36results about How to "Solve the complex calculation process" patented technology

The invention discloses a double-bus energy balance analysis method for a spacecraft. The double-bus energy balance analysis method comprises the following steps of calculating solar wing output power by measuring a sun angle of incidence and a shielding area of a solar cell array; calculating load required power by measuring percentage of cable loss power and total power of electric equipment; determining a working state of a storage battery by calculating the solar wing output power and the load required power; determining the charging mode of the storage battery, and determining the current capacity of the storage battery by calculating the charging current and the discharging current; and evaluating the energy balance state of the storage battery according to the initial capacity, the current capacity and the total capacity of the storage battery. According to the double-bus energy balance analysis method, by determining the charging stage of the storage battery, the influence on the electric quantity of the storage battery from different bus voltages under the double buses is distinguished, thereby improving the calculation precision of the double-bus crossed-power-supply energy balance, and solving the problem of complex calculation of the electric quantity of the double-bus crossed-power-supply storage battery.

It discloses a precise locating method of utilizing indoor visible light communication system, which belongs to the field of visible light communication; arranging any number of light emitting diode (LED) lamps indoors, setting the signal transmission power of each LED lamp to be the same and fixing the absolute location of each LED lamp, the terminal required for locating is equipped with several receiving devices, whose relative positions are known, then a position coordinate of the terminal can be obtained by determining the geometric center position of this set of receiving devices through calculating the measured light signal power of the receiving devices on the terminal.

The invention relates to a multi-dimension statistical method of testing objects in a communication performance network management system, in particular to the multi-dimension statistics on the testing objects in a mobile communication network management system. When carrying the statistics on the testing objects, the invention aims at the testing objects and establishes a performance index set corresponding to the testing objects for solving the problem of disunity of computing formulas of the same performance index caused by equipment of multiple manufacturers. A statistical module of the testing objects on the statistical object dimension and the time dimension is determined according to the performance index set. When the statistical object dimension and the time dimension of the testing objects are changed, the statistical process on the testing objects does not need manual participation, the automatic statistics on the statistical object dimension and the time dimension on the changed testing objects can be realized, and the flexibility and the efficiency of the system are improved.

The invention relates to a motion detection method based on edge detection and frame difference. The method comprises the following steps of: 1, acquiring an image sequence and determining images of a reference frame and a current frame; 2, performing Gaussian filtering on the images of the reference frame and the current frame; 3, extracting the edge information of the reference frame and the current frame after the filtering; 4, acquiring converted images of the reference frame and the current frame; 5, performing the frame difference on the converted images of the reference frame and the current frame, and determining a motion region by using a double threshold value method; and 6, performing image post-processing on the motion region, and determining a motion object. The method has the advantages that: due to the adoption of the thinking of frame difference, the method is simple and practical, the complex computations of an optical flow method and hybrid Gaussian are avoided, computing time is only 1 / 3 of that of classical hybrid Gaussian, and requirements on the real-time performance of intelligent monitoring are met; incomplete frame difference detection results are improvedto a certain extent by the combination of the edge detection and the frame difference and a series of additional processing; and compared with the hybrid Gaussian serving as a mainstream method, the method is difficult to influence by illumination and external interference.

The invention discloses a high-efficiency calculation method for a linear sweep polarography model. A mean value theorem of integrals and a Newton-Leibniz formula are applied to converting an integral part of the linear sweep polarography model, i.e., a Sevcik current formula, into an equivalent model containing no integral terms; the model is divided into three intervals to perform equivalent transformation in the entire change interval by analyzing the characteristics of the equivalent model, and the three intervals are combined by analyzing the characteristics of the equivalent models of the three intervals, so that the unification of the linear sweep polarography interval equivalent models in the entire change interval is realized; meanwhile, considering the error produced in the equivalent transformation process, the linear sweep polarography equivalent model which is formed through linear superposition of two sub-models is finally obtained by adding an error compensation model in the combined model. After testing, the linear sweep polarography model can be accurately calculated, and meanwhile, the parameter identification time is reduced by over 90 percent.

The invention discloses an imaging method and system for long-distance anti-atmospheric turbulence. Under the solar light field, a detector is used to perform N times of continuous imaging on a target object. The interval between two adjacent imaging is greater than the exposure time of the detector. The correlation between each point and itself, using the results of N consecutive imaging to calculate the intensity variance of each point, can obtain image quality with high contrast and signal-to-noise ratio. Compared with traditional direct imaging, the imaging scheme proposed by the present invention eliminates the influence of atmospheric turbulence, improves the practicability of associated imaging technology, can be directly used for long-distance anti-atmospheric turbulence imaging, and increases the image recognition rate.

The present invention relates to a method and system for estimating the contact force of the musculoskeletal model of the knee joint driven by electromyographic signals. The method includes: establishing a contact force estimation model, including a signal processing model, an OpenSim individual model, a muscle activation model, and a muscle contraction mechanics model As well as the external adduction torque model, the signal processing model preprocesses the input data, the OpenSim individual model scales the general model to individual physiological parameters, the muscle activation model is used to obtain muscle activation, and the muscle contraction mechanics model is used to obtain muscle torque. The external adduction torque model is used to obtain the external adduction torque; optimize the parameters of the contact force estimation model; obtain the myoelectric signal data, joint angle signal data and plantar pressure signal data, and input them as input signals into the parameter optimized In the contact force estimation model, the knee joint contact force is calculated. The method and system are convenient to use, and are conducive to improving the accuracy of contact force estimation.

A method for solving inverse kinematics of a 6R industrial robot of the present invention, the method is: establish a simplified geometric model of a 6R robot and a D-H table; according to the simplified geometric model, establish the space between the joint angle of the first joint and the origin of the end link coordinate system The functional relationship between the coordinates; under the condition that the joint angle of the first joint has been determined, the spatial position relationship of the second link and the third link is simplified into a triangle, and the functional relationship of the joint angle of the second and third joints is established ; Under the condition that the joint angles of the first to third joints have been determined, the z-axis direction vectors of the fourth, fifth, and sixth link coordinate systems are used to establish a spatial geometric model with the joint axis of the fifth joint as the central axis, From the space geometry model, the joint angle function relational expression of the fifth joint is established first; then the joint angle functional relational expressions of the fourth and sixth joints are established. The invention improves the efficiency and attitude precision of the inverse solution method of the robot.

The embodiment of the invention provides an airborne distributed type POS (Position and Orientation System) real-time transfer alignment method and device. The method comprises the following steps: establishing a transfer alignment mathematical model and an error model of a large misalignment angle condition; carrying out time updating and measurement updating of a linear state variable and a non-linear state variable by utilizing KF (Kalman Filter) and UKF (Unscented Kalman Filter) respectively; then revising a speed, a position and a gesture of a subsystem by utilizing a linear state variable estimated value and a non-linear state variable estimated value. A position error and the linear state variable estimated value in a non-linear filtering process are used as parameters and the non-linear state variable estimated value in a linear filtering process is used as an error of the parameters, and compensation is carried out when a non-linear state variable one-step predicated covariance matrix and a linear state variable one-step predicated covariance matrix are calculated respectively, so that the transfer alignment precision is improved.

The invention relates to a superhard material grinding wheel micro wear quantity on-line detection method and system. According to the superhard material grinding wheel micro wear quantity on-line detection method and system, when a grinding wheel performs idling on a machine tool, light beams emitted by a laser displacement sensor are made to be irradiated in the direction perpendicular to the grinding surface of the grinding wheel, the laser displacement sensor is made to perform constant-speed moving in the direction parallel to the grinding surface of the grinding wheel, and in the movingprocess, preliminary sampling data are obtained; envelope curve extracting is performed after pretreatment is performed on the preliminary sampling data, and first and second envelope curve data are formed; two-time jumping change points are seeked from the difference between the first and second envelope curve data, and the first envelope curve data between the two points are taken as the data ofan area wherein the grinding surface of the grinding wheel is in; a reference surface average value is obtained according to the data after the pretreatment; the height data of grinding surface of the grinding wheel are obtained according to the data of the area wherein the grinding surface of the grinding wheel is in and the reference surface average value; and the height data of the grinding surface of the grinding wheel before grinding and the height data of the grinding surface of the grinding wheel after the grinding are obtained, so that the grinding wheel wear quantity is obtained. Bymeans of the superhard material grinding wheel micro wear quantity on-line detection method, the detection precision of the grinding wheel wear quantity is improved.

The invention discloses a physical-layer network coding method based on a Gaussian waveform. An implementation scheme for the method comprises the following steps of respectively carrying out linear coding on information sequences uA and uB of two users and mapping to matrixes DA and DB according to an M-ary quadrature amplitude modulation corresponding relation; correspondingly converting each information symbol sequence to a kth subcarrier to be transmitted at a lth time slot after passing through a Gaussian filter; receiving a composite signal with additive white Gaussian noise and channel delay of two users at a relay R; transmitting the received composite signal into a simplified linear equalizer to compensate the influence of a fading channel; and then detecting and decoding the compensated signal and returning decoding output information to the two users. According to the method, the problem that the existing two-way relay network cannot eliminate multi-carrier displacement interference to affect system transmission efficiency and network utilization rate can be solved, and the method can be used for a two-way relay network system.