111 results about "Drag torque" patented technology

The invention discloses a Yellow River water conservancy project real-time monitoring system based on edge computing, and particularly relates to the technical field of cloud computing. The system constructs a flow state characteristic interval by collecting water and sediment data; loading an algorithm component based on flow state characteristics, and changing a master control pointer by using atomization operation to realize calculation power logic hot switching; analyzing a difference value between the instantaneous torque of the motor and the no-load reference to obtain a sediment deposition resistance torque; mapping the resistance moment to a digital shadow table to extract a gain compensation parameter; and resetting controller parameters and modulating the pulse width signal according to the compensation coefficient, and outputting a driving voltage to control the gate. Through the edge end algorithm hot switching technology, the problems that a traditional system is difficult to adapt to the variable water and sediment working conditions of the Yellow River and logic updating shutdown are solved, and monitoring continuity is guaranteed. The defect of power mismatching of a single driving mode is overcome, motor overload and mechanical jamming are prevented, gate control accuracy and operation stability are greatly improved, and the service life of equipment is greatly prolonged.

The invention concerns a Brake carrier (10) for disc brake arrangement (11), the disc brake arrangement (11) having brake pads (24) that are displaceable relative to a brake disc (100), wherein the brake carrier (10) is configured to support the brake pads (24) during their displacement; wherein the brake carrier (10) comprises at least a first portion (14) that is arrangeable on a first side (13) of the brake disc (100), a second portion (16) that that is arrangeable on a second side (15) of the brake disc (100) and two connecting portions (18, 20) each connecting the first and second portions (14, 16); wherein at least one of the connecting portions (18, 20) comprises an air channel (12) having a first end (34) that is arranged so as to face towards the brake disc (100). Also disclosed is a disc brake arrangement (11) comprising such a brake carrier (10).

The invention relates to a control system which comprises a hydraulic valve and a hydraulic pump, wherein the hydraulic pump feeds the hydraulic valve via a first feed line, the hydraulic pump is driven by an internal combustion engine, the control system comprises a computing unit, the control system further comprises an intermediate feed line, and a load detection line bypassing the intermediate feed line; wherein the valve comprises an open position and a closed position; a pressure of the load detection line controls a resisting torque of the hydraulic pump; the computing unit detects a stalling risk of the engine as a function of an engine speed of the internal combustion engine, and in response, controls a movement of the hydraulic valve towards the closed position; the movement of the hydraulic valve towards the closed position causing a drop in the pressure of the load detection line.

The invention relates to an automatic train coupling with a coupling head comprising a coupling lock, wherein the coupling lock is designed as a rotary lock with a coupling eye and a frog, wherein the frog is rotatable about a main axis between a coupled position and an uncoupled position, the coupling eye is rotatably connected to the frog at a first end about a coupling eye axis and has a second free end, and the frog has a jaw that is arranged to receive a second end of a coupling eye of a counter-coupling head; with a decoupling device comprising a motor connected to the frog via a drive link to rotate the frog from the coupled position to the uncoupled position; with a damping device that dampens a rotation of the core by means of a resistance torque. The coupling according to the invention is characterized in that the damping device is arranged to dampen the rotation of the frog from the uncoupled position to the coupled position with a greater resistance torque than the rotation of the frog from the coupled position to the uncoupled position.

A steer-by-wire system is provided. The steer-by-wire system includes: a first powerpack having a first motor; a second powerpack having a second motor; and a steering rack operably coupled to the first motor of the first powerpack and the second motor of the second powerpack. The first powerpack further includes: a first electronic control unit (ECU) configured to control the first motor; and a first inverter circuit connected between the first ECU and the first motor. The first inverter circuit includes a plurality of first switches, and the first ECU is configured to dynamically adjust a state of the plurality of first switches based on an operating status of the plurality of first switches and an operating status of the first motor to reduce a first drag torque generated by the first motor.

This application discloses a multi-field coupled dynamics calculation method and related products for superconducting maglev trains. The method includes: determining the operating conditions of the superconducting maglev train simulation model based on its operating state information; predicting the aerodynamic forces of the superconducting maglev train simulation model by calling a response surface fitting model corresponding to the operating conditions, and predicting the electromagnetic forces of the superconducting maglev train simulation model by calling an electromagnetic force model corresponding to the operating conditions; superimposing the corresponding components of the aerodynamic forces and electromagnetic forces to obtain the target load, which includes the target magnetic drag, target levitation force, target guiding force, target magnetic drag torque, target levitation torque, and target guiding torque; and inputting the target load as an external load into the multibody dynamics model to obtain the dynamic response results. Thus, the dynamic response results can effectively reflect the actual motion of the superconducting maglev train under complex operating conditions.

The application discloses a control method of a vehicle emergency braking working condition, computer equipment and a vehicle, and relates to the technical field of engine control, wherein the control method comprises the following steps: determining that the vehicle enters the emergency braking working condition, increasing a preset idle speed of the engine to a first speed threshold, activating idle closed-loop control based on the current speed of the engine and the first speed threshold, obtaining an idle fire path torque under the emergency braking working condition based on the idle closed-loop control, and controlling the engine to output the idle fire path torque. The application can identify the emergency braking working condition of the vehicle, increase the preset idle speed of the engine to the first speed threshold, reduce the phenomenon that the load drag torque is large and the engine output torque is insufficient to meet the stable operation of the idle speed under the emergency braking working condition, reduce the probability of engine stall, and improve the user experience.

The invention relates to a force-feedback steering unit for a motor vehicle, comprising a steering actuator, a control unit, an electric drive unit, and a brake unit, wherein the steering actuator can be operated by an operator to input a steering command, a steering resistance torque can be generated by means of the electric drive unit and / or the brake unit to provide the operator with a driving feel, and an actual base friction torque of the brake unit effective when operating the steering actuator is subject to random change. The invention further relates to a motor vehicle.

The application relates to a two-dimensional rotary table for a ground satellite simulator, wherein a rolling frame is arranged in a driven frame, a cross shaft is arranged in the rolling frame, first bearings are arranged on the two sides of the inside of the driven frame, the two ends of a first rotating shaft of the cross shaft respectively extend out of the back of the rolling frame and are supported through the first bearings, a first brake assembly for limiting the rotation of the first rotating shaft is arranged in the inside of the driven frame, second bearings are arranged at the two ends of the rolling frame, the two ends of a second rotating shaft of the cross shaft are respectively supported through the second bearings, a second brake assembly for limiting the rotation of the second rotating shaft is arranged in the inside of one end of the rolling frame, an installation plate is arranged on the upper end of the driven frame, a reset assembly is arranged on the installation plate, a reset rod is arranged on the upper side of the rolling frame, passes through the installation plate and is reset through the reset assembly, the satellite simulator is installed on the rolling frame, and the driven frame is arranged in an equipment unit frame in a lifting mode. The structural design of the application can reduce the friction resistance moment and can better realize the rolling, yaw and other simulation of the satellite simulator.

The present application relates to wet clutch friction plate technical field, specifically disclose a kind of power shift oil tank wet clutch friction plate mechanism, including annular assembly core plate, the outer side of the annular assembly core plate several annular array distribution friction piece, the friction piece includes first friction strip, second friction strip, third friction strip, fourth friction strip, fifth friction strip and sixth friction strip;Through the cooperation of first oblique slot, second oblique slot, third oblique slot and fourth oblique slot, first triangular groove and second triangular groove and annular groove, the shear resistance of lubricating oil between annular friction plate can be reduced, so that it can be conveniently reduced drag torque;Through first oblique straight-through groove, second oblique straight-through groove, third oblique straight-through groove, fourth oblique straight-through groove and first straight-through groove, the contact area with friction plate can be increased, the residence time of lubricating oil is prolonged, and the heat on the surface of friction plate is better removed, so that the heat dissipation of friction plate is further improved.

This application discloses an actuator, a cover assembly, and a vehicle. The drive mechanism includes a motor and a torque application assembly. The motor includes a motor shaft. The torque application assembly is configured to apply a first torque to the motor shaft when it rotates in a first rotational direction, and not to apply a torque to the motor shaft when it rotates in a second rotational direction; or, it is configured to apply a first torque to the motor shaft when it rotates in the first rotational direction, and apply a second torque to the motor shaft when it rotates in the second rotational direction. The first rotational direction is opposite to the second rotational direction. The first torque is greater than the second torque. Thus, when the motor is not energized, the motor shaft, which is conducive to rotation in the first rotational direction, is self-locked under the action of the first torque, while the motor shaft, which is conducive to rotation in the second rotational direction, is not resisted or continues to rotate under the action of a smaller second torque.

The invention discloses a rotary steerable drilling tool, a posture correction method and system thereof and a medium, and particularly relates to the technical field of oil field drilling engineering, and the method is technically characterized in that the method comprises the steps that the internal friction torque and the eccentric torque of the rotary steerable drilling tool during underground work are obtained; dispersing the drill string into a structural model comprising at least one beam unit by utilizing a finite element method, and analyzing the dynamics of the rotary steering drilling tool by utilizing the structural model in combination with a virtual work principle to obtain a dynamic analysis result of the rotary steering drilling tool; constructing a first relation model by using the internal friction torque, the eccentric torque and the drilling fluid flow; obtaining attitude data of any hole drift angle and a tool face angle of the rotary steering drilling tool, and constructing a second relation model between the theoretical measured value of the well track and the actual measured value of the well track; and constructing a well track correction matrix error model through the first relation model, the second relation model and a preset flow feed-forward compensation algorithm.

The utility model discloses an electric air outlet anti-pinch mechanism and an automobile air outlet device, which comprise a main rotating part driven by an actuator to rotate, an auxiliary rotating part directly or indirectly coupled with an air guide blade, an axial groove arranged on the end face of the main rotating part facing the auxiliary rotating part, and a mounting space arranged on the outer side of the axial groove; the elastic piece is fixed in the mounting space, a protruding elastic protrusion is formed through bending, and the elastic protrusion extends into the axial groove; the slave rotating piece is provided with an access body embedded into the axial groove, and the side face of the access body is provided with a sunken part matched with the elastic protrusion and used for transmitting the torque of the master rotating piece to the slave rotating piece; when the air guide blades are blocked and the resistance torque exceeds the critical holding force between the elastic protrusions and the concave parts, the elastic protrusions are compressed and slide out of the concave parts, the main rotating piece idles relative to the auxiliary rotating piece, torque transmission is cut off, and clamping accidents are avoided. The utility model relates to the technical field of passenger car air conditioning systems.

The application discloses a vehicle speed control method, device and storage medium. Specifically, the real-time vehicle speed of a current vehicle and the unpowered vehicle speed of the current vehicle when an accelerator pedal is released are acquired; if the unpowered vehicle speed is greater than a preset safe vehicle speed limit value, a reverse drag torque is added to the current vehicle according to a preset slow-down gear; a slow-down control mode is determined according to the reverse drag torque, the real-time vehicle speed and the unpowered vehicle speed; and the vehicle speed of the current vehicle is controlled according to the slow-down control mode. Different vehicle speed control modes can be adopted according to different situations, so that the defect of large brake energy consumption caused by the same slow-down mode when downhill and on flat ground in a single control mode is overcome, the brake energy consumption is reduced, the cruising range of an electric vehicle is improved, and the safety of the vehicle in different states is ensured.

The invention discloses a high-resistance anti-galloping carrier roller for a downward belt conveyor, and belongs to the technical field of belt conveyors. The carrier roller comprises an inner roller ring, an outer roller ring and at least one group of elastic floating components which are uniformly distributed in the circumferential direction. The elastic floating assembly is fixed between the inner roller ring and the outer roller ring and provides elastic support. When the descending speed of the conveying belt is increased or the load is increased, the dynamic pressure acting on the outer roller ring is increased, the outer roller ring is forced to compress the elastic floating assembly on one side, and dynamic eccentricity relative to the rotating center of the inner roller ring is generated. And the eccentricity causes non-uniform distribution of contact pressure between the outer roller ring and the conveying belt, so that an additional resistance moment which is opposite to the movement direction and is nonlinearly increased along with the speed and the load is automatically generated, a pure mechanical negative feedback regulation mechanism is formed, and galloping is effectively prevented. The device is simple in structure, high in self-adaption, free of maintenance and high in reliability, and an economical and efficient passive safety solution is provided for the downward belt conveyor.

The utility model relates to a tool for detecting dragging torque and outer contour, which comprises a tool bottom plate, a tool seat, a dragging torque detection unit, an outer contour dimension measurement unit and a data processing and control system, and is characterized in that the tool bottom plate and the tool seat are positioned through a positioning pin and are in threaded connection and fixation; the tool bottom plate is positioned through the diagonal positioning pins and the trimming pins and installed on a workbench. According to the utility model, dragging torque and outer contour detection modes are integrated, the requirements of workpiece carrying and repositioning are reduced, the detection efficiency is greatly improved, the production takt is shortened, and the efficiency and the yield of the whole assembly line are improved. The integrated structural design is adopted, the two parts work cooperatively, detection errors caused by assembly deviation of traditional split type detection equipment are avoided, and the detection precision is remarkably improved.

The present disclosure relates to a wheel speed difference control method and system, a vehicle control unit, an electric vehicle and a medium. The wheel speed difference control method comprises: obtaining a current vehicle speed, a current wheel speed and a current actual output torque of an electric motor; calculating a wheel speed difference between a driving wheel and a following wheel according to the current wheel speed; judging whether to activate a torque pullback function according to the current vehicle speed and the wheel speed difference; determining a target counter-drag torque according to the current actual output torque of the electric motor and a pullback coefficient in the case that the torque pullback function is activated; and requesting the target counter-drag torque to an electric motor controller. The present disclosure can monitor the wheel speed difference trend in real time, and smoothly reduce the wheel speed difference before the ABS is triggered by intelligently adjusting the request strategy of the counter-drag torque, thereby ensuring the continuity and efficiency of the energy recovery process, and improving the driving quality.

The invention is aimed at solving issues of pad suction and drag torque, which occur during driving in disk brake systems. The invention relates to a brake disk for a disk brake system, having at least one friction surface, which is at least sectionally delimited by at least one protrusion, protruding from the at least one friction surface, at an outer circumferential side and / or at an inner circumferential side of the at least one friction surface. The invention also relates to a brake system having a brake disk of this type.

The invention discloses a compressed air energy storage system started by a low-power turbine and a control method, the system comprises a main body module and a starting control module, and a compression unit of the main body module adopts a plurality of sections of independent gas compressors and corresponding driving motors to form a gas compression section group; the driving motor can be controlled to be switched among cut-out, low-torque boosting and rated driving. The starting control module is provided with a starting gas storage container and a low-power starting turbine, an output shaft of the starting turbine applies pull-back torque to the target gas compression section set through an auxiliary power interface, and when the pull-back torque reaches a threshold value, the pull-back torque is seamlessly switched to be driven by the driving motor. The control method comprises the steps of starting condition detection, motor switching-out, turbine driving starting, cooperative acceleration transition, driving mode switching and the like, and soft starting and starting torque peak clipping are achieved. The system has the advantages of being low in starting current, small in mechanical impact, high in reliability, good in expandability and the like, and an efficient solution is provided for engineering application of a high-power compressed air energy storage system.

A method of assisting in deceleration of a motor vehicle during a stop of the motor vehicle, the motor vehicle having a drivetrain including a traction motor, road wheels operably connected to the drivetrain, a friction brake configured to decelerate the road wheels, and an electronic controller, the method including detecting, via the electronic controller, a request to stop the vehicle. The method further includes commanding the traction motor to provide regenerative braking in response to the request to stop the vehicle. The method additionally includes determining a current vehicle operating state. The method further includes determining an amount of braking drag torque to be generated by the friction brake based on the current vehicle operating state. The method also includes commanding application of the determined amount of braking drag torque in parallel with the regenerative braking, thereby operating the friction brake as a mechanical drivetrain damper while assisting the regenerative braking to stop the motor vehicle.

This invention provides a method and system for adaptive torque limiting control of a series hybrid power system engine, relating to the field of vehicle control technology. The method includes the following steps: Step 1: Obtaining the maximum power generation capacity of the power generation system and converting it into the maximum anti-drag torque on the engine; Step 2: Obtaining the real-time actual speed of the engine and comparing it with a preset target speed to calculate the speed deviation; Step 3: Calculating a dynamic torque reserve value based on the speed deviation using a feedforward and closed-loop control algorithm; Step 4: Calculating the real-time maximum allowable target torque of the engine based on the maximum anti-drag torque and the dynamic torque reserve value; Step 5: Limiting the target torque of the engine below the real-time maximum allowable target torque and sending it to the engine control unit for execution.

The present invention provides a variable torque rotating shaft mechanism for small spaces, in which a stopper portion is provided on the rotating shaft, a winding circle and an axial stopper fitting frame are provided on the connecting frame, the winding circle is inserted through the rotating shaft and gap-fitted with the rotating shaft, and the rotating shaft is further provided with a first friction member that rotates synchronously with the rotating shaft, a second friction member that rotates relative to the rotating shaft, and a plurality of disc springs. The disc springs press the first friction member and the second friction member, tightening the friction fitting, and pressing the axial stopper fitting frame of the connecting frame in the positive direction against the first stopper portion. The friction fitting between the first friction member and the second friction member provides a basic resistance torque to the rotating shaft, and the fitting between the winding circle and the rotating shaft outputs a second resistance torque that overlaps with the basic resistance torque within the operating angle range of the corresponding mobile terminal. The present invention can be used in mobile terminals such as notebook PCs, and even under the constraint of requiring a small size, it can reduce the screen shaking time during touch operation while also guaranteeing durability.

The application belongs to the technical field of wind driven generators, and particularly relates to a wind driven generator with an angle adjusting mechanism, which comprises a generator cabin installed at the top of a vertical rod, a blade rotatably connected in a mounting portion, and a mounting portion rotatably connected at the end of the generator cabin; the mounting portion comprises a head, a base, and a transmission shaft; a second spring is added between a servo motor and a lifting plate, which causes greater pressure on the torque of the servo motor, but can break through the magnetic hysteresis resistance torque in the servo motor in the case of shutdown, power failure or failure of the servo motor, so as to rapidly drive the lifting plate to reset, and the reset of the lifting plate to the defined safety position can reduce the response time of the equipment and improve the response speed in the case of extreme weather and servo motor failure, so as to ensure the blade to be feathered, thereby avoiding damage or destruction of the wind driven generator.

A steer-by-wire system is provided. The steer-by-wire system comprises: a first drive unit with a first motor; a second drive unit with a second motor; and a rack and pinion system operationally coupled to the first motor of the first drive unit and the second motor of the second drive unit. The first drive unit further comprises: a first electronic control unit (ECU) configured to control the first motor; and a first inverter circuit connected between the first ECU and the first motor. The first inverter circuit comprises a plurality of first switches, and the first ECU is configured to dynamically adjust the state of the plurality of first switches based on the operating status of the plurality of first switches and the operating status of the first motor, in order to reduce any first drag torque generated by the first motor.

This suppresses the generation of drag torque when starting after releasing the brakes, and also prevents the piston from retracting too far. [Solution] The control unit of the brake device includes a starting detection unit that detects when the vehicle starts moving after stopping based on the vehicle speed detected by the vehicle speed detection unit, a pressure reduction processing unit that operates the brake fluid pressure circuit to reduce the brake pressure in the fluid chamber when the starting detection unit detects when the vehicle starts moving, and a pressure increase processing unit that operates the brake pressure circuit to increase the brake pressure in the fluid chamber when the brake pressure detected by the first brake pressure detection unit falls below a preset first threshold pressure.

A trunk supporting exoskeleton comprises: a supporting trunk; thigh links configured to move in unison with a wearer's thighs; and first and second torque generators located on both left and right halves of the wearer substantially close to the wearer's hip. The torque generators couple the supporting trunk to the thigh links, and generate torque between the thigh links and the supporting trunk. When the wearer bends forward such that a predetermined portion of the supporting trunk passes beyond a predetermined angle from vertical, a torque generator(s) imposes a resisting torque between the supporting trunk and the thigh link(s), causing the supporting trunk to impose a force against the wearer's trunk, and the thigh link(s) to impose a force onto the wearer's thigh. When the predetermined portion does not pass beyond the predetermined angle, the torque generators impose no resisting torques between said supporting trunk and respective thigh links.

This application relates to a vehicle anti-rollback control method, system, and terminal for climbing slopes, belonging to the technical field of vehicle control. The anti-rollback control method includes: reading the physical position state of a three-position self-locking knob; when the driver's current selected mode is forward, acquiring the slope angle of the target slope and calculating the reference resistance torque to prevent backward roll, combined with the vehicle's inherent properties; converting the reference resistance torque into the basic output displacement required by the hydraulic system; acquiring the accelerator pedal opening and mapping it to the driving demand displacement required by the driver; acquiring the brake pedal travel and calculating the braking demand displacement for safe braking; acquiring the real-time engine speed and calculating the protective displacement; selecting the minimum value from the protective displacement, braking demand displacement, and driving demand displacement, and selecting the maximum value from the minimum value and the basic output displacement as the final output displacement of the pump. This application has the beneficial effect of combining the actual vehicle state and being applicable to anti-rollback on different slopes.

The invention provides a commercial vehicle drive-by-wire electro-hydraulic steering road feeling simulation control system and method, a steering resistance moment fusion estimation module fuses a steering resistance moment based on vehicle dynamics and a steering resistance moment based on steering dynamics based on an AKF algorithm, and is used for estimating the steering resistance moment of a commercial vehicle in a driving process; the compensation torque module is used for generating a friction compensation torque, a damping compensation torque and an inertia compensation torque, and introducing a roll compensation torque; the road feeling feedback torque generation module obtains the expected road feeling motor torque according to the torque output by each module, and a sliding mode controller (SMC) is adopted to carry out closed-loop control on the road feeling motor, so that the road feeling motor tracks the expected road feeling torque. According to the method, the estimation precision of the steering resistance torque can be remarkably improved, and more stable and reliable road feeling simulation is provided; by introducing the roll compensation torque, the roll posture of the vehicle body is converted into the torque change of the steering wheel which can be directly perceived by a driver, and the perception capability of the driver on the roll trend and the stable boundary of the vehicle is enhanced.

The invention relates to a utility vehicle assembly (20) for a utility vehicle, comprising a vehicle frame (1), a cab (2) arranged on the vehicle frame (1), and a technical tower (3) arranged on the vehicle frame (1) behind the cab (2) for receiving technical components of the utility vehicle, the technical tower (3) being connected to at least one support frame (12) fastened to the vehicle frame (1), the support frame (5) allows a defined relative movement of the technical tower (3) in the tail direction with respect to the frame (1) after overcoming a drag torque generated by the holding force of the connection.

The application discloses a kind of joint actuators offline detection methods, using joint actuators offline detection equipment is realized, including: installation workpiece and scan code identification information;Initialize sensor;Establish communication and carry out pre-test check;Execute multiple performance tests, including friction resistance, starting torque, torque constant, angle transmission error, back error, repeat positioning accuracy, hysteresis curve and backlash, efficiency and anti-drag torque test;Finally process data and generate report.The detection equipment realizes the automatic docking and separation of joint actuator and detection shaft through sliding platform, accurately applies and measures load using servo motor, torque sensor and grating encoder, and realizes full-process automatic control through host computer, PLC controller and program-controlled power supply.The application has high integration, good automation, and can comprehensively, accurately and efficiently complete the comprehensive performance detection of joint actuator.