31 results about "Serial system" patented technology

The invention relates to an MMC converter station running state fuzzy comprehensive evaluating method and belongs to the technical field of electric power transmission.According to the MMC converter station running state fuzzy comprehensive evaluating method, the method aims at carrying out statistic operation on direct-current bus voltage information with a Tsallis wavelet packet energy entropy algorithm, and taking the ratio of the Tsallis wavelet packet energy entropy peak value generated in a transient state fault to the Tsallis wavelet packet energy entropy peak value generated when the fault does not occur as an evaluating factor.The method comprises the steps that voltage signals of a direct-current bus are collected, wherein the sampling frequency is 1024 Hz; level decomposition is carried out on the voltage signals of the direct-current bus with a discrete wavelet packet, a signal matrix is restructured with the node coefficients of the discrete wavelet packet, and finally the energy entropy of the Tsallis entropy wavelet packet is obtained.The evaluating method can be proposed with the combination of reverse nonextensive entropy, healthy evaluation on the MMC running state can be achieved, and the study course of the energy transfer process of an MMC-HVDC alternating-current and direct-current parallel serial system is promoted.The influence severity degree of the MMC converter station by alternating-current line faults or disturbance is accurately reflected by analyzing changes of all electric information in the MMC converter station, and then the healthy evaluation on the MMC running state is achieved.

The invention discloses a parallel-serial capillary tube varying system inherent frequency vehicle shock absorber running method. A capillary tube parallel damping association segment and a capillary tube serial system inherent frequency association segment are sequentially connected to a pipeline between an upper oil bin oil conveying opening and a lower oil bin oil conveying opening from top to bottom; the capillary tube parallel damping association segment comprises four parallel capillary tubes, and each capillary tube is in serial connection with an electromagnetic valve and controls the electromagnetic valve to work; the capillary tube serial system inherent frequency association segment comprises four serial capillary tubes; the four capillary tubes are all in parallel connection with an electromagnetic valve and controls the valve to work. The diameter of the minimum capillary tube of the frequency adjusting segment is far larger than the diameter of the capillary tube of the resistance adjusting segment; in the matrix type work state table, according to the condition, the configuration value Smn of the electromagnetic valve in the frequency adjusting segment is selected, and through the manner of changing the mass, the problem that the inherent frequency of an automobile hydraulic shock absorber system cannot be adjusted or the adjustable range is very small is solved.

The invention relates to a load flow calculation method for an AC/DC parallel serial system based on an improved LM algorithm. The method comprises the following steps: (1) acquiring a load flow calculation equation set F(X) of the AC/DC parallel serial system, setting an initial iteration point and an initial self-adaption factor, wherein iteration K=1; (2) acquiring a jacobian matrix of the iteration at k time according to F(x); (3) gaining a damping factor of the iteration at k time according to the self-adaption factor of the iteration at k time, thereby acquiring an iterative step length and an approximate iterative step length of the iteration at k time; (4) calculating a choice factor of the iteration at k time and adjusting the iteration point and the self-adaption factor according to the choice factor, thereby acquiring the iteration point at k+1 time and the self-adaption factor for the iteration at k+1 time; and (5) judging if an iteration ending condition is met, if so, acquiring the load flow calculation data of the AC/DC parallel serial system, otherwise, assigning k=k+1 and returning to the step (2). Compared with the prior art, the method provided by the invention has excellent convergence character.

An electronic system includes a serial system bus interface having a root complex and an end point, a command bus and a data bus coupled to the serial system bus interface, a memory device coupled to the data bus, and a direct memory access (DMA) controller coupled to both the command bus and the data bus to directly access the memory device in response to request commands which are transmitted from the root complex to the end point. The DMA controller includes a command queue in which the request commands stand by.

The ammonium chloride producing process in a serial system includes the following steps: feeding cold ammonia mother liquid into two cooling and separating crystallizers to separate ammonium chloride; densifying the crystal slurry of the first cooling and separating crystallizer, solid-liquid separation and drying to obtain refined ammonium chloride; feeding the clear liquid from washing salt andtwo cooling and separating crystallizers into two salt-separating crystallizers, densifying crystal slurry from the two salt-separating crystallizers in a second densifier, mixing the densified crystal slurry with cold ammonia in the second cooling and separating crystallizer; mixing, washing and densifying the crystal slurry from the crystallizer and the mother liquid from the first cooling and separating crystallizer in a third-densifier.

The invention discloses a space-time hierarchical and operation-optimized method and system for the serial-parallel, cascade pumping station water delivery system. The method includes the steps that establish a complete set of space-time hierarchical and operation-optimized theoretical system for the serial-parallel, cascade pumping station water delivery system. It establishes successively in the space dimension, single level pumping station, serial system, parallel system operation-optimized model system; in the three-model system, it establishes successively the three layers of operation-optimized model: system operation efficiency, daily, mid-term and long-term, according to different optimization targets in the time dimension and considering the delays by the startups and shutdowns of the pumping station as well as other factors. It figures up a multi-layered optimized operation plan, and realizes the step-by-step optimized decomposition of the operation plan in the time (mid, long-term, daily, hourly) dimension and space (parallel system, serial system, single-level pumping station) dimension, including the distribution of water within different time periods, the optimization plan for the staircase hydropower, the optimized operation plan for the internal units of the pumping station. This method solves the tough problem of figuring up an optimized operation for the serial-parallel cascade pumping station water delivery system, due to the complications and dynamics of control and operations.

The invention discloses an electromechanical device equipment operation reliability degree analyzing method. The analyzing method is used for describing reliability degree relation between a system and subsystems/subsystems/equipment/parts, the relation between the system and all the subsystems is determined, then different reliability degree analyzing algorithms are adopted according to differentconnection relations, wherein all the subsystems are independent of one another; according to the necessary but not sufficient condition of normal system operation, at least one subsystem operates normally to form difference between the serial system and the parallel system. The lightweight reliability degree analyzing system and the simplified reliability degree analyzing method are adopted; lightweight reliability degree analysis is applied to common electromechanical device installation and electromechanical device operating maintenance projects.

The embodiment of the invention discloses a serial communication system, and the system comprises a master device and a plurality of slave devices; the slave devices comprise first slave devices and second slave devices, and the first slave devices and the second slave devices are installed according to random positions, wherein the master device is in communication connection with each first slave device through a daisy chain type serial bus, and the daisy chain type serial bus performs high-speed data transmission in a serial differential transmission mode; wherein the master device and thesecond slave devices are in communication connection through a universal serial bus, and the universal serial bus performs low-speed data transmission in a polling mode. According to the technical scheme of the embodiment of the invention, the bus can be configured according to the configuration requirement of the application scene of the serial system on the bus on the premise of not additionallyincreasing the hardware cost, so that the flexibility of bus configuration in the serial communication system is improved.

A serial system and method for blowing antifuses are disclosed. One embodiment of antifuse system includes a plurality of latch devices connected in series from input to output. The system also includes a plurality of antifuses. The antifuses are configured to receive an output signal from a corresponding one of the latch devices. The plurality of latch devices includes a plurality of D flip-flops connected in series. Each of the D flip-flops is configured to receive an output signal from an immediately previous D flip-flop in the serial data flow and to provide an output signal to an immediately subsequent D flip-flop in the flow. In addition, the serial system provides self-detective antifuses, thus creating reliable electrical paths while saving antifuse blowing current resources and time.

The invention discloses an inertial navigation positioning measurement full-energy gear train system which comprises center rod fine adjustment and deadlocking mechanisms, a multi-pipe diameter serialgear train supporting arm system, an inertial navigation positioning instrument suspension shock absorption system, an inertial navigation positioning instrument multi-pipe diameter gear train and asupporting arm serial system; the inertial navigation positioning instrument suspension shock absorption system is installed at the top end of an inertia instrument rigid skeleton to provide rigid supporting and soft connection when an inertial navigation positioning instrument performs measurement and running; the two ends of the inertia instrument rigid skeleton are provided with bearing straight rails through adapter flanges respectively; each bearing straight rail is provided with a linear bearing; the position, close to the end part, of each bearing straight rail is provided with the corresponding fine adjustment and deadlocking mechanism; and the fine adjustment and deadlocking mechanisms are connected with the linear bearings through fine adjustment springs respectively. By adoptingthe inertial navigation positioning measurement full-energy gear train system provided by the invention, the center rod fine adjustment and deadlocking mechanisms provide the spring pressure, and thespring pressure is converted to the adhesion force of the gear train to the pipe wall and the friction force of a tread to the pipe wall when the gear train advances, so that a gyroscope gear train is ensured not to slip and lose rotation, and the measurement accuracy of an inertial navigation gyroscope is ensured.

An intelligent light-supplementing LED system for message signs and traffic lights includes multiple optical lenses and LED units which are respectively provided behind each of the optical lens. The LED units include at least two LEDs connected in parallel; multiple LED units are connected in parallel to form a parallel system unit, or multiple LED units are connected in series to form a serial system unit. The parallel system unit is connected to a constant current power supply or a constant current circuit. The serial system unit is connected to a constant current power supply, a constant-voltage DC source, or a constant current circuit. So if an LED fails to light up, the total current that passes through the LED unit will have no or little change.

Provided are a wiring reconstruction method and a terminal used in the method, by which a system adopting a parallel system using a large number of wires for connecting a controlling device and a plurality of controlled device can be changed to a serial system using a small number of wires. According to a first wiring reconstruction method, in a transmission wherein a controlling device controls a plurality of controlled device independently using different signal lines, the controlling device is provided with a master station which performs conversion between a parallel signal and a serial signal. Any of the plurality of signal lines extending from the controlling device to the plurality of controlled device is diverted to a common data signal line extending from the master station. A slave station terminal provided with a transmission function to the master station is arranged at a connection portion between an input device and/or an output device of the controlled device and the common data signal line.

The invention discloses a battery online impedance spectroscopy detection system and method based on digital modules. The system comprises digital modules, a central controller, a current sampling module and an inductor L. The M (>=2) digital modules are sequentially connected in series to form a battery string system, the inductor L is connected in series in the battery string system, and the serial system is connected between a positive direct current bus Bus + and a negative direct current bus Bus-. The current sampling module is connected between the inductor L and the controller, and is used for collecting the real-time current flowing through the inductor L, converting the real-time current into a digital signal through an ADC (Analog to Digital Converter) and transmitting the digital signal into the controller. The controller has a level signal output function, and outputs control signals to the digital modules through an input/output port IO. According to the invention, periodic signal excitation is carried out on the battery string, and then real-time voltage and current sampling is carried out to detect the response of a tested equivalent battery to the excitation. Further, the impedance spectrum of the equivalent battery can be calculated.