297 results about "Steering control" patented technology

This invention provides a vehicle and its steering control method and apparatus, relating to the field of vehicle steering system technology. When detecting the steering intention represented by the steering control signal, this invention simultaneously collects real-time vehicle operating data and the operating status data of each steering system. It comprehensively calculates the total steering demand parameters of the vehicle in the corresponding driving scenario and the steering allocation parameters of each steering system based on its actual working capacity, enabling multiple steering systems to collaboratively execute steering actions according to their own true capabilities. When any steering system malfunctions, the system capable of performing steering can be quickly determined based on the real-time operating status, ensuring that there is always a steering system to perform the steering action, making steering continuous and uninterrupted, and maintaining stable and uninterrupted function. While ensuring vehicle steering smoothness and control precision, this invention also possesses reliable steering fault redundancy capabilities, effectively improving the reliability of vehicle steering control and driving safety.

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.

This invention provides an endoscopic laser resection surgical robot based on a piezoelectrically driven omnidirectional ball. The piezoelectric drive mechanism enables multi-degree-of-freedom rotation of the steering system, thereby driving the fiber optic channel to achieve precise laser steering control, improving surgical flexibility and accuracy. The steering system is connected to the external structure via an elastic support component. This elastic support can apply a preset preload to the steering system while ensuring that the system's free rotation performance is not affected, allowing the steering system to achieve three degrees of freedom rotation in space, corresponding to a conical angle range of ±20° from the half-apex angle.

This application provides a vehicle steering control method, a vehicle, and a storage medium, relating to the field of vehicle technology. The method includes: acquiring vehicle state data and driving state data; determining multi-dimensional state parameters based on the vehicle state data and driving state data, wherein the multi-dimensional state parameters include: driver state score, driving style coefficient, and environmental risk value; determining weight parameters based on the multi-dimensional state parameters, preset rules, and a reinforcement learning model, wherein the preset rules are used to allocate weight parameters under preset scenarios; determining a target steering command based on the weight parameters, driving style coefficient, environmental risk value, system-planned steering angle, and steering wheel angle; and performing vehicle steering control based on the target steering command, driving style coefficient, and the rate of change of the weight parameters. This application solves the technical problems of poor adaptability, insufficient coordination, and scenario mismatch in human-machine co-driving steering control in traditional solutions.

This invention discloses a collaborative steering control method and system for bridge deck construction equipment, relating to the field of bridge construction. The method includes: collecting and analyzing bridge deck construction status data through a bridge deck sensing network to obtain bridge deck construction reference path coordinates; performing multi-axis trajectory tracking calculations on the bridge deck construction equipment to establish an alignment time sequence; using the sequence as a time sequence control anchor point, analyzing the time sequence steering control parameters of the equipment's multiple axes to obtain the steering control parameters of each axis node; and performing target collaboration verification to determine the collaborative steering control strategy for multi-axis collaborative steering control of the bridge deck construction equipment. This application solves the technical problems of high cost and poor equipment coordination in existing collaborative steering control modes for bridge deck construction equipment, which can easily lead to operational conflicts. It achieves the technical effects of reducing the hardware cost of construction equipment, improving the coordination of multi-axis construction equipment, and avoiding path conflicts and driving deadlocks during operation.

The utility model provides a kind of high-precision vibrating bolt screening equipment, belong to bolt screening technical field, including the preliminary screening vibration tank being obliquely arranged on rack, the inner wall of preliminary screening vibration tank is uniformly rotationally arranged with screen roller, synchronous rotating component that drives all adjacent screen roller to rotate in the same direction is arranged on rack, the blanking side of preliminary screening vibration tank is formed gradually narrow discharge slide by the baffle of fixed connection, the outlet of discharge slide is butt joint with the material guide chute being fixed on rack, adopt two-stage screening structure, size pre-screening is realized by screen roller spacing in preliminary screening, high-precision detection is carried out to bolt appearance, defect and other details by image recognition instrument in secondary screening, realize the automatic separation of qualified product and unqualified product in combination with rudder-driven secondary screening groove steering control, detection precision is much higher than traditional manual or single mechanical screening.

The application provides a steering control method and device when automatic driving is taken over, and relates to the technical field of automatic driving. The method comprises the following steps: acquiring a steering force applied on a steering column by a steering machine when a driver takes over; and controlling a power-assisted system to apply a resistance force decreasing over time on the steering machine, so that the steering machine releases the steering force under the action of the resistance force. The application avoids the problem of poor vehicle lateral stability caused by the sudden release of the steering force by the steering machine.

A steering control device according to an embodiment of the present disclosure comprises a control circuit capable of calculating a target steering angle of a host vehicle on the basis of travel data including point sequence data indicating the center position of the road on which the host vehicle is traveling and data on a plurality of travel parameters including the travel speed of the host vehicle. The control circuit can calculate a plurality of time intervals by dividing the distance between adjacent points among a plurality of points included in the point sequence data by the travel speed, predict future travel data when the plurality of time intervals sequentially elapse by using model prediction control on the basis of the travel data, and calculate a target steering angle on the basis of the point sequence data and the predicted future travel data.

The invention relates to an electromechanical steering system (100) with at least one sensor (102) for detecting at least one vehicle dynamics parameter (104), with a steering handle (106), with a steering sensor (110) associated with the steering handle (106), with at least one steering axis (112), with an actuator (114) associated with the steering axis (112), and with a steering control unit (116), wherein the steering sensor (110) is configured to detect a steering command (108) from the steering handle (106), and wherein the steering control unit (116) is configured to convert the detected steering command (108) into a wheel steering angle (118) and to control the actuator (114) such that the actuator (114) adjusts the steering axis (112) proportionally to the wheel steering angle (118), wherein the steering control unit (116) is configured to provide an assistance function (120) to execute a turnaround,in which the actuator (114) adjusts the steering axis (112) in addition to the steering command (108) also based on at least one detected vehicle dynamics parameter (104). The invention also relates to a method for performing a U-turn and a vehicle.

This invention discloses a distributed drive electric vehicle in-situ steering hierarchical cooperative control system and method, belonging to the field of electric vehicle control technology. It includes: real-time acquisition of vehicle state signals, and obtaining the slip ratio and road adhesion coefficient required for in-situ steering control through dynamic calculations; determining the nominal yaw rate and desired wheel speed based on the driver's operating intention, slip ratio, and road adhesion coefficient; obtaining the final drive torque based on the error between the nominal yaw rate and the actual yaw rate, and the error between the desired wheel speed and the actual wheel speed; real-time monitoring of the vehicle state, and when an unstable state is detected, resetting the target nominal yaw rate and final drive torque to zero, and outputting a braking pressure command; converting the final drive torque and braking pressure command into actual execution actions, forming a state feedback closed loop, thereby completing vehicle motion control and achieving precise, stable, and safe control of the in-situ steering process.

1. The name of the design product: cover. 2. The use of the design product: cover for automobile steering control unit PPK. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

The application provides a ROS-based distributed mobile robot visual servo following method, comprising: constructing a distributed heterogeneous control architecture separating an upper computer from a lower computer; the upper computer detects a target through a YOLO model and locks the target to follow, calculates a longitudinal following linear velocity according to a target image feature, encapsulates a linear velocity, a target transverse position, a control parameter and an enable flag bit into a control instruction, and sends the control instruction to the lower computer through a UDP protocol; the lower computer listens to and analyzes the UDP instruction through a ROS node, executes a transverse PD steering control to calculate an angular velocity, combines the longitudinal linear velocity to generate a motion instruction, drives a chassis to execute a following action, and triggers a safety shutdown when the target is lost or communication is abnormal. The application solves the problems of control delay caused by insufficient computing power of an existing single-board computer full-stack scheme, poor robustness in a complex environment and insufficient safety, and realizes high real-time and high-robustness mobile robot visual servo following.

This invention relates to the field of automotive control technology, and specifically to a dynamic compensation control method and system for the following performance of a steer-by-wire system. The method includes: acquiring multi-dimensional core operating signals and performing filtering and standardization preprocessing to obtain basic feature data; using a dual-threshold judgment model to analyze underperformance conditions and capture the evolution trend of these conditions; analyzing the operating status of the actuators and generating a collaborative evolution trajectory through a dual-motor cooperative control model to obtain dual-track evolution information; combining the dual-track evolution information with system hardware parameters, real-time operating feedback data, and dynamic performance thresholds to obtain a scenario-adaptive weight set; employing a multi-parameter coupling enhancement mechanism to obtain precise control core information; and adapting the system's quantitative indicators and iterative optimization requirements through a performance evaluation closed-loop mechanism to obtain parameter optimization results. This solution optimizes steering control through dual-track evolution information and a scenario-adaptive weight set, thereby improving steering control accuracy.

This disclosure provides a system and method for driving multi-mode steering in a vehicle. The system includes a control subsystem, a front-wheel steering subsystem, and a rear-wheel steering subsystem. The control subsystem includes a vehicle controller, an intrinsically safe angle sensor, an intrinsically safe pressure sensor, and an onboard intrinsically safe display screen. The front-wheel steering subsystem includes a steering wheel, an explosion-proof steering motor column assembly, a steering drive shaft, a recirculating ball steering gear, a steering tie rod assembly, a front steering axle assembly, and a front wheel hydraulic circuit branch of a hydraulic pump station. The rear-wheel steering subsystem includes a rear wheel hydraulic circuit branch of a hydraulic pump station, an explosion-proof solenoid valve assembly, and a rear steering axle assembly. The technical solution of this disclosure achieves precise control of multi-mode vehicle steering, adapts to different driving scenarios, improves the flexibility and maneuverability of vehicle steering, and enhances the accuracy and reliability of steering control, ensuring a stable and controllable steering process, thereby improving driving safety and comfort.

A traction and steering control system and method for a small- or zero-radius-turning maintenance vehicle. The traction and steering control system may determine operator intended speed and direction by monitoring positions of speed and directional control members and one or more operational parameters of the vehicle. The vehicle may then generate drive wheel speed commands that achieve the intended speed and direction by determining how best to manipulate the left and right drive wheels. In some instances, the drive wheel speed commands are disproportionately related to the positions of the speed and directional control members.

A control device calculates assistive torque that is directed in a direction corresponding to a roll angular velocity detected by a sensor and has a magnitude corresponding to the roll angular velocity, and controls an actuator that applies the torque to a steering shaft based on the assistive torque. This allows appropriate torque to be applied to the steering shaft of a two-wheeled vehicle while avoiding problems specific to a torque sensor.

The utility model relates to 3C field electronic parts technical field, especially a kind of feeding and discharging use feeding and discharging lifting device, including carrier conveying mechanism and drive mechanism, carrier conveying mechanism includes bottom plate, the top of bottom plate is fixedly connected with guide column, the top center of bottom plate is fixedly connected with bearing block, bearing block is placed with carrier frame, the both sides of carrier frame are provided with adjustable stabilizing component that keep stable;Drive mechanism includes mounting plate, the top of mounting plate is fixedly installed with servo motor, servo motor is connected with the lifting rod that drive carrier frame moves up and down by transmission structure.This utility model discards traditional cylinder drive mode, using servo motor cooperation screw rod drive mechanism: servo motor can realize accurate speed and steering control, screw rod transmission can convert the rotary motion of motor into the smooth linear motion of slider, and transmission gap is small, transmission efficiency is high, finally drive lifting rod stable drive carrier frame to lift.

The application relates to a rear wheel steering control method based on multi-source disturbance generalized stability margin and multi-target elastic constraint, which collects vehicle dynamics state data, driver operation behavior parameters and vehicle-road environment information; in a multi-source disturbance generalized stability margin calculation unit, a vehicle-road environment uncertainty multi-source disturbance excitation model and a driver expected steering characteristic model are fitted to obtain amplitude and phase generalized stability margin; in a limit stability influence law analysis unit, vehicle-road safety evaluation indexes, limit generalized stability analysis results and driver comfort evaluation indexes are calculated; in a multi-target elastic constraint optimization unit, a rear wheel steering vehicle multi-target elastic constraint model is established to obtain vehicle-road steering characteristic prediction results, man-machine front and rear steering cooperation instructions and critical stability domain widening control amounts; rear wheel steering angle control signals are output through a line control rear wheel steering high-order control unit. Compared with the prior art, the application has the advantages of high cooperation, safety and stability.

The present embodiments relate to a steering control device and method. A steering control device may include a communication device configured to receive a steering angle sensing signal from a steering angle sensor installed at a lower part of a rack-pinion gear, a detector configured to detect whether of an inflow of moisture into a steering device based on the steering angle sensing signal and generate moisture detection information if the inflow of moisture is detected, and a controller configured to perform a risk prevention control to prevent risk due to the inflow of moisture based on the moisture detection information.

The application discloses a high-integration angle module for an agricultural vehicle and relates to the technical field of agricultural machinery equipment. The application comprises a framework body, a steering unit is installed at each corner of the framework body, a suspension unit is installed at the output end of the steering unit, a wheel hub motor driving unit is rotatably installed on the suspension unit, the steering unit drives the wheel hub motor driving unit to perform steering control by applying a rotating torque to the suspension unit, wherein the suspension unit comprises a supporting suspension fixed at the output end of the steering unit, and a trailing arm is hingedly connected to the bottom end of the supporting suspension. The application performs geometric optimization design on the suspension unit, the center of the wheel shaft is downwardly offset relative to the main axis of the trailing arm to form a gravity center sinking structure, the upper mounting point of an elastic return member is lowered to shorten the force arm, the vertical displacement amount of the center of the wheel hub motor driving unit is greater than the compression deformation amount of the elastic return member, and the ability of the vehicle to cross obstacles and the passability of the vehicle on complex terrains are significantly enhanced in limited installation space.

A computer-implemented method, when executed by data processing hardware, causes the data processing hardware to perform operations including calibrating a transient steering algorithm using a reference steering ratio, and receiving a first set of vehicle data at the transient steering algorithm. The vehicle data includes one or more of vehicle speed, steering angle, lateral acceleration, yaw rate, and steering wheel torque. The operations include manipulating the reference steering ratio based on a steering angle gradient, determining a phasing gain based on a proportional transient variable and lateral and longitudinal accelerations via the transient steering algorithm, generating a first steering ratio, different from the reference steering ratio, in response to the first set of vehicle data via the transient steering algorithm, and adjusting steering control at the vehicle's steering system based on the first steering ratio.

This utility model relates to a steering drive module for a modular car, comprising a steering housing, a motor, a steering control board, lead wires, and a PH2.0 connector. The rear end of the steering housing has a first mounting bracket. The lower part of the first mounting bracket has a first mounting position for mounting the motor. The upper front end of the first mounting bracket has a second mounting position for mounting the steering control board, placing the steering control board above the motor and electrically connecting them. The upper rear end of the first mounting bracket has a wire-holding groove. The lead wire's solder pad is located on the upper surface of the steering control board. One end of the lead wire is soldered to the solder pad, and the middle part of the lead wire is bent and inserted into the wire-holding groove. The other end of the lead wire extends from the rear end of the steering housing and connects to the PH2.0 connector. This application aims to improve the structure of the steering drive module and reduce production costs.

In a steering system that steers the steering wheels by controlling the steering actuator based on the amount of operation of the steering control member estimated by the operation amount estimation unit, the objective is to steer the steering wheels properly even if the operation amount estimation system, including the operation amount estimation unit, is malfunctioning. [Solution] In this steering system, the steering actuator is controlled based on the estimated operating amount, which is the operating amount of the steering operating member estimated by the operating amount estimation unit. However, if the operating amount estimation system, including the operating amount estimation unit, is abnormal, the steering actuator is controlled based on the sensor operating amount, which is the value detected by the operating amount sensor. As a result, even if the operating amount estimation system is abnormal, the steering wheels can be steered smoothly.

This invention relates to a steering control device and a steering control method. The steering torque control process (M26) includes a process of calculating an operating amount for controlling the steering torque to the target steering torque using a proportional element (M50) and a derivative element (M60) corresponding to the difference between the steering torque and the target steering torque. At least one of the proportional element and the derivative element is provided with an amplification phase controller (M54, M66), which is a controller that amplifies the advance of the phase of the derivative element relative to the phase of the proportional element.

The invention relates to an unmanned logistics vehicle steering control method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring state information and environment information of a vehicle; respective steering cost of various preset steering modes is calculated according to the state information and the environment information, wherein the various preset steering modes comprise Ackerman steering, front and back double-steering and bidirectional driving; the steering mode of the current vehicle is obtained, if the steering mode with the minimum steering cost is different from the current steering mode and the cost difference between the steering mode with the minimum steering cost and the current steering mode is larger than a preset switching threshold value, the steering mode is determined as a target steering mode, and otherwise, the current steering mode is maintained; and controlling the vehicle to run in the target steering mode. By the adoption of the method, the unmanned logistics vehicle can autonomously select the optimal steering mode, frequent mode switching is avoided, and the driving efficiency and smoothness in different scenes are improved.

This invention relates to a method for crossing sharp bends on bridges using a double-turntable bridge-type transport vehicle. The method includes the following steps: Step S1, site survey; Step S2, calculation of turning radius and steel trestle bearing capacity; Step S3, obstacle removal and site leveling; Step S4, steel trestle installation; Step S5, adjustment of the transport vehicle's attitude before crossing the bridge; Step S6, turning across the bridge; Step S7, restoration of the transport vehicle after crossing the bridge; Step S8, dismantling of the steel trestle; Step S9, site restoration. This invention provides a method for crossing sharp bends on bridges using a double-turntable bridge-type transport vehicle, researches and develops such a method, and constructs a core technology system for "bridge-on-bridge" steel trestle composite bearing, dynamic steering control of the double turntables, and full-process safety assurance. It provides technical reference and engineering paradigm for the transportation of large equipment in complex terrain in water conservancy and transportation fields.