31results about How to "High braking precision" patented technology

The invention provides a brake force real-time adjusting method based on a brake-by-wire system. The brake force real-time adjusting method comprises following steps: respectively obtaining objective position signal values of motors in various electronic and mechanical brakes of front wheels and/or rear wheels of a brake vehicle according to strokes of electronic brake pedals; respectively acquiring actual position signal values, actual rotation speed signal values and actual current signal values of the motors in real time; and respectively realizing real-time closed-loop control for positions, rotation speeds and current of the motors according to deviation between the objective position signal values and the actual position signal values of the motors, the actual rotation speed signal values and the actual current signal values, and accordingly adjusting actually outputted brake force of the electronic and mechanical brakes with the motors in real time. Correspondingly, the invention provides a brake force real-time adjusting device. The brake force real-time adjusting method and the adjusting device can suppress fluctuation generated when brake force is adjusted in real time in the prior art, stability of the brake-by-wire system is improved, and a braking effect is good.

The invention discloses a single-vane type oscillating cylinder, comprising vanes, a rotor, a stator and a cylinder body, the vanes, rotor and stator are arranged in the cylinder body, the rotor is arranged at the bottom of the vane, and the stator is arranged at the bottom of the rotor. The single-vane type oscillating cylinder is small in size, simple in structure, light in weight and higher in braking precision.

The invention relates to a high-precision brake mechanism which comprises a brake switch, a brake disc, a switch connecting frame, a rotating shaft and a drive device; the drive device is connected with the input end of the rotating shaft. The high-precision brake mechanism is characterized in that the brake disc is mounted on a shaft shoulder of the rotating shaft and performs rotary motion along the rotating shaft; the brake switch comprises an electromagnetic switch, a reset spring and an iron core and is mounted on the switch connecting frame; the iron core is inserted in a columnar through hole in the electromagnetic switch, and the connection between the electromagnetic switch and the iron core is completed by the reset spring; the brake disc comprises a fixed base and six disc teeth with the same structure; the six disc teeth are uniformly distributed on the cylindrical side surface of the fixed base by taking the fixed base as a center, each of the disc teeth is from the connecting end of the fixed base to the tail end of the disc tooth, and the width of each of the disc teeth gradually reduces; V-shaped grooves are symmetrically formed in the two sides at the tail end of each of the disc teeth; the fixed base is in the shape of a cylinder with a cover-sealed bottom end.

The invention discloses a railway vehicle air brake parking control method. The method comprises: obtaining a first preset relation between the speed and the friction coefficient under different brakeforces; obtaining the current braking force and the current speed of the rail vehicle to obtain the current friction coefficient; correcting the current friction coefficient according to the obtainedcurrent deceleration to obtain a corrected friction coefficient; comparing whether a current deviation between the current deceleration and a preset deceleration is within a preset deviation range, and if so, obtaining a current braking force corresponding to the current friction coefficient; and if not, obtaining a corrected braking force corresponding to the corrected friction coefficient. Thecurrent friction coefficient is accurately obtained according to the current speed and the current braking force, the current friction coefficient is corrected to obtain the corrected friction coefficient, and the accurate friction coefficient is selected between the current friction coefficient and the corrected friction coefficient according to the current deceleration, so that the braking forceis closer to an accurate value, and the braking precision is higher. The invention further discloses a railway vehicle air brake parking control system.

The invention discloses a high speed rail braking method and a high speed rail braking system based on multiple intelligent bodies. The high speed rail braking method based on the multiple intelligent bodies includes the following step: step S110, using a braking device to receive external angle acceleration magnitude, and obtaining initial control parameter value according to a preset function relationship between the external angle acceleration magnitude and a control parameter value, and further includes the following steps: step S120, obtaining current angle acceleration magnitude of a plurality of wheel sets through detection; step S130, obtaining an actual control parameter value of each current wheel set according to a function relationship among the current angle acceleration magnitude, the current angle acceleration magnitude of two adjacent wheel sets, the external angle acceleration magnitude and the initial control parameter value of each current wheel set, which are preset; step S140, using the breaking device to brake the corresponding wheel sets according to the actual control parameter values, and returning to the step S110. The high speed rail braking method based on the multiple intelligent bodies can simultaneously consider influence factors between time delay constraint and each wheel set, and difference between braking effects of the high speed rail braking method based on the multiple intelligent bodies and expected braking effects is small, and furthermore braking accuracy is high.

The invention relates to a textile mechanical device capable of automatic positioning. When the main motor drives the main shaft to slow down slowly under the control of the frequency converter, the bottom dead center sensor starts to detect the number of times the crank reaches the bottom dead center. When the number of points is less than 30 times per minute, under the control of the controller, the positioning gear controlled by the clutch is started, and the positioning gear starts to work; at the same time, when the bottom dead center sensor detects that the crank reaches the bottom dead center, the counting sensor starts to record the positioning The number of rotations of the gear, when the number of rotations of the positioning gear reaches a certain value, the controller starts the stop signal, and the frequency converter of the main motor stops. At this time, the crank just stops at the top dead center position, which plays the role of automatic positioning.

The invention relates to the technical field of precision actuation, in particular to an electric control vector magnetic field device and an installation method thereof. The device comprises: a sample table, wherein a sample support is arranged on the sample table; a magnetic field control mechanism which comprises a moving part and a driving part for driving the moving part to do precise linearmotion, wherein a permanent magnet is loaded at the end part of the moving part, and the extension lines of the moving direction and the polarization direction of the permanent magnet are orthogonal to the center of the sample support. Precise actuation of the permanent magnet in one direction is controlled through the magnetic field control mechanism, the permanent magnet is accurately controlledto be close to or away from a sample on the sample support, and therefore the magnetic field intensity of the sample is accurately controlled. The electric control vector magnetic field device is compact in structure, high in braking precision and large in magnetic field regulation and control range.

The invention discloses a hydraulic brake control system, a hydraulic control method and related equipment. The system comprises an energy storage assembly, a control assembly and an execution assembly. The control assembly comprises boosters, a brake master cylinder and a brake pedal, the brake master cylinder comprises at least two piston cavities, the boosters are connected to the piston cavities respectively, and the boosters are used for controlling the pressure of the piston cavities according to the displacement of the brake pedal so as to send out a brake instruction; the execution assembly is used for executing the braking action corresponding to the control instruction sent by the control assembly. The booster is connected with each piston cavity of the brake master cylinder, the pressure of each piston cavity can be directly controlled through the displacement of the brake pedal, the execution assembly completes the braking action based on the pressure, the braking action is faster, the pistons do not move in the cavities, and complete decoupling of multi-piston movement is achieved.