414results about How to "Improve realizability" patented technology

The invention discloses a method based on segmented expansion Kalman filtering for estimating the state of charge of a lithium battery. The method mainly comprises the steps of firstly, establishing asecond-order RC equivalent circuit model according to a working mechanism of the lithium battery; secondly, according to experimental data of pulse discharge responses of the lithium battery, utilizing a recursive least square method (RLS) to identify model parameters; thirdly, establishing a state space model of lithium battery discretization, adopting a segmented EKF algorithm to estimate the SOC of the lithium battery. According to the method, the suitable expansion Kalman filtering algorithm is utilized while an intensity nonlinearization process is distinguished from the working processof the lithium battery, and the robustness in the process of adopting a traditional EKF algorithm to estimate SOC is effectively improved; the problem is solved that decrease of filtering precision and possible filtering divergence are caused by Taylor series expansion linearization.

The invention discloses a mainstream protocol implementation and monitoring analysis platform for an industrial control system. The platform comprises a simulation module for simulating a virtual controlled object, a controller PLC upper computer and a programmable logic controller (PLC) and a PLC industrial control protocol deep packet analysis and monitoring module, wherein the simulation moduleis used for simulating a mathematical abstract industrial control system; the PLC is used for receiving and storing a simulation system variable signal sent by the simulation module into a specific register and sending the signal to the upper computer, and meanwhile, receiving a control signal sent by the upper computer and sending the control signal to the controlled object of the simulation module; the PLC industrial control protocol deep packet analysis and monitoring module is used for acquiring protocol data flow of the industrial control system generated by communication between the upper computer and the PLC in real time, and carrying out real-time full analysis and monitoring on the acquired protocol data flow, the storage and the on-line display of an analysis result are realized, and meanwhile, the intrusion detection of the industrial control system is realized.

The invention belongs to the technical field of nuclear reactors and discloses a heating pipe-type dual-mode space nuclear reactor core. The reactor core comprises a reactor core active zone, a reactor core cylinder, a radial reflection layer, an axial reflection layer and a control drum. The reactor core active zone is located in the reactor core cylinder. The axial reflection layer is located above the reactor core active zone. The axial reflection layer is a hollow cylindrical structure. The reactor core active zone, the axial reflection layer and a heating pipe are located in the cavity ofthe radial reflection layer. The reactor core can effectively prevent the heat pipe overheating and has the beneficial effects of safety and reliability such as passive and non-single point failure.

The invention discloses a velocity measurement system of a track bicycle, consisting of a signal detection circuit, a power circuit, a main controller, a voltage regulation circuit, a wireless communication module and a memory module. The processing procedure comprises the steps that the signal detection circuit acquires signals generated by movement of a chain and performs the primary process on the signal; and the main controller can save the parameters such as the velocity and the like, and can control the wireless communication module to send the parameters to the user upper computer so as to finish the real time monitoring of the velocity of the track bicycle through the further analyzing of the processed signals. The velocity measurement system can send and save the data in real time without the need of transforming the bicycle body, save the use cost, and is suitable for masses of users.

The invention discloses an energy feedback and harmonic passive power compensation system applicable to a rectifying device, comprising a power transistor, a controlling device, a three-phase power bridge and a filtering device, wherein, the anode of the power transistor is connected with the anode of a diode rectifying DC voltage, and the cathode of the power transistor is connected with the anode of a DC bus voltage of the three-phase power bridge; the cathode of a diode rectifying DC bus voltage is connected with the cathode of a DC voltage of the three-phase power bridge; the controlling device is used to control the opening and cutting of a power transistor of the three-phase power bridge; the three-phase power bridge is used to provide DC bus voltage to the controlling device and control the closing of the power transistor according to a command from the controlling device to generate a compensation current and provides the compensation current to the filtering device; the filtering device receives the compensation current from the three-phase power bridge, compensates the compensation current to the power grid after filtering high harmonics and provides the current signals to the controlling device. The energy feedback and harmonic reactive power compensation system can play the roles of active filtering and passive compensation, feed back energy to the power grid and realize energy saving.

The invention relates to a method for identifying a cylindrical surface from multi-line laser radar point cloud data. The method comprises the steps that firstly a cylindrical surface fitting mathematical model is set; then, a cylindrical surface fitting pretreatment step is carried out, and a RANSAC algorithm and a rotation matrix are utilized to determine two-dimensional plane ellipse fitting coordinates of each line of laser beam section; a cylindrical surface fitting step is carried out, a least square method and a Lagrangian multiplier algorithm are utilized to construct and solve an ellipse optimization target equation, fitting points are randomly selected, and an optimal fitting ellipse is obtained through solving by utilizing a least square short axis inclination angle constraint condition; and finally, seven parameters of the cylindrical surface are obtained through singular value decomposition and optimization calculation. According to the invention, the problem of cylindrical surface identification encountered when the cylindrical surface is taken as a calibration object by the laser radar in the process of combined external calibration of the multi-line laser radar andthe camera in the field of environmental perception can be solved, and the cylindrical surface identification precision of the low-resolution multi-line laser radar is relatively high.

The invention discloses a millimeter wave antenna system, which comprises a metal frame with an antenna gap, a high-dielectric coverage layer, a signal transmission unit, a signal receiving and sending component and an intermediate frequency and base band processing unit, wherein the high-dielectric coverage layer is arranged on the outer side of the antenna gap; the signal transmission unit is arranged on the inner side of the antenna gap; the signal receiving and sending component is electrically connected with the signal transmission unit; the intermediate frequency and base band processingunit is electrically connected with the signal receiving and sending component; and the high-dielectric coverage layer, the antenna gap and the signal transmission unit jointly form the dielectric resonant antenna array of the millimeter wave antenna system. The antenna system provided by the invention has the characteristics of small land occupation, more correctable factors, high working efficiency and the like. The invention also provides another millimeter wave antenna system, a phased array module, a metal shell, a method for eliminating the backward radiation of the antenna radiation gap of the metal shell, a user terminal and millimeter wave communication equipment.