35results about How to "Realize the synchronization function" patented technology

The invention provides a test platform and method for synchronous control over multiple mechanical arms, and belongs to the technical field of synchronous control simulation. The test platform is characterized by comprising simulation control units and execution units. The simulation control units include an upper computer, a DSPACE platform and an ARM platform, wherein the upper computer, the DSPACE platform and the ARM platform are connected in sequence, and the ARM platform is connected with one or more distributed synchronous controllers and the upper computer at the same time. The execution units are mechanical arm execution units which correspond to the synchronous controllers and are connected with the ARM platform. The test method comprises the following steps of modeling the mechanical arms, simulating a kinetic model of the mechanical arms, converting and issuing a synchronous control code, dispatching the ARM platform, executing the synchronous controllers, moving the mechanical arms, and finishing a simulation test. The test platform and method for synchronous control over the multiple mechanical arms have the advantages of being high in universality and openness and capable of providing a testing environment for most nonlinear complex network control algorithms.

The invention discloses a synchronization system and a vehicle with the synchronization system. The synchronization system comprises a transmission shaft, a shifting gear, asynchronous hub, a gear sleeve, a synchronous sliding block, a locking and stopping block and asynchronous ring, wherein the shifting gear is arranged on the transmission shaft in a sleeving manner; the synchronous hub is arranged on the transmission shaft in a sleeving manner; the gear sleeve is arranged on the synchronous hub in a sleeving mode and can move between a neutral gear position and an in-gear position; the synchronous sliding block is arranged on the synchronous hub; the locking and stopping block is arranged on the synchronous hub, and when the gear sleeve is located at the in-gear position, the gear sleeve is stopped by the locking and stopping block so as to stop the gear sleeve from moving to the neutral position; the synchronous ring is arranged in a sleeving manner; when the gear sleeve is locatedat the neutral position, the gear sleeve is meshed with the synchronous hub and is separated from the shifting gear; when the gear sleeve moves from the neutral position to the in-gear position, thegear sleeve pushes the synchronous ring to make contact with the shifting gear through the synchronous sliding block; and when the gear sleeve is located at the in-gear position, the gear sleeve is meshed with the synchronous hub, the synchronous ring and the shifting gear. According to the synchronization system disclosed by the embodiment of the invention, the functions of synchronization, gearlocking and centering can be achieved, and the structure is compact.

The invention provides a composite power synchronous control system and method for a voltage source converter, and the method comprises the steps: enabling a DC voltage source Vdc to output a voltage u through the converter, enabling the DC voltage source Vdc to be connected with an AC power supply e through a filter Lf, and measuring a common coupling point voltage v and a line current i at a connection point of the Lf and the e; calculating actual active power p and reactive power q; based on the power p, the power q, the preset work power pref and the preset reactive power qref, calculating a reference angle theta required by Park transformation or Park inverse transformation coordinate transformation; transforming the voltage v and the current i from a three-phase static coordinate system to a two-phase rotating coordinate system according to the reference angle theta to obtain transformed vd and vq and transformed id and iq; calculating a current reference value according to vd and vq; calculating a reference voltage required by PWM modulation according to id, iq and a current reference value; and converting the reference voltage from a two-phase rotating coordinate system to a three-phase static coordinate system according to the reference angle theta, and providing a control signal for the converter through a PWM link.

The invention discloses a transmitting end circuit based on a JESD204B protocol, which belongs to the technical field of high-speed data transmission and comprises a transmission layer, a scrambling module and a data link layer. The transmission layer comprises a data combination module and a mapping unit and is used for realizing mapping from original sampling data to channel data; the scramblingmodule is used for scrambling the data output by the transmission layer; and the data link layer comprises a synchronization module, a control character insertion module and a coding module, the synchronization module realizes a protocol synchronization process, the control character insertion module inserts control characters into a data stream according to a protocol rule, and the coding modulerealizes 8B/10B coding.

The invention discloses a synchronization detection closing grid-connected method and equipment for a flexible low-frequency power transmission system. The method comprises the following steps: disconnecting all switches of a grid-connected converter station; switching on a power frequency network side switch and a power frequency valve side switch of the grid-connected converter station, and charging a capacitor in the converter; in response to the fact that the capacitor voltage of the converter is stable, unlocking the converter, and controlling the low-frequency side to reach the rated voltage; in response to the fact that the capacitor voltage mean value and the low-frequency side voltage of the converter reach rated values, if a low-frequency bus side voltage transformer detects no voltage, a low-frequency valve side switch and a low-frequency network side switch are directly switched on for grid connection; if the low-frequency bus side voltage transformer detects voltage, the low-frequency valve side switch is directly switched on, then the low-frequency network side switch is detected to be switched on synchronously for grid connection, or the low-frequency network side switch is directly switched on, then the low-frequency valve side switch is detected to be switched on synchronously for grid connection. According to the invention, the number of low-frequency voltage transformers is reduced, the cost and complexity of the system are reduced, and engineering application is promoted.