19results about How to "Improve realizability" patented technology

The invention relates to the technical field of time-triggered network communication, in particular to a time-triggered Ethernet scheduling generation and synchronization system based on a hardware time axis construction engine. According to the system, a time axis structure consistent with global synchronization time is constructed on a switch side through hardware, sending time and a sending sequence of a time trigger frame configured by a user are directly mapped into a resource occupation relation on a time axis, and scheduling window mapping, conflict detection and window shaping are completed on a hardware level; therefore, a deterministic scheduling table is generated; through a double-table storage and time alignment switching mechanism, undisturbed updating and synchronous effectiveness of the dispatch table between the switch and the end system are realized. Compared with a traditional scheme of generating a scheduling table depending on a software algorithm, the method does not need a complex scheduling solution process, supports manual controllable configuration of time-triggered frame scheduling, and improves the certainty, autonomy and engineering realizability of the system.

The present application relates to a kind of plane five-pole closed-chain rehabilitation robot elimination modeling and force mapping control method, belong to rehabilitation robot control technical field.The method is aimed at the coupling of active joint and passive joint in plane five-pole closed-chain mechanism, control implementation difficulty under active joint coordinates and the problem that driving torque is difficult to accurately map as end force, establishes closed-chain position constraint equation, obtains velocity constraint relationship by derivation to constraint equation, under the nonsingular condition of passive joint constraint jacobian matrix, passive joint variable is explicitly eliminated, constraint consistent jacobian matrix is constructed, reduced dynamics equation under active joint coordinates is established, end force estimate is solved, and motor driving torque instruction is generated according to the end force estimate.The method is suitable for end impedance control, trajectory tracking control and rehabilitation training boost control of plane five-pole closed-chain rehabilitation robot.

The application discloses a control method and device of an inverter circuit and an inverter system, and belongs to the inverter field. The control method of the inverter circuit comprises the following steps: in the case that a grid performs a grid-connection and off-grid action, the minimum common-mode voltage between the neutral line and the protection ground line on the output side of the inverter is acquired; based on the number of point positions corresponding to the minimum common-mode voltage in the same power frequency cycle and the system delay time length, the target delay time length is determined; the system delay time length is determined based on at least one of the communication delay time length and the mechanical delay time length; after the target delay time length, the relay attraction instruction is issued; the relay attraction instruction is used for instructing the closing of the switching element. The control method of the inverter circuit can reduce the impact current generated in the moment of the closing of the contact, slow down the arc erosion of the relay, and prolong the service life of the relay.

This invention discloses a device for real-time analysis of multidimensional information of spatiotemporally mode-locked pulses using an all-fiber structure, belonging to the field of ultrafast optics technology. It includes an all-fiber spatiotemporally mode-locked laser platform, a raw pulse beam profile measurement module, an optical circulator, a sub-pulse beam profile measurement module, and a dispersive Fourier transform and real-time spectral information detection module. Based on the generalized multimode nonlinear Schrödinger equation, this invention constructs a theoretical model of the spatiotemporally mode-locked laser, explores the multidimensional parameter coupling mechanism during spatiotemporal mode-locking, clarifies the mapping relationship between modes and frequencies, and provides a theoretical basis and method for high-precision mode differentiation and multidimensional real-time information extraction. This invention aims to rationally design the parameters of each fiber grating according to the spectral width and temporal interval of the spatiotemporally mode-locked pulse, reflecting more sub-pulses while ensuring that the pulse temporal domains do not overlap, achieving high-precision spatial mode resolution, and maximizing pulse broadening to obtain high-resolution real-time spectral information.

This invention discloses a method for detecting internal leakage in hydraulic cylinders and its application in TBM support shoe hydraulic cylinders, comprising the following steps: S1, acquiring stroke data of the hydraulic cylinder within a predetermined time t1; S2, cleaning and segmenting the acquired hydraulic cylinder stroke data; S3, acquiring and filtering pressure data of the hydraulic cylinder in each specified time period; S4, performing wavelet decomposition and reconstruction on each group of filtered pressure data; S5, calculating the proportion of the energy of each order of high-frequency reconstructed signal in the total energy of the original pressure signal to determine whether internal leakage has occurred in the hydraulic cylinder. This invention completes the detection of internal leakage in TBM support shoe hydraulic cylinders using only pressure and stroke data, without the need to establish a complex physical model based on the geometric parameters of the TBM support shoe hydraulic cylinder, thus improving calculation speed and detection efficiency.

The invention belongs to the technical field of information security, and particularly relates to a random number security rapid evaluation method and device based on a neural network. According to the method, a random bit stream is mapped into a high-dimensional time state sequence by utilizing the high-speed nonlinear mapping capability of a photon reserve pool, and key time structure characteristics are highlighted by virtue of a time sequence mode attention mechanism, so that sensitive detection on random changes of a physical entropy source is realized. Compared with an existing method depending on a statistical test or a large-scale deep learning model, the method fully utilizes the high-speed calculation capability of the photon reserve pool neural network and the extraction capability of a time sequence mode attention mechanism on a key time structure, does not need complex model training, is light and efficient in calculation process, and is easy to implement. The method can be easily integrated with optical random number generator hardware, and is suitable for real-time minimum entropy evaluation of a high-speed physical entropy source.

This invention discloses a coordinated control method for a multi-module cascaded solid-state transformer, relating to the field of power electronics technology. The solid-state transformer includes multiple power conversion units, each employing a combined topology of front-end and rear-end conversion modules. Through the synergy of front-end voltage build-up control and rear-end optimal trajectory soft-start control, a phased and controllable soft-start strategy is constructed. First, the front-end actively builds up and equalizes the input buses at each stage, boosting and stabilizing the bus voltage within a safe operating range for startup, providing approximately constant input conditions for the rear-end stages. The rear-end stages employ an optimal trajectory control strategy, constraining the evolution paths of resonant current and capacitor voltage to achieve controlled power delivery, reducing problems such as overshoot, current surges, and excessive device stress during startup. Simultaneously, on the output side, phased control and a smooth transition mechanism ensure that the output voltage gradually builds up along a predetermined trajectory. After the system enters the steady-state operation stage, a post-stage steady-state optimization control method is proposed. The allocation coefficients of each module are used as unified optimization variables. The optimal allocation result is solved by a resource-aware distributed differential evolution algorithm. The allocation result is mapped to specific control inputs through the local controllers of each module, thereby optimizing the adaptive and coordinated operation mechanism of the post-stage system.

The disclosure provides an analysis and optimization method for focusing sensor optical parameters and silicon wafer film layer process parameters. The method comprises: constructing an error proxy model with focusing sensor optical parameters and silicon wafer film layer process parameters as inputs and highly process-dependent error as output; constructing a training data set to train the error proxy model until the model converges; according to a preset error target and parameter optimization range, using the error proxy model to globally optimize the focusing sensor optical parameters and the silicon wafer film layer process parameters, and obtaining an optimal parameter set meeting the preset error target. The disclosure establishes an error proxy model, which in principle accurately approximates the physical model of the focusing sensor and the multi-film layer structure of the silicon wafer. Through training and optimization, the evaluation accuracy of the error proxy model to the actual situation is improved, and the optimal parameter design is realized in combination with parameter optimization. The method does not rely on analytical calculation of the physical model, so that the parameter analysis and optimization process has higher realizability and faster calculation speed.

The utility model relates to the field of medical instruments, in particular to a medical guide wire flattening tool which comprises a flattening module and a cutting module, the flattening module comprises an upper pressing block and a lower pressing block, the upper pressing block is close to the lower pressing block through a flattening driving element, an upper pressing section is arranged at the bottom of the upper pressing block, and the width of the upper pressing section is consistent with that of a medical guide wire flattening section. The top of the lower pressing block is provided with a lower pressing section consistent with the upper pressing section in width, the upper pressing section and the lower pressing section are oppositely arranged, the cutting module comprises upper cutters, the two upper cutters are arranged on the two sides of the upper pressing section respectively, the upper cutters ascend and descend through a cutting driving element, and the cutting driving element and the upper pressing block ascend and descend synchronously. Combinations of various sizes are formed through extrusion cutting and flattening by means of cooperation of the upper cutter and the lower cutter in the flattening module, so that the problems of different elongation rates and different flattening sizes are solved, meanwhile, universality and realizability are improved, and product development is promoted.

The application relates to a dv / dt tolerance test circuit and method for a power device, which comprises a gate large-current driving circuit and a main circuit; the main circuit comprises MOS3, a device to be tested, a driving pulse generator V GS , a capacitor C2, resistors R G and R4, and a high-voltage direct-current voltage source V2; the gate large-current driving circuit is connected with the gate of MOS3, is used for controlling the fast turn-on and turn-off of MOS3, clamping the gate voltage of MOS3 at a safe value, and adjusting the size of dv / dt of the main circuit; at the moment of the turn-on of MOS3, one end of the capacitor C2 is forced to be grounded, so that the voltage across the capacitor C2 is rapidly applied to the device to be tested, and then a large dv / dt pulse voltage is generated. The application has higher reliability, the size of the dv / dt pulse voltage can be adjusted, the observation mode of indirect measurement has low precision requirement on the test equipment, the cost of the test equipment can be greatly reduced, and the realizability is high.

This invention discloses a method and system for personnel safety positioning in new energy power plants. The method includes: synchronously collecting raw location datasets of target personnel within the new energy power plant based on a preset positioning device / sensor; comprehensively analyzing the raw location data in the raw location dataset to determine the optimal estimated position of the target personnel at the current time point; comparing the optimal estimated position with a preset ideal position to determine the position deviation; if the position deviation is less than a preset position deviation threshold, the target personnel are currently within a safe positioning range and the optimal estimated position is output; through multimodal fusion positioning, the failure problem of single technology in environments such as obstruction, nighttime, and metal interference is overcome, and combined with area permissions, real-time alarms are achieved for personnel appearing in non-designated areas at non-designated times, thereby improving the safety index of staff.

The application discloses a low-tolerance and high-sensitivity large-view-field main-focus astronomical optical system, which comprises a main mirror, a correcting mirror A, a correcting mirror B, a correcting mirror C, a correcting mirror D, a correcting mirror E, a correcting mirror F and a focal plane; wherein light is reflected by the main mirror, and then sequentially passes through the correcting mirror A, the correcting mirror B, the correcting correcting mirror C, the correcting mirror D, the correcting mirror E and the correcting mirror F to reach the focal plane; the main mirror is a concave aspheric mirror, and the surface shape is a quadratic hyperboloid or a high-order aspheric surface. The application realizes low machining and assembling tolerance sensitivity while ensuring excellent large-view-field imaging of the main-focus optical system; through analyzing the distribution of aberration on each optical surface, the position and structure parameters of special glass materials and the optical power of optical elements are optimized, the average of the contribution of each optical surface aberration is realized, and thus the machining and assembling tolerance sensitivity is reduced.

The invention provides a distributed robust load frequency control method for a multi-region power system, and relates to the field of power control, and the method comprises the steps: building a multi-region LFC system model; converting the multi-region LFC system model into a low-dimensional error system through tree transformation; performing robust consistency analysis based on a low-dimensional error system, and proposing a stability criterion meeting the performance; designing a distributed robust controller based on the stability criterion, solving the gain of the controller through a linear matrix inequality, and achieving the control of the distributed robust load frequency through a solving result. The technical scheme of the invention is suitable for a power system with three or more regions, and the communication topology is a switching structure and comprises full communication, partial communication and chained topology.

The application relates to the technical field of unmanned aerial vehicle flight data processing based on cloud computing, in particular to an unmanned aerial vehicle flight data processing method and system based on cloud computing, which comprises the following steps: receiving high-precision event data packages uploaded by an unmanned aerial vehicle at a data entrance of a cloud platform, and temporarily storing the high-precision event data packages; performing space-time correlation judgment on the temporarily stored high-precision event data packages to obtain a space-time correlation judgment result, so as to identify events with a space-time proximity relationship, wherein the space-time correlation judgment is performed under the constraints of a preset time window and a preset geographical range; after the events with the space-time proximity relationship are identified, logically binding the high-precision event data packages with the space-time proximity relationship according to the space-time correlation judgment result, forming an event group, and generating a group identifier for the event group; and routing the event group together with the group identifier to an event analysis processing channel. The above can help improve fault analysis efficiency.

The application provides a water network space optimization method and device, wherein, based on each space optimization measure, an initial water network space is optimized to obtain several optimized water network spaces; each optimized water network space is subjected to implementation feasibility evaluation to obtain implementation feasibility evaluation results of each optimized water network space; a space optimization scheme of the initial water network space is determined based on the implementation feasibility evaluation results of each optimized water network space; and based on the space optimization scheme, the initial water network space is optimized to obtain a target water network space. The above method can improve the implementation feasibility and optimization effect of water network space optimization.

This invention discloses a method and system for Wi-Fi backscatter covert communication utilizing the FCS (Focus Cross Section) characteristic, belonging to the field of wireless communication. The implementation method of this invention is as follows: the transmitting tag encodes covert information into location information, and based on the location information containing the covert information encoding, generates an intentional error during the backscattering of the Wi-Fi signal. After demodulating the Wi-Fi backscattered signal, the receiving end uses the FCS characteristic to determine the location of the intentional error, and demodulates the covert information according to the covert information encoding, thus realizing Wi-Fi backscatter covert communication using the FCS characteristic. By encoding the covert information into intentional error location information at the transmitting end, the amount of covert information carried in the Wi-Fi data packet containing the covert information is increased, thereby improving the throughput of covert communication. This invention also discloses a system for implementing the aforementioned method for Wi-Fi backscatter covert communication utilizing the FCS characteristic.

The invention relates to the technical field of aircraft design, in particular to an aircraft overall scheme generative design method based on PILO-GAN, and the method comprises the steps: converting an unstructured natural language demand into structured design parameters; then constructing a PILO-GAN network, generating initial design parameters by taking structured parameters as conditional input and combining with random noise, embedding aircraft design empirical criterion constraints, and driving physical optimization based on multidisciplinary performance evaluation; performing multidisciplinary physical performance verification on the initial design parameters to obtain quantitative performance indexes; constructing a gradient propagation path by adopting a REINFORCE algorithm, and feeding back a performance index gradient to the generator to realize parameter updating; and finally, dynamically adjusting the weight of the loss item of the constraint and physical optimization, and carrying out iterative optimization until a preset requirement is met. Through a physical closed-loop optimization mechanism, end-to-end intelligent generation of feasible schemes from demands to engineering is realized, and the physical consistency and engineering credibility of the design scheme are remarkably improved.

The invention provides a distributed radar angle estimation method and device, and the method comprises the steps: obtaining more than two radar signals, and carrying out the independent processing of the radar signals, and obtaining corresponding first data; acquiring all first data, and performing association processing in a centralized manner to obtain second data; estimating the angle of each radar based on the second data to obtain a corresponding initial angle estimation value; and constructing a distributed radar observation model based on the second data and all the initial angle estimation values, and performing iterative processing to obtain a final angle estimation value. Based on a target-driven self-calibration mechanism, high-precision angle estimation of a distributed radar system is realized without precise time and phase synchronization, high-precision time and phase synchronization of a plurality of radar nodes is not needed, and the method does not depend on additional synchronization hardware or a complex calibration process. And phase alignment among the radar nodes can be realized only through an algorithm, so that the design complexity and cost of the system are remarkably reduced, and the engineering realizability is improved.

The invention relates to the technical field of power electronics and direct-current power transmission, in particular to a VSC-HVDC direct-current capacitor design method considering load uncertainty, which comprises the following steps of: 1, establishing a state space model; step 2, establishing a model containing uncertain variables; step 3, stability criterion; and step 4, direct current capacitor algorithm design: by introducing load uncertainty modeling, constructing a computable robust stability criterion and combining with a systematic parameter search method, the direct current capacitor design is expanded from a fixed operation point to a load change interval, and compared with the prior art, the direct current capacitor algorithm design method has the advantages that the design efficiency is improved, and the cost is reduced. The method has obvious advantages in the aspects of applicability, calculation feasibility and engineering guidance significance, the direct current capacitor design is expanded from a fixed operation point to a load change interval by introducing load uncertainty modeling, constructing a computable robust stability criterion and combining a systematic parameter search method, and compared with the prior art, the method has the advantages that the method is simple and convenient to operate, and the cost is low. The method has obvious advantages in the aspects of applicability, calculation feasibility and engineering guiding significance.