22 results about "Directional stability" patented technology

The invention discloses a vehicle braking system and method based on electronic hydraulic active pressurization, and belongs to the field of vehicle redundant braking, the vehicle braking system comprises a main braking module and a redundant braking module, the main braking module and the redundant braking module are both connected with an ECU, and the redundant braking module comprises an HCU and two low-pressure energy accumulators; the HCU comprises a pump motor, a front axle pressure regulation and control assembly used for carrying out pressure regulation on the two front wheels and a rear axle pressure regulation and control assembly used for carrying out pressure regulation on the two rear wheels. By the adoption of the vehicle braking system and method based on electronic hydraulic active pressurization, the pressure control modules can be formed on the front axle and the rear axle respectively only through the four electromagnetic valves, so that the low-selection ABS function is achieved when the main braking module fails, the system structure is simplified, the hardware cost and the fault probability are reduced, and the system reliability is improved. And meanwhile, the direction stability and the out-of-control prevention capacity during vehicle braking can still be guaranteed, and the balance of high efficiency and safety is achieved in a redundant braking scene.

This application relates to the field of vehicle equipment technology, and discloses a wheel hub emblem and a vehicle. The base has a mounting groove; a rotating mechanism is disposed within the mounting groove and is rotatably connected to the base around a rotation axis; a counterweight is disposed on the side of the rotating mechanism offset from the rotation axis; the emblem plate includes a front and a back facing each other along a first direction, with the front facing the outside of the vehicle and the back covering the opening of the mounting groove; the emblem plate is rotatably connected to the rotating mechanism around a rotation axis; and a light-emitting unit is disposed on the back side offset from the rotation axis, the light-emitting unit being used to make the emblem plate emit light. The wheel hub emblem provided by this application is less prone to deflection during wheel rotation, improving directional stability.

An aeromechanically stable sabot system that includes a center of gravity that is placed forward of an aerodynamic center of the aeromechanically stable sabot system when in steady-state flight. By placing the center of gravity forwards of the aerodynamic center, the sabot system exhibits positive longitudinal and directional stability. To illustrate, the sabot system and / or portions thereof will return to stable flight after being disturbed in pitch (vertically or about a transverse horizontal axis) or yaw (side to side or about a vertical axis) when traveling horizontally.

The invention provides a brake control method and device of a vehicle, the vehicle and electronic equipment, and the method comprises the steps: determining a real-time slip rate in an ABS based on real-time driving parameters and wheel radiuses of the vehicle; based on the real-time driving parameters and the real-time tire pressure of the vehicle, a preset optimal slip rate range in the ABS is corrected through a preset slip rate correction model; and controlling the vehicle to adjust the brake pressure based on the real-time slip rate and the corrected optimal slip rate range. By adopting the method and the device, the preset optimal slip rate range of the ABS can be dynamically corrected in real time, so that the ABS can play a role more accurately aiming at the actual optimal slip point of the current tire in various tire pressure states, the braking distance is shortened by utilizing the road surface adhesion force to the maximum extent, and the direction stability and the vehicle body controllability during vehicle braking are improved.

This invention relates to the field of aircraft technology, specifically to a vertical takeoff and landing (VTOL) aircraft and its control method. The VTOL aircraft includes a tailless flying wing fuselage. Multiple drag rudders are mounted on the trailing edges of the left and right wing surfaces of the fuselage. These drag rudders can deflect vertically, generating differential drag through asymmetric deflection to provide yaw control torque for the fuselage. A tiltrotor quadcopter system is also mounted on the fuselage. The left and right propellers of the tiltrotor quadcopter system can differentially adjust their speed to further assist in providing yaw control torque. This invention significantly improves the aircraft's crosswind resistance during VTOL by eliminating the vertical takeoff and landing phase, while also achieving better aerodynamic efficiency during level flight. The integrated drag rudders and tiltrotor quadcopter system on the fuselage provide yaw control torque, thereby improving the aircraft's directional stability.

The invention relates to a rear wheel steering control method and system based on a zero side slip angle, and belongs to the technical field of vehicle power control. The rear wheel steering control method based on the zero side slip angle comprises the following steps that a vehicle linear two-degree-of-freedom kinetic model is constructed, and a requested rear wheel steering angle is proportional to a steering wheel steering angle; obtaining a calculation model of the requested rear wheel steering angle of the zero side slip angle; calculating a requested rear wheel rack displacement based on the computational model; rear wheel steering is controlled based on the requested rear wheel rack displacement. According to the method, the direction stability, the track keeping capacity and the active safety of the vehicle under various working conditions can be remarkably improved by directly keeping the side slip angle of the vehicle at zero (or minimum) as a core control target and accurately and coordinately controlling the rear wheel turning angle.

The invention relates to a method for adjusting an external dimension of an autonomous mobile robot (1) having a reconfigurable chassis (22) that allows a change in the external dimension. In the method, the external dimension of the reconfigurable chassis (22) is adjusted using a multi-objective optimization that includes tipping stability, directional stability, and dimensional change efficiency as objective functions. Furthermore, the invention relates to a control device (14) that is designed and programmed to carry out the method, and to an autonomous mobile robot (1) having the reconfigurable chassis (22) and the control device (14).

The invention relates to a method for adjusting an outer dimension of an autonomous mobile robot (1) which has a reconfigurable chassis (22) that allows the outer dimension to be adjusted. According to the method, the outer dimension of the reconfigurable chassis (22) is adjusted using a multi-objective optimization process, the functional objectives of which are an anti-tipping safety function, directional stability, and dimension-adjusting efficiency. The invention also relates to a control device (14) which is designed and programmed to carry out the method and to an autonomous mobile robot (1) comprising the reconfigurable chassis (22) and the control device (14).

The invention discloses a hybrid underwater vehicle which comprises a main cavity, a front flow guide cover and a rear flow guide cover which are respectively arranged at the top end and the bottom end of the main cavity, and a phase change assembly arranged on the outer wall of the main cavity, the double-block gravity center adjusting mechanism is arranged in the main cavity; the outer oil bag, the hydraulic valve assembly and the inner oil cylinder are fixed relative to the main cavity; and a liquid outlet of the phase change component is connected with the outer oil bag and the inner oil cylinder through the hydraulic valve assembly and corresponding pipelines. The gravity center adjusting mechanism of the omni-directional combined balancing weight is adopted, the pitch angle is adjusted through the included angle of the balancing weight, the toppling direction of the hybrid underwater vehicle is controlled through the deviation angle of the symmetric center line of the balancing weight, and in-situ steering can be achieved. In the gliding process, course interference of ocean currents is resisted by setting a roll angle, the stability of the course direction in the gliding process is ensured, one-time adjustment of the in-situ attitude is achieved, and adjustment energy consumption is reduced.

The invention relates to a vehicle dynamics control method for motor vehicles with individual drive (front or rear drive) which serves to shorten the braking distance and to improve driving stability in asymmetric friction coefficient conditions (µ-split). The method is based on software-controlled, alternately side-directed steering impulses, which cause a targeted variation of the wheel normal forces through kinematic lateral displacement as a result of steering angle deflection. The steering impulses are executed in sequential pulse sequences, between which neutral phases with a steering angle of zero are provided. During these phases, an algorithmic evaluation of vehicle dynamics data (yaw rate, deceleration, wheel speed profile) is performed, based on which a decision is made whether the pulse sequence is terminated, repeated or continued in a graded escalation logic. The process works independently of ABS or brake interventions, requires no additional hardware and can be fully integrated into existing electronic control units using software. It enables adaptive, driving-condition-dependent brake force distribution, increases directional stability and shortens the braking distance, especially on smooth or asymmetrically gripping road surfaces.

This application provides a shock absorber control method and device, a vehicle, and a storage medium, belonging to the field of vehicle control technology. The method includes: acquiring current vehicle operating data; identifying the vehicle's operating mode based on the current operating data to obtain the current vehicle operating mode; if the current vehicle operating mode is a launch start mode, acquiring the current damping coefficient of the front axle shock absorber to obtain the current front axle damping coefficient; searching for a target front axle current from a preset front axle current mapping table based on the current front axle damping coefficient, wherein the damping coefficient of the target front axle current is less than the current front axle damping coefficient; and outputting the target front axle current to the front axle shock absorber. This reduces the damping coefficient of the front axle shock absorber when the vehicle is in a launch start state, thereby increasing the friction between the tires and the ground. It solves the problem that during a launch start, the vehicle will "lift its head," leading to increased tire slippage and affecting the vehicle's directional stability.

The utility model discloses slitting equipment for steel belt processing, which comprises a cutting frame, a compression roller guide mechanism, a compression roller adjusting mechanism and an adjusting auxiliary mechanism, and the compression roller guide mechanism comprises a lateral frame, a steel belt coil, a guide roller, a compression roller and a rotating plate. The pressing roller adjusting mechanism comprises an adjusting disc, an adjusting hole, a clamping pipe, a clamping rod, an annular step groove, a stretching spring rod, a rotating sleeve and a plugging plate, the pressing roller guiding mechanism effectively solves the problem that steel belt conveying in traditional equipment is unstable, a steel belt coil is rotationally installed on the lateral frame, stable releasing of the steel belt is achieved, and the service life of the steel belt is prolonged. The limiting plates at the two ends of the guide roller make contact with the two ends of the steel belt, transverse movement of the steel belt is prevented, the directional stability of the steel belt is guaranteed, the multiple sets of adjusting holes are formed in the adjusting disc, an operator can select proper pressure positions according to different steel belt materials, and the position of the pressing roller is rapidly and accurately locked through the matched clamping design of the clamping rod and the clamping pipe.

The present invention discloses a vehicle braking system and braking method based on electronic hydraulic active supercharging, belonging to the field of vehicle redundant braking. The system includes a main brake module and a redundant brake module, both of which are connected to the ECU. The redundant brake module includes an HCU and two low-pressure accumulators. The HCU includes a pump motor, a front axle pressure control assembly for regulating pressure on the two front wheels, and a rear axle pressure control assembly for regulating pressure on the two rear wheels. Using the above-mentioned vehicle braking system and braking method based on electronic hydraulic active supercharging, pressure control modules can be formed on the front and rear axles respectively using only four solenoid valves, thereby achieving a low-select ABS function when the main brake module fails. This simplifies the system structure, reduces hardware costs and the probability of failure, while still ensuring the vehicle's directional stability and anti-loss of control capabilities during braking, achieving a balance between efficiency and safety in redundant braking scenarios.

The present application relates to the technical field of vehicle braking control, in particular to a vehicle anti-lock braking control method based on wheel speed difference and deceleration feedback, comprising: processing the longitudinal acceleration signal through a recursive observer to obtain an accurate vehicle mass center estimated longitudinal deceleration, and dynamically correcting the real-time slip rate calculated based on the wheel speed with the same to obtain a corrected slip rate that more accurately reflects the current road adhesion state. At the same time, the real-time wheel speed difference ratio of the coaxial wheels is calculated, which is fused with the corrected slip rate in a decision model to jointly decide the target braking pressure of each wheel, and finally to realize independent closed-loop adjustment of the braking pressure of each wheel. The method can effectively improve the identification accuracy and adaptability of the system to different adhesion road surfaces, and take into account the braking efficiency and directional stability during braking.

The invention provides a vehicle direction stability control method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining a steering wheel angular velocity signal of a vehicle and transverse offset distance information of the vehicle when it is detected that an automatic emergency braking system of the vehicle is triggered and the deceleration of the vehicle is greater than a preset threshold value; calculating a first yaw angle of the vehicle according to the steering wheel angular velocity signal, and calculating a second yaw angle of the vehicle according to the lateral offset distance information; performing fusion calculation on the first yaw angle and the second yaw angle to obtain a target yaw angle of the vehicle; and calculating a target compensation angle of the vehicle according to the target yaw angle, and performing direction correction on the vehicle according to the target compensation angle. The method can ensure that the vehicle can stably decelerate along a straight line under various working conditions, and improves the accuracy, timeliness and robustness of direction stability control in the vehicle braking process.

This utility model discloses a novel large-scale lifting device for automobiles, comprising a drive frame and a lifting belt. The lifting belt is arranged along the length of the lifting device, with one end connected to a drive assembly and the other end connected to a driven pulley assembly. The drive assembly includes a drive motor, a lifting pulley, and a lifting pulley mounting shaft. The drive motor is mounted on the outside of the drive frame and is directly connected to the lifting pulley mounting shaft. The lifting pulley mounting shaft is supported and fixed on a motor mounting base by two bearing seats. The lifting pulley is connected to the lifting pulley mounting shaft through two tensioning sleeves, and the lifting belt is wound around the lifting pulley. This novel large-scale lifting device for automobiles not only simplifies the structure and reduces the frame size, but also exhibits higher stability in the width direction than in the length direction when used on a production line, facilitating production.

Disclosed are an electric vehicle control method, a vehicle controller, and an electric vehicle. The control method is used for controlling an electric vehicle when a blowout occurs at one wheel while the electric vehicle is traveling at a speed greater than a preset vehicle speed. The control method comprises: at a first moment after a blowout occurs at one wheel of an electric vehicle, controlling to reduce the driving torque of the wheel and controlling to reduce the braking force outputted to the wheel by a braking system of the electric vehicle. The control method can quickly adjust the torque and braking force, quickly reset the driving torque and braking force, fully utilize a lateral force friction limit, provide sufficient margin for steering lateral force, and facilitate directional stability control, thereby improving vehicle safety.

The invention discloses a power-assisted steering control method and system, a vehicle, a storage medium and electronic equipment. By introducing a load signal and performing cooperative processing with a vehicle speed signal, power-assisted steering control is expanded to load and vehicle speed two-dimensional self-adaptive adjustment from a single dimension only depending on the vehicle speed, and the problems that the steering hand feeling of a commercial vehicle flutters in a no-load state and is heavy in a full load state due to large load change are solved. By sensing the load in real time and dynamically adjusting the power-assisted curve, the consistent, linear and predictable steering hand feeling can be provided for a driver in the whole vehicle speed range (from low-speed vehicle moving to high-speed cruising) no matter the vehicle is in a no-load state, a full-load state or other intermediate load states. The driving comfort is improved, the fatigue of a driver is relieved, and the driving safety is remarkably improved by enhancing the direction stability of the vehicle under various loads.

The invention discloses a front axle reinforced redundant braking method based on active slip angle adjustment and electric braking, and aims to solve the problem of insufficient electric redundant braking force under the working condition of large braking force demand of a front axle. Comprising the steps of receiving a braking instruction and calculating braking force of each wheel; judging whether left front wheel and right front wheel brakes fail or not; and if a certain wheel breaks down, redundant braking control over the wheel is carried out. The redundant braking control process comprises the steps that if the electric redundant braking force can be met, redundant braking is conducted on the faulty wheels in an electric braking mode, and friction braking is still conducted on the non-faulty wheels in an electromechanical braking mode; if not, the maximum electric redundant braking force is applied to the two front wheels for braking, and meanwhile an enhanced braking mode based on a wheel lateral force longitudinal component generated based on active slip angle adjustment is introduced for redundant braking; meanwhile, when the vehicle body deflects, the mechanical braking force of the two rear wheels is adjusted in real time, additional yawing force is generated to rectify the vehicle body, and the stability of the braking direction is enhanced.

A device suitable for multi-stage riding track slope slip form traction turning comprises a fixed pulley assembly, the fixed pulley assembly comprises a fixed plate, a vertical plate is arranged on the fixed plate, a bearing is arranged on the vertical plate, a pulley is arranged on the bearing, and a groove is formed in the pulley. A base is arranged below the fixed pulley assembly and comprises a bottom plate, the bottom plate is fixed to a riding track, a middle plate is arranged on the bottom plate, a top plate is arranged on the middle plate, and the top plate is fixed to a fixing plate of the fixed pulley assembly. The overall installation position is flexible and is adjusted according to actual conditions, so that the direction of the traction steel wire rope and the running direction of the slip form are adjusted to be consistent, abrasion of the traction steel wire rope is avoided, smooth running of the slip form is guaranteed, cross interference between the traction steel wire rope crossing a riding track and the riding track is effectively prevented, and the direction stability of the slip form in the lifting process can be guaranteed. Therefore, in the construction of the multi-stage riding track high-side concrete panel, the convenience of construction by adopting the efficient slip form system is achieved.

This invention relates to the field of vehicle suspension technology, and discloses a corner module suspension device and a vehicle, comprising: a first steering knuckle; the first steering knuckle being rotatably disposed around a second steering knuckle; a control arm assembly connected to the second steering knuckle, the control arm assembly including an upper control arm, the connecting portion of the upper control arm being movably connected to the second steering knuckle; a steering drive fixed to the second steering knuckle, the steering drive being drive-driven connected to the first steering knuckle; in the vertical direction, the orthographic projection of the steering drive and the orthographic projection of the connecting portion are spaced apart, and in the left-right direction, the orthographic projection of the connecting portion is located outside the inner edge of the orthographic projection of the drive. Thus, by separating the orthographic projection of the drive and the orthographic projection of the connecting portion, the kingpin axis of the steering drive and the kingpin axis of the suspension structure can be separated, which helps to reduce the wheel center kingpin offset and the contact point kingpin offset, improving the vehicle's directional stability and braking stability.

FIELD: mechanical engineering.SUBSTANCE: three-wheeled vehicles used in mountainous conditions, invention can be applied in the design of tricycles. The tricycle for mountain farms with an automatic stability control system has a single front steering wheel and symmetrically located rear drive motor wheels with individual drive. The tricycle's automatic stability control system contains: a roll sensor, a sensor for measuring the angular velocity of the tricycle's rotation around the vertical axis, a lateral acceleration sensor, a control unit, and an actuator. The actuator of the automatic stability control system is a complex unit with an individual drive for each motor-wheel, which structurally includes an engine that provides traction and braking modes.EFFECT: improves the tricycle's directional stability when performing transport operations along specified slope contours and, as a result, eliminates the development of soil erosion processes.1 cl, 5 dwg