154 results about "Dynamic braking" patented technology

Disclosed is a corner module apparatus for a vehicle. The corner module includes a driving unit that provides drive power to a wheel of the vehicle, a braking unit that interferes with rotation of the wheel to generate braking power, and a suspension unit connected to the driving unit. The suspension unit absorbs shock transferred from a road surface. The corner module also includes a steering unit connected to the suspension unit and rotated about a steering axis inclined with respect to the wheel. The steering unit adjusts a steering angle of the wheel.

The invention belongs to the field of intelligent vehicle-mounted technology, and particularly relates to a multifunctional vehicle-mounted sensing detection system based on multi-source information fusion, which comprises multi-source information acquisition, high-precision space-time synchronization and heterogeneous data preprocessing. A heterogeneous sensing system with feature level deep fusion, vehicle state dynamic performance evaluation and adaptive decision and risk evaluation capabilities is constructed, and a driving decision is dynamically adjusted through fusion perception and vehicle performance. The vehicle state and dynamic performance evaluation module is constructed by deeply integrating vehicle internal state data acquired by a vehicle-mounted diagnosis system into a perception fusion and decision planning process, and the core contradiction of disjunction of a perception result and a vehicle dynamic performance strategy is effectively solved. The system can evaluate key performance parameters such as power, braking, steering and the like of the vehicle and potential faults of the key performance parameters in real time, and the driving strategy and the safety margin are dynamically adjusted in the self-adaptive decision and risk evaluation module according to the actual physical limitation of the vehicle.

A locomotive comprises a DC power bus, traction motors, batteries, and a charging source, but has no prime mover engine. Each traction motor includes armature and field windings connected in parallel across the DC power bus. The batteries provide power to the DC power bus when in a motoring mode, and receive power from the DC power bus when in a charging mode and a dynamic braking mode. The charging source is connected across the DC power bus to provide charging power to the batteries when in the charging mode. The traction motors also provide charging power to the batteries when in the dynamic braking mode. The power from the charging source is less than the power that would be provided by a prime mover engine. The charging source provides no power to the traction motors when in the charging mode.

The invention discloses a high-temperature protection control method of a vehicle braking system and a vehicle, belongs to the technical field of vehicle control, and aims to solve the problems that an existing vehicle braking system lacks high-temperature trend prediction capacity and a dynamic braking force adjusting mechanism, heat accumulation is prone to occurring under the high-load working condition, braking performance declines, and the service life is poor. And therefore, the technical problem of insufficient braking stability and safety is solved. The method comprises the following steps: constructing a generative diffusion model; constructing a temperature control trend prediction model; training the temperature control trend prediction model through the high-temperature time sequence and the braking heat data sample set; constructing a multi-target reinforcement learning strategy model; performing multi-model fusion processing on the generative diffusion model, the temperature control trend prediction model and the multi-target reinforcement learning strategy model to obtain a high-temperature protection control system; and inputting the real-time braking heat data of the target vehicle into a high-temperature protection control system to obtain a corresponding control action vector so as to carry out high-temperature protection control on a vehicle braking system.

The invention discloses a mixing station scene loader real-time safety monitoring method and system based on a sensor. The method comprises the following steps: completing construction of an environment and equipment state sensing network; a computing platform and a delay communication module are deployed at the edge end, and graded braking is achieved in combination with a lightweight deep neural network and a dynamic braking strategy; the cloud end depends on distributed computing resources, constructs a space-time correlation model through a graph convolutional network, and realizes multi-target task scheduling optimization in combination with an adaptive weight strategy; in the path planning link, parameters including poses, material states and conflict risks are fused through a reinforcement learning framework, and an optimal path is generated through environment modeling, conflict evaluation and trajectory smoothing; the feedforward neural network predicts the collision risk in real time, and a'prediction-decision-execution 'closed loop is formed in combination with a hierarchical response mechanism; and establishing a multi-level early warning trigger mechanism. Therefore, the safety monitoring has real-time performance and also has the global risk insight ability.

A variable-frequency drive includes a rectifier, a filter, an inverter, a capacitor bank, and control circuitry. The rectifier converts AC power from a power source to DC power on a DC bus for filtering by the filter. The inverter converts the DC power to three-phase AC power for output to the electric motor. The capacitor bank has one or more capacitors connected to the DC bus. The capacitor bank can store regenerative power on the DC bus from the inverter and can supply the stored DC power to the DC bus for conversion to the three-phase AC power to drive the electric motor. The control circuitry pre-charges the capacitor bank from the AC power of the power source. The control circuitry monitors one or more parameters of the variable-frequency drive and detects one or more fault conditions associated with the one or more monitored parameters.

The invention discloses an electric drive assembly and engineering machinery. The electric drive assembly comprises a drive motor assembly and a final transmission assembly. The parking brake is arranged at the first end of a rotating shaft of the driving motor, and the driving motor can achieve dynamic braking during driving. The final transmission assembly comprises a first-stage planet row, a second-stage planet row, a third-stage planet row and a service brake. The second end of a rotating shaft of the driving motor is in transmission connection with a first-stage sun gear of a first-stage planet row and then sequentially drives a second-stage planet row and a third-stage planet row, power is output by a third-stage planet carrier of the third-stage planet row, the third-stage planet carrier is connected with a chain wheel, and the chain wheel is connected with a hub body; a service brake is arranged on the hub body and is used for generating or releasing service braking on the hub body; the service brake is externally connected with a cooling circulation oil way, a friction plate is forcibly cooled, and safety and reliability are improved. The caliper disc type parking brake is placed outside the driving motor, the braking torque is amplified through the three-level large reduction ratio, and the requirement for the braking torque of the caliper disc type parking brake is lowered.

A locomotive comprises a DC power bus, traction motors, batteries, and a charging source, but has no prime mover engine. Each traction motor includes armature and field windings connected in parallel across the DC power bus. The batteries provide power to the DC power bus when in a motoring mode, and receive power from the DC power bus when in a charging mode and a dynamic braking mode. The charging source is connected across the DC power bus to provide charging power to the batteries when in the charging mode. The traction motors also provide charging power to the batteries when in the dynamic braking mode. The power from the charging source is less than the power that would be provided by a prime mover engine. The charging source provides no power to the traction motors when in the charging mode.

The present invention discloses a vehicle braking control method and system under long downhill conditions. The method includes the following steps: obtaining the vehicle's slope driving condition and the vehicle's braking energy recovery attribute; when the vehicle does not have the braking energy recovery function or the vehicle has the braking energy recovery function but is in the energy recovery exit state, obtaining the vehicle's operating condition; when the vehicle's required deceleration is less than the preset deceleration and the temperature rise of the rear brake disc is less than the first preset temperature rise, controlling to cut off the hydraulic input of the front and rear wheels and enter the dynamic braking mode that preferentially brakes the rear wheels; obtaining the condition that satisfies the dynamic braking mode exit condition; when the dynamic braking mode exit condition is satisfied, controlling to exit the dynamic braking mode and enter the hydraulic braking mode of simultaneous braking of the front and rear wheels. The vehicle braking control method under long downhill conditions provided by this application effectively solves the problem that the temperature rise of the front brake disc is too fast relative to the rear brake disc, and avoids the excessive temperature rise of the front brake disc from affecting the braking effect.

The invention discloses an intelligent vehicle emergency obstacle avoidance braking control method and system, and relates to the technical field of automatic driving, and the method comprises the steps: obtaining historical vehicle driving data and historical vehicle user monitoring data, constructing a driving behavior analysis model, and evaluating the vehicle driving user reaction capability under collision early warning; obtaining a plurality of historical emergency obstacle avoidance brake control triggering scene big data and the collision early warning response capability of a vehicle driving user, constructing a personalized dynamic brake redundant space evaluation model, and generating a collision early warning response personalized redundant space of the vehicle driving user; real-time vehicle surrounding environment data are obtained, collision early warning response personalized redundant space of a vehicle driving user is used as a radius, a vehicle road environment collaborative risk field function is established, a vehicle traveling dynamic risk field is output, a vehicle emergency obstacle avoidance brake control mechanism is established, and a decision of a dynamic virtual hoist rope is generated. The method has the beneficial effects that the strong robustness for dealing with uncertainty is considered, and the risk avoiding success rate is remarkably improved.

The invention relates to a method for active dynamic braking of an elevator system (100). The method includes detecting (310) a dynamic braking condition, acquiring (320) speed data representative of a speed of the elevator car (102), and activating (340) an active dynamic braking operation for dynamically braking movement of the elevator car if the acquired speed data indicates (330) that the speed of the elevator car reaches a predetermined monitored speed level. The active dynamic braking operation includes operating a motor inverter of an elevator drive unit of an elevator system by switching a high-voltage side switch and a low-voltage side switch of the motor inverter in a controlled manner such that a rotating field is generated in a stator winding of a traction motor, therefore, the rotation of the traction motor is dynamically braked, and the movement of the elevator car is braked. The invention also relates to an elevator drive unit, an elevator system, a computer program and a computer readable storage medium.

The invention discloses a braking energy recovery self-adaptive control system based on a multi-agent cooperative game. The braking energy recovery self-adaptive control system comprises a human-vehicle-road comprehensive information acquisition module, a braking mode judgment module, a target braking force calculation module and a braking mode smooth transition module. The human-vehicle-road comprehensive information acquisition module acquires driver information, vehicle information and road environment information in real time; the braking mode judgment module calculates a braking energy recovery tendency characterization coefficient and compares the braking energy recovery tendency characterization coefficient with a threshold value, and whether a braking energy recovery mode is started or not is judged in a self-adaptive mode; the target braking force calculation module divides the braking system into a plurality of independent intelligent agents according to axles, and the motor braking force and the friction braking force of all the intelligent agents are distributed in a collaborative optimization mode through a multi-agent cooperative game algorithm; the braking mode smooth transition module adopts a smooth transition function to dynamically adjust the proportion of the motor braking force to the friction braking force, and smooth transition between the two braking force sources is achieved.

The utility model provides a frequency converter system and a dynamic braking module. The frequency converter system comprises a frequency converter, a motor and an energy consumption braking module. The motor is connected to the output end of the frequency converter. The energy consumption braking module is connected between the output end of the frequency converter and the motor. The energy consumption braking module comprises a braking resistor and a braking switch connected with the braking resistor in parallel, and the braking switch can be switched on or switched off to stop or start energy consumption braking of the braking resistor. According to the frequency converter system, a hardware structure in the frequency converter does not need to be changed, the frequency converter without the energy consumption braking function can have the energy consumption braking function by externally connecting the energy consumption braking module, in other words, the rapid shutdown and rapid speed reduction capacity is achieved, the universality is high, the effect is good, implementation is convenient, manpower, time and hardware cost can be saved, and the practicability is high. The motor is not damaged, and the safety and high reliability of a frequency converter system can be guaranteed.

The invention provides a dynamic braking element arrangement and control device for preventing a cruise vehicle from rolling, and relates to the technical field of vehicle braking control systems. The problems that in the prior art, when the complex overturning risk of a high-gravity-center vehicle is dealt with, risk sources cannot be distinguished, and control strategy switching is rigid are comprehensively solved. According to the method, the identification precision and response speed of the control system to overturning risks of different sources are improved, and the smoothness and precision of the control process are improved on the premise of ensuring the limit safety, so that the overall robustness and adaptability of the system in a complex and dynamic change scene are enhanced.

The invention discloses a control method for stable operation of a heavy-load combined train. The method is applied to the heavy-load combined train formed by connecting at least two traction locomotives and at least one dragged vehicle in series, and comprises the following steps: when the ramp type of the heavy-load combined train running on the current line is a preset type, before or simultaneously adjusting the working state of an air braking device to be a relieving state, adjusting the working state of the air braking device to be the relieving state; controlling the power braking device of the master control locomotive to increase the power braking force, and increasing the power braking force by the power braking device of the slave control locomotive; when the working state is adjusted to be a relieving state, the initial relieving moment is determined, when the accumulative relieving duration reaches the preset first duration, the power braking force of the power braking device of the master control locomotive is adjusted and reduced, and the power braking force of the power braking device of the slave control locomotive is adjusted and reduced; changes of hook pulling force and hook pressing force of the middle slave control locomotive are reduced, the longitudinal force of the train is controlled within an evaluation index range, and the running safety and stability of the train are improved.

The invention discloses a rail transit train longitudinal dynamic modeling traction and dynamic braking force calculation method, which comprises the following steps of: 1, acquiring the acceleration of a train, and calculating the sum of external forces borne by the train; 2, calculating the running resistance borne by the train; 3, air braking force borne by the train is calculated; 4, calculating the total traction force and the dynamic braking force of the train; and 5, distributing the total traction force and the dynamic braking force of the train to a specific vehicle. The method has the advantages that the method does not depend on acquisition of a locomotive performance curve any more, complexity and difficulty of locomotive control characteristic modeling in an existing method are simplified, accurate calculation and distribution of train traction and dynamic braking force can be achieved, and construction of a rail transit train longitudinal dynamic model is effectively supported.

The invention relates to a method for detecting a leak in a power brake system (10) of a motor veihcle. In order to generate a brake pressure (pB), the power brake system (10) comprises a power brake cylinder (66) with a brake piston (74). The method comprises the step of continuously determining (A) a volume-pressure value (p(V)) on the basis of a measured brake pressure (pB) and a brake fluid volume (VFZ) which is displaced from the power brake cylinder (66), during a braking operation (Br). In the event that the volume-pressure value (p(V)) exceeds a specified volume-pressure limit value (pG(V)), the following steps are carried out: summing (B) a tolerated and time- and pressure-dependent brake fluid loss (VB) from the start of the braking operation (Br) until a first refilling process (N1) of the power brake cylinder (66) and before at least one further refilling process (Nn); determining (C) a brake fluid volume (ΔVN) received during each refilling process (N1, Nn); reducing (D) the brake fluid loss (VB) by the brake fluid volume (ΔVN) received during the refilling process (N1, Nn); and determining (E) an error if the brake fluid loss (VB) calculated in this way lies below a volume limit value (VG) before a refilling process (N1, Nn).

A method for controlling a hydraulic volume in a system including a power brake hydraulically connected to a driving dynamics control. The method includes generating a control signal using the driving dynamics control and providing a control signal for the power brake, for providing hydraulic volumes for the driving dynamics control. The method further includes performing a control of the driving dynamics, returning the hydraulic volume from the driving dynamics control, after the control of the driving dynamics has ended, to a reservoir via previously opened circuit isolating valves, via which the driving dynamics control is connectable to the reservoir. The method also includes closing the circuit isolating valves and controlling the brake pressure in the driving dynamics control using a power piston arranged in a power cylinder, in the event that an active braking maneuver is initiated before or while returning the hydraulic volume.

The invention aims to provide a V2V-based AEB control device and method, and the device comprises a V2V-based AEB control device which comprises a V2V data communication module, a real-time data collection module, a data analysis module, a dynamic braking module, and a voice prompt module. The V2V data communication module is used for carrying out information intercommunication with nearby vehicles and transmitting the information to the data analysis module in real time; the real-time data acquisition module is used for acquiring the speed of the vehicle, the distance between the vehicle and the influence factor and the road condition image, and transmitting to the data analysis module in real time; the data analysis module is used for analyzing the currently acquired image and the vehicle sharing information and outputting a decision strategy to the dynamic braking module; and the dynamic braking module is used for controlling a vehicle braking system to reduce the current vehicle speed to a passing speed suitable for passing through the influence factors according to the received decision strategy, and reminding a driver by voice. According to the invention, road and environment influence factors in the vehicle driving environment can be detected and evaluated in real time, and dynamic control of the vehicle is realized through intelligent decision.

The embodiment of the invention provides a vehicle braking control method and device, electronic equipment and a storage medium. In response to a dynamic braking condition, the wheel deceleration, the wheel deceleration threshold value and the target braking parameter of a vehicle in the braking process are obtained; the target braking parameters comprise the target slip rate, the target wheel deceleration and the target braking time; determining a high attachment side of the vehicle according to the wheel deceleration and the wheel deceleration threshold; the high attachment side corresponds to parking force; acquiring an initial braking parameter corresponding to the high attachment side; the initial braking parameters comprise the initial slip rate and the initial braking time; and according to the wheel deceleration, the initial braking parameter and the target braking parameter, the parking force corresponding to the high attachment side is controlled. According to the embodiment of the invention, by identifying the road surface where the vehicle is located, the high attachment side of the vehicle can be rapidly and accurately identified, the parking force of the high attachment side is independently controlled based on multiple parameters such as the wheel deceleration, the slip rate and the braking time, and the stability and efficiency of vehicle braking are improved.

A dynamic braking system for an electrified vehicle having a high voltage (HV) battery system and an electric propulsion system includes a regenerative braking system configured to recharge the HV battery system, a vehicle controller configured to monitor and control the regenerative braking system to selectively perform a regenerative braking operation, and a vehicle brake actuator configured to selectively actuate one or more vehicle friction brakes. A brake controller is in signal communication with the vehicle brake actuator and configured for signal communication with a trailer brake actuator to selectively actuate trailer friction brakes. The brake controller is programmed to receive a driver braking request, receive a signal indicating a regenerative braking capacity of the electric propulsion system, and based on the driver braking request and the regenerative braking capacity, automatically adjust a trailer brake gain to (i) maximize energy recovery via regenerative braking and (ii) reduce brake wear.

The invention relates to a method for dynamically braking the rear wheels of a vehicle equipped with an electric parking brake by implementing an RWU braking mode which is ensured by controlling the parking brake according to the following rules and at the same time measuring the slip (13) of the wheels:-gradually clamping the brake if the slip (13) is less than a predetermined first threshold (3),-gradually clamping the brake if the slip (13) is less than the predetermined first threshold (3), and-gradually clamping the brake if the slip (13) is less than the predetermined first threshold (3). Until the sliding rate (13) is greater than the first threshold value (3); -if the slip (13) is greater than a predetermined second threshold value (4), which is greater than the first threshold value (3), gradually releasing the brake until the slip (13) is less than the second threshold value (4); -maintaining the clamping at the current level if the slip (13) is greater than the first threshold (3) and less than the second threshold (4). The method is characterized in that, during each dynamic braking request, at least the following three steps are carried out:-a test: a test clamping is carried out according to a predetermined test clamping force level, then waiting for an observation time, followed by a measurement of the slip (13); selecting: selecting an intermittent braking mode if the measured slip (13) is greater than a predetermined trigger value (14); otherwise, an RWU braking mode is selected; and braking: driving the parking brake in the mode selected in the selection step.

Systems and methods for controlling battery electric locomotives are disclosed. The method for controlling battery electric locomotives includes receiving, via one or more processors, a first set of data associated with the battery electric locomotives of a consist in a train, wherein the first set of data includes battery system data. The method includes processing, via one or more processors, the first set of data to determine the operating conditions of the battery electric locomotives. The method includes causing, via one or more processors, an update to the in-memory representation of the battery electric locomotives in a database to set the battery electric locomotives to a run-state mode or a dynamic braking mode. The method includes generating, via one or more processors, one or more commands for operating the battery electric locomotives of the train based on the updated in-memory representation.

The invention discloses a brake box, a motion control system, a mechanical arm and semiconductor equipment, relates to the field of industrial control, is used for realizing dynamic braking, and provides the brake box aiming at the problem that a motion track cannot be ensured to be not deviated during dynamic braking at present. The bleeder circuit in the brake box is connected with three phases of the motor, so that electric energy generated by power generation of the motor can be consumed, and the brake requirement is met. In addition, in the brake box, whether each phase in the three phases of the motor can consume electric energy through the bleeder circuit or not is controlled through the first switch. Furthermore, the current of each phase is detected through a current detection circuit, and the current of each phase of the motor is controlled to be close to a corresponding target current value, thereby ensuring that the motion track of the load driven by the motor does not deviate from the original track. Moreover, the brake box is independent of the motor driver, so that even if the motor driver breaks down, the brake control of the brake box on the motor is not influenced.

The invention relates to a method for active dynamic braking of an elevator system. The method comprising: detecting a dynamic braking situation, obtaining speed data representing a speed of an elevator car, and activating an active dynamic braking operation for dynamically braking the movement of the elevator car, if the obtained speed data indicates that the speed of the elevator car reaches a predetermined monitoring speed level. The active dynamic braking operation comprises operating a motor inverter of an elevator drive unit of the elevator system by switching high-side switches and low-side switches of the motor inverter in a controlled manner so that a rotating field is generated in stator windings of a hoisting motor for dynamically braking the rotation of the hoisting motor and thus the movement of the elevator car. The invention relates also to an elevator drive unit, an elevator system, a computer program, and a computer-readable storage medium.

The application discloses a kind of intelligent vehicle emergency obstacle avoidance brake control method and system, it is related to automatic driving technical field, including: obtaining historical vehicle driving data and historical vehicle user monitoring data, constructs driving behavior analysis model, assesses the reaction ability of vehicle driving user under collision warning;Obtain historical emergency obstacle avoidance brake control trigger scene big data and the collision warning reaction ability of vehicle driving user, construct personalized dynamic braking redundancy space evaluation model, generate the collision warning reaction personalized redundancy space of vehicle driving user;Real-time vehicle surrounding environment data is acquired, with the collision warning reaction personalized redundancy space of vehicle driving user as radius, establish car-road environment collaborative risk field function, output vehicle travel dynamic risk field, establish vehicle emergency obstacle avoidance brake control mechanism, generate the decision of dynamic virtual tow rope.The beneficial effects of the application are: strong robustness is considered to deal with uncertainty, significantly improve the success rate of risk avoidance.

The present examples provide systems and methods for performing hydraulic braking in a vehicle. A system includes a set of hydraulically controlled brakes, a set of valves coupled with the set of brakes and configured to regulate hydraulic pressure applied to the brakes, a first hydraulic system (including a primary hydraulic pressure generator and a first controller), and a second hydraulic system (including a backup hydraulic pressure generator and a second controller). The first controller is configured to receive sensor data. Based on sensor data, the first controller determines a magnitude of hydraulic pressure applied to each hydraulic control brake, sends a pressure command to the main hydraulic pressure generator to generate hydraulic pressure, and sends a valve control command to the second controller using a high-speed communication connection.

A dynamic braking system for an electrified vehicle having a high voltage (HV) battery system and an electric propulsion system includes a regenerative braking system configured to recharge the HV battery system, a vehicle controller configured to monitor and control the regenerative braking system to selectively perform a regenerative braking operation, and a vehicle brake actuator configured to selectively actuate one or more vehicle friction brakes. A brake controller is in signal communication with the vehicle brake actuator and configured for signal communication with a trailer brake actuator to selectively actuate trailer friction brakes. The brake controller is programmed to receive a driver braking request, receive a signal indicating a regenerative braking capacity of the electric propulsion system, and based on the driver braking request and the regenerative braking capacity, automatically adjust a trailer brake gain to (i) maximize energy recovery via regenerative braking and (ii) reduce brake wear.

To provide methods and systems of detecting short circuits in an electrical system, such as a dynamic braking grid of a vehicle.SOLUTION: The methods and systems measure a characteristic of an electrical current that is conducted through one or more resistive elements of an electrical system 104. The electrical current is supplied to the electrical system from a power source 102 as an applied voltage. A resistance change signal representative of a change in one or more electrical resistances of the one or more resistive elements is determined. The resistance change signal is based at least in part on a difference between the characteristic of the electrical current that is measured and a low pass filtered value of one or more of the characteristic of the electrical current that is measured or the applied voltage supplied by the power source. A short circuit event is identified based at least in part on the resistance change signal.SELECTED DRAWING: Figure 1

To provide an electromechanical brake capable of miniaturizing a brake device.SOLUTION: A planetary roller screw 10 including a shaft 20 having a shaft-side thread portion 21, a roller 30 having a roller-side thread portion 31 that meshes with the shaft-side thread portion 21, a piston 50 in which the shaft 20 and the roller 30 are disposed, a cage 40 that supports the roller 30, and a thrust bearing 60 that transmits a load in an axial direction between the roller 30 and the piston 50; The roller 30 moves in the axial direction when the rotation of the shaft 20 is transmitted, and the piston 50 moves in the axial direction when the movement of the roller 30 is transmitted, and applies a pressing force in a direction in which the brake pad 88 is pressed against the brake rotor 90 to the brake pad 88.SELECTED DRAWING: Figure 2