459results about "Electrical steering" patented technology

An electric power assisted steering assembly comprises a steering mechanism which operatively connects a steering wheel to the roadwheels of a vehicle, a torque sensing means adapted to produce a first output signal indicative of the torque carried by a portion of the steering mechanism, a means for producing a second output signal indicative from a signal indicative of the angular velocity of the portion of the steering mechanism, an electric motor operatively connected to the steering mechanism, a signal processing unit adapted to receive the two output signals and to produce therefrom an overall torque demand signal representative of a torque to be applied to the steering mechanism by the motor, and a motor drive stage adapted to provide a drive current to the motor responsive to the torque demand signal. The overall torque demand signal includes a damping component that is dependent upon the second output signal. The means for producing the yaw damping component includes a filter having one pole and one zero, and in use the second signal is passed through the filter to produce the damping component, the frequency of the pole and zero being selected such that the filter provides a band between the pole and zero within which the phase of the filtered second signal and the velocity signal are further out of phase or in phase than within the band.

This utility model discloses an electronically controlled steering wheel for an unmanned agricultural vehicle, including a steering wheel body and a steering wheel shaft. A transmission gear is mounted on the steering wheel shaft, which is connected to a driven gear and a driving gear. A mechanism housing is also provided on the outside of the steering wheel shaft at positions corresponding to the driven gear, driving gear, and transmission gear. A partition is provided inside the mechanism housing, with the driving gear and driven gear located on one side of the partition and the driving gear on the other side. When the steering wheel shaft rotates, the transmission gear drives the driven gear to rotate, allowing the steering angle information to be monitored by an angular displacement sensor at all times. A switching push rod can engage or disengage the driving gear with the transmission gear, thereby realizing automatic steering by a stepper motor driving the steering wheel shaft to rotate or manual steering by manually rotating the steering wheel body. The two modes can be switched. The overall transmission structure is simple, facilitating production and subsequent maintenance.

Control device (3) for controlling an electric power steering device (4) which uses a three-phase synchronous motor (2) as a power assistance during a steering operation, comprising the following a rotation position estimation unit (16) that estimates a position of a rotor of the three-phase synchronous motor (2) on the basis of a neutral point potential or a potential of a virtual neutral point of the three-phase synchronous motor (2), and a command signal calculation unit (17) which calculates a command signal to the three-phase synchronous motor (2) on the basis of the position of the rotor which is estimated by the rotation position estimation unit (16), wherein a position signal, detected by a rotary position detector (21) which detects the position of the rotor of the three-phase synchronous motor (2), is input to the control device (3), the command signal calculation unit (17) calculates a command signal to the three-phase synchronous motor (2) either on the basis of the position of the rotor detected by the rotation position detector (21) or the position of the rotor estimated by the rotation position estimation unit (16) and The command signal calculation unit (17) then, when the position signal is abnormal, calculates the command signal to the three-phase synchronous motor (2) on the basis of the position of the rotor, which is estimated by the rotation position estimation unit (16), and wherein Then, when the position of the rotor detected by the rotary position detector (21) generally matches the position of the rotor estimated by the rotary position estimation unit (16), a calculation of the command signal to the three-phase synchronous motor (2) based on the position of the rotor detected by the rotary position detector (21) and a calculation of the command signal to the three-phase synchronous motor (2) based on the position of the rotor estimated by the rotary position estimation unit (16) are exchanged.

A worm gear reducer capable of suppressing the occurrence of unpleasant abnormal noise due to metal-to-metal contact generated at locations other than an engaging portion between wheel teeth and worm teeth is provided. A worm 14 has an annular protruding portion 40 at a portion located on an inside in a radial direction of an inner ring 28, the annular protruding portion 40 having two contact end portions 41 at end portions on both sides in an axial direction of an outer circumferential surface thereof, the two contact end portions restricting further inclination of the worm 14 with respect to the inner ring 28 by coming into contact with an inner circumferential surface of the inner ring 28 when the worm 14 is inclined to a maximum inclination angle θmax, and each of the two contact end portions 41 composed of a convex curved surface.

To provide an electric power steering device which achieves further downsizing and inhibits change in a distance between a worm wheel and a worm shaft.SOLUTION: An electric power steering device includes: a first housing which houses a worm wheel, a worm shaft, and an assist pinion shaft; a second housing which houses the worm wheel and the worm shaft; and a seal member disposed between the first housing and the second housing. An annular protruding part protruding to the other side in a first direction is provided at the other side in the first direction at the first housing. A side surface part configured to fit in the outer periphery side of an outer peripheral surface of the annular protruding part is provided at one side in the first direction at the second housing. The outer peripheral surface of the annular protruding part is provided with a seal member housing groove which is recessed to the radial inner side and houses the seal member.SELECTED DRAWING: Figure 4

This invention discloses a method for calculating steering wheel angle based on a TAS angle sensor, comprising the following steps: Step 1, the signal processing state machine module inside the angle calculation module verifies the validity of each input signal and simultaneously calculates whether the rack is in a stationary state; Step 2: learn the rack end angle; Step 3: calibrate the steering wheel center angle; Step 4: initialize the power steering motor rotor angle and calculate the real-time steering wheel angle and rack position; Step 5: correct the steering wheel angle to obtain the corrected steering wheel angle value. This invention can improve the accuracy of the steering wheel return position, enhance the speed and accuracy of advanced function completion, and improve the driver's driving experience.

The application discloses an EPS motor current monitoring method based on single-resistance time-sharing sampling, relates to the technical field of electric power steering control, and comprises the following steps: sampling two-phase currents flowing through a single sampling resistor respectively; wherein the single sampling resistor is arranged on an inverter bridge DC bus; in a PWM period, the conduction combination of three-phase MOS tubes of the inverter bridge is controlled, so that the two-phase currents of the motor flow through the single sampling resistor in a time-sharing mode, and the two-phase currents are time-sharing sampled in a non-zero vector state; and according to the two-phase currents, a third-phase current is calculated according to the Kirchhoff's current law. The monitoring and time sequence control strategy of the three-phase motor current are realized through single-resistance time-sharing sampling, and the method is suitable for the design of an EPS controller meeting the safety level requirement.

The invention relates to a mechatronic chassis device (6) for a motor vehicle, which comprises a housing (7) and at least one functional element (11) located in the housing (7) and is characterized by means (14) for detecting the ingress of a liquid medium into the housing (7).

A cover for a worm wheel gear box for a steering system and an electric power steering system for a vehicle. The cover comprises a substantially disc or dome shaped cover body configured to cover an opening of the worm wheel gear box. The cover body includes an inner surface configured to face the worm wheel gear box and an opposite outer surface. The cover body includes a sealing portion formed on the inner surface and configured to sealingly engage an outer circumference of the opening of the worm wheel gear box. The cover body includes a first attachment means and a second attachment means for mounting the cover body to the worm wheel gear box. The first attachment means and the second attachment means are provided at substantially diametrically opposed positions of the cover body. The cover body includes a reinforcement structure reinforcing the cover body.

A steering apparatus includes a steering wheel provided in a vehicle, a steering sensor configured to output first and second detection signals corresponding to a rotational displacement of the steering wheel, and a controller configured to identify occurrence of an error in the steering sensor caused by an external magnetic field based on the first and second detection signals, in which the controller identifies the occurrence of the error by comparing a change amount of at least one of the first and second detection signals within a reference time with a reference change amount in response to vehicle start-on and comparing a change rate of at least one of the first and second detection signals within the reference time with a reference change rate of at least one of the first and second detection signals within the reference time.

This invention relates to the field of steering wheel technology and discloses a horizontal steering wheel mechanism and its usage method. The mechanism includes a housing, a drive motor fixedly mounted on the side wall of the housing, a steering motor fixedly mounted at the end of the housing away from the drive motor, a half-shaft fixedly mounted at the output end of the drive motor, a hub fixedly mounted on the outer wall of the half-shaft, and a tire fixedly mounted on the outer wall of the hub. When the hub rotates, it drives the force-applying rod to rotate synchronously and applies a thrust to the lifting block. During the upward movement of the lifting block, it contacts the inclined surface of the tilting block, generating a thrust on the tilting block. Just before the lifting block stops moving upward, it contacts the top inclined surface of the fixed frame, forcing the sliding block to slide. Under the elastic force of the spring, the lifting block generates downward pressure on the tilting ring, providing downward pressure to the tire, increasing the vertical load between the tire and the ground, helping the tire return from a sliding state to a rolling state more quickly, and improving the vehicle's handling stability and driving safety.

According to the present embodiments, provided is a steering actuator comprising a motor, an output shaft connected to a knuckle arm, and a reducer connecting the motor and the output shaft. In addition, according to the present embodiments, provided is a mobility device comprising a steering actuator which comprises a motor, an output shaft connected to a knuckle arm, and a reducer connecting the motor and the output shaft. According to the present embodiments, the steering actuator having a compact structure and capable of improving steering feeling of a driver and the mobility device comprising the steering actuator can be provided.

The invention relates to a method for stabilizing a motor vehicle during emergency braking. For this purpose, direction-alternating micro-steering impulses are automatically superimposed on the steering system during the braking process, which cause a lateral micro-migration of the tire-road contact surface. The micro-steering impulses have an amplitude below that of the steering angle change consciously perceived by the driver and are designed to relieve thermally overloaded contact segments and cyclically engage adjacent, adhesive contact areas. This stabilizes the usable coefficient of friction on the tire contact patch. The procedure helps, particularly in dangerous situations during emergency braking on straight stretches or in curves, to compensate for a decrease in lateral grip and to maintain vehicle stability and steerability.

A steering module device for a vehicle can include a driving unit configured to provide a driving force to a wheel of the vehicle, a suspension unit connected to the driving unit and configured to absorb an impact transmitted from a road surface, and a steering unit connected to the suspension unit, rotatably installed below a frame module coupled to a vehicle body, and configured to adjust a steering angle of the wheel. According to the steering module device for a vehicle, the number and arrangement of first and second platforms can be adjusted, thereby improving the degree of freedom of design, and various types of PBV vehicles can be mass-produced.

The invention discloses a control torque determining method of a motor in a wheel steering system and a rear wheel steering method, the wheel steering system comprises the motor and a rack, the control torque determining method of the motor comprises the steps that input information is acquired, and the input information comprises target parameter information and actual parameter information of the rack or the motor; according to an error between the actual parameter information and the target parameter information, performing proportional-integral-differential operation to obtain a target control torque for controlling the motor, so that the motor drives the rack to move under the control of the target control torque; wherein when the integral operation of the proportional-integral-differential operation is carried out, the integral operation result is limited within a set range, and the set range is related to the error. According to the method for determining the control torque of the motor in the wheel steering system, the operation range of the integral term in PID control is limited, so that overlarge motor control torque and system oscillation caused by excessive accumulation of the integral term are avoided, and the energy consumption of continuously outputting high torque by the motor is reduced.

This invention relates to the field of automotive steering control technology and provides a model predictive control method for steer-by-wire return-to-center based on visual and tactile perception fusion. The method includes: acquiring vehicle state parameters, visual perception parameters, and tactile perception parameters through a vehicle sensor system; identifying the driver's membership in three driving styles based on the acquired parameters, and dynamically adjusting the return-to-center speed coefficient and stability coefficient by introducing visibility correction factors and tactile feedback correction factors; constructing a dynamic reference return-to-center speed by combining visual and tactile perception factors; and finally, using the reference return-to-center speed as the tracking target, generating a smooth return-to-center torque using MPC. This method effectively solves the problems of traditional methods lacking environmental adaptability and real-time interactive feedback, improving the control accuracy, torque smoothness, and personalized driving experience of the vehicle's return-to-center process in complex scenarios.

The application discloses an output shaft structure of an electric driver, the electric driver and a vehicle steering system. The output shaft structure of the electric driver comprises a shaft body extending along an axis, the shaft body having opposite first and second ends, the first end being located in a housing of the electric driver after the output shaft structure is installed in place, wherein the first end is provided with a first matching part, the first matching part has a surface obliquely arranged relative to the axis, and the surface forms a pressing contact with a matching part correspondingly arranged in the housing. The application can enhance the stability and reliability of mechanical locking of the output shaft of the electric driver, and effectively improve the working performance of the electric driver.

A steer-by-wire system comprises: a first drive unit, comprising a first motor with a first motor shaft and a first gear configured to be rotated by a rotation of the first motor shaft; a second drive unit, comprising a second motor with a second motor shaft and a second gear configured to be rotated by a rotation of the second motor shaft; and a rack operationally coupled to the first motor of the first drive unit and the second motor of the second drive unit, the rack being configured to be linearly movable in response to a rotation of at least one of the first motor and the second motor.A processor is configured to identify a linear position of the rack based on a position of the first gear of the first drive unit and a position of the second gear of the second drive unit using a Vernier algorithm.

A steering angle estimation device of an electric steering system. A first operator calculates a yaw rate. a second operator calculates an average value of rear wheel speeds. A Kalman filter predicts a yaw acceleration by filtering the yaw rate. A third operator estimates a steering angle also taking into account a slip angle by using the yaw rate and the yaw acceleration. A weight adjuster adjusts weights of the wheel speeds by averaging rear right and left wheel speeds calculated by the second operator. A multiplication operator multiplies weight values output by the weight adjuster with the steering angle. A steering angle conversion switch outputs a final steering angle by selecting the estimated steering angle output from the multiplication operator or a motor steering angle measured from a motor of a motorized power steering system by the weight values.

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.

The utility model discloses a rear wheel steering gear, including tail casing and main casing, the tail casing is connected with the main casing through the outside screw, be provided with the bearing in the tail casing, the bearing is fixedly installed in the bearing locking stud setting in the main casing through, the inside of bearing is fixed with the main nut through the locking nut, the main nut outer fixed mounting has the pulley, install motor pulley in the tail casing, fixedly install the pulley on motor pulley output shaft, the pulley is connected through the belt between two, the main casing is fixedly installed with motor controller assembly. Utilize screw rod to provide the driving force and self -locking force of the steering execution mechanism of car, and the spatial arrangement is compact, and the degree of integration is high, and the belt tension adjustment is adjusted through the straight pull structure, avoids using idler structure, effectively saves the space and the number of parts.

Rotary steering systems are disclosed. An example method of assembling a steering actuator includes positioning a first bevel gear in engagement with a second bevel gear, applying a torque to rotate the first bevel gear and the second bevel gear, locking a first axial position of the first bevel gear and a second axial position of the second bevel gear in response to the torque satisfying a torque threshold, and adjusting at least one of the first axial position or the second axial position in response to the torque not satisfying the torque threshold.

The present invention relates to a method for shunting a vehicle (100) having a defect (106) at a single-wheel steering adjuster (102) of a driven wheel (104) of the vehicle (100), wherein the torque at the wheel (104) is set according to the steering angle of the opposite wheel (104) of the vehicle (100) for shunting.

The application provides a torque compensation method, device, medium and vehicle of an electric power steering system. The torque compensation method comprises: acquiring vehicle parameters, wherein the vehicle parameters comprise steering wheel speed, steering wheel cumulative rotation amount and steering ball temperature; determining a torque compensation coefficient of the electric power steering system based on the vehicle parameters; and compensating a basic output torque of the electric power steering system based on the torque compensation coefficient to output a power assistance torque. The torque compensation method compensates the basic output torque of the electric power steering system based on the steering wheel speed, the steering wheel cumulative rotation amount and the steering ball temperature, so that the driver can more easily complete steering, and the steering comfort of the driver is improved.

A steering system for a vehicle includes a steering shaft that rotationally operates within a housing and is operable between a manual state and an idle state, and a ratchet assembly that selectively defines a first end stop of the steering shaft and a second end stop of the steering shaft. Conversion of the steering shaft from the idle state to the manual state causes the ratchet assembly to define respective locations of the first end stop and the second end stop relative to the housing. Further, the respective locations of the first end stop and the second end stop are based upon a position of a vehicular steering assembly relative to a vehicle frame and a rotational position of the steering shaft.

The application discloses a light-heat integrated machine and particularly relates to the technical field of photovoltaic power generation, and comprises a light-heat integrated machine body, two photovoltaic panels are fixedly installed on the top of the light-heat integrated machine body, a heat dissipation opening is arranged on one side of the top of the light-heat integrated machine body, the number of the heat dissipation openings is multiple, a chassis is fixedly installed at the bottom of the light-heat integrated machine body, protection baffles are fixedly installed on the front and back sides of the chassis, stationary hydraulic cylinders are fixedly installed at four corners of the chassis, stationary piles are fixedly installed at the bottom ends of output shafts of the stationary hydraulic cylinders, a steering hydraulic cylinder is fixedly installed at the center of the bottom of the chassis, and a connecting seat is fixedly installed at the bottom end of an output shaft of the steering hydraulic cylinder. The light-heat integrated machine is provided with the structures of the stationary hydraulic cylinders, the stationary piles, the steering piles and the walking motors, so that the light-heat integrated machine can realize automatic movement, is convenient to transfer, does not need to be carried by means of auxiliary equipment and is very convenient, and thus is convenient to use and popularize.

This invention discloses a modular agricultural robot chassis adapted to complex operating environments and its control method. The chassis includes a detachable and modular body frame and at least three sets of leg modules. Each set of leg modules integrates a lifting actuator, a steering actuator, a walking unit, and a distributed control and power supply unit, which are independently installed through standardized interfaces. The lifting actuator uses a lead screw self-locking drive, and the distributed sub-controller, combined with attitude sensors, achieves local control and bus coordination, enabling the operating platform to maintain a horizontal position in complex terrain. The walking unit can be replaced with drive wheels or guide wheels, supporting flexible switching between two-wheel drive, three-wheel drive, and four-wheel drive configurations. This invention solves the problems of low modularity, poor versatility, and high energy consumption for leveling in existing chassis, and has the advantages of strong terrain adaptability, self-maintaining posture, convenient disassembly and maintenance, and high control robustness, making it suitable for various agricultural operating scenarios such as hills, mountains, and orchards.

A motor control device includes a plurality of control units corresponding to a plurality of windings (14, 15) provided in a motor (12). The plurality of control units includes a master control unit (20), a slave control unit (30), and at least one abnormality monitoring unit (53, 62, 64). The slave control unit (30) is configured to, after the abnormality monitoring unit (53, 62, 64) detects a communication abnormality between the control units, before determining the communication abnormality, generate a power supply control command value using information acquired through a path other than communication between the control units and maintained in a normal state in which the communication abnormality between the control units is not detected for controlling power supply to the windings (14, 15), and perform backup control for maintaining the power supply control command value.