75results about How to "Reduce control delay" patented technology

The invention provides a control system, valve base control equipment and a submodule integration method. Valve base control equipment consists of two symmetric screen cabinets, wherein each screen cabinet is provided with a power supply unit, a current control unit and a bridge arm control unit; and controllers of the valve base control equipment, a control system and a submodule are connected with one another through optical fibers. All communication interfaces are in a CRC (Cyclic Redundancy Check) check based optical fiber serial communication mode of a reverse Manchester encoding form, so that data throughput is greatly increased, system control time delay is reduced, and real-time control and protection functions of a modularized multi-level flexible direct current valve can be finished. In the method, a hardware structure of the current control unit and the bridge arm control unit is adopted, so that system-level current balance control and valve-level capacitive voltage balance control are clearly divided, and the requirements for modularized multi-level real-time control are met.

The invention discloses a control method based on a dual-vector resonance adjusting double-fed asynchronous wind driven generator. The control method utilizes dual-vector resonance adjusting technology. Vector resonance adjusting with angular frequency being double base frequency can restrain adverse influence caused by negative sequence components in power grid voltage. Vector resonance adjusting with angular frequency being six-fold base frequency can adverse influences caused by five-time harmonic wave components and seven-time harmonic wave components in power grid voltage. No negative sequence and harmonic component extraction of power grid voltage, stator current or rotor current during all closed-loop adjusting is needed. By the method, no complex positive negative sequence and harmonic component extraction is needed, no complex rotor current reference calculation is needed, control delay is reduced greatly, and quickness and stability of a system is improved.

The invention provides an AGV automatic guiding system and a method thereof. The system includes a center control system (1), an on-site controller (2), a communication module (3), a motor driving module (4), a walking mechanism (5), a guiding mechanism (6), four magnetic sensors (7) and two magnetic guide rails (8). According to the invention, two magnetic guide rails of different frequencies are arranged, and under a normal operation state, the four magnetic sensors are disposed on an AGV bottom disc in a rectangular shape and separately reads the frequencies of the left magnetic guide rail and the right magnetic guide rail so as to prevent extra interference; when a small vehicle drives offset a rail, an offset angle can be calculated in combination with the time when a magnetic sensor loses a signal, the velocity of the small vehicle and the distance between the guide rails. The low complexity of the calculation can effectively lower operation task volume of the controller. Therefore, under same hardware conditions, the system and the method can effectively shorten control delay and lower guiding errors.

The present invention discloses a robust delay compensation grid-connected control method of an LCL inverter. The method mainly comprises three parts which are power feedforward control, voltage outer ring control and current inner ring robust delay compensation grid-connected control, wherein the power feedforward control can speed up the unidirectional transfer process from photovoltaic DC side energy to grid AC side energy, and the transient response of the system is accelerated, the voltage outer ring control is used for stabilizing DC side capacitance voltage, and robust delay compensation grid-connected control is employed by a current inner ring. The method comprises a capacitive current feedback delay compensation and zero pole delay compensation policy, the control delay of a system is effectively reduced, the robustness and dynamic performance of the system are improved, and a high quality grid-connected current feed-in grid is realized. According to the method, the LCL inverter has higher robustness and a fast dynamic response, and the need of an inverter grid-connected operation is satisfied.

The invention discloses a DFIG (Double-Fed Induction Generator) system control method based on a resonance sliding mode. By adopting direct torque/power control, the electromagnetic torque and the reactive power of a motor and the active power and the reactive power output by a grid-side converter can be directly controlled. Moreover, since steps of extracting complex negative sequence and all harmonic components and calculating rotor current reference values are eliminated, decomposition delay is not introduced. Through sliding mode control based on resonance, negative influences introduced by grid voltage harmonic to the electromagnetic torque and the reactive power of the motor and the active power and the reactive power of the grid-side converter can be eliminated, so that the effects of stable output, smaller steady-state errors and better dynamic response characteristics are reached and the expected control effect is reached. The DFIG system control method based on the resonance sliding mode has the advantages that since extraction of the complex negative consequences and all the harmonic components are not required to be conducted and grid voltage phase estimation and complex current reference value calculation are also not required to be conducted, the control delay can be greatly reduced and the rapidness and the stability of the system are enhanced.

The invention provides a method and a system used in a turbocharged engine. The turbocharged engine comprises a separated air intake system connected with a separated exhaust system. Air inflations of different components, pressures and temperatures can be transmitted to the engine at different circulation points of the engine via the separated air intake system, so that the boost and EGR benefits can be expanded.

The invention relates to a method for reducing cloud deck control delay in a network video monitoring platform, and the method is technically characterized by comprising the following steps: (1) starting the network video monitoring platform, connecting the network video monitoring platform to a front-end device, and starting the shift detection function of the front-end device; (2) performing shift detection on each video previewing channel by the network video monitoring platform, thereby acquiring the motion state of the previewing video of each channel in real time; and (3) dynamically distributing the maximum code rate of each channel by the network video monitoring platform according to the motion state of the previewing video of each channel. The method provided by the invention has the advantages that the design is reasonable and the cloud deck control delay in the network video monitoring platform is reduced without improving the conditions of the current network and other hardware resources through utilizing the network video monitoring platform to acquire the motion state of the previewing video of each channel at real time, dynamically distribute the maximum code rate of each channel according to the priority of the motion state of the previewing video of each channel and dynamically manage the network resource.

The invention discloses a cloud game acceleration method, a cloud game acceleration device, a readable storage medium and computer equipment. The method is applied to a client terminal. The method comprises the steps of receiving game operation data generated when a user performs game operation on the client terminal, and sending the game operation data to a cloud server; receiving game video dataand motion vector information issued by the cloud server, and decompressing the game video data to obtain a key frame, the motion vector information being motion vector estimated data generated by the cloud server according to the game operation data; and generating a new image frame according to the key frame and the motion vector information, and displaying the new image frame before the cloudserver issues the next frame corresponding to the key frame. The problem of control delay in the prior art can be solved.

The invention discloses a GSC control method based on a resonance second order sliding mode. The control method is performed directly in a rest frame, power grid voltage phase estimation is omitted; complex negative sequence and harmonic component extraction is unnecessary, so that disintegration delay is avoided, and control speed is increased; adverse effect caused by power grid voltage imbalance and harmonic waves, so that stable output, low steady error state and good dynamic response features are achieved, and expected control effect is achieved; by the method, enhanced GSC control can be achieved under weak power grid voltage, and power output capacity of the converters during power grid faults is increased effectively.

A disclosed method of controlling a change of a transmission parameter including the steps of generating a control data unit which does not include a specification of the change timing for changing a parameter value of the transmission parameter for which processing all within a certain layer or sublayer is possible; transmitting the control data unit only in a first half of a transmission frame; and conducting transmission and/or reception, at a timing of a frame following a frame in which the control data unit was transmitted, based on the changed transmission parameter.

The invention provides a data communication method and device, and belongs to the technical field of communication. The method comprises the steps that the working frequency band of a first wireless communication module of at least two built-in wireless communication modules of second equipment is selected according to the frequency band supported by first equipment, each wireless communication module is a double-frequency wireless communication module, and the first wireless communication module works in an access point mode; the working frequency band of a second wireless communication module of at least two built-in wireless communication modules of the second equipment is selected according to the frequency band supported by routing equipment, and the second wireless communication module works in a site mode; data connection between the first wireless communication module and the second wireless communication module is established; and control data communication with the first equipment is performed through the first wireless communication module. Control delay can be reduced, and the communication quality can be enhanced by selecting the working frequency band of the built-in wireless communication modules of the second equipment.

The invention discloses a cascaded SVG serial-parallel cooperative communication controller, and aims to enhance the ability of a serial fiber channel between power units in resisting high-frequency signal interference, so as to facilitate fast detection and location of a failure fiber. The cascaded SVG serial-parallel cooperative communication controller is provided with a main controller and cascaded power units, wherein the main controller is provided with a main control plug-in and a fiber plug-in which are connected; the main control plug-in is connected with the cascaded power units through a serial fiber communication link; and the fiber plug-in is connected with the cascaded power units through a transceiving fiber link. Compared with the prior art, in the invention, by adopting serial and parallel transceiving links, the serial and parallel fiber communication links can be monitored quickly and visually, the ability of the serial fiber channel between the power units in resisting high-frequency signal interference is enhanced, the failure link and the power unit can be accurately judged and located, and the failure fiber is quickly detected and located; and meanwhile, thetime delay in control is little, the accuracy is high, and the fault tolerance is enhanced.

The invention discloses a current source grid-connecting converter control method, comprising: subtracting a given DC voltage reference value from a sampled DC side outputted voltage to obtain a voltage error signal; via the control of a first PI regulator, obtaining a DC current reference value; comparing the sampled DC side outputted current with a current reference value to obtain a current error signal controlled by a second PI regulator, wherein the DC side outputted current is controlled by the feedback resonance; subtracting the two outputs to obtain a modulation signal amplitude; using the phase angle theta of the sampled grid voltage and the detected grid voltage; multiplying the modulation signal amplitude by the orthogonal unit signals sin theta and -cos theta to obtain the modulation signals M[alpha] and M[beta] in a two-phase stationary coordinate system; using a notch filter to filter the third harmonic wave in the modulation signals M[alpha] and M[beta] to obtain new modulation signals M[alpha] and M[beta]; then respectively calculating the amplitude m and the phase angle information; and through the space vector modulation method, generating the driving signals. The method of the invention can effectively reduce the double frequency pulsation at the direct current output side and realize the sine wave of the network side current at the same time.

The embodiment of the invention discloses a control method and a portable terminal for a configurable peripheral device. The portable terminal comprises at least two subsystems and at least one configurable peripheral device, when obtaining a right of controlling the configurable peripheral device at first time, a first subsystem of the two subsystems initializes the configurable peripheral device and uses the configurable peripheral device according to distributive first configuration information. The method comprises the following steps of backing up the first configuration information, restoring configuration of the configurable peripheral device according to the first configuration information when the right of controlling the configurable peripheral device is switched from a second subsystem to the first subsystem so as to enable the first subsystem to use the configurable peripheral device. The control method and the portable terminal for the configurable peripheral device just need to implement initialization when the subsystem obtains the right of control at first time, configuration information backed up in the process of initialization is used for configuration of the configurable peripheral device in the following time, therefore control time delay of a system is shortened, and occupation of system resources is reduced.

The invention discloses a single-phase rectification analog control circuit. The circuit comprises a voltage outer loop circuit, an analog multiplier, a current inner loop circuit, a modulation wave reconstruction circuit, a voltage reference comparison circuit and a controlled power circuit. A sampling signal of an AC input voltage is multiplied by an analog multiplier circuit, and then a currentinstruction signal (forward operation) which has the same phase with the input voltage or has a phase difference of 180 degrees with the input voltage is outputted. A modulation wave signal outputtedby the current inner loop is superposed with the voltage outputted by a zero-crossing detection circuit, and a reconstructed modulation wave signal with a completely positive potential is generated within the turn-off time of an upper tube and a lower tube of one bridge arm. Compared with a digital control mode, the analog control mode has the advantages that the mode is small in control delay, high in control bandwidth, fast in response, high in anti-interference capability and good in adaptability to a power grid.

The invention discloses an overtaking control method and an overtaking control system based on an intelligent lamp post. The method comprises the steps of: acquiring a current position of a vehicle, predicting a driving route, and acquiring all lamp post base station information of the driving route of the vehicle; acquiring a front vehicle speed followed by the vehicle and a traffic flow averagespeed in front of the vehicle, and calculating an overtaking index; if the overtaking index is larger than an overtaking threshold value, judging that the vehicle needs to execute overtaking operation; acquiring a driving speed of a rear vehicle in an overtaking lane and a residual overtaking distance of the front vehicle in the current lane, and calculating an overtaking safety coefficient; if the overtaking safety coefficient is larger than the overtaking safety threshold value, judging that the vehicle can execute overtaking operation; and acquiring trunk and branch information in each traffic lane and calculating a driving route after overtaking. The overtaking control method and the overtaking control system solve the technical problem of how to control the overtaking time and the overtaking route of the vehicle.

The invention discloses a voice control method and device, which are used for solving the problem of long time delay in an existing voice control process. The method comprises the following steps: determining first text information with complete semantics according to a first voice signal; according to the first text information and second text information, controlling target equipment to be switched in the specified running states, wherein the second text information is obtained before the first text information, the second text information is used for controlling the target equipment to enter a first running state in the specified running states, and the second text information and the first text information have a contextual relationship.

The invention discloses a shoe virtual try-on method and device based on a WeChat applet. The method comprises the steps of: inputting an image into a lightweight convolutional neural network, recognizing a predefined target in the image and the pose information of the predefined target, and enabling the predefined target to be a left foot and a right foot; according to the pose information, calculating adjustment parameters required for projecting a 3D model to the predefined target in the image through a full-connection network of a fitting pnp algorithm, and adjusting the 3D model accordingto the adjustment parameters to obtain an adjusted model; and projecting the adjusted model into the image, and rendering to generate a try-on image. According to the scheme, a lighter technical scheme is provided for solving the problems of WeChat applet resource limitation and insufficient local computing power, virtual try-on computing work can be completed locally, and excessive network operation overhead does not need to be occupied.

A relative value notification method for notifying a relative value of a certain variable, from a transmitting side apparatus to a receiving side apparatus, includes the steps of: generating, at the transmitting side apparatus, a control signal indicating the relative value by using the number of values 1 or 0 in a plurality of bits to be transmitted during a predetermined period, and transmitting the generated control signal to the receiving side apparatus; and increasing/decreasing, at the receiving side apparatus, the certain variable by using the number of values 1 or 0 in the plurality of bits in the control signal received during the predetermined period.