53 results about "Array performance" patented technology

The invention belongs to the technical field of design and manufacture of millimeter-wave circularly-polarized antennas, aims to solve the problem of difficulty in integration of broadband, high efficiency and arraying of existing millimeter-wave circularly-polarized antennas, and provides a broadband circularly-polarized panel array antenna. The broadband circularly-polarized panel array antenna has the advantages that a novel 90-degree phase delay line is used for feed of a cross recess, four parasitic patches added above the cross recess are used for improving antenna unit gain and 3dB axial ratio bandwidth, and the designed 90-degree phase delay line has three independent branches which are used for phase delay, amplitude compensation and matching adjustment respectively; a group of short-circuit metal holes are designed beside a strip line to effectively inhibit spreading of a TEM (transverse electromagnetic) mode outside a feed network area, unit cross coupling is reduced greatly, and arraying performance is guaranteed; the antenna made of a multilayer PCB (printed circuit board) has the advantage of low cost and is applicable to millimeter-wave large-scale circularly-polarized arraying, and the problem of difficulty in integration of circularly-polarized antenna efficiency and the axial ratio bandwidth on millimeter-wave frequency bands is solved.

Apparatuses and methods for optimizing power generation of a solar array are disclosed. The bus voltage is regulated with a regulator controlled through one or more reference signals. When the power bus is being used by electrical systems that are tolerant of a higher variable voltage range, the bus voltage can be temporarily set higher by a commanded reference signal to allow additional solar array power to supply to the power bus. The peak power point may be identified through an established relationship with the solar array performance as a function of temperature, season and/or the age of the solar array. In addition, a reference signal controlled by one or more temperature sensors on the solar array may also modify the bus voltage set-point. Improved solar array power may be extracted from spacecraft beginning-of-life to end-of-life operations due to low insertion loss of a direct energy transfer scheme.

Photovoltaic array performance monitoring is disclosed herein. A photovoltaic array performance monitoring system may include a data acquisition unit coupled with reference and ambient photovoltaic panels. The reference photovoltaic panel is equipped with a soiling removal unit which periodically removes deposited soiling materials from an active photovoltaic collection area of the reference photovoltaic panel. The ambient photovoltaic panel accumulates light obscuring soiling materials at a rate approximately equal to those of a proximate photovoltaic array. The data acquisition unit periodically sends electrical energy measurements of the reference and ambient photovoltaic panels to a computing system. Over time, the electrical energy output differential between the reference and ambient photovoltaic panels exceeds a predetermined threshold. The computing system evaluates the electrical energy measurements and determines when it would be cost-effective to clean the photovoltaic array. The result is output in a human cognizable format and/or a machine readable format.

The invention discloses an ultra-wideband strong-coupling array antenna. The array antenna comprises a plurality of antenna units arranged in an array. Each antenna unit includes a dipole antenna array element, a tapered Balun converter, and a resistive frequency selection surface, wherein the dipole antenna array element is a bowtie-shaped short dipole antenna, the resistive frequency selection surface is arranged below the dipole antenna and shaped as a square ring, the tapered Balun converter is arranged below the dipole antenna array element and passes through the resistive frequency selection surface, and the output end of the tapered Balun converter is connected with the port of the dipole antenna. A metal ground plate is arranged below the antenna units. The array antenna can break through the restriction of the grating lobe condition, the unit size and the metal ground plate on the array performance, can work normally in a larger broadband scope, and can meet the functional requirements of different platforms and different tasks.

The invention provides a method and system for monitoring array performance and identifying faults of a photovoltaic assembly. The system includes a data aggregation and storage unit, a photovoltaic array performance recession monitoring unit and a photovoltaic assembly fault identifying and positioning unit. The method includes the following steps: S1. acquiring operation condition parameters and operation performance parameters of the photovoltaic array assembly, the operation condition parameters including environment temperature and radiation illumination, the operation performance parameters include assembly working temperature, working current and voltage; S2. real-time monitoring performance recession of the photovoltaic array assembly; S3. establishing a fault identification knowledge database, and realizing fault identification and positioning of the photovoltaic array assembly. According to the invention, the method and system, through wireless signal acquisition, transmission and data analysis, can realize real-time monitoring of performance recession state of the photovoltaic assembly, and determine fault types and fault positions through fault identification, and provide support for remote intelligent operation and maintenance of a solar power station system.

A wordline-to-bitline timing ring oscillator circuit for evaluating storage cell access time provides data on internal bitline access timing, and in particular the total wordline select-to-bitline read output timing. Columns of a storage array are connected in a ring, forming a ring oscillator. The bitline read circuit output of each column is connected to a wordline select input of a next column, with a net inversion around the ring, so that a ring oscillator is formed. The period of oscillation of the ring oscillator is determined by the total wordline select-to-bitline read circuit output timing for a first phase and the pre-charge interval time for the other phase, with the bitline read timing dominating. The circuit may be applied both to small-signal storage arrays, with the sense amplifier timing included within the ring oscillator period, or to large-signal storage arrays, with the read evaluate circuit timing included.

A system comprising a performance module and an application. The performance module may be configured to (i) monitor a LUN for a predetermined amount of time, (ii) capture information relating to the LUN, and (iii) store the information. The application may be configured to (i) retrieve the information, (ii) analyze the information, (iii) generate a configuration based on the analysis of the information and (iv) send the configuration to the performance module. The performance module may reconfigure the LUN based on the configuration.

A self-common phase on-chip interference spectrum imaging method comprises the following steps: S1, determining lens array distribution according to a lens array usefulness function; S2, enabling lenses to make primary phase adjustment for incident lights through a dielectric wetting effect or integral body deformations; S3, enabling the primarily phase adjusted incident lights to form baseline pairs through a photon integration chip, and accurately adjusting phases of the base line pairs so as to form interferences, thus forming interference images; S4, extracting information of the interference images; S5, using a photon interference image reconstruction method to obtain a target digital image and a spectrum image according to the interference image information.

The invention discloses a performance evaluation system and method of a photovoltaic system. The system comprises a data acquisition module and a performance evaluation unit. With utilization of direct-current data, alternating-current data, and meteorological data collected by the data acquisition module, normal working data and to-be-tested data form samples; standardization is carried out and a mahalanobis distance is used as a performance evaluation index to carry out direct-current power evaluation; a similarity level CV value of evaluation done twice is calculated; if the CV is larger than 0.8 and is less than 1 or is larger than 0.6 and is less than 0.8, the system performance is indicated to be good and then new round evaluation is carried out; and if the CV is larger than 0 and is less than 0.6, the system performance is indicated to be poor, a main factor influencing the system performance is extracted by using a principal component analysis method, and the photovoltaic array performance, assembling aging, and inverter performance are analyzed, and then the analysis result is displayed on an upper computer interface. According to the invention, the implementation process is simple and is easy to do; the photovoltaic system performance can be analyzed timely; the working state of the photovoltaic system can be gotten accurately; and the stability and reliability of the system are improved.

A system and method for predicting active, low-frequency sonar array performance in shallow, littoral waters using a physics-based modeling of acoustic reverberation. An operator characterizes the active sonar's acoustic transmitter and receiver, the environment it is operating in and the targets to be detected. The operator selects appropriate bathymetry, bottom composition and sound-speed profile. The spatial resolution of the bathymetry database is enhanced using fractal interpolation and a bottom-loss-and-scattering corrected-for-slope is calculated. A semi-empirical scattering strength is derived from a wind-speed data base and a stochastic biologic realization is derived from a biologic population database. These are then used to calculate a deterministic component of bottom, surface and volume reverberation using a normal mode mathematical model of acoustic wave propagation. A stochastic realization of clutter is calculated using a Generalized Gamma distribution database, and combined with the deterministic components of reverberation.

A satellite power supply system characteristic parameter calculation and multi-orbit energy balance determination method comprises a satellite power supply system timing function, an orbit counting function and a characteristic parameter calculation function. The power supply system timing function and the orbit counting function complete the accumulation of shadow time and illumination time in a track orbit, remove the deviation influence caused by the moon shadow and complete the accumulation of orbits. The characteristic parameter calculation function is characterized in that parameters reflecting the degradation of the storage battery pack performance, the parameters reflecting the degradation of the solar battery array performance and the parameters used for calculating multi-orbit energy balance are selected, and a calculation method is given. The power supply system timing function and the orbit counting function are the basis of characteristic parameter calculation; by statistics and calculation on the characteristic parameters, key data is provided for on-orbit performance degradation assessment of the storage battery pack and the solar battery array, and the determination of multi-orbit energy balance is completed.

The invention discloses a mixed signal arrival direction estimation method based on a co-prime array, and the method comprises the following steps: collecting the array element distribution information of a receiving end antenna co-prime array, and roughly estimating the number of signal sources; carrying out dimension expansion on the received signal by utilizing the circularity and non-circularity characteristics of the transmitted signal, calculating an autocorrelation matrix of the dimension expansion signal, and reconstructing the autocorrelation matrix into a vector; estimating a signalarrival direction by utilizing a covariance matrix obtained after spatial smoothing; taking out a plurality of estimation directions with the best estimation performance, and estimating the corresponding signal power; and calculating an autocorrelation matrix of the original received signal, reconstructing the autocorrelation matrix into a vector, deleting components corresponding to the non-cyclic signal from the vector, and estimating the direction of arrival of the cyclic signal through spatial smoothing operation and by using a MUSIC algorithm on the obtained covariance matrix. According to the invention, the array performance can be further enhanced, and more signal sources can be distinguished by fewer array elements.

The invention discloses an active correction method for a low-complexity ADS-B anti-interference array antenna. The method comprises the steps: receiving an airplane ADS-B signal through an array antenna; obtaining the longitude and latitude and height of an airplane through the demodulation of one signal, and recording the moment when the ADS-B signal arrives at the antenna; cutting the ADS-B signal received by the array antenna according to the moment when the ADS-B signal arrives at the antenna; solving the position of the airplane according to the ADS-B signal, and calculating the direction of the ADS-B signal through combining with the pre-measured position of the array antenna; correcting the array antenna through an active correction method with the known signal direction; taking a large number of ADS-B signals as an auxiliary signal source for correcting the array antenna, and solving the mean value of a plurality of correction results. The method does not need an additional auxiliary signal source, combines the advantages of two modes: active correction and self-correction, is small in calculation burden, is good in effect, and does not need the manual setting of the additional auxiliary signal source. The array performance is remarkably improved after correction.

The invention discloses a PCIE SSD array data reading method and system and a PCIE SSD array data read-write method. Data is directly transmitted from an FC module to a shared memory of a PCIE SSD disk controller without passing through the system memory. Therefore, the system memory cannot become the bottleneck restricting the array performance. In addition, as each PCIE SSD disk is provided with a memory, the memory performance of a disk cannot become the bottleneck restricting the array and disk performance so long as the read-write performance of the memory on each disk is twice of the read-write bandwidth of the disk per se.

A device comprises a platform constructed and arranged to be mounted to one or more solar array modules and one or more solar irradiance sensors on the platform configured to receive incident solar energy, the solar irradiance sensors oriented on the platform so that the received incident solar energy is comparable to that received by the solar array modules, the one or more solar irradiance sensors providing solar irradiance signals in response to the incident solar energy. A processor is on the platform, the processor configured to receive the solar irradiance signals and, in response, generating a performance reference metric based on the solar irradiance signals, the performance reference metric related to the expected performance of the one or more solar array modules to which the platform is mounted. A transmitter is on the platform, the transmitter configured to periodically transmit the performance reference metric to a receiver.

A system and method for predicting passive, high-frequency sonar array performance at any underwater location, implemented as a software package running on a computer. An operator selects an arbitrary geographical location, specifies a sonar array and defines a target. The necessary bathymetry, and associated oceanographic, environmental and meteorological data are automatically acquired or generated, along with appropriate models for ocean surface and bottom reflectivity, and vertical noise directionality. A Comprehensive Acoustic System Simulation (CASS) software module performs appropriate ray tracing, which is used to produce Cross-Spectral Density (CSD) matrices for the target and the anisotropic ambient noise. These are used to generate graphic and numeric representations of the array's performance at the selected location. A time of year may also be specified and the appropriate anisotropic noise field for conditions expected at that location at that time of year will be generated. Shipping realizations may be incorporated.

The invention relates to a method for having access to a disc array through partition remapping. Region dividing is carried out on a storage medium by obtaining all storage medium information, the disc array is built in a traditional mode, the access to the disc array is achieved through several steps like partition remapping, and after the partition remapping, the access of an original disc array to a physical region is changed to the access to a logic region. According to the disclosed stripe remapping method, stripes in a disc array set are remapped, a magnetic track on the outermost circle and a magnetic track relatively close to the inner circle are combined, a magnetic track on the innermost ring and a magnetic track relative to the outer circle are combined, wave crests and wave trough with the disc array performance are balanced and integrated, and therefore the aim of balancing IO performance of the disc array is achieved.

The present invention discloses a data reading method and system and a data read/write method for a PCIE (Peripheral Component Interconnect Express) SSD (Solid State Drive) array. Buffer and cache of IO data is not located in an array system memory, but located in a shared memory of an FC module. According to the data reading method and system and the data read/write method for the PCIE SSD provided by the present invention, it is avoided that system memory performance becomes a bottleneck that constraints array performance; and additionally, because each PCIE SSD disk has a self memory, memory performance on the disk can be ensured not to be the bottle that constraints array and disk performances with the only need for ensuring that memory read/write performance in each disk can reach twice of a read/write bandwidth of the disk.

The invention discloses a directional diagram restoration method after array element failure of broadband wide-angle scanning phased-array antenna. The directional diagram repairing method comprises the following steps: assigning 0 to a related failure array element weight coefficient; calculating an array directional diagram function of the broadband wide-angle scanning phased-array antenna afterarray element failure, and aiming at the problem of linear array failure, selecting a peak sidelobe level in a reconstruction directional diagram of each frequency point by a fitness function; performing repairing after the area array fails, and selecting the accumulated value of the peak sidelobe level corresponding to each frequency point reconstruction directional diagram as a fitness function; optimizing the remaining intact array element excitation by using a brainstorm optimization algorithm; and taking the solved optimal individual variable value as the excitation weight of the remaining effective array elements to obtain a restored array directional diagram result, and evaluating the array performance according to the repaired array directional diagram result. According to the method, under the condition that the array elements are not replaced, the array with part of array elements failing is restored, and the restoration cost is reduced; and a brain storm optimization algorithm is introduced, so that a globally optimal solution of an optimization problem can be obtained more easily.

A technique facilitates obtaining seismic data in a marine environment. An array of acoustic sources is deployed in a marine environment. The array can be utilized for creating acoustic pulses that facilitate the collection of data on subsea structures. The methodology enables optimization of acoustic source array performance to improve the collection of useful data during a seismic survey.

The invention discloses a PCIE SSD array data writing method and system. Data is directly transmitted from an FC module to a shared memory of a PCIE SSD disk controller without passing through the system memory. Therefore, the system memory cannot become the bottleneck restricting the array performance. In addition, as each PCIE SSD disk is provided with a memory, the memory performance of a disk cannot become the bottleneck restricting the array and disk performance so long as the write performance of the memory on each disk is twice of the write bandwidth of the disk per se.