1073 results about "Hydraulic brake" patented technology

An electronic control unit for an electronic brake system, and a hydraulic assembly are disclosed. The electronic control unit comprises: a housing having a hydraulic block which is mounted on the front surface thereof and in which a plurality of valves, a flow path, and a pump are provided in order to regulate hydraulic brake pressure transmitted to a plurality of wheel cylinders; a control unit for controlling the plurality of valves and a motor which is accommodated in the housing and provides power to the pump; a first connector provided at the front surface of the housing so that the control unit can be electrically connected to an external device; and a second connector, wherein the first connector is disposed above the position at which the hydraulic block is mounted, and the second connector can be disposed below a reservoir mounted at a first side surface of the hydraulic block.

The invention discloses an electric actuator detection device based on a hydraulic braking principle and a test method thereof. The electric actuator detection device based on the hydraulic braking principle comprises a test bench, a hydraulic braking mechanism, a data acquisition mechanism and a control system. According to the electric actuator detection device based on the hydraulic braking principle, a relation model of dynamic and static action torques of an electric actuator is established through a control system, a complete quantity value tracing chain of multiple parameters of the electric actuator under actual working conditions is established, a recheck detection method outline of a nuclear-grade electric actuator is established, the off-line detection technology of the electric actuator is mastered, and the detection efficiency of the electric actuator is improved. And basic data is provided for online diagnosis of the valve. And full-parameter detection of the electric actuator can be realized through the data acquisition mechanism. Meanwhile, detection of various parameters of the electric actuator under actual working conditions can be simulated. Meanwhile, by means of a hydraulic braking mode, automatic continuous linear adjustment of the load and the load protection function can be achieved, and the load response sensitivity and the valve load simulation performance are improved.

The invention relates to the technical field of loader brake valves, and discloses a hydraulic brake valve and a hydraulic system thereof.The hydraulic brake valve comprises the hydraulic brake valve, the hydraulic brake valve is composed of a one-way valve, a brake valve set, a brake lamp pressure switch, a low-pressure alarm pressure switch, a shuttle valve, a high-low pressure unloading valve and a throttling hole, and the high-low pressure unloading valve and the throttling hole are integrated; a P port, an A port, a B port, a T port, an LS1 port, an LS port, a low-pressure alarm pressure switch and a brake lamp pressure switch are arranged outside the hydraulic brake valve. A liquid filling valve is omitted, an oil source of the full-hydraulic power braking system is taken from an existing priority valve CF port of equipment, pressure feedback signals are selected through a shuttle valve on a hydraulic braking valve, the pressure feedback signals are transmitted to the priority valve, and liquid filling and energy supplementing of the full-hydraulic power braking system or steering work of a steering system is achieved. The brake has the remarkable advantages of being fast in brake response, low in noise, low in failure rate, high in safety coefficient, compact in structure, low in cost and low in energy consumption.

The present invention discloses a hydraulic brake valve and its exhaust process method. The valve body of the exhaust structure touches and presses the operating mechanism at the top of the valve body component of the valve body. A working spring is installed on the valve plug of the valve body. The valve core is installed in the central hole of the valve body and the central counterbore of the plug. The valve core is inserted into the center of the plug, and the counterbore presses the return spring. The return spring is installed on the spring seat, and the spring seat is installed in the counterbore of the plug. The roller of the operating mechanism touches and presses the plug in the valve body to form action and reaction forces, and promotes the operating mechanism and the valve core to touch and press and move to work. The valve core can slide along the inner wall of the valve body. An exhaust hole is provided on the side wall of the valve core. A plug for blocking the other end of the valve body is provided in the valve body, and a spring seat abutting against the plug is further provided in the plug. A return spring is installed between the spring seat and the valve core. The advantages are: avoiding abnormal noises and cavitation phenomena caused by gas accumulation to the hydraulic brake valve, ensuring the normal transmission and circulation of hydraulic oil in the pipeline, and eliminating potential hazards of the hydraulic braking system.

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 utility model relates to a brake system for a two-wheeled vehicle. The brake system comprises a hand brake assembly, a hydraulic brake actuator and an electronic mechanical brake device, the hand brake assembly comprises a brake handle, an outer plunger rod, an inner plunger rod and a displacement sensor, and the inner plunger rod is connected with the hydraulic brake actuator through a hydraulic pipeline; and the hydraulic brake actuator is matched with the front wheel brake disc. The electronic mechanical brake device comprises an EMB actuator, an EMB controller and a power source. The displacement sensor is electrically connected with the EMB controller, and the EMB controller is electrically connected with the EMB actuator; and the EMB actuator is matched with a rear wheel brake disc. According to the braking system, a single plunger rod is optimized into the inner plunger rod and the outer plunger rod, so that the inner plunger rod and the outer plunger rod do not work synchronously during braking, the sequence of activating the EMB first and then activating the EHB is achieved, braking force of front and rear wheels during braking can be tuned, the braking process of a vehicle is controlled in a stepped mode, and the braking efficiency of the vehicle is improved. The effect that the vehicle keeps stable in the braking process is achieved.

A brake system for hydraulically actuating a pair of front wheel brakes and a pair of rear wheel brakes includes a master cylinder fluidly connected to a reservoir and operable to provide a brake signal responsive to actuation of a brake pedal connected thereto. The master cylinder is selectively operable during a manual push-through mode by actuation of the brake pedal to generate brake actuating pressure at an output for hydraulically actuating a selected one of the pair of front and rear wheel brakes. A first power transmission unit is configured for actuating the selected one of the pair of front and rear wheel brakes. A second power transmission unit is configured for actuating the other one of the pair of front and rear wheel brakes. A first electronic control unit is provided for controlling at least one of the first and second power transmission units.

The invention discloses an unmanned mining dump truck hydraulic braking system and a control method. The unmanned mining dump truck hydraulic braking system comprises a service brake valve set and a parking brake valve set. The service brake valve group comprises a first hydraulic proportional pressure reducing valve, a second hydraulic proportional pressure reducing valve, a first shuttle valve and a first pressure sensor; the first hydraulic proportional pressure reducing valve and the second hydraulic proportional pressure reducing valve are connected in parallel; oil outlets of the first hydraulic proportional pressure reducing valve and the second hydraulic proportional pressure reducing valve are communicated with an oil inlet of a first shuttle valve; an oil outlet of the first shuttle valve is connected with a first pressure sensor; the parking brake valve group comprises an electromagnetic directional valve, a redundant electromagnetic directional valve and a pressure switch; the electromagnetic directional valve is a normally closed valve, and the redundant electromagnetic directional valve is a normally open valve; the electromagnetic directional valve and the redundant electromagnetic directional valve are connected in series, the electromagnetic directional valve is connected with an oil inlet pipeline, the redundant electromagnetic directional valve is connected with an oil outlet pipeline and a parking brake caliper, and a pressure switch is arranged on the oil outlet pipeline.

The invention relates to the technical field of vehicle control systems, and provides a vehicle attitude control optimization system based on an electro-hydraulic brake valve, which comprises a data acquisition unit, a driving mode recognition unit, an electro-hydraulic brake valve adjustment simulation unit, a vehicle driving simulation unit, a data comparison unit, a control optimization unit and the like. And simulating an electro-hydraulic brake valve adjustment strategy according to the driving mode and the vehicle driving state data, and verifying an adjustment effect by using the vehicle driving simulation model. And if the simulation result is not consistent with the real-time data, model parameters are optimized through a genetic algorithm, the system can adapt to different driving modes and road conditions, the control strategy is dynamically adjusted, the adjustment smoothness and fuel efficiency of the electro-hydraulic brake valve are improved, and stable power driving is provided for the vehicle.

The invention discloses a method (100) for operating an electro-hydraulic brake control unit (1) of a motor vehicle with several hydraulic output connections (4a-4d) for hydraulically actuated wheel brakes (5a-5d) and an electrically controllable first pressure source (2) for hydraulically pressurizing the wheel brakes (5a-5d), which is formed by a cylinder-piston arrangement with a pressure chamber (30) and a piston (31) as well as an electromechanical actuator with an electric motor (32), wherein, to generate a predetermined hydraulic pressure by means of the first pressure source (2), a basic motor torque is generated by the electric motor (32) and an oscillating motor torque is superimposed on the basic motor torque. The invention further discloses an electro-hydraulic brake control unit (1) which is configured to carry out such a method (100).

The invention discloses a braking energy distribution method and system based on braking noise prediction and electronic equipment. The method comprises the steps that braking noise time sequence data, vehicle speed time sequence data, hydraulic braking torque time sequence data and pedal travel time sequence data of a current vehicle are obtained; inputting the braking noise time sequence data, the hydraulic braking torque time sequence data and the pedal travel time sequence data into a pre-trained braking noise prediction model to obtain a braking noise prediction value of the current vehicle after a preset time step; determining a corresponding braking noise threshold value according to the current working condition and the current driving mode of the current vehicle; and when the braking noise prediction value is larger than the braking noise threshold value, the braking energy distribution proportion is adjusted, so that the energy recovery torque is increased, and the hydraulic braking torque is reduced. According to the method, the braking noise of the vehicle is maintained below the threshold value through dynamic distribution of the braking energy, interference to users in the vehicle is avoided, the driving comfort of the vehicle is improved, and the method can be applied to the technical field of vehicle control.

The invention discloses an enhanced braking system for a mountain railway vehicle, which relates to the technical field of railway vehicle braking control, and comprises the following steps: acquiring a rail position vector and an arc length, calculating a rail curvature and a rail gradient, and combining the current speed and the target speed of the vehicle to solve a braking demand acceleration value and generate a gradient parameter and a curve parameter; according to the braking force distribution proportion, a wheel rail hydraulic braking torque value is adjusted, the meshing depth and the vibration frequency of a rack rail brake are controlled through a rack rail action instruction, and a wheel rail system state report and a rack rail work log are generated; and gradient parameters, actual adhesive force numerical values and toothed rail meshing efficiency in the braking process are extracted from a wheel-rail system state report and a toothed rail work log, and closed-loop optimization is carried out in combination with a terrain braking curve. Self-learning and self-adaptive adjustment are carried out on the braking process through closed-loop feedback and parameter optimization, so that the energy utilization efficiency is improved and the service life of key components is prolonged while the braking efficiency is guaranteed.

The invention belongs to the technical field of vehicle braking control, and provides a vehicle braking system failure auxiliary processing method, system and device and a medium. When the state is a non-failure state, executing a pressure building braking strategy; when the vehicle is in the failure state, an auxiliary processing strategy is executed, and the auxiliary processing strategy comprises the steps that the braking intention is judged based on vehicle braking feedback, and vehicle stability control threshold setting, deceleration distribution of electric braking and hydraulic braking, active adjustment of the braking pressure and active adjustment of the motor torque are sequentially completed based on the judgment result; and the wheel slip rate of the vehicle is monitored in real time, and the steering force of the vehicle is corrected in combination with vehicle braking feedback. While the deceleration of the vehicle meets the requirement of a driver, drifting or rollover of the vehicle due to the fact that the driver suddenly turns the steering wheel can be avoided, so that the stability of the vehicle is ensured.

The invention provides a control method and device which can be applied to the field of intelligent driving. The method comprises the steps that the electric braking recovery torque of a front axle and the electric braking recovery torque of a rear axle of the vehicle are obtained, and the ratio of the electric braking recovery torque of the front axle to the electric braking recovery torque of the rear axle is smaller than a preset distribution ratio; when hydraulic braking torque compensation is triggered, the hydraulic braking torque of the front axle is determined according to the electric braking recovery torque of the rear axle, the braking torque determined according to the preset distribution ratio and the electric braking recovery torque of the front axle; and controlling a hydraulic brake of the front axle to work according to the hydraulic braking torque of the front axle. The embodiment of the invention can be applied to an intelligent automobile or a new energy automobile, and is helpful for preventing the EBD function from being triggered too early in a vehicle braking process.

A hydrostatic rotary machine includes (i) an inner element and an outer element which are coaxial and mounted with the ability to rotate one with respect to the other about an axis of rotation, one of these elements being a rotor and the other of these elements being a stator, (ii) a brake counter-disc which is mounted on the distribution hub, which extends radially around the distribution hub, and which is rotationally coupled to the outer element, (iii) a passive-braking piston designed to activate a brake under the effect of an elastic element and which is mounted with axial mobility with respect to the brake counter-disc, and (iv) a hydraulic brake-release chamber positioned between the brake counter-disc and the passive-braking piston.

The invention relates to the field of tire type walking equipment, and discloses a load-sensitive hydraulic brake valve and a load-sensitive hydraulic system thereof, and the load-sensitive hydraulic system comprises the load-sensitive hydraulic brake valve, a load-sensitive pump, a priority valve, a steering hydraulic system, a working hydraulic system, a shuttle valve and corresponding connecting pipelines; a P port, an A port, a B port, a T port, an LS1 port, an LS port, a low-pressure alarm pressure switch and a brake lamp pressure switch are arranged outside the load-sensitive hydraulic brake valve. According to the system, full-hydraulic dynamic braking can be achieved on equipment without a prefill valve, the equipment efficiency is improved, the installation cost is reduced, the energy consumption is reduced, and the service life is prolonged. Wherein the load-sensitive hydraulic brake valve integrates a brake function, a pressure maintaining function, a high-low pressure switching function, a pressure signal selection function and a pressure alarm function; the invention has the advantages of fast braking response, low noise, low failure rate, high safety coefficient, compact structure, low cost, low energy consumption and long service life.

The invention relates to a braking system, a control method thereof and a vehicle, and the control method comprises the following steps: after a braking instruction is obtained, obtaining the states of a first caliper assembly and a second caliper assembly, and when an electronic braking mode of the first caliper assembly is in a failure state, starting a braking mode of the second caliper assembly; according to the braking instruction, the first caliper assembly is controlled to conduct hydraulic braking on the front wheels of the vehicle in the hydraulic braking mode, and the second caliper assembly can be controlled to conduct electronic braking on the rear wheels of the vehicle. Besides, when the electronic braking modes of the first caliper assembly and the second caliper assembly fail, the front wheels of the vehicle can be braked through the hydraulic braking mode of the first caliper assembly, the backup braking function is achieved, and the braking safety of the vehicle is improved.

The invention discloses an intelligent hydraulic braking method and system for a trailer, and relates to the technical field of trailer braking. The intelligent hydraulic braking method comprises the steps that a braking signal is collected, and the braking pressure requirement of the trailer is calculated; the torque requirement of the motor and the PWM signal requirement of the electromagnetic valve are calculated; the output torque of the motor is adjusted in real time so as to adjust the brake pressure, the required brake pressure is output to a brake on wheels of the trailer, and follow-up braking of the trailer is carried out; identifying the wheel locking condition and the vehicle body swinging condition of the trailer; wheels needing to be controlled and a required control mode are determined; and a brake on a wheel of the trailer is controlled. By acquiring the braking requirement, the braking pressure requirement and the trailer wheel locking and trailer body swinging conditions, the required hydraulic braking force is output to the brake of the trailer, the following braking function can be achieved, the braking safety of the trailer is guaranteed, the anti-locking function and the trailer stabilizing function can be achieved, and the braking safety of the trailer is guaranteed. And the driving stability and the driving comfort are ensured.

The invention discloses an electro-hydraulic brake-by-wire system based on a CPS architecture and an energy optimization method. The method comprises the following steps: acquiring driver input data of a vehicle and working condition data of vehicle driving; performing data processing on the driver input data and the vehicle driving working condition data; working condition prediction is carried out according to the processed data, and a rolling time domain driving working condition prediction result is obtained; according to the obtained working condition prediction result, an electro-hydraulic composite braking overall objective function is solved, and an optimal braking strategy is obtained; and vehicle braking is conducted according to the optimal braking strategy, and braking system energy optimization is completed. Braking is conducted according to the current vehicle state in combination with working condition prediction, the energy optimization strategy is perfected, reasonable braking torque distribution is achieved, energy consumption of the electro-hydraulic composite braking system is further reduced, and energy conservation and emission reduction of the whole life cycle of the vehicle are achieved.

The invention relates to the technical field of braking systems, in particular to an electro-hydrostatic braking system of an unmanned aerial vehicle. The electro-hydrostatic brake system of the unmanned aerial vehicle is only provided with two sets of hydraulic pipelines; wherein one set comprises a first hydraulic power unit, a first pipeline, a first normally open solenoid valve, a second pipeline and a first hydraulic braking module; the other set comprises a second hydraulic power unit, a third pipeline, a second normally open solenoid valve, a fourth pipeline and a second hydraulic brake module; when the first hydraulic power unit breaks down, the flight controller controls the first normally-open electromagnetic valve to be closed and controls the normally-closed electromagnetic valve to be opened, so that oil is supplied to the first hydraulic braking module through the second hydraulic power unit. When the second hydraulic power unit breaks down, the flight controller controls the second normally-open electromagnetic valve to be closed and controls the normally-closed electromagnetic valve to be opened, so that oil is supplied to the second hydraulic braking module through the first hydraulic power unit. The air load weight of the unmanned aerial vehicle is reduced, so that the effective load of the unmanned aerial vehicle is improved.

The invention provides a longitudinal control method and device.The longitudinal control method can be applied to a longitudinal control system composed of an automatic driving controller, a motor controller and a hydraulic braking controller, and the method comprises the steps that the automatic driving controller obtains braking demand torque; the automatic driving controller sends a first instruction to the motor controller and sends a second instruction to the hydraulic braking controller according to the relation between the braking demand torque and the maximum recovery torque of the motor controller; the motor controller controls the driving motor to perform electric braking according to the first instruction; and the hydraulic brake controller controls the hydraulic actuator to execute corresponding operation according to the second instruction. The embodiment of the invention can be applied to an intelligent automobile or an electric automobile, and is helpful for reducing the time delay in the braking process, thereby being helpful for improving the driving safety of a user.

The invention provides an energy recovery control method and device based on electro-hydraulic distribution, equipment and a medium, and relates to the technical field of vehicle control, and the method comprises the steps that when a vehicle meets the sliding energy recovery condition, the sliding recovery torque of the vehicle is obtained; when the vehicle meets the braking energy recovery condition, the braking torque and the torque recovery limit value of the vehicle are obtained; according to the first comparison result of the braking torque of the vehicle and the torque recovery limit value, the electric braking recovery torque and the hydraulic braking force are determined; actual hydraulic braking force of the vehicle is obtained; according to a second comparison result of the hydraulic braking force and the actual hydraulic braking force, the state of a braking controller and an electric braking compensation value are determined; and superposing the sliding recovery torque, the electric braking recovery torque and the electric braking compensation value as a target recovery request torque for energy recovery. According to the technical scheme, the braking relation between electric braking and hydraulic braking can be flexibly processed, braking safety is guaranteed, and the recovery rate of braking energy is increased.

A brake system for a vehicle may include at least two hydraulic brake circuits, each having at least one hydraulically acting wheel brake, at least two pressure supply devices, each of which is driven by an electromotive drive, at least one valve assembly having valves for the wheel-individual adjustment of brake pressures and / or for separating the wheel brakes from, or connecting same to, a pressure supply device, at least one electronic control and regulating unit, one of which is a superordinate central control unit that controls individual control and regulating units of the components of the brake system, as well as at least one additional electric drive motor for at least one axle or wheel of the vehicle. The brake system may use the at least one pressure supply device and / or the at least one electric drive motor for controlling pressure in at least one wheel brake for steering interventions.

An electric hydraulic brake includes: wheel brakes configured to braking force to wheels of a vehicle; a reservoir storing brake oil; a master cylinder connected to the reservoir, and operated in conjunction with a main brake motor to generate pressure of the brake oil; a first controller configured to control the main brake motor; a hydraulic controller including a pump configured to form pressure of the brake oil in conjunction with an auxiliary brake motor, and a hydraulic block configured to selectively transmit the pressure of the brake oil formed in the master cylinder or the pump to the wheel brakes; and a second controller configured to control the auxiliary brake motor when the master cylinder or the first controller malfunctions. The hydraulic controller is provided with an auxiliary flow path to transmit the brake oil from the reservoir to the pump directly through the auxiliary flow path.

Braking system with: a hydraulic brake device for generating a friction braking force comprising a pedal (16), at least one brake caliper (21a - 21d) a main pressure generating device (200) with a main cylinder (212) and a piston (251) which pressurizes the main cylinder (212), a wheel pressure generating device (300) for generating a hydraulic pressure in the at least one brake caliper (21a - 21d); and a regenerative braking device (18) and a brake control device (100) for calculating a braking force distribution between friction brakes and regenerative braking, wherein the braking system is configured to adjust a total braking force (Ft) based on a pedal reaction force and a displacement amount of the piston (251) that pressurizes the master cylinder (212), or adjust the total braking force (Ft) based on the pedal reaction force and the generated hydraulic pressure in the at least one brake caliper (21a - 21d) to keep the total braking force (Ft) at a constant level when transitioning from regenerative braking to friction braking in response to a reduction in vehicle speed.

The utility model discloses an electronic pedal structure for brake-by-wire, which comprises a pedal support and a pedal arm rotationally connected to the pedal support through a pedal shaft, and further comprises a pedal simulator arranged below the pedal arm, the pedal simulator is provided with a central axis, and the pedal simulator can stretch out and draw back in the extending direction of the central axis. The two ends of the pedal simulator in the telescopic direction are flexibly connected with the pedal arm and the pedal support respectively, the pedal support is provided with a mounting face, the included angle between the mounting face and the central axis ranges from 80 degrees to 100 degrees, and projections of the pedal shaft and the pedal simulator on the plane where the mounting face is located are staggered. The height of the pedal support in the electronic pedal structure is small, so that the structural size of the pedal support is small; in addition, the electronic pedal structure and an original hydraulic brake pedal can be installed on an automobile in a replaceable mode, and therefore the transition requirement of the hydraulic pedal and the electronic pedal is met in stages.

A brake traction control system (BTCS) using a redundancy braking system includes a main braking force adjusting device configured to control a hydraulic brake of a vehicle, a sensor unit configured to detect a driving state of the vehicle, an electronic brake electrically operating and configured to generate braking force for at least one driving wheel, and an auxiliary braking force adjusting device configured to control the hydraulic brake and the electronic brake when a failure occurs in the main braking force adjusting device, wherein the auxiliary braking force adjusting device is configured to adjust the braking force of the electronic brake provided on at least one wheel on left and right sides of the vehicle based on a detected value of the sensor unit.

A method, a device, a controller, and a computer program product for comfortable braking are disclosed. The method includes (i) determining a comfortable braking force based on an openness of a brake pedal of a vehicle, (ii) obtaining a current hydraulic braking force of the vehicle, (iii) requesting a drive force from a vehicle control unit in response to the hydraulic braking force being greater than the comfortable braking force, and (iv) performing comfortable braking on the vehicle based on the hydraulic braking force and the drive force. The above method enables the realization of the comfortable braking function with the participation of hydraulic brakes, which improves the flexibility of the comfortable braking by simultaneously utilizing the hydraulic braking force and the drive force, and expands the application scene of the comfortable braking, thereby improving the ride experience of drivers and passengers.

The brake control unit according to one embodiment serves to control, for example, a hydraulic brake capable of generating a hydraulic braking force on both the front and rear wheels of a four-wheel drive vehicle, and an electric parking brake capable of generating a parking braking force, different from the hydraulic braking force, on the front wheels or on the rear wheels, wherein the brake control unit is provided with: a detection unit for detecting an actuation of the parking brake in order to cause the electric parking brake to generate a parking braking force;and a control unit for reducing the hydraulic braking force generated on the front wheels and on the rear wheels, and adjusting the hydraulic braking force generated on the other from the front wheels or the rear wheels to a level that allows a steady state of the vehicle to be maintained before a parking brake force is generated by the electric parking brake when an actuation of the parking brake is detected, while a steady state is maintained solely by the hydraulic braking force generated on both the front and rear wheels.

The present disclosure relates to methods (100, 200, 300) for controlling a wind turbine (10) during a yaw operation. The present disclosure further relates to control systems (92) for wind turbines and to wind turbines (10). A method for operating a wind turbine (10) during yaw operation comprises operating one or more yaw drives (35) to rotate the nacelle (16) with respect to the tower (15). In addition, the method comprises predicting an end of the yaw operation and, in response to predicting an end of the yaw operation, actuating a hydraulic brake (94) before the predicted end.