5075 results about "Braking system" patented technology

The invention provides a dynamic fault-tolerant control method based on an expected function safety mechanism, and the method comprises the steps: 1, selecting the model of a sensor, and enabling the sensor to be distributed at the periphery of a vehicle body; 2, building a decision algorithm model, carrying out environment scene recognition, planning a driving path and speed according to data obtained by a sensing layer, evaluating safety risks of different decisions, and carrying out judgment and decision making on various conditions; 3, control interfaces of a vehicle power system, a steering system and a braking system are established, and the electronic control unit converts a decision control instruction output by the decision algorithm model into actual vehicle operation through the control interfaces; 4, performing an expected function safety mechanism, performing real-time monitoring on state parameters of the vehicle, and analyzing detection data through a fault detection algorithm; 5, implementing a fault tolerance strategy; and 6, continuously monitoring the actual driving state and the system response condition of the vehicle, and adjusting the fault tolerance strategy.

The invention relates to an electronic mechanical braking system control method based on contact point detection and mode management. Comprising the following steps: step 1, designing a clamping force basic control algorithm based on stiffness characteristics and feedforward compensation of Stribeck friction in combination with a proportional-integral-differential control theory; 2, designing a contact point detection algorithm based on position signal identification by analyzing the typical characteristics of the contact points, and identifying the inherent relation between the position stable points and the contact points through experimental calibration; and step 3, designing a mode management system including clearance elimination, clearance keeping and clamping force control, and performing mode switching and keeping by judging a brake signal. The overall function design of contact point detection, mode management and brake control of the electronic mechanical brake system is comprehensively achieved, the control precision and function stability of the system can be remarkably improved, and a set of complete solution is provided for design and development of the brake-by-wire system in the future.

The invention provides a surrounding type numerical control rotary table intelligent braking system based on AI predictive control, and belongs to the technical field of intelligent manufacturing and numerical control. The problems that an existing numerical control rotary table braking system is lagged in response, lacks intelligent prediction and self-adaptive capacity, and is insufficient in control precision and attenuated in long-term performance are solved. The surrounding type numerical control rotary table intelligent brake system based on AI predictive control comprises a state acquisition module, an AI predictive module, a pressure control module, a surrounding type brake execution structure and a feedback correction module, an AI predictive mechanism and a self-correction feedback loop are introduced, intelligence, self-adaption and high responsiveness of brake control are achieved, and the brake control precision is improved. The positioning precision, the braking stability and the overall energy efficiency level of the numerical control rotary table are improved, and the numerical control rotary table has the advantages that the response speed is remarkably increased, the positioning precision is high, the self-adaptive capacity is high, the braking process is stable and the intelligent degree is high.

The invention provides an elevator multi-caliper disc brake diagnosis method, system and device, a medium and a product, and relates to the field of fault diagnosis of elevator multi-caliper disc brakes. The diagnosis method comprises the following steps: acquiring a state transition matrix among preset states in a Markov jump system state transition model; first operation data of the multi-caliper disc brake are obtained and preprocessed; according to the preprocessed first operation data, a current braking system state estimation value and a corresponding operation data range are obtained; second operation data of the multi-caliper disc brake are collected in real time and preprocessed; and when the preprocessed second operation data exceed the operation data range, the fault type of the multi-caliper disc brake is determined according to the current braking system state estimation value, the Markov jump system state transition model and the state transition matrix. According to the invention, fault diagnosis of the multi-caliper disc brake of the elevator can be realized, and support is provided for daily overhaul and maintenance of an elevator brake system.

The invention relates to a brake system including at least one brake with an electric brake actuator, at least one electronic control unit for controlling the at least one electric brake, and two different power supply units connected to the at least one electronic control unit and configured for supplying energy to the at least one electric brake actuator. The at least one electronic control unit comprises a first brake actuation system for activating the electric brake actuator and a redundant brake actuation system for activating the electric brake actuator in case of a failure of the first brake actuation system. The invention also relates to a method for using the brake system.

The invention provides a regenerative braking-based dynamic energy distribution method for a new energy automobile, which belongs to the technical field of braking systems and comprises the following steps: step 1, determining the total braking force currently required by the automobile, and further determining the distribution proportion of mechanical braking and regenerative braking; 2, evaluating the current acceptable charging power of the battery and the feedback power range of the motor, and further determining limit data of regenerative braking energy distribution; 3, the optimal regenerative braking force and mechanical braking force distribution proportion under the current working condition is determined; 4, the optimal regenerative braking force distribution proportion is converted into a regenerative braking force instruction, then a motor is controlled to generate corresponding regenerative braking torque based on the regenerative braking force instruction, the vehicle is braked, and energy is recycled; and 5, the mechanical braking force distribution proportion is converted into a mechanical braking force instruction, and then a mechanical braking device is controlled to generate corresponding braking force based on the mechanical braking force instruction. And more accurate brake control and energy management are realized.

The invention discloses a light passenger car chassis steering stability self-adaptive control method, which comprises the following steps of: collecting multi-dimensional working condition parameters in real time, and covering 12 types of key parameters such as a steering wheel rotating angle and a wheel speed; after preprocessing and abnormity diagnosis, double models are adopted to estimate the dynamic state of the vehicle in parallel; dynamically setting a control target, and realizing personalized control in combination with driver style recognition; the control quantity is optimized through multi-mode strategy dynamic switching and steering and braking system cooperative control; and actuator dynamic compensation, scenarized self-learning and multi-stage fault handling mechanisms are introduced. According to the method, the complex working condition adaptability is improved, the response speed is controlled, the subsystem cooperation efficiency is improved, the system robustness and the long-term use performance are enhanced, and the driving safety of the light bus is effectively guaranteed.

The invention relates to a commercial vehicle integrated brake control and sensor system. The system comprises a multi-source sensor module used for acquiring sensor signals of operation of the commercial vehicle brake control system. The feature extraction module carries out filtering processing on sensor signals and extracts key feature parameters to construct a feature parameter matrix. In the braking decision execution module, a front and rear axle control unit calculates a front and rear axle braking force distribution coefficient based on the characteristic parameter matrix and generates an intelligent braking instruction; and the braking execution unit dynamically adjusts single-wheel braking force distribution according to the intelligent braking instruction to obtain braking execution parameters. And the evaluation optimization module judges the stability of the braking system according to the braking execution parameters and the operation real-time feedback data, and adjusts the braking force distribution parameters of each wheel to generate an optimized braking control strategy. By adopting the system, the multi-source data fusion precision, the dynamic adaptability of braking force distribution and the communication stability under complex working conditions in the braking process of the commercial vehicle can be improved, and the safety and reliability of the braking system are enhanced.

Systems and methods of operating a fracturing operation include a platform having an upper surface and a channel, wherein the platform is configured to receive a carrier mounted with a pumping unit; and a conduit configured to transfer fluid to or from a manifold system, the conduit having a first end configured to be connected to the pumping unit. The channel may be configured to receive the conduit when the carrier is at least partially received on the platform. A guide member may be configured to guide the conduit into the channel and include a rounded portion and an abutment surface, wherein the conduit is configured to extend at last partially around the rounded portion, and the carrier is configured to engage the abutment surface. The systems and methods may also include a controller configured to control a braking system of the carrier when the pumping unit is actuated.

Disclosed in the present application is a wheel anti-lock braking system applicable to hill braking. In the wheel anti-lock braking system, a wheel speed identification module is used for identifying a vehicle wheel speed signal and a wheel acceleration signal; a vehicle speed acquisition module is used for calculating a vehicle body speed signal; a driving intention identification module is used for obtaining a front and a rear axle enable flag bit; a state machine module is used for determining whether the working state of a low-speed hill anti-lock braking system is a standby state or a shutdown state, and starting a conventional anti-lock braking system when the working state of the low-speed hill anti-lock braking system is a shutdown state; the state machine module receives the front and rear axle enable flag bits, and transmits the front and rear axle enable flag bits to a control logic module when the working state of the low-speed hill anti-lock braking system is a standby state; and the control logic module is used for sending a low-speed hill anti-lock braking system control command when wheels show a tendency to lock up. The present application realizes anti-lock braking control over wheels at low speeds, especially during hill braking, which cannot be achieved by conventional wheel anti-lock braking systems.

An electromechanical brake system (10) includes a first energy supply apparatus (20) and a second energy supply apparatus (21), a first system control device (30) and a second system control device (31), a plurality of electromechanical brake actuator devices (41), and a first plurality and a second plurality of electronic brake control systems (40a, 40b). Each of the electronic brake control systems is set up to control one of the electromechanical brake actuator devices. The first energy supply apparatus is connected to the first system control device and to each of the first electronic brake control systems, and the second energy supply apparatus is connected to the second system control device and to each of the second electronic brake control systems. A further control device (32, 47) may be connected to at least one of the first electronic brake control systems or one of the second electronic brake control systems.

A method for automated guidance of a vehicle along a specified setpoint trajectory at an actual speed, wherein the setpoint trajectory includes geometric trajectory variables, the method including ascertaining an actual deviation of the vehicle from the setpoint trajectory and outputting the ascertained actual deviation and generating manipulated variables such that the vehicle, in the case of automated control of a drive system and / or a braking system and / or a steering system of the vehicle, moves closer to the setpoint trajectory. The method also includes ascertaining whether an undesirable driving state is present when the vehicle moves closer to the setpoint trajectory, wherein the undesirable driving state is ascertained from the specified setpoint trajectory based on the geometric trajectory variable, and, if the presence of the undesirable driving state is identified, automatically controlling the vehicle based on generated stability variables and / or adapting the setpoint trajectory.

The invention relates to the technical field of aircraft brake, in particular to an aircraft brake servo valve performance monitoring and health management method, which comprises the following steps of: acquiring a servo valve theoretical output current and a servo valve recovery current; according to the theoretical output current of each channel of the servo valve and the recovery current of the servo valve, whether brake current output loops of the two channels are abnormal or not is judged; when one channel of brake current output loop is abnormal, whether the other channel of brake current output loop is abnormal or not is judged according to the actual brake pressure and the theoretical pressure; and when the brake pressure output loop of the other channel is normal, brake control is carried out on the servo valve through the channel. By monitoring the performance of the servo valve in real time, it is guaranteed that dynamic switching can be achieved when the performance of the servo valve drifts in the airplane braking process, the influence of the performance drifting of the servo valve on the airplane braking effect is avoided, and the safety of a braking system is improved.

A stable walking apparatus can be used to allow the elderly, disabled, injured, or infirmed to move for day-to-day activities and exercise. The apparatus supports the individual at an upper body portion, such as under the arms of the user. This allows use of the arms and legs of the individual, such as better balance and move with the device, while also controlling aspects of the device. The support is height adjustable, and also includes a braking system to both slow down and stop the user-apparatus. The braking system can be used with limited extremity functionality for greater use of the apparatus by a wide range of individuals. Swiveling wheels provide for additional functionality to use the device for more purposes and in increased locations.

The invention relates to a self-adaptive control method for a rain and snow mode of rail transit, electronic equipment and a medium, and the method comprises the steps: comprehensively studying and judging a rain condition based on multi-sensor data and numerical weather forecast data, and calculating a weather grade in the rain and snow mode, the multi-sensor data including video detection data, laser radar data and rainfall data; whether a rain and snow mode is set or not is judged according to the weather level, if yes, the current track slip degree is evaluated according to the multi-sensor data, and the GEBR value is adaptively updated based on the slip degree; the CC calculates the running safety braking envelope of the train by using the updated GEBR value, and feeds back a slip detection result and a dynamic parameter adjustment result in real time; and the ATS dynamically adjusts the operation plan of the train according to the slip detection result reported by the CC, and optimizes the operation scheduling of the whole train. Compared with the prior art, the method has the advantages that self-adaptive management of the rain and snow mode is achieved based on the dynamically-adjusted GEBR, and the running safety and reliability of the train in the rain and snow weather are effectively improved.

The invention discloses a full-link redundancy EMB control system and method without a main controller, and belongs to the field of braking systems, the full-link redundancy EMB control system comprises a front axle control module, a rear axle control module and four EMB actuators, the front axle control module comprises a first control module and a second control module, and the rear axle control module comprises a third control module and a fourth control module; the four EMB actuators are respectively mounted on four wheels of a vehicle, and the first control module, the second control module, the third control module and the fourth control module are respectively connected with the four EMB actuators; the front axle control module and the rear axle control module are both connected with the whole vehicle CAN of the vehicle, the front axle control module and the rear axle control module are connected through the internal CAN, and therefore the redundant design of vehicle braking can be achieved, and the reliability of vehicle braking is improved.

The invention provides an electronic mechanical braking system, a vehicle controller and an electric vehicle, and relates to the technical field of electric vehicles. The electronic mechanical braking system comprises a central controller and four wheel end braking devices, and the central controller is used for controlling the four wheel end braking devices to output clamping force to four wheels of the electric vehicle. Wherein the central controller is in communication with the whole vehicle CAN through two public CAN buses and is in communication with each of the four wheel end braking devices through two private CAN buses. In this way, redundant backup of the communication link is achieved, and the communication reliability of the electronic mechanical braking system is improved.

The invention relates to the technical field of rail transit automatic driving, and particularly discloses a rail transit train automatic driving control method, which is characterized in that a vehicle-mounted control center cooperates with a signal system, a traction unit and a braking system, and centimeter-level real-time positioning is realized by adopting extended Kalman filtering and fusing satellite positioning, an odometer and trackside beacon data; the parking precision of the platform is controlled based on a graded braking strategy (coasting-common-precise braking) and pulse type terminal point fine adjustment; the method dynamically adapts to line condition changes in combination with feedforward-feedback composite speed control, and establishes a multi-level safety monitoring network (obstacle detection / overspeed protection / vehicle door linkage) to realize full-process closed-loop control, and finally, high-precision, high-safety and high-coordination operation under unmanned driving is achieved.

The application discloses an intelligent electric chassis configuration and a fault-tolerant control method of the intelligent electric chassis, and relates to the technical field of electric chassis. The chassis configuration comprises a front axle centralized motor drive assembly, a rear axle distributed motor drive assembly, a front axle electronic hydraulic brake system, a rear axle electronic mechanical brake system and a chassis domain controller. The front axle centralized motor drive assembly comprises a centralized drive motor, a front wheel speed reducer and a drive half shaft which are sequentially connected. The rear axle distributed motor drive assembly comprises a left rear wheel end drive motor and a left rear wheel speed reducer which are sequentially connected, and a right rear wheel end drive motor and a right rear wheel speed reducer which are sequentially connected. The front axle electronic hydraulic brake system comprises a first main brake unit and a redundant brake unit. The rear axle electronic mechanical brake system comprises a second main brake unit. The chassis domain controller is used for controlling the centralized drive motor, the left and right rear wheel end drive motors, the first main brake unit, the redundant brake unit, the second main brake unit, a front axle steer-by-wire system, an intelligent suspension system and an intelligent tire. The application can improve the chassis safety and fault-tolerant capability to support high-level automatic driving functions.

The embodiment of the invention provides a vehicle low-temperature heat management control method and device, a vehicle and a storage medium. The method comprises the following steps that the temperature of the environment where the vehicle is located, the module temperature of a power battery and the maximum allowable charging power are obtained; based on the environment temperature, the module temperature and the maximum allowable charging power, the vehicle is controlled to enter a low-temperature heat management working condition, and the braking energy recovery torque of the vehicle is determined according to the motor rotating speed and the maximum allowable charging power; based on the braking energy recovery torque and the motor rotating speed, the driving motor is controlled to execute the braking energy recovery action, meanwhile, the working efficiency of the driving motor is adjusted to generate heat, and the cooling system heats the power battery through the heat. On the premise that the safety of the battery is guaranteed, optimization of braking torque limitation is achieved, and the problems that in the related technology, due to the fact that the motor braking torque in the low-temperature environment is strictly limited and excessively depends on a mechanical braking system, the energy utilization efficiency of the whole vehicle is reduced, and abrasion of the braking system is aggravated are solved.

The present invention relates to a CAN bus anomaly detection method and system based on a dual attention mechanism, comprising the following steps: S1, collecting on-board data from an OBD interface of a vehicle in real time, wherein the collected on-board data comprises operation parameters of an engine, a vehicle speed, the state of a braking system, and the readings of other important sensors; and S2, performing inference analysis on the on-board data at a vehicle end by using an anomaly detection model, calculating a threshold by means of normal operation data so as to identify a potential anomaly or attack mode, once an anomaly is detected, immediately generating identification information, giving a direct alarm to a driver, and slicing, encrypting and storing abnormal data. The present invention relates to the technical field of CAN bus anomaly detection. In the present invention, an anomaly is detected by using the strong relevance of normal data characterization under different perspectives and the difference between the normal data characterization and abnormal data characterization, and by means of the characterization learning of a large amount of normal data, the objective of anomaly detection is achieved, the dependence on abnormal data is reduced, and the accuracy of CAN bus anomaly detection is improved.

Trolley systems and associated rails and tracks may include trolleys having an integrated brake system that can be adapted to slow or stop the trolley based on various control inputs (internal or external). The track system may be formed from either or both of a series of tensioned cables or tracks that are interconnected with transition system and the trolleys, able to transition between track systems. The track system may be fitted with additional braking elements to govern motion of the trolley along a track system. Additionally, the track may be fitted with other elements that provide an external input into the trolley to modify the braking operation of the trolley.

The invention discloses a constructional engineering supervision intelligent safety early warning system for a high-risk working plane, and relates to the field of constructional engineering supervision, and the system comprises an acquisition module which is used for collecting the wind speed, humidity, visibility and static obstacle space coordinates of the periphery of the high-risk working plane of a tower crane in real time, and generating environment perception original data; the first monitoring module is used for collecting tower crane body structure stress, a cargo boom rotation angle, a hoisting mechanism load and a brake system working condition parameter of a tower crane and generating tower crane body operation state data. According to the system, surrounding environment parameters, equipment operation states and personnel dynamic states can be obtained in real time, risk grades and types are accurately judged, multi-form early warning is pushed in time, tower crane operation is regulated and controlled in a linkage mode, personnel casualties and equipment damage risks are effectively reduced, construction engineering supervision safety and efficiency are improved, and safety and reliability are improved. And safety accidents caused by untimely risk disposal or misoperation are avoided.

The utility model relates to the field of hydraulic braking, and discloses a parking braking system and agricultural machinery, the parking braking system comprises a parking brake, a first reversing valve, a second reversing valve and an energy accumulator, a working oil port of the first reversing valve is connected with a rod cavity of a brake cylinder of the parking brake, an oil inlet of the first reversing valve is connected with an oil inlet path, and an oil outlet of the second reversing valve is connected with an oil outlet path; an oil return port of the first reversing valve is connected with an oil return path, in a power-off state, a working oil port of the first reversing valve is communicated with the oil return port, an oil outlet of the second reversing valve is connected with the oil return path, in the power-off state, an oil inlet of the second reversing valve is communicated with the oil outlet, and the energy accumulator is connected with the oil inlet of the second reversing valve. According to the parking braking system, the situation that tires are locked when the agricultural machine loses power accidentally in the running process can be avoided, and meanwhile the agricultural machine can be slowly and stably decelerated till the agricultural machine is stopped and parked.

The invention discloses a vehicle braking method, device and equipment and a storage medium, and belongs to the field of vehicle engineering. The method comprises the steps that first braking operation is received, and the first braking operation is used for controlling a hydraulic braking system to conduct hydraulic braking; according to the state of at least one component in the hydraulic braking system, the working state of the hydraulic braking system is determined; and according to the working state of the hydraulic braking system and the running state of the vehicle, an EPB is controlled to conduct linear braking. The method can ensure the driving safety.

The invention discloses a brake system slip rate control performance calculation method and device and a medium. Belongs to the technical field of vehicles. The method comprises the following steps: determining a road condition type in a real vehicle test; determining a target slip rate according to the road condition type; the average slip rate of the four wheels is calculated according to a preset time interval, and an average slip rate array is obtained; and calculating a performance score of the braking system according to the average slip rate array and the target slip rate. Manual intervention is not needed in the whole process from data analysis to score output, and the calibration efficiency is improved. And meanwhile, the target slip rate is dynamically corrected in combination with road adhesion conditions, so that the evaluation result better fits the actual working condition. When the performance score is calculated, multi-dimensional difference values such as an average value, an extreme value, a median value and the like are used, and the control stability and precision are comprehensively reflected.

The invention relates to an automatic emergency braking threshold value adjusting method and system based on in-cabin multi-mode information, and relates to the technical field of auxiliary driving, the method comprises the steps that visual information and audio information of a driver and at least one passenger in a cabin are obtained, the visual information comprises facial expressions and head postures, and the audio information comprises audio information of the driver and the at least one passenger; the audio information comprises voice features and non-voice sounds; respectively calculating a driver state coefficient and a passenger state coefficient based on the visual information and the audio information; fusing the driver state coefficient and the passenger state coefficient to obtain an in-cabin safety situation coefficient; and according to the in-cabin safety situation coefficient, a triggering threshold value of the automatic emergency braking system is adjusted in a self-adaptive mode. According to the method, multi-modal information such as vision and audio in the cabin is fused, and state analysis of all passengers is combined, so that intelligent self-adaptive adjustment of the AEB braking threshold value can be realized, and the sensing accuracy and decision reliability of an emergency braking system in a complex scene are improved.

The invention relates to a vehicle active safety control method and system, a storage medium and a vehicle, and belongs to the field of intelligent driving control. The vehicle active safety control method comprises the steps that driving state information is obtained in real time; calculating a longitudinal risk avoidance determination threshold based on the driving state information, and setting a first trigger condition based on the longitudinal risk avoidance determination threshold; if the longitudinal distance between the vehicle and the target vehicle meets the first triggering condition, an automatic emergency braking system is activated, and a first deceleration used for controlling longitudinal braking of the vehicle is generated; after the automatic emergency braking system is activated, a transverse risk avoiding judgment threshold value is calculated on the basis of the driving state information updated in real time, and a second triggering condition is set on the basis of the transverse risk avoiding judgment threshold value; if the longitudinal distance between the vehicle and the target vehicle meets a second triggering condition, an automatic emergency steering system is activated, and a second control instruction is generated; wherein the second control instruction is used for controlling the automatic emergency steering system to execute the cooperative steering angle and controlling the automatic emergency braking system to execute third deceleration cooperating with the cooperative steering angle.

The invention discloses a brake pedal verification method, device and equipment based on a two-way pedal and a storage medium, relates to the technical field of vehicle brake control, and discloses the brake pedal verification method based on the two-way pedal. Comprising the steps that a brake lamp switch signal, an allowable deviation threshold value and a first sensor signal and a second sensor signal of a two-way pedal position sensor are obtained; performing processing according to the first sensor signal and the second sensor signal to obtain a target deviation value, and performing consistency analysis according to the target deviation value and the allowable deviation threshold to obtain a consistency analysis result; performing fault tracing on the consistency analysis result according to the brake lamp switch signal to obtain a fault positioning result; and fault isolation is carried out based on the fault positioning result, so that brake pedal verification based on the two-way pedal is completed. The technical effect of guaranteeing the signal reliability of the two-way pedal position sensor and the function continuity of the braking system is achieved.

The application provides a normally open large-flow switching electromagnetic valve and a hydraulic control unit of an automobile brake system. The electromagnetic valve comprises an electromagnetic coil, a valve shell, a moving iron, a valve core, a small-flow valve seat and a large-flow valve seat. An accommodating space is formed in the valve shell. The valve core, the small-flow valve seat and the large-flow valve seat are sequentially arranged in the accommodating space from top to bottom. The valve core is connected with the moving iron, and the electromagnetic coil is arranged around the moving iron and the valve shell. A first elastic member is arranged between the valve core and the small-flow valve seat. The small-flow valve seat and the large-flow valve seat are connected through a second elastic member. When the electromagnetic coil is powered off, the valve core opens a small-flow port, and the small-flow valve seat opens a large-flow port, so that the electromagnetic valve is opened with large flow. When the electromagnetic coil is powered on, the valve core closes the small-flow port, and the small-flow valve seat closes the large-flow port, so that the electromagnetic valve is closed. The application can satisfy the normally open and large-flow capacity of the electromagnetic valve, so as to realize rapid pressure regulation.