12results about How to "Improved braking stability" patented technology

The invention belongs to the technical field of brake friction materials and powder metallurgy, and discloses a preparation and regulation method for a three-dimensional latticed structure in a copper-based brake friction material. The copper-based brake friction material is mainly composed of copper-coated iron powder, molybdenum disulfide, crystalline flake graphite, silicon dioxide, superfine copper powder and other functional components. Wherein the three-dimensional latticed structure is constructed by superfine copper powder, and the comprehensive performance of the copper-based brake friction material is improved through multiple excellent performances such as high heat conduction performance and mechanical strength of the three-dimensional latticed structure; according to the invention, structural design and preparation are carried out on raw material powder by adopting a method of prefabricated particle preparation and particle bonding and coating, so that all functional components are uniformly distributed on the friction material, a three-dimensional latticed structure can be constructed, and the mechanical property and tribological property of the friction material are greatly improved; the copper-based brake friction material is high in mechanical performance, stable in friction coefficient, high in heat conduction performance, low in wear rate and excellent in performance under extreme working conditions.

The utility model relates to the technical field of wind turbine generator unit, in particular to a kind of yaw brake mechanism of wind turbine generator unit, comprising: pedestal, independently fixedly arranged in the interior of tower body;Brake disc, coaxially installed on rotating main shaft, yaw gear ring is coaxially installed on brake disc outer wall, and brake disc is provided with multiple groups of corrugated structure's heat dissipation holes in axial direction, and the radial section of heat dissipation hole is S type airflow passage;Hydraulic brake unit is installed on pedestal by support mechanism, two friction plate assemblies are arranged on hydraulic brake unit, and brake disc is located in the middle of two friction plate assemblies;It improves brake efficiency, and increases brake stability.

The present application relates to the technical field of automobile brake, and particularly relates to a brake caliper with synchronous wear of friction plates, comprising a caliper body, friction plates, a pushing mechanism and a bidirectional friction mechanism, wherein the bidirectional friction mechanism comprises a synchronization unit for controlling two friction plates to simultaneously abut against a brake disc; the present application can solve the following problems existing in the prior art: the hydraulic reaction force is relied on to push the caliper body to float to realize double-side braking of the brake disc, which causes the two friction plates to have action lag, and the two friction plates cannot simultaneously contact the brake disc, resulting in non-synchronous wear of the two friction plates; the friction plates cannot self-adaptively level, which causes the friction plates to fail to self-adaptively form surface contact when abutting against the brake disc, and local eccentric wear is prone to occur, which aggravates the wear speed of the friction plates and shortens the service life of the friction plates; the present application solves the core problems of non-synchronous wear and eccentric wear of the friction plates through the cooperative action of the lever synchronous driving of the bidirectional friction mechanism and the self-adaptive leveling of the pushing mechanism.

The present disclosure provides an EBD fault adaptive fault-tolerant control method and system, which comprises: collecting vehicle braking related parameters; judging the EBD fault type through cross verification, model prediction residual analysis and CAN communication threshold comparison of the braking related parameters respectively; calculating the fault error corresponding to the EBD fault type, judging the EBD fault level based on the fault error corresponding to the EBD fault type and the preset grade interval threshold; executing the corresponding fault disposal measures according to the EBD fault level, and determining the wheel braking force distribution coefficient; adjusting the braking pump pressure of each wheel, and executing the braking force distribution coefficient. The scheme of the present disclosure can improve the braking efficiency under different EBD faults, and guarantee the braking stability and safety.

The present application relates to the technical field of vehicle electronic control, in particular to a time-varying optimal slip rate prediction and control method for electric vehicles based on time delay characteristics. The time-varying optimal slip rate prediction method in the present application takes the utilization adhesion coefficient, real-time slip rate and time delay factor of the current section as input, combines the known parameters of the reference section, and accurately calculates the time-varying optimal slip rate with the help of the correlation function. The motor braking torque calculation method based on the time-varying optimal slip rate takes the predicted time-varying optimal slip rate as the control target, first establishes a state space equation with the slip rate and its first derivative as state variables and the motor braking torque as the control variable, and discretizes it into a model suitable for digital control, then constructs a cost function that minimizes the slip rate tracking error and torque jump at the same time, obtains the optimal motor braking torque sequence by optimization, and finally outputs the first control variable in the sequence to realize accurate braking of the vehicle.

The invention provides a multi-redundancy intelligent braking system for a heavy vehicle and a control scheme of the multi-redundancy intelligent braking system. The multi-redundancy intelligent braking system comprises a regenerative braking layer; a continuous retarding brake layer; a friction brake layer; the integrated control unit is connected with the regenerative braking layer, the continuous retarding braking layer and the friction braking layer, and when a driver braking request signal and a vehicle state signal are received, the integrated control unit sends corresponding instructions to all the braking layers according to a preset cooperative control strategy so as to distribute needed braking force. The three braking layers and the integrated control unit connected with the three braking layers are arranged, the three braking layers are mutually backed up, even if one layer (even two layers) fails, the system can still provide effective braking, and the braking safety and the braking stability are effectively improved.

The present application relates to a kind of hanging rail inspection systems, comprising: track and inspection robot;The inspection robot includes: robot main body, the auxiliary wheel group being set on the upper side of robot main body, drive wheel group and brake device;The robot main body is based on the auxiliary wheel group clamping hoist in the lower side of track, wherein auxiliary wheel group is set apart with two in the direction of travel of inspection robot;The drive wheel group is provided with the driving roller that abuts with the lower side of track;The driving roller is provided with magnetic attraction wheel part, and magnetic attraction wheel part and the radial dimension of driving roller body are different;The position of the lower side of track is partially provided with the iron condition with the width less than the width of track, and along the width direction of track, the arrangement position of iron condition corresponds with magnetic attraction wheel part;When the driving roller moves to the position of iron condition, the main body of the driving roller keeps abutting with the lower side of track, and magnetic attraction wheel part is attracted to iron condition.

A single-sided dual-caliper front axle for commercial light trucks includes a front axle and a steering knuckle rotatably mounted on the outer end of the front axle. A carbon-ceramic brake disc is supported on the outside of the steering knuckle shaft via a bearing unit. A hub flange is fixed to the outer end of the carbon-ceramic brake disc. The inner and outer friction pads of each set of brake calipers correspond to the two sides of the friction surface of the carbon-ceramic brake disc, respectively. A mounting plate is fixed to the inner side of the steering knuckle, and a set of brake calipers is fixed to the front and rear of the mounting plate, respectively. This utility model is the first to design and match a single-sided dual-caliper front axle for commercial vehicles. By designing the two sets of brake calipers in series, the braking force is doubled, achieving the braking torque of similar air brakes, solving the problem of insufficient braking force of hydraulic brakes. The brake disc, made of a new type of carbon-ceramic material, is particularly suitable for electric vehicles with frequent braking, high braking temperatures, and high requirements for braking stability.

An electronic parking system and a control method thereof relate to the technical field of vehicle chassis braking. The electronic parking system comprises a double control valve, a parking reservoir, a differential relay valve, a brake chamber, an ABS solenoid valve, a temporary parking relay valve, a vehicle controller and a service brake reservoir in communication with the temporary parking relay valve; the parking reservoir is in communication with the double control valve and the differential relay valve respectively; the double control valve is in communication with the parking brake control port of the differential relay valve; the gas outlet of the differential relay valve is in communication with the second gas inlet of the brake chamber; the temporary parking relay valve is in communication with the brake chamber through the ABS solenoid valve; and the double control valve and the temporary parking relay valve are electrically connected with the vehicle controller. The electronic parking control method comprises the electronic parking system. The electronic parking system and the control method thereof are provided to solve the technical problems of high production cost of the whole vehicle, complex control logic of the EPB system and easy occurrence of over-braking of the traditional braking mode to cause wheel locking.

The utility model belongs to lamp auxiliary device technical field, concretely points to controllable type lamp special lift, including shell one and shell two, shell one and shell two are set up and are pasted, shell one and shell two are pasted and form the inside installation space, the installation space in shell one and shell two pasting is provided with brake assembly and power board subassembly, be provided with the pivot on shell two inner wall, the pull line wheel is sleeved on the pivot, the pull line wheel is wound with the lifting line, one end of lifting line is wound in the pull line wheel outer periphery, the other end of lifting line is used for connecting the lamp to be lifted, the pull line wheel is connected with the lifting spring between the pivot, through the electric control, mechanical cooperation control of power board subassembly and brake assembly, can realize accurate braking and stable stay in any position in the lamp lifting process, realize the accurate control of lamp lifting, improve brake stability and structural reliability, prolong the service life of device.

The application relates to the technical field of vehicle motor control, and discloses a double-motor cooperative control system and method for a mine-used double-driver trackless rubber-tyred vehicle, which comprises the following steps: collecting running state data, driver operation data and roadway environment data of the mine-used double-driver trackless rubber-tyred vehicle in real time, analyzing the real-time state of the vehicle, and constructing a first state vector; configuring a double-motor cooperative control mechanism, analyzing the state constraint constructed by the first state vector, respectively calculating target torques of a first driving motor and a second driving motor, and obtaining a first torque instruction; respectively controlling the working processes of the first driving motor and the second driving motor, and collecting state data of the motors in real time; respectively sending the state data of the first driving motor and the second driving motor to a controller of a motor on the opposite side, comparing the rotating speeds of the two motors, calculating corresponding compensation torques, and optimizing the control process of the motors; and the application can improve the driving stability and controllability of the vehicle under complex working conditions, and guarantee the safety of underground personnel and equipment.