReduce the risk of loss of controlImprove car controlRailway traffic control systemsRoute devices for controlling vehiclesControl systemControl data
A method for controlling a train using a train control system comprises the following steps: obtaining fitting parameters according to train drive related factors (101) which are represented as parameters or coefficients related to a train drive process; acquiring train control data according to the fitting parameters and the factors (102). The method controls the train in a simple manner and prevents the train from being out of control. A device for controlling a train is also provided.
Owner:吴中区横泾博尔机械厂
Vehicle three-stage speed limiting control system and method
InactiveCN112061124AReduce stepsConstitute securityControl devicesElectronic control unitSpeed limit
The invention belongs to the field of vehicle speed limiting control, and discloses a vehicle three-stage speed limiting control system. The vehicle three-stage speed limiting control system comprisesa request signal generation part, a speed limiting value acquisition module, a speed limiting part, a vehicle speed sensor, an electronic throttle and an electronic control unit, wherein the requestsignal generation part is provided with a function button and used for selecting the entry and exit of a speed limiting function mode; the speed limiting function mode comprises a manual speed limiting mode and a positioning speed limiting mode; the speed limiting part receives control instructions from the request signal generation part and is used for selecting and running the speed limiting function mode of the vehicle three-stage speed limiting control system; the speed limiting value acquisition module is used for acquiring a real-time speed limiting value; the vehicle speed sensor is used for generating a vehicle speed signal and acquiring a real-time vehicle speed value; the electronic throttle is provided with a position sensor for generating a position signal to control power output of a target vehicle; and the position signal corresponds to a pressing angle of the electronic throttle and is used for determining the next operation of a driver.
Owner:孟祥柳
A battery pack multi-target charging method
ActiveCN109802190BReduce the temperatureCharging safetyElectrical testingSecondary cells charging/dischargingBattery chargeElectric vehicle
The invention discloses a multi-objective charging method for a battery pack, which includes two parts: a battery charging model and parameter acquisition and a battery multi-objective optimal charging method; the battery characteristic parameters are obtained by interpolation through the extraction of battery characteristic parameters under different magnifications and different SOC states Then establish a battery temperature estimation model to estimate the maximum temperature difference in the charging process of the battery; finally, aiming at the shortest overall charging time of the battery and the smallest charging temperature change difference, optimize the current charged into the battery for each 5% SOC, so as to achieve The purpose of reducing the charging temperature change as much as possible under the premise of the charging time is as short as possible. The invention is applicable to battery cells and group applications such as electric vehicles, energy storage systems and electric tools.
Owner:NANJING UNIV OF SCI & TECH
Double-body reverse motor tricycle
In order to solve the problems that due to the fact that the balance of side three wheels is inconsistent, deviation is prone to occurring in medium-high-speed braking, and rollover accidents are caused, the invention provides a double-body reverse three-wheeled motorcycle which comprises a frame, wheels, an engine and a transmission system. The wheels comprise two front wheels and a rear wheel arranged behind the middle position of the two front wheels, the two front wheels are symmetrically distributed on the left side and the right side of the front end of the frame, the rear wheel is connected to the rear portion of the frame, and the engine, the transmission system, the side bucket cabin, the driver saddle and the oil tank are all arranged above the frame. The fuel tank, the driver saddle and the sidecar cabin are arranged on the left side and the right side of the frame in a split mode, the engine is located below one side of the fuel tank and the driver saddle, the balance of the whole motorcycle is greatly improved, the problem of high-speed brake deviation of a traditional side motor tricycle is solved, and the defect that the traditional side motor tricycle turns over easily due to high-speed small-radius right turning is overcome. The problem that the right three-wheeled motorcycle turns on one side due to the change of the gravity center during high-speed and small-radius turning is solved.
Owner:崔智琛
A space debris tether drag derotation and cleaning method
The invention discloses a space debris rope system dragging despinning and removal method, relates to space debris despinning and removal methods and belongs to the technical field of spaceflight. By the adoption of the method, a trailer spacecraft is launched into an orbit, so that the rendezvous with debris is finished; a trailer is connected with the debris through multiple tying ropes; a dynamical model is established, a control law is designed to adjust the nominal rope length of each tying rope to change the tension of the tying ropes, despinning of the debris is achieved through the cooperation of the multiple tying ropes, the situation that the tying ropes are cut and broken through protruding components on the debris is avoided, and the stability and the redundancy of a rope system trailer system are improved; and a trailer engine is used for ignition, reverse dragging force is applied, the space debris is pulled into the atmosphere to be burnt, and therefore debris removal is achieved. By the adoption of the method, despinning of the space debris can be achieved, the situation that the tying ropes are cut and broken through the protruding components on the debris is avoided, and the stability of the system is improved; and in addition, the redundancy of the tying ropes is improved by increasing the number of the tying ropes. The method can be used for space debris despinning and removal and can also be used for despinning of and control over other non-cooperative targets.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
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