32results about How to "Meet real-time control requirements" patented technology

The invention discloses a parallel control method of a three-phase two-level inverter with isolation transformers. The parallel control method comprises the steps of: (1) connecting each auxiliary inverter with one isolation transformer, to be specific, modulating direct-current into alternating-current power with certain amplitude and frequency by the regulation of the auxiliary inverters, and then carrying out voltage reduction and filtering on the alternating-current by the isolation transformers to supply the power to alternating-current auxiliary loads on a motor train unit for use; (2) sampling the output line current of the auxiliary inverters and the liner voltage of secondary sides of the isolation transformers, calculating active power and passive power under the instantaneous output of the auxiliary inverters and carrying out filtering treatment; (3) generating given voltage amplitude signals and given frequency signals for current-sharing control of the auxiliary inverters by using a drooping characteristic algorithm; and (4) enabling the auxiliary inverters to output three-phase alternating-current power with certain voltage amplitude and frequency by means of voltage closed-loop control and frequency closed-loop control. The parallel control method has the advantages of simple principle, easiness for implementation, capabilities of improving antijamming capability of the system and greatly enhancing system reliability, and simultaneously reducing system hardware cost, and the like.

The invention discloses a coordination control method for a micro-grid system. The coordination control method of the micro-grid system comprises the steps of: (1) performing program initialization of a coordination control system; (2) processing a digital switching value, and carrying out information interaction with a micro-grid energy management system, a liquid crystal display module and an in-place controller; (3) processing data of obtained information; (4) judging the working condition of the micro-grid, and calling a corresponding control program module based on the type of the working condition of the micro-grid; and (5) calculating the power command value of each running device, sending a signal to each running device of the micro-grid after the safety economic index satisfying with each running device is confirmed and adjusting the running state of the system by the control program module. The coordination control method for the micro-grid system realizes coordination control on the micro-grid system, and ensures safe and steady operation of the micro-grid. By adopting the modular software design and shortening the code of each software module, the coordination control method for the micro-grid system can remove software errors to the maximum extent and therefore greatly improve reliability of the software.

The invention discloses a control method for high voltage electricity safety protection of a passenger vehicle. The control method comprises the following working processes of: power-on self-test, high voltage switch-on control, high voltage circuit state detection and high voltage electricity switch-off control; and a high voltage circuit is detected and controlled. In the mode, high voltage faults such as a high voltage circuit insulation fault, a high voltage interlocking fault, a grounding fault, a pre-charging fault and the like can be monitored by the control method; and the control method has the advantages that: working stability, accuracy and reliability are achieved, dynamic response speed is high, and the requirement of real-time control of a new energy passenger vehicle is well met.

The invention belongs to the technical field of wireless communication, and discloses a suspect identification and positioning tracking system and method based on a 5G wireless network. The overall structure of the suspect identification and positioning tracking system based on the 5G wireless network comprises a sensing layer, a transmission layer, a computing storage resource layer and an application layer. Based on a 5G wireless high-speed network, real-time return of monitoring video pictures is realized, and suspect recognition and positioning tracking are completed by combining face recognition and binocular vision ranging technologies; high-definition and controllable wireless binocular vision cameras are densely deployed in an urban area, the cameras upload video pictures to nearest mobile edge nodes through a 5G wireless high-speed network, and finally individual suspects are recognized, positioned and tracked. Experiments show that the 5G wireless network time delay providedby the invention is less than 35ms, the calculation time delay is 100ms, the total time delay is equal to 2*network time delay+calculation time delay, and the total time delay is less than 200ms.

The invention belongs to the field of plasma heating, and particularly relates to a novel fast rotating high power electron cyclotron wave emitting antenna. The antenna comprises a vacuum seal box, anouter blind plate connected with the vacuum seal box in a sealing manner, four vacuum seal windows on the outer blind plate, and two reflective plane mirrors and four reflective focus mirrors placedinside the vacuum seal box, wherein the four reflective focus mirrors are divided into an upper group and a lower group. A plane mirror rotating mechanism capable of making the reflective plane mirrors rotate is arranged inside the vacuum seal box. A rotation driving mechanism is arranged on the outer blind plate outside the vacuum seal box. The annular and polar injection angles of microwave canbe remotely controlled at the same time. The angle control is reliable and smooth, the positioning accuracy is high, and the polar rotation is fast. The response speed of polar angle rotation can meetthe real-time control requirement during plasma discharge. A hardware basis is provided for realizing real-time feedback control of the new classic tearing mode.

The related protocol stack oriented to wireless industrial control network comprises: a physical layer and an application layers both built as OSI, a data chain layer included two layers. Wherein, the lower sub-layer of data chain layer uses traditional CSMA protocol as the control protocol for wireless channel access, and the upper sub-layer uses token-based CSMA protocol to build token logic loop in connected wireless distributed system and control the lower CSMA protocol; there is a recovery mechanism and a logic expansion/contraction mechanism for token logic loop.

A turbogenerator main throttle valve opening predication control method based on a delaying observer is provided. The method comprises the following four steps: step 1: analyzing and modeling a turbogenerator main throttle valve opening control system; step 2: designing turbogenerator main throttle valve opening predication control; step 3: designing the delaying observer; and step 4: finishing the design. Aiming at a main throttle valve opening control system model, a control principle with a closed analytical solution is designed, and the output delaying observer is designed to correct a measured signal, so that the overall stability of a closed loop control system is guaranteed under the time varying delaying condition; meanwhile, the rapid and accurate tracking of a pre-set track by a power angle of a turbogenerator is realized.

The invention provides a steam turbine generator main steam valve opening degree prediction control method based on a non-linear interference observer. The method comprises the four major steps that 1, a steam turbine generator main steam valve opening degree control system carries out analysis and modeling; 2, the steam turbine generator main steam valve opening degree prediction control design is carried out; 3, the non-linear interference observer is designed; 4, the design is completed. The method aims at a main steam valve opening degree control system model, a control rule with the closed type analytical solution is designed, and then, the non-linear interference observer is designed for controlling the interference for compensation, so that the global stability of the closed loop control system is ensured under the condition with higher input interference, and meanwhile, the fast and precise tracking of a steam turbine generator power angle on the preset tracks is realized.

The invention discloses a linear active disturbance rejection control modeling method for axial power distribution of a large pressurized water reactor, and belongs to the field of electric digital data processing. The method comprises the steps: firstly, performing model transformation by adopting an original nonlinear model to obtain a second-order nonlinear model for active disturbance rejection controller design; designing a corresponding LESO, and exporting LESO gain parameters by adopting a pole assignment method; determining an LESO bandwidth parameter omega o based on the second-ordermodel time scale and the total disturbance term time scale; determining a PD bandwidth omega c range by adopting the maximum possible deviation and the maximum allowable action speed of the executingmechanism, and setting a proportional gain and a differential gain based on the omega c; and setting an LESO bandwidth parameter omega o and a PD controller bandwidth omega c, and determining that thereactor power control system completes active disturbance rejection control. According to the method, the problems of nonlinearity, parameter uncertainty and external disturbance faced by the axial power distribution control design of the large pressurized water reactor are solved, and the real-time control requirement is met.

A polyvinyl chloride polymerization production process real-time measurement control system relates to a polyvinyl chloride polymerization measurement control system, the system is installed on a polymerization kettle and is provided with a temperature transmitter (4), a pressure transmitter (5) and a flow transmitter (6), the field transmitters transmit collected information to a lower computer (2), the lower computer (2) is connected with an execution mechanism and an upper computer (1), the upper computer (1) performs signal transmission with the soft measurement model; the sensor is connected with the lower computer (2), the actuating mechanism regulating valve (3) is also connected with the lower computer (2), the lower computer (2) is connected with the upper computer (1), and the measurement model is communicated with the upper computer (1) in a communication mode; the soft measurement model predicts the conversion rate to complete real-time control; and the actuating mechanism is a regulating valve (3) and is connected with a switch for controlling the water outlet of the cold water tank (hot water tank) according to the temperature of the jacket of the polymerization kettle so as to control the condition of the PVC resin. According to the method, online measurement is accurately and efficiently realized, the prediction precision of the PVC polymerization conversion rate is remarkably improved, and the real-time control requirement is met.