14 results about "Array performance" patented technology

The invention relates to the technical field of array antennas, and discloses a common-caliber layout-based ultra-wideband array antenna, which comprises a low-frequency unit and a high-frequency unit which are arranged based on a common caliber, and is characterized in that the working frequency of the low-frequency unit covers an fmin-f0 frequency band, and the working frequency of the high-frequency unit covers an f0-fmax frequency band. The low-frequency unit is a broadband dual-polarized antenna, a uniform tight coupling array distributed at equal intervals is formed by adopting a tight coupling principle, and the unit interval is calculated based on a grating lobe suppression condition at the frequency f0. The high-frequency unit is a miniaturized broadband dual-polarized antenna and adopts a sparse array form; the initial unit spacing and the unit number of the sparse array are calculated based on the grating lobe suppression condition at the highest frequency f2 of the f1-f2 frequency band with the side lobe requirement between the f0-fmax frequency bands. The ultra-wideband array antenna gives consideration to full-band array performance, can provide sufficient space for active circuit arrangement, and effectively reduces power consumption and cost.

The invention provides a sub-array optimal distribution method and system based on a quantum antelope optimizer, and belongs to the field of array signal processing. The invention aims to solve the problem of inaccurate estimation of distributed array performance attenuation and direction of arrival due to reduction of the number of snapshots and change of interference noise under the conditions of small sampling snapshots and impact noise. According to the method, the array structure is optimized under the impact noise condition, received signals are processed by constructing an infinite norm weighted fraction low-order covariance matrix, and the method is more suitable for the environment where the number of snapshots is reduced and the impact noise is severe; a quantum optimization mechanism is introduced, and the performance and search efficiency of an original algorithm in the distributed array research direction are improved based on an evolution strategy of a quantum rotation angle and a quantum rotation door; according to the method, the direction finding accuracy of the distributed array system can be improved, and the situation that the array performance influence factors in the actual direction finding application are not considered sufficiently and the performance improvement is not large due to the fact that the directional diagram of the array serves as the optimization target can be effectively avoided.

The application provides an array performance quantification analysis method and system for sea wave direction spectrum estimation, and relates to the technical field of array performance quantification analysis. The method comprises the following steps: determining the analytical upper limit of the array through wave number spectrum window calculation; determining the information utilization rate of the array by comparing the equivalent measurement point number and the real measurement point number of the array; obtaining the wave number sidelobe level by calculating the ratio of the maximum sidelobe peak value to the main lobe peak value in the wave number spectrum window, and then determining the energy leakage level of the array; determining the observation ability of the array by calculating the normalized average nearest neighbor distance between each measurement point of the array; obtaining the main lobe concentration degree by calculating the angle deviation between the direction of the vector and the direction of the center line of the correlation matrix of the array, and then determining the advantages and disadvantages of the main lobe shape of the array; and comprehensively evaluating the quantitative evaluation results of the above five dimensions to form the quantitative evaluation of the comprehensive performance of the array. The application is suitable for arrays with any measurement point number, and the performance pre-evaluation can be completed before the array is deployed.

The application discloses a MUSIC damage positioning method based on self-excitation self-adaptive correction, which is used for improving algorithm positioning precision; in complex structure application, the structure has high anisotropy, in addition to the influence of sensor space layout error on array performance, the MUSIC damage positioning method has low precision. The array itself excitation array element is used as a correction source in the application, so that the additional correction source is avoided, the excitation array element has multiple directions relative to the sensor array, the actual time delay of each sensor array element in different directions is measured by receiving the self-excitation signal of the correction source; the distance from the self-excitation correction source to each sensor array element and the signal propagation speed are used to obtain the theoretical time delay from the self-excitation correction source to each sensor array element, and the array time delay error under the measurement of the self-excitation source is obtained by subtracting the actual time delay from the theoretical time delay; finally, in the search process, the time delay error of the corresponding self-excitation correction source direction is selected adaptively according to the search angle to correct the steering vector, so that the damage positioning precision can be improved.

The application discloses a kind of coordinated control methods of flywheel energy storage array, it is related to flywheel control technical field, the method includes: obtaining data;Wherein, the data includes: power grid frequency deviation and the state data of each flywheel;Total power demand is calculated based on the power grid frequency deviation;Available power of each flywheel is calculated based on the flywheel state data;The distribution power of each flywheel is optimized by model predictive control;Controller sends distribution power to each flywheel, and flywheel adjusts power by converter.By the processing scheme of the present application, by introducing dynamic health assessment and model predictive control, power distribution can be optimized, and array performance can be improved.

Systems and methods are provided for performing a reduced precision number multiply-accumulate operation in a systolic array. Each row of the systolic array may receive a reduced input from a respective reducer. The reduced input may include reduced input data elements and / or reduced weights. The systolic array may lack support for an input having a first bit length, and the reducer may reduce a bit length of a given input from the first bit length to a shorter second bit length and provide the reduced input to the array. To reduce the bit length, the reducer may reduce the number of trailing bits of the input. In addition, the systolic array may receive a reduced and rounded input. The systolic array may propagate the reduced input through processing elements in the systolic array. Each processing element may include a multiplier and / or an adder to perform an arithmetic operation based on the reduced input.

The invention provides a sound source positioning sensor mounting module for pipeline leakage monitoring. The sound source positioning sensor mounting module comprises an array main body, an integrated array plate, an array cover plate and a fastener. The upper side of the array main body is provided with a first annular body with a limiting hole and a second annular body and a first threaded hole, and the lower side of the array main body is provided with a mounting module. The integrated array plate is in a disc shape, array element microphones and cameras in a multi-arm spiral array are arranged on the integrated array plate, and positioning blocks are arranged on the outer side of the integrated array plate. The array cover plate is provided with corresponding array element holes and camera shooting holes, and the lower side of the array cover plate is provided with a third annular body with a third threaded hole. During assembly, the integrated array plate is positioned in the clamping groove of the array main body through the matching of the positioning block and the limiting hole, and the array cover plate is fixed with the array main body through a fastener. The device is compact in structure and reliable in connection, signal acquisition quality can be effectively guaranteed, array performance can be flexibly adjusted by replacing the array plate, acoustic and visual signals are combined, and rapid and accurate positioning of pipeline leakage points is achieved.

The invention discloses a non-volatile computing storage array based on a 1FeFET-1C structure and a parasitic capacitance compensation method, and aims to solve the problems of array output linearity reduction and sensing margin reduction caused by mode dependence on capacitance change in the prior art and realize accurate evaluation and optimization of large-scale CiM array performance. The compensation method comprises the steps that a FeFET device model containing a GAA nanowire channel and fully surrounding a ferroelectric layer is established on a TCAD platform, and equivalent fixed charges are introduced into the interface of a semiconductor and the ferroelectric layer to simulate the polarization state of a low-threshold LVT and the polarization state of a high-threshold HVT respectively; in different polarization states, extracting gate-source capacitance and gate-drain stray capacitance of the FeFET device and interconnection coupling capacitance between a bit line and a word line; the device-level parasitic parameters are integrated into an array simulation model comprising a 1FeFET-1C memory cell to evaluate the influence of parasitic characteristics on the linearity and sensing margin of the array output voltage.

Methods and apparatuses for improving storage array performance by using time-series characteristics on both a local storage area (extent-level, or track-level) basis as well as global, system level are disclosed. The time series characteristics are input to an aging model where optimal aging times, on a per-extent basis, are forecasted according to the local and global characteristics. The aging model may be a multivariate time-series model. Incoming write requests may be destaged from cache memory according to the forecasted optimal aging times for the storage extents.

Disclosed methods and apparatuses embody techniques for advantageous packing and deployment of an inflatable net for use as a randomized sparse array offering gain and beam-count equivalent with a conventional phased-array of the same number of antenna elements and near-equivalent spatial discrimination (beam definition) as compared with a conventional phased array of the same effective diameter. Operation of the deployed net as a randomized sparse array greatly relaxes the mechanical tolerances associated with deployment, such that array performance does not depend on achieving precise or predetermined spatial relationships among or between elements in the array. Additionally, the voids inherent in the net structure offer greatly reduced overall mass and volume, making practical the stowage and launch of inflatable nets that deploy into very large arrays.

The utility model discloses an area array detection system based on a through-the-wall radar, which comprises a radar master controller and an antenna area array, the antenna area array comprises four transmitting antennas and six receiving antennas, the four transmitting antennas and the six receiving antennas are respectively and electrically connected with the radar master controller, the four transmitting antennas are respectively positioned at four vertexes of a rectangular surface, and the six receiving antennas are respectively positioned at the four vertexes of the rectangular surface. Two long edges of the rectangular surface are respectively provided with two receiving antennas, two short edges of the rectangular surface are respectively provided with one receiving antenna, and the distance between the transmitting antenna and the adjacent receiving antenna is equal to the distance between the adjacent receiving antennas. According to the detection system disclosed by the utility model, a step frequency system is adopted, the helical antennas are arranged in a central symmetry manner to form an area array, and the spacing of each array element is accurately calculated, so that the Nyquist sampling theorem is met, and an interference region is small enough as much as possible, thereby avoiding the influence of grating lobes on the array performance.

The application discloses a sparse MIMO array design method based on genetic optimization, which is used for realizing high-resolution virtual array construction under the condition of reducing the number of transmitting and receiving array elements, and comprises the following steps: firstly, multiple geometric subarray structure constraints are constructed according to array performance evaluation indexes; then, population and system parameter settings are initialized; secondly, a multi-objective constraint model is established with the optimization target of maximizing fitness; subsequently, the model is solved by using an improved genetic algorithm until the algorithm converges, and finally, a sparse MIMO array structure satisfying the performance optimization and the quantity constraint is obtained. Compared with the prior art, the application enhances the controllability of the array structure by introducing the geometric subarray constraint, and guarantees the expected aperture form of the virtual array; the improved genetic algorithm can realize global search under the condition of fixed antenna number, and avoids local optimization; compared with the traditional method, the application has good engineering implementation and algorithm universality.

The invention discloses an angle measurement method for optimizing a distributed array long baseline based on an NBLFM signal, and the method comprises the steps: obtaining a synthetic antenna directional diagram through the NBLFM signal and a distributed antenna array structure, reducing the side lobe of the synthetic directional diagram to the greatest extent through constructing an optimization function related to the length of the directional diagram and the baseline, and determining the optimal long baseline. And performing beam scanning on the echo signal, and traversing the signal-to-noise ratio to obtain a group of beam scanning measurement angles corresponding to the signal-to-noise ratio. According to the invention, more NBLFM signals used in practice are selected to directly optimize the baseline length, the generation and processing of the NBLFM signals are relatively simple, the design of required hardware is easier, and the cost is lower. The synthetic antenna pattern is simplified, the influence of the baseline length on the array performance is well utilized in combination with the optimization function, and the length of the optimal baseline can be simply and efficiently determined.

The invention discloses a coordination control method for a flywheel energy storage array, and relates to the technical field of flywheel control, and the method comprises the steps: obtaining data; wherein the data comprises power grid frequency deviation and state data of each flywheel; calculating a total power demand based on the power grid frequency deviation; calculating available power of each flywheel based on the flywheel state data; the distribution power of each flywheel is optimized through model prediction control; the controller sends the distribution power to each flywheel, and the flywheels adjust the power through the converters. According to the processing scheme, dynamic health assessment and model prediction control are introduced, so that power distribution can be optimized, and array performance can be improved.