1791 results about "Tractive force" patented technology

The invention relates to the technical field of ship control, in particular to a fishing boat control system based on data analysis, which comprises a traction load analysis module, a fluctuation condition division module, an attitude disturbance estimation module, a propulsion power regulation module and a rudder angle correction output module. According to the method, by analyzing the traction force load sequence value and the moment arm length of the fishing net traction point, calculating the left and right side offset torque and marking the action direction, the attitude adjustment precision of the ship is optimized, the operation sea condition level is adjusted according to data, and the ship can be subjected to more reasonable attitude estimation and adjustment under the dynamic working condition; the wind pressure change rate and the pitch angle rate are combined to judge the direction resultant force trend, and the navigation attitude is adjusted according to the sea condition grade, so that the ship can more accurately resist the influence of sea surface storm waves and maintain the course stability, and the rudder angle is corrected by adjusting the propulsion power in real time, limiting the adjustment amplitude of the propulsion power and correcting the rudder angle according to the real-time data of the navigation attitude. And the propulsive efficiency and the navigation precision are optimized.

The invention relates to the technical field of electric vehicle control, and discloses a stability control method and system for an electric vehicle, and the method comprises the steps: collecting vehicle driving data in real time, and dynamically estimating the state parameters of the vehicle through an unscented Kalman filtering algorithm; according to the state parameters of the vehicle, combined with the kinematic model and the foresight trajectory, the expected yawing moment in a short time in the future is calculated, and the longitudinal traction requirement of the vehicle is obtained; and according to the state parameters of the vehicle and the longitudinal traction requirement of the vehicle, the yawing moment and the traction force are decoupled and distributed to the four electric driving wheel ends, and stable control over the electric vehicle is achieved. Compared with a traditional stable control system only based on closed-loop feedback, the stable control system has the advantages that the control response is faster, the yawing intervention is more accurate, and better control performance and vehicle safety are shown under the low-adhesion road surface and high-load working conditions.

The invention relates to the field of locomotive power battery electric quantity control, and particularly discloses a locomotive power battery electric quantity hysteresis equalization control method, which comprises the following steps that: a traction force exerting mode is reset into an axle load transfer mode, and the initial value of an electric quantity equalization compensation coefficient K is a rack axle load transfer coefficient corresponding to zero speed; judging whether the current mode is a power battery power supply mode; if yes, the TCU receives the electric quantity of a front power battery and the electric quantity of a rear power battery in real time according to the current locomotive working mode, calculates the electric quantity average value difference value, monitors the auxiliary load power and the traction motor power and calculates the power difference value; entering a hysteresis control logic process; calculating a dynamic traction force compensation coefficient, ensuring that the traction force compensation amount is matched with the actual load characteristic of the system, correcting the traction characteristic curve in real time, and dynamically compensating the electric quantity difference of the battery; and performing traction distribution control according to the locomotive speed and outputting corresponding traction.

Tire traction is dynamically increased in a vehicle by performing a sequence of steps. The vehicle includes a controllable suspension having a damper, a spring, and an active element, a suspension controller, and a controllable aerodynamic element. The body of the vehicle is positioned at a level which allows for a predetermined amount of upward suspension travel. The suspension controller receives a trigger after the body of the vehicle is positioned at a level which allows for a predetermined amount of upward suspension travel. The suspension controller generates a first control signal upon receipt of the trigger. The first control signal is sent to the active element to generate the positive impulse. The positive impulse causes application of force to the wheel of the vehicle in a downward direction, thereby dynamically increasing tire traction. Oscillation of the body of the vehicle is inhibited using the damper as the body of the vehicle oscillates as a result of the spring, thereby inhibiting oscillation of tire traction. The rise of the body of the vehicle is limited by modulating the variable downforce on the body of the vehicle generated by the controllable aerodynamic element.

The invention relates to the technical field of automatic driving, in particular to a driving control method and system for an unmanned electric tractor, and the method comprises the following steps: obtaining humidity data to generate a state diagram, judging slip to trigger traction adjustment based on the state diagram, analyzing a slope recognition risk to generate a slope parameter, and reading a braking force to judge, coordinate and generate a distribution instruction. According to the method, the humidity difference is obtained through multi-point soil humidity monitoring, distribution characteristics are extracted, accurate sensing of the state of an operation area is achieved, the wheel rotating speed and traction force signals are combined, slipping is recognized in advance, the traction force is dynamically adjusted, and the driving force is kept stable; based on joint analysis of gradient change and vehicle state, slope risk is recognized in advance, optimization control is performed, braking force of front and rear wheels is dynamically distributed, slippage caused by unbalance is avoided, safety of complex terrains is improved, and vehicle stability, path control precision and energy utilization efficiency are improved through cooperation of multi-dimensional data perception and dynamic prediction.

The invention belongs to the technical field of mechanical transmission, and discloses a conductor ring and magnetic resistance array composite permanent magnet thrust bearing and a damping force calculation method. The conductor ring and magnetic resistance array combined type permanent magnet thrust bearing realizes the bearing of non-contact magnetic thrust through the combination of the eddy current ring and the magnetic group array. When thrust from a propeller at the stern end of a propulsion shafting acts, the rotor magnetic group array axially moves, axial traction force is generated between the rotor magnetic group array and the stator magnetic resistance array to counteract the thrust action from the axial direction, meanwhile, the magnetic group array cuts the vortex ring, induction damping is generated on the surface of the vortex ring, damping force is formed, and the vortex ring is driven to rotate. And therefore, the longitudinal vibration during transmission of the propulsion shafting is reduced, and the propulsion shafting system is more silent and stable during operation. In addition, the damping force calculation method does not need complex three-dimensional structure modeling and grid division, is simple in solution, high in universality and short in calculation time consumption, and has high engineering application practical value.

An electrified vehicle includes a human-machine interface to enable a towed vehicle mode to enable electric pumps to lubricate and / or cool vehicle components and to disable driver assistance features while the electrified vehicle is being towed by another vehicle. The electrified vehicle includes a drivetrain having an electric machine configured to provide propulsive torque to vehicle wheels, a high-voltage traction battery selectively connected to the electric machine, a battery powered fluid pump configured to pump fluid to the drivetrain, and a controller programmed to, after receiving a signal enabling towed vehicle operation of the electrified vehicle, control operation of the battery powered fluid pump while the electrified vehicle is being towed. The controller may disable one or more driver assistance features and alerts such as automatic emergency braking, automatic shifting of the drivetrain, automatic parking brake operation, automatic headlights, automatic steering, cruise control, parking assistance, and external object distance detection.

The present invention discloses a support mechanism of a self-adaptive traction robot for a complex wellbore and a control method thereof, and relates to the technical field of oil and gas field development. Each support link assembly in a support mechanism is controlled by an independent hydraulic cylinder and hydraulic valve. When a well wall that each support link assembly contacts in a circumferential direction is irregular, the support mechanism contact effect is not ideal, which leads to a decrease in traction force. In this case, a displacement sensor in a telescopic mechanism detects that a displacement of a traction cylinder piston is small, which is fed back to a ground control system, and then a fluid inflow size of support cylinders corresponding to different support link assemblies is adjusted until the displacement sensor in the telescopic mechanism detects an effective traction distance.

The invention discloses a material fatigue crack propagation prediction method based on a cyclic cohesion model of a random vibration load. The method comprises the following steps: building a crack propagation analysis finite element model based on the cyclic cohesion model; based on the established crack propagation analysis finite element model, calculating the strain of the whole non-cohesion region unit and the separation displacement of the cohesion unit under the current time increment step; according to the separation displacement and the frequency and the amplitude of the current vibration load, the traction force increment in the current time increment step is calculated, and the cohesion strength, the critical separation displacement and the accumulated separation displacement in the traction separation criterion after the fatigue damage increment is loaded are updated; and unit failure judgment is carried out according to the fatigue damage, and if the fatigue damage is reduced to 0 and the cohesive unit rigidity value is reduced to 0, it is judged that macroscopic expansion of fatigue cracks occurs. According to the method, reasonable prediction of fatigue crack growth under the random vibration condition is realized, and the method has wide adaptability.

The invention relates to the technical field of heavy-load trains, in particular to a simulation system, method, equipment, medium and product for a long marshalling heavy-load train, and the system comprises a traction simulation subsystem which is used for inputting train operation data into a preset traction characteristic curve to obtain a train traction force; the braking simulation subsystem is used for inputting the train operation data into a pre-constructed braking establishment process simulation model to obtain a train braking force; the longitudinal simulation subsystem is used for inputting the marshalling conditions into a pre-constructed buffer simulation model to obtain train coupler force; the decision optimization subsystem is used for obtaining a control command of the train based on the train operation data, the marshalling condition, the train traction force, the train braking force, the train coupler force and an optimization strategy; and the operation of the long and large marshalling heavy haul train can be simulated.

The invention provides a driving structure of a crawler belt of a stretcher crawler, and belongs to the technical field of the stretcher crawler, the driving structure of the crawler belt of the stretcher crawler is provided with a dual-driving system, and a crawler belt assembly surrounds two driving wheels and a supporting wheel to form a complete transmission path. Crawler tension changes can be detected in real time, and the rotating speed of the second driving motor can be automatically adjusted. When the front-section resistance of the track is increased, the tension detection device senses the change, and the mechanical speed regulator reduces the rotating speed of the second driving wheel through the centrifugal block and the transmission gear set to form a rotating speed difference to increase the front-section tension of the track so as to provide larger traction force. The whole system follows the constraint relation that delta n = n1-n2 = k * delta T + C, it is ensured that the rotating speed difference linearly corresponds to the tension change, and accurate dynamic adjustment of the crawler tension is achieved through coordinated operation of the double driving wheels.

The invention discloses a casting device and method for producing a high-quality valve casting, relates to the technical field of metal casting devices, and solves the problems that when the cast casting is demoulded, the casting is cooled, and the traction force between the casting and a material in a lower mould base is relatively large, so that the casting is not easy to deform. The lifting rod can be moved out from the interior of the lower die base only through large extrusion force, and damage to a driving source and a casting is large. The casting device for producing the high-quality valve casting comprises a device support and a casting box, an upper support is installed at the top of the device support through screws, the casting box is arranged in the center of the top of the upper support, and the casting device comprises a vibration demolding mechanism installed in the upper support; and the casting mold is arranged in the casting box. According to the demolding device, through forward and reverse rotation of the driving source, the castings under different conditions can be ejected and demolded, the demolding effect is improved while the demolding efficiency is improved, and the quality of the demolded valve castings is guaranteed.

The invention relates to the technical field of vehicle control, and discloses a method and system for adjusting control parameters of a traction control system and related equipment.The method comprises the steps that current road condition information of a vehicle is obtained, and the current working condition corresponding to the vehicle is determined; all driving data of the vehicle from beginning to end under the current working condition are obtained, and the corresponding traction force control condition of the vehicle under the current working condition is determined; driving behavior parameters of a driver are obtained, and the weight of each control parameter of the traction force control system is determined; according to the current working condition, the traction force control condition and the weight, control parameters of a traction force control system are adjusted, and target control parameters are determined. The driving environment and the driving habit are considered when the control parameters of the traction control system are adjusted, so that the adjustment of the traction control system on the control parameters is more in line with the current use scene, and the efficiency of calibration matching work of the traction control system is improved.

The invention provides a high-speed train intelligent model prediction control method and system, and belongs to the technical field of train operation control, and the method comprises the steps: carrying out the prediction of the operation state prediction data of a future high-speed train through employing a pre-trained long-short term memory neural network based on historical operation state data; based on the running state prediction data of the future high-speed train, in combination with the current real-time running state data, performing state estimation by using a fixed lag Kalman smoother to obtain an optimized running state estimation result; based on the optimal control input sequence, the traction force and braking force of the train are controlled and adjusted in real time, and it is ensured that the train runs according to the expected trajectory. According to the method, the problems of nonlinear dynamic and non-Gaussian noise interference are solved, and the state estimation precision is improved; by introducing the multi-particle model, the position and speed dynamic state of each particle of the train is accurately described, the physical consistency of the control strategy is improved, the physical authenticity of the model is enhanced, and the high-precision tracking of the position and speed of the train is realized.

The invention discloses an intelligent cable traction system and a cable traction laying control method. A cable traction machine can electrically pull a traction rope and detect traction force in real time. And when the traction force exceeds a preset traction high threshold value, the cable winding and unwinding mechanism can be controlled to reduce the winding speed, so that the traction rope wound on the traction wheel is properly loosened, and the traction force is gradually recovered to be stable. And meanwhile, the cable winding and unwinding mechanism automatically adjusts the winding speed according to extrusion force data fed back by the pressure detection assembly, and it is ensured that the extrusion force is maintained within the preset parameter range. According to the embodiment of the invention, the extrusion force and the traction force are creatively combined, the winding speed of the cable winding and unwinding mechanism is comprehensively regulated and controlled, and the intelligent cable traction system is always in a reasonable working interval during traction and winding of the traction rope through an intelligent control mode, so that automatic traction and winding of the traction rope such as a steel wire rope are realized; therefore, the automatic traction operation of the cable connected with the traction rope is completed, and the intelligence and safety of cable laying construction are improved.

The invention discloses a vehicle, a control method and device thereof and a controller, and relates to the technical field of vehicles. Under the condition that the vehicle runs on the road of the target type and an acceleration instruction is received, if the controller determines that the expected output torque of the power system is larger than the target torque and the torque rising gradient is larger than the gradient threshold value, the output torque of the power system can be increased according to the target gradient smaller than the torque rising gradient. Under the conditions that the output torque of the power system reaches the expected output torque and the slip rate of the wheels is larger than the slip rate threshold value, the controller can trigger the traction force control system to conduct torque control. Therefore, when the wheels slip, the stability of the vehicle can be improved by controlling the torque through the traction force control system. And before, when the vehicle predicts that the vehicle slips on the basis of the expected output torque and the torque rise gradient, the torque rise gradient can be limited in advance, so that the vehicle is prevented from slipping to a great extent, and the driving stability of the vehicle is further improved.

The utility model discloses a guide roller set which is arranged on a bag delivery machine and used for guiding and pulling a material bag belt and comprises a driving mechanism, a guide rail, a movable seat, a plurality of fixed traction wheels and a plurality of movable traction wheels, and the fixed traction wheels and the movable traction wheels are arranged on a rack and the movable seat at intervals in a one-to-one correspondence mode. The movable seat is rotatably installed on the rack, and an adjusting piece used for controlling the movable seat to rotate is arranged on the rack. According to the utility model, the plurality of movable traction wheels on the movable seat can be driven by the adjusting piece to be separated from the material bag belt, so that a worker can conveniently take out the material bag belt from the guide rail to dredge the guide rail, the operation is simple, and the maintenance efficiency of the bag delivery machine is improved; according to the utility model, the hand of a worker can be effectively prevented from being pulled when the material bag belt is subjected to traction force of the fixed traction wheel and the movable traction wheel, the potential safety hazard that the hand of the worker is pinched by the fixed traction wheel and the movable traction wheel is completely eradicated, and the use safety of the bag delivery machine is improved.

The invention discloses a line gradient design method with optimal energy saving as a target, and relates to the technical field of rail transit. According to the method, firstly, a train operation acceleration curve model, a corresponding traction force model and a braking force model are constructed, corresponding speed value, traction force and braking force data can be searched based on positions, secondly, on the premise that a speed curve is unique, the optimal line gradient design is optimized by taking the minimum traction energy consumption of an objective function as a target through a genetic algorithm, and the optimal line gradient design is obtained. And a certain reference can be provided for rail transit line design.

The invention relates to a locomotive coupler calibration test bench, and the test bench comprises a pressurization device which is used for providing the two ends of a to-be-tested coupler with opposite acting forces; the hoisting device is adjacent to the pressurizing device; the protection device is located on the outer side of the pressurizing device, and the protection device is configured to be switched between a first state for shielding the whole area of the pressurizing device and a second state for exposing at least part of the area of the pressurizing device. After the to-be-tested car coupler is hoisted to the pressurizing device through the hoisting device, acting force in opposite directions can be provided for the two ends of the to-be-tested car coupler through the pressurizing device, a conventional mode of applying traction force through locomotive traction is replaced, the force application control precision in the car coupler force calibration process is improved, and then the calibration result precision is improved; and train operation safety is guaranteed. Moreover, in the test process, the precision of the calibration result can be prevented from being influenced by foreign objects through the protection device, and meanwhile, the operation safety of testers is improved.

The invention relates to the field of unmanned aerial vehicles, in particular to an unmanned aerial vehicle control method and system for paraglider traction and an unmanned aerial vehicle. According to the control method and system and the unmanned aerial vehicle, the unmanned aerial vehicle is controlled to horizontally fly in front of the paraglider; acquiring relative positions of the unmanned aerial vehicle and the paraglider in the air; the height direction offset of the unmanned aerial vehicle and the paraglider is obtained through the relative positions of the unmanned aerial vehicle and the paraglider in the air; setting an offset threshold value, comparing the offset in the height direction with the offset threshold value in real time, and obtaining a comparison result; according to the comparison result, when the offset of the unmanned aerial vehicle and the paraglider in the height direction is larger than the offset threshold value, the unmanned aerial vehicle is controlled to ascend and descend so as to adjust the height. By controlling the relative height of the unmanned aerial vehicle and the paraglider, the paraglider can obtain the maximum horizontal traction force provided by the unmanned aerial vehicle, the traction efficiency of the unmanned aerial vehicle is improved, and the load of the unmanned aerial vehicle is minimum under the condition that the same traction force is provided.

The invention provides a new energy vehicle flying protection method based on a vehicle comprehensive control system and a medium. The new energy vehicle flying protection method comprises the following steps that vehicle state parameters are continuously collected; based on the vehicle state parameters, judging whether the vehicle enters a flying state or not; after it is confirmed that the vehicle enters the flying state, power pre-adjustment and vehicle body posture pre-adjustment are conducted on the vehicle; when the vehicle lands, traction control and stability control are cooperatively executed, so that stable grounding and posture stability are achieved. According to the integrated design, the advantages of system redundancy and cooperative control are brought into full play, the problems of information islands and control conflicts possibly existing in a traditional independent protection system are solved, the whole vehicle control system can form unified control resultant force, and the control effect and the system reliability are improved.

The invention relates to the technical field of pipeline safety protection, in particular to a safety protection device for detecting gas leakage of a petroleum and natural gas pipeline, which comprises a traction bin, the rear end of the traction bin is connected with a plurality of traction cylinders connected end to end, and the outer sides of the traction cylinders are sleeved with detection protection cylinders; an air pump assembly is installed in the traction bin, a traction force regulation and control assembly is installed on the traction bin, and a clutch assembly and a detection protection assembly are arranged between the traction cylinder and the detection protection cylinder. The device can adapt to petroleum and natural gas pipelines at various installation positions, can smoothly move in the pipeline whether a buried pipeline or a high-altitude erected pipeline, continuously detects whether the pipeline leaks gas or not in the moving process, improves the detection efficiency, can be separated from the detection protection barrel through the traction barrel, and is convenient to use. The detection protection cylinder can accurately stay at the leakage position and prevent leakage, the leakage duration time and the leakage amount are greatly reduced, the pipeline safety can be guaranteed, and accident losses can be reduced.

The invention relates to the technical field of agricultural machinery, in particular to a rotary gravity center regulating crawler platform for hills and mountains, which sequentially comprises a crawler chassis assembly, a gravity center regulating assembly and a functional module mounting platform from bottom to top, the gravity center adjusting layer is installed on the chassis rack and located in the space between the crawler belts on the two sides, the gravity center adjusting layer is composed of a supporting base, a slewing bearing module, a linear lead screw module, a battery balancing weight and a machine shell, and the balancing weight is preferably a power battery pack; and the functional module mounting platform is fixed at the upper end of the gravity center adjusting assembly. By adjusting the angular and radial distribution of the counterweights, the center-of-gravity position of the whole machine under the working conditions of cross slopes, longitudinal slopes and obstacle crossing is changed, the stability and driving safety of the crawler belt platform in complex terrains of hills and mountains are improved, and the crawler belt platform can be provided with different functional modules according to operation objects. The method is suitable for various hilly and mountainous region agriculture and engineering application scenes.

Provided is a traction device for lower limb fracture, which comprises: a supporting assembly (10), the supporting assembly (10) comprising a driving assembly (15); a vertical support (20), the vertical support (20) being connected to the supporting assembly (10); a traction assembly (30), the traction assembly (30) being sleeved on the vertical support (20); and a telescopic rod (40), one end of the telescopic rod (40) being connected to the supporting assembly (10), and the other end thereof being connected to the traction assembly (30). The traction device has the following advantages: enabling unified synchronous adjustment of the supporting assembly (10) and the traction assembly (30) and thereby allowing precise adjustment of the traction force, thus guaranteeing ideal alignment and positioning during reduction of fracture; satisfying individualized patient needs in the using process and preventing complications caused by long-time traction; and allowing height and angle to be adjustable, so that the device's applicability across populations is expanded, complications such as a local blood circulation disorder caused by extended use can be prevented, and meanwhile, the supporting effect and the patient comfort are also improved.

The invention relates to the technical field of roller coating hyperbolic aluminum plate machining control, in particular to an edge auxiliary traction system and method for longitudinal large-curvature forming of a roller coating hyperbolic aluminum plate. The edge auxiliary traction system comprises a clamping pre-deformation unit, when a main stretcher is started, a traction clamping jaw pulls down at a basic speed, and a dynamic proportional relation between the edge stretching speed and the central stretching speed is established; during stretching, when the displacement increment reaches a threshold value, the traction force is proportionally distributed according to the distance from the center line, the pull-down force is updated in real time, when the strain deviation exceeds the limit, a deviation area is positioned through a multi-modal array, the traction speed and the pull-down force of the area are increased, and the local curvature radius reaches a critical range, a reinforced traction mode is started; speed and plastic flow phase locking and grain orientation regulation and control are achieved, traction force is maintained till stress is released in the pressure maintaining stage, the longitudinal large-curvature forming precision of the roller-coated hyperbolic aluminum plate is improved, wrinkles and cracks are reduced, and the method is suitable for machining of the high-precision hyperbolic aluminum plate.

According to several aspects, a method for controlling an electric vehicle is provided. The method may include adjusting an operation of one or more electric motors of the electric vehicle to induce a loss of traction of a first wheel of the electric vehicle on a first side of the electric vehicle. The method further may include adjusting an operation of an electric steering system of the electric vehicle to induce a yaw motion of the electric vehicle. A direction of the yaw motion is away from the first side of the electric vehicle.

The invention discloses an underground rack rail trapped rail vehicle transportation automation control system based on an anti-explosion lithium battery, and particularly relates to the technical field of data processing, the underground rack rail trapped rail vehicle transportation automation control system comprises a power monitoring module, a rail detection and positioning module, an inclination detection module and an automatic control module, the power monitoring module is used for monitoring the health state of the anti-explosion lithium battery, and the rail detection and positioning module is used for detecting the inclination of the anti-explosion lithium battery; when it is detected that the health state of the battery declines, an alarm is sent to the automatic control module, the running speed and mode of the vehicle are adjusted, and the track detection and positioning module monitors the position and the track state of the vehicle and is combined with the automatic control module to execute correction operation when the vehicle deviates from the track; the inclination detection module is used for detecting the gradient of the locomotive by using a dynamic inclination angle sensor, calculating the required starting traction force so as to realize stable starting and feeding back gradient data to the automatic control module, and the automatic control module is used for comprehensively controlling the driving path, speed and driving state of the locomotive so as to complete an automatic driving task.