99results about How to "Improve driving stability" patented technology

The invention relates to an agricultural robot, and discloses an animal husbandry pushing robot autonomous navigation method based on a laser radar, which comprises a microsecond-level multi-sensor time synchronization architecture based on an FPGA (Field Programmable Gate Array); in a navigation layer, seamless switching between the GNSS and the laser SLAM is realized by constructing a virtual fusion observation value by utilizing extended Kalman filtering and a self-adaptive dynamic weight algorithm; in the sensing layer, an RGB-I multi-mode model fused with laser reflectivity and a biological micro-motion detection technology are adopted, and feed and biological obstacles are accurately distinguished; and in the execution layer, flexible self-adaptive material pushing is achieved in combination with material groove edge fitting and force-position hybrid control, and the navigation precision, the operation quality and the safety of the material pushing robot in the all-weather and unstructured pasture environment are effectively improved.

The invention relates to the technical field of vehicle control, and discloses a vehicle scheduling method and device, a vehicle and a storage medium, and the method comprises the steps: obtaining the driving state information of a vehicle before the vehicle is driven to an intersection without traffic lights, and obtaining the relative positions and predicted driving path information of other vehicles in a current intersection region; in each sampling period, determining a corresponding multi-objective optimization function based on the traffic interaction scene where the vehicle is located; wherein the traffic interaction scene is determined based on the driving state information of the vehicle and the relative positions and predicted driving path information of other vehicles; constructing a vehicle longitudinal dynamic model based on the driving state information of the vehicle, and constructing a model prediction control problem in combination with a multi-objective optimization function and a safety constraint condition; and solving the model prediction control problem to obtain a target control input sequence in a control time domain, and outputting the first control input quantity in the target control input sequence to an execution mechanism of the own vehicle to realize real-time regulation and control of the own vehicle.

This application discloses an underground multi-line intersecting battery-powered vehicle track, relating to the field of track technology. It includes several base plates, on which two sets of intersecting tracks are arranged, each track comprising an inner rail and an outer rail. A diamond-shaped plate is provided at the intersection of the rubber sections of the two sets of tracks, and each diamond-shaped plate has four transition plates. The transition plates are staggered with the inner rails located at both ends of the diamond-shaped plate. A directional rail, which can conform to the inner wall of the outer rail, is provided on both sides of the base plate. A control box for driving the directional rails to move is provided on the base plate. The diamond-shaped plate and its four transition plates at the track intersection can precisely guide the battery-powered vehicle wheels during track changes, allowing the wheels to smoothly transition from the original track to the target track. The directional rails on both sides of the base plate, which can move horizontally, cooperate with the control box that drives their movement to automate the track-changing operation, greatly simplifying the track-changing process, reducing track-changing time, and simultaneously reducing the safety risks associated with manual operation.

The invention discloses an electromagnetic suspension based on a planetary roller screw and a permanent magnet fault-tolerant motor, and belongs to the technical field of vehicle suspensions and motor driving. The electromagnetic suspension comprises a permanent magnet fault-tolerant motor, a reverse planetary roller screw and a spring. The permanent magnet fault-tolerant motor serves as a driving source, a rotor of the permanent magnet fault-tolerant motor is integrated with the lead screw nut, the permanent magnet fault-tolerant motor rotates to enable the pin rollers to rotate and revolve around the lead screw at the same time, then the rotating motion is converted into linear motion of the lead screw, and therefore axial acting force is output. The spring is connected with the shell and the lower connector, mainly bears the static weight of the vehicle body and has a synergistic effect with the acting force output by the motor. The device is compact in structure, high in transmission efficiency, good in fault-tolerant operation capacity, good in reliability, high in road impact resistance and capable of effectively restraining vibration of a vehicle body.

The utility model discloses a kind of self-propelled crane track adjusting devices, comprising: transmission assembly, including support seat, the support seat is symmetrically provided with two groups, two groups the support seat between being provided with base, the top and bottom of the support seat rotatably install auxiliary wheel;Adjusting group frame, including slide, the slide and support seat end inner wall cooperation sliding connection, the inner wall of the slide is connected with the first axle rotation adjusting wheel, the slide is telescopic with the inner wall of support seat telescopic adjustment position;Track, the track is engaged with auxiliary wheel, adjusting wheel, it is related to track adjusting device technical field, through the power transmission structure of beehive gear and lead screw, screw sleeve, the guiding effect of cooperation guide rib and sliding slot, the accurate, convenient adjustment of track tension is realized, adjustment process is stable, avoid the adjustment failure caused by slide deviation, simultaneously without disassembling component, operation efficiency is high.

The application relates to a smart chassis domain control method, system, vehicle and medium considering random interference. The chassis control domain method comprises the following steps: calculating a working condition expected value of a vehicle according to a reference track. A state equation with random disturbance is constructed, an information exchange mode of four subsystems of the vehicle is set, an optimal output sequence of a subsystem perturbation vector is solved through quadratic programming, an actual control amount is obtained, and finally, front and rear wheel steering angles, four-wheel driving torques and active suspension forces are obtained by distributing the actual control amount. Through the dynamic modeling of a two-freedom vehicle under a compound working condition, the theoretical reference value of the smart chassis is solved, the influence of external random disturbance on the execution subsystem of the smart chassis is considered, the dynamic state equation of the smart chassis is constructed, the actual control amount of the smart chassis is solved based on the cooperative game idea, and the driving stability and safety of the smart chassis are greatly improved.

The utility model provides a kind of liftable chassis structure suitable for shifting robot, for the existing shifting robot structure is mostly single-layer chassis design, limited to its rear structure is higher, it is difficult to seamlessly dock with different height sickbed, this paper designs a kind of new liftable chassis structure suitable for shifting robot to effectively conquer existing robot rear structure is too high, difficult to insert bed body and other difficult problems.When shifting robot moves to patient bedside, under the drive of vertical motor, the seat plate is located on the bed surface, which facilitates nursing staff to place the patient on the shifting robot, while ensuring the balance of the robot;When the shifting robot is running on a smooth road, under the drive of the horizontal motor, the seat plate is smoothly docked through the horizontal movement of the first chassis, effectively improving the convenience and comfort of patient transfer.The rear wheel and the horizontal shifting mechanism are fixed on the second chassis, which improves the driving stability and structural reliability.

The invention relates to the technical field of tricycles, in particular to a windproof control system of a tricycle. The tricycle windproof control system comprises the controller, the wind speed sensor and the speed limiting module, the wind speed sensor and the speed limiting module are in communication connection with the controller, the high-precision wind speed sensor is used for collecting the environment wind speed in real time, and the controller automatically judges the wind power level and the vehicle rollover risk; and when risks exist, the controller carries out speed limiting control on a vehicle power part through the speed limiting module, and the upper limit of the vehicle speed is dynamically adjusted. According to the scheme, automatic monitoring, risk pre-judgment and active speed limiting of the driving safety of the tricycle in the strong wind environment are achieved, the driving stability and the rollover resistance of the tricycle are effectively improved, and the system is simple in structure, rapid in response, high in reliability and high in practicability.

A folding wheelchair joint locking structure comprises a fixing seat, a supporting rod, a limiting rod and an extension spring, the fixing seat is fixed to a rear supporting frame, one end of the supporting rod is hinged to a front supporting frame to form a hinged end, the other end of the supporting rod is in sliding fit with the fixing seat to form a movable end, the limiting rod is installed on the fixing seat, and the extension spring is installed on the limiting rod. One end of the extension spring is hooked to the end of the fixing base, the other end of the extension spring is hooked to the movable end of the supporting rod, a double-locking mechanism is achieved through the fixing base, the supporting rod, the limiting rod and the extension spring, and use safety and driving stability are remarkably improved. During folding, the supporting rods are automatically clamped into the positioning grooves to form self-locking, and accidental unfolding caused by carrying vibration is effectively prevented; during unfolding, the limiting rods and the extension springs cooperate to ensure that the front supporting frame and the rear supporting frame are stably unfolded during driving of the joint parts, the stability is improved, the technical defect of joint locking of an existing wheelchair is overcome, and the user experience is improved.

This utility model relates to a highly reliable anti-disengagement sealing structure for automotive wheel bearings, belonging to the field of automotive parts technology. It includes a wheel hub, with a drive shaft fitted inside the hub, and a wheel bearing positioned between the drive shaft and the hub. The wheel bearing includes an outer ring, within which are a pair of mirror-symmetrically distributed inner rings. Sealing ring assemblies are provided between the outer ring and the inner rings at both ends. The sealing ring assembly includes an outer skeleton fitted with the outer ring, an inner skeleton fitted with the inner ring between the outer skeleton and the inner ring, a sealing lip II that is fixedly connected to the outer skeleton at its front end, and a sealing lip I that is fixedly connected to the outer skeleton at its front end. This design features highly reliable sealing, an anti-disengagement design, extended service life, and improved driving safety. It significantly improves the reliability of the seal and the stability of the structure, effectively preventing the seal from disengaging, thereby extending the service life of the wheel bearing and ensuring driving safety.

The utility model relates to a steering transmission mechanism of automobile, including cam, left and right cam push rod, cam axle, cam frame, its characterized in that cam axle (5) is fixed on the steering gear housing, axial and automobile steering axle parallel, especially to the steering trapezoidal transmission mechanism improved steering transmission mechanism. The mechanism is composed of cam, left and right cam push rod, cam axle, cam frame. The mechanism makes automobile steering each wheel all make pure rolling through the realization real-time variable cross tie rod spacing, effectively reduces the additional resistance of automobile travel, lightens the sideslip of vehicle, further improves automobile travel stability and driving comfort, and lightens tire wear.

The utility model discloses a railway crossing curve track gauge adjusting device relates to railway engineering technical field, it includes the screw rod of transverse between concrete integral ballast bed and steel rail, one end of screw rod is equipped with the pad iron, and the other end inserts and is equipped in the iron block, and the screw rod is equipped with flat washer, spring washer and nut assembly between the iron block and the pad iron. Compared with prior art, the utility model provides a railway crossing curve track gauge adjusting device that can maintain track gauge stability for a long time and reduce maintenance cost.

The invention relates to a mobile transport system for transporting objects, comprising a base frame, a left drive unit and a right drive unit. Here, the drive units are mounted so as to be movable in the vertical direction relative to the base frame. Each drive unit has a plurality of rollers which are each rotatable relative to the drive unit about a rotational axis which extends in the longitudinal direction. The base frame has a plurality of guide slots which extend in the vertical direction, the rollers of the drive units running on the inner walls of the guide slots of the base frame.

The utility model provides a kind of buffer device of automobile shock absorber, it is related to automobile shock absorber technical field, and it includes: fixed seat, first connecting support, protection assembly, buffer assembly, second connecting support and connecting hole;The protection assembly includes base, protective shell and T-shaped guide slot;The buffer assembly includes mounting seat, damper, spring, top block and T-shaped guide block.The utility model can when vehicle travels and meets bump or obstacle, impact force is passed to second connecting support by suspension and is passed to top block, top block drives T-shaped guide block to slide along T-shaped guide slot, spring is compressed to absorb energy, damper shrinks to consume energy, ensure top block movement stability by T-shaped guide block and T-shaped guide slot cooperation, reduce abrasion and prolong life, spring and damper collaborative work improve buffering effect, improve driving stability and ride comfort, and protection assembly effectively blocks impurity to ensure reliability.

A vehicle suspension system includes a pair of torsion spring shafts, a first torsion spring shaft end of each of the pair of torsion spring shafts being connected to a left wheel and a right wheel of a vehicle, respectively, and a second torsion spring shaft end of each of the pair of torsion spring shafts, second torsion spring shaft ends of each of the pair of torsion spring shafts extend in the vehicle width direction so as to symmetrically face each other; and a connecting bracket fixedly connecting the mutually facing second torsion spring shaft ends of the pair of torsion spring shafts.

The invention relates to a precipitated silica, characterized in that it has the following physico-chemical parameters: The precipitated silica according to the invention is produced by the following method: a) initial charge of an aqueous solution of organic and / or inorganic salts and / or alkali and / or alkaline earth silicates and / or organic and / or inorganic bases with pH > 9, b) simultaneous metering of water glass and acidifying agent to this initial charge while stirring at 80 to 98°C for 60 to 120 minutes, c) then stopping the addition of water glass and metering the acid only in smaller amounts than before in order to bring the pH of the mixture (measured at 60°C) to 9.0 to 10.0, d) then stirring the mixture at high temperature > 85°C for 45 minutes to 200 minutes without further addition of reactants, e) acidification using sulfuric acid to a pH of about 3.5 to 4.5 (measured at 60°C) and f) filtration, drying to < 8% loss on drying and then granulation of the mixture. The silica according to the invention can be used for the production of rubber mixtures, in particular for the production of tyres, cable sheaths, hoses, drive belts, conveyor belts, roller coverings, shoe soles, gasket elements and damping elements.

A split type coal mining machine carrier includes an explosion-proof power source vehicle and a self-driving carrying platform, and a synchronous walking control mechanism is arranged between the explosion-proof power source vehicle and the self-driving carrying platform, the synchronous walking control mechanism includes a buffer connection control device and a synchronous walking control system, the buffer connection control device is a buffer connecting rod, includes a first rod body and a second rod body, a buffer oil cylinder is arranged between the first rod body and the second rod body, first and second hinged pieces for connecting front and rear vehicles are respectively arranged at the ends of the first rod body and the second rod body away from the buffer oil cylinder, and the first rod body and the second rod body are mutually inserted, and the cross section of the insertion interface is square, the beneficial effects of the present application are that through the design of the synchronous walking control mechanism and the speed synchronization method, the coordinated movement of the explosion-proof power source vehicle and the self-driving carrying platform is realized, and the driving stability and operation efficiency of the coal mining machine carrier are significantly improved.

The invention relates to a method of operating a vehicle, including generating a minimal risk maneuver request of the vehicle in response to a determination that there is an abnormality in a state of the vehicle, in response to the minimal risk maneuver request being generated, selecting a minimal risk maneuver type from among a plurality of minimal risk maneuver types based on the state of the vehicle, and performing a minimal risk maneuver based on the selected minimal risk maneuver type.

The application discloses a caterpillar self-propelled rotary cultivator, which comprises a chassis system, a power system, a transmission system and a rotary cultivator device. The chassis system comprises a frame assembly, a walking driving mechanism and a walking caterpillar assembly. The walking driving mechanism comprises a gearbox arranged at the front end of the frame assembly. The walking caterpillar assembly comprises caterpillars arranged at the left and right sides of the frame assembly, a driving wheel drivingly connected with the output end of the gearbox, rear wheels supporting the caterpillars and a plurality of supporting wheels. The power system comprises an engine and a fuel tank. The engine is arranged on the frame assembly and drivingly connected with the output end of the gearbox. The fuel tank is arranged on the frame assembly. The transmission system comprises a PTO transmission box and a rear output transmission shaft. The input end of the PTO transmission box is drivingly connected with the output end of the engine, and the rear output end of the PTO transmission box is connected with the rear output transmission shaft. The rotary cultivator device is arranged at the tail of the chassis system. Compared with the prior art, the application realizes comprehensive improvement in power transmission, structural layout, driving experience and operation adaptability.

A control device for a roll vehicle includes: an acquisition unit that acquires a target roll angle of a vehicle body in a vehicle width direction determined in accordance with a driving operation state of the roll vehicle, an actual roll angle of the vehicle body in the vehicle width direction that can vary in accordance with roll stiffness generated by a suspension, and a deviation of the target roll angle from the actual roll angle; a determination unit that determines an output value of a roll drive unit in accordance with a first torque value that resists the roll stiffness generated in correspondence with the actual roll angle and a second torque value that is generated in a manner to eliminate the deviation; and a drive control unit that performs control of the roll drive unit in accordance with the output value.

The invention discloses a suspension angle module, a chassis structure, a new energy vehicle and a control method.The suspension angle module comprises a lower swing arm mechanism and a steering seat, the front end of the lower swing arm mechanism is connected with the bottom of the steering seat through a ball head structure, and a hub and a tire are installed at the center of the steering seat through bearing parts; the rear end of the lower swing arm mechanism is rotationally connected with the vehicle body through a bearing piece, and the steering base can swing up and down relative to the vehicle body in the mode that the lower swing arm mechanism serves as a swing arm. A front arm is arranged on the steering base in the direction of a vehicle head, the front end of the front arm is connected with the steering base through a ball head structure, a front arm adjusting component is arranged at the rear end of the front arm, the front arm adjusting component can adjust the in-out stroke of the front arm, and the direction angle adjusting operation of the steering base and wheels is achieved.

The application discloses a 3D printing robot crawler device with an automatic tensioning mechanism and belongs to the technical field of 3D printing robots. The application comprises a chassis rack for bearing a 3D printing robot, two first fixing plates fixedly connected to the side walls of the two sides of the chassis rack, four symmetrically arranged driving wheels rotatably connected to the first fixing plates and symmetrically arranged on the left and right sides, a crawler body sleeved on the driving wheels, a tensioning assembly installed on the first fixing plates and used for tensioning the crawler body, and a cleaning assembly installed on the bottom of the chassis rack. The crawler can automatically adjust the tightness when running on a concave-convex road surface, avoids derailment and deviation during turning, buffers the impact force of road bumps, reduces the shaking of the 3D printing equipment above, reduces the shaking of the printing nozzle, avoids the mispositioning of the printing wall body and the poor formation of the printing wall body, and does not need manual adjustment of the tightness of the crawler.

This invention discloses a rear strut assembly structure, a vehicle, and its design method. It includes a rear strut inner plate fixed to the outer rear wheel arch panel and a rear wheel arch inner plate reinforcing plate fixed to the inner rear wheel arch panel. A rear strut support plate, a rear strut corner plate, a rear strut upper reinforcing plate, and a roof rear crossbeam lower plate are fixed to the inner rear strut panel. The rear strut support plate is arranged at an acute angle, and the rear strut support plate and the rear strut corner plate are fixedly connected by a rear strut connecting plate. The rear strut upper reinforcing plate is fixed to the rear strut support plate, and the two are arranged at an obtuse angle. The roof rear crossbeam lower plate and the rear strut inner plate are fixed, and the roof rear crossbeam lower plate and the rear strut upper reinforcing plate are arranged at an obtuse angle. The rear strut corner plate has a quadrilateral cross-sectional shape. The outer rear wheel arch panel and the rear strut support plate overlap in the Y direction. The rear wheel arch inner plate reinforcing plate, the rear strut support plate, and the roof rear crossbeam lower plate are arranged in a C-shape. This invention can improve the bending and torsional rigidity of the body-in-white during the project development stage.

The invention is suitable for the technical field of automobile aerodynamics, and provides a self-adaptive flexible spoiler experimental development method under a yaw working condition, and the method comprises the steps: arranging and driving a flexible spoiler in a wind tunnel; the parameters of the spoiler are optimized with the wind resistance coefficient as the target at the multiple yaw angles; designing a piecewise linear rule controller based on an optimization result; pressure monitoring points are arranged on the two sides of a vehicle body, the regression relation between the pressure difference and the yaw angle is established, and the yaw angle is recognized in real time; developing a self-adaptive resistance reduction optimization program, driving the spoiler to be adjusted to the optimal form in real time according to the identified yaw angle, and verifying the resistance reduction effect of the spoiler; a mathematical method is used for calculating the curved surface shape of the spoiler, and reference is provided for automobile appearance design. Aerodynamic configuration self-adaptive adjustment of the vehicle under the crosswind working condition can be achieved, the wind resistance optimization capacity of the real vehicle in the running process is remarkably improved, and an effective experimental method and design basis are provided for low-wind-resistance development of the vehicle.

This application provides a control method for a stick-slip piezoelectric actuator throughout its entire lifecycle, comprising: obtaining a contact force reference value using the equation of the driving characteristic surface; acquiring contact force data from a database; calculating a contact force compensation value and converting it into a compensation voltage for the vertical piezoelectric stack; acquiring step displacement and actual contact force data; obtaining the total wear volume using the Archard adhesive wear model based on the step displacement and voltage data of the vertical piezoelectric stack; proportionally allocating the total wear volume to the slider and driving foot using a wear distribution method based on material hardness; storing the obtained slider wear data, driving foot wear data, and actual contact force data in a contact force database; and predicting contact force data for non-cyclic working ranges based on slider wear data and driving foot wear data within the cyclic working range, and storing this prediction in the database. This method can effectively improve the driving stability of the stick-slip piezoelectric actuator throughout its entire working stroke and lifecycle.

This application provides a multi-level pulse timing adaptive suppression method for agricultural machinery chassis domain controllers, comprising: acquiring the current heat integral count value and the measured temperature rise of the motor in the multi-level pulse timing; when a rheological unloading event is triggered and the measured temperature rise of the motor does not reach the rated temperature rise limit, identifying and deducting the erroneous accumulation part caused by the current rheological unloading event in the current heat integral count value to obtain a reset heat integral value; updating the state of the heat integral protection module by resetting the heat integral value, adjusting the motor drive control parameters, and determining the complete release condition of the next level drive pulse; transmitting the corresponding pulse control signal to the actuator of the agricultural machinery walking drive motor according to the complete release condition, and collecting the actual torque response data fed back by the motor actuator; judging whether the drive torque continuity is maintained based on the actual torque response data; if it is not maintained, returning to adjust the control parameters and release condition; if it is maintained, generating a qualified judgment result.

This utility model discloses a self-adjusting dual-wheel caster for AGVs, belonging to the field of AGV technology. It includes a mounting base with a bracket rotatably connected to its bottom. Casters are symmetrically arranged on both sides of the bracket. A movable groove is formed at the bottom of the bracket, housing an automatic adjustment mechanism for the tire tread to contact the ground. The two casters are respectively mounted on the left and right sides of the self-adjusting mechanism. An auxiliary adjustment mechanism for resetting the self-adjusting mechanism is provided above it. This utility model, through its movable groove and free adjustment mechanism, allows the casters to automatically adjust their angle according to load changes, ensuring the tire tread remains in effective contact with the ground, enhancing grip and driving stability. The auxiliary adjustment mechanism utilizes the elasticity of a spring to ensure the free adjustment mechanism quickly returns to its original position, compensating for the reset delay problem inherent in purely mechanical automatic adjustment. Combining manual intervention with automatic adjustment improves system reliability.

In order to achieve improvement in running stability and operability, improvement in freedom of design layout, ease of assembly and adjustment, and compliance with the riding feeling of the user with a simple configuration, on a running unit (140), a neutral restoration mechanism (160L, 160R) is provided which supports a pair of left and right wheels (155L, 155R) by upper and lower moving swing arms (151L, 151R) in a staggered linkage and has an extension member (165L, 165R) that extends and contracts in accordance with the swing of the swing arms (151L, 151R), the neutral restoration mechanism (160L, 160R) being configured so that the torque acting on the swing arms (151L, 151R) by the restoration force of the extension member (165L, 165R) is substantially constant and independent of the amount of swing of the swing arms (151L, 151R). The running vehicle is provided with the above-described running unit (140).

This invention discloses a power distribution control system and method for a four-wheel drive electric vehicle. The system includes a data acquisition unit, a power distribution algorithm module, and a power closed-loop control module. The data acquisition unit collects the input data required for vehicle power control, and its output is connected to the power distribution algorithm module. The power distribution algorithm module determines a power distribution scheme based on the input data and sends the scheme to the power closed-loop control module. The power closed-loop control module controls the actuators to complete power output and switching according to the power distribution scheme. This solution can dynamically adapt to changes in operating conditions, accurately identify driver intentions, and balance driving stability and energy efficiency.

This utility model provides an adjustable monotube shock absorber with nitrogen tank damping, comprising an aluminum oil reservoir. Dust cover assemblies and a cylinder base are respectively provided at the front and rear ends of the aluminum oil reservoir. A piston valve assembly and a piston rod are provided inside the aluminum oil reservoir. One end of the piston rod passes through the piston valve assembly and is fixedly connected to it by a nut; the other end passes through the dust cover assembly and extends out of the aluminum oil reservoir. The cylinder base is characterized by having an O-ring fitted on its outer side, and a high-pressure oil pipe provided on the side wall of the cylinder base. One end of the high-pressure oil pipe is connected to the cylinder base, and the other end is connected to a nitrogen tank assembly. The high-pressure oil pipe connects the nitrogen tank assembly and the aluminum oil reservoir. The adjustable assembly is used to adjust the damping value of the shock absorber oil flowing into the nitrogen tank assembly. By setting the adjustable assembly, the damping value of the shock absorber can be flexibly adjusted, improving the vehicle's driving stability and ride comfort under different road conditions.