33results about How to "Reduce the amount of real-time calculation" patented technology

An online composition based aircraft return route programming method comprises the following steps: 1, plotting the geographic information of a whole flight line or only a selected typical area, and storing the geographic information in an airborne computer; 2, obtaining the inertial navigation information of an aircraft in real time; 3, obtaining a real time graph; 4, determining the current flight position; 5, estimating the inertial navigation error, and utilizing the estimated inertial navigation error to correct the navigation parameter of the aircraft; 6, storing the information-fused aircraft position information obtained in step 5 in the geographic information of the airborne computer according to a preset rule by the airborne computer in the aircraft flight process, and carrying out online composition of the information-fused aircraft position information; and 7, carrying out real-time track programming according to the online composition result and the task characteristic of the aircraft in the aircraft return process to complete flight guiding.

The invention discloses a three-dimensional map line element note automatic placing method, can be applied to automatically placing and adjusting writing nodes in a three-dimensional geographic scene. The method comprises the following stages of 1, pretreatment stage: attaching note reference lines to the surface of the earth, and building a note reference line layered tree structure; 2, a parallel traversal screening stage: dynamically building view point related reference lines, and executing shielded cutting based on a shadow map and monotonicity segmentation of the reference lines; and 3, a screen space note confliction processing stage: projecting the reference lines to a screen space, processing mutual confliction relation between the notes, and generating a renderable note object. By dynamically building the view point related note reference lines, the note automatic placing method can adapt to different view distance and variations of the viewing angle, and reflect the trend of line elements; in addition, shielding of surface features on the notes is avoided due to shielded cutting based on the shadow map, and the problem of confliction between the notes is solved by using a non-backtracking graph coloring algorithm in the screen space.

A method for generating human action animation of a two-dimensional virtual image, which is characterized in that the method comprises: shooting a live action video; extracting an initial frame image of the video; performing corner detection on the initial frame image; calculating sparse feature point optical flow frame by frame; Mesh deformation; calculation of modal meshes and weight sequences; editing of modal meshes and weight sequences; animation rendering of avatars using isomorphic 2d meshes. Compared with purely manual animations, this technical solution is more vivid and lifelike because the actions come from live videos, especially the authenticity of the deformation and the randomness of the rhythm of the actions, which are difficult to achieve by manual methods; and the 2D image has a certain three-dimensional effect. , the animation effect can be adjusted by manual modification according to the needs. Only the same configuration grid is required. The same set of motion data can be adapted to different images of different body shapes, different skins, different clothing, and different avatars. When animation is applied, the real-time calculation amount Small.

This invention relates to digital relay protection reverse limited characteristics realization method, which comprises the following steps: Switching on relay protective device; reading user set parameters to turn variable X1 to X2; computing (Ktau pIrp) / delta t and denoting it on variable X1; collecting current 1j with isolation time delta t; computing 1jr and summing it to variable X2; summing Ipr to variable X1; judging whether variable X2 larger than variable X1; if yes, then processing reverse protective operation, if not then restarting sampling, computing, comparing or judging.

The invention belongs to the field of transmission line maintenance, and in particular relates to a method for determining the number of transmission line channel visualization alarm areas, including the following steps: a. Offline training of the model based on transmission line channel visualization alarm data to obtain suggested values; b. Online decision-making Determine the definite value of the number of divisions of the transmission line channel visualization alarm area; the present invention can automatically determine the division number of the transmission line channel visualization alarm area, based on the determined value, identify the transmission line channel visualization alarm high-incidence area, and find out the alarm high-incidence area The coverage radius conforms to the inspection radius of transmission line maintenance personnel, which brings convenience to transmission line maintenance personnel.

The invention relates to an adaptive alignment method under the fixed earth coordinate system, the steps: (1) select the earth fixed coordinate system as the navigation coordinate system, and use the additive quaternion of position error, velocity error and attitude misalignment angle The numerical error is used as the system state variable. (2) The state equation consists of position error equation, linearized velocity error equation and attitude error equation. (3) Using the velocity and position observation information of the GNSS receiver to construct the observation equation. (4) Design an adaptive linear Kalman filter algorithm for initial alignment. The invention does not require static leveling, the amount of real-time calculation is small, the alignment process converges quickly, and the alignment accuracy is high.

The invention discloses a path planning system and method for a robot. The method includes: the path planning system for the robot pre-selects one or more position points as reference positioning points on a path for the robot to move in a predetermined area map; If an instruction to move the robot from the first position point to the second position point is received, according to the set reference positioning point and according to the predetermined path analysis rules, analyze the path from the first position point to the second position point. the path of the second location point, and control the robot to move to the second location point based on the analyzed path. The present invention does not need the robot to calculate the moving path in real time during path planning, but to make corresponding selections from the pre-planned paths, that is, the process of path planning is changed from "calculation" to "selection", which effectively reduces the amount of real-time calculations and improves the efficiency. Efficiency of path planning.

The digital method includes following steps: after power on, protector calculates value 1 of formula expressed in the invention; collecting current value at side of electromotor and calculating positive sequence current and negative sequence current; determining whether positive sequence current is larger than 0.06 time of rated current at secondary side of current transformer, and determining states of electromotor: in starting state or in operating state or stop state; calculating formatted heat value in each state respectively; cumulating formatted heat value in each state; determining whether the cumulated value is larger than or equal to value 2 expressed in the invention to decide whether to stop electromotor; after stopping motor, cumulating formatted heat value continuously; determining whether formatted heat value is smaller than value 3 to decide whether to restart motor is allowed. The method reduces quantity of real time computation and required calculation speed.

The invention discloses a resistance spot welding nugget diameter predicting method to solve the technical problems that the practicality of an existing resistance spot welding nugget diameter predicting method is poor. According to the technical scheme, electrode pressure signals are acquired in real time, a unary linear regression equation between the nugget diameter and the electrode pressure change curve rising slope is established, and the real-time predicting of the nugget diameter is achieved. A pressure sensor arranged between a bottom electrode holding rod and a bottom electrode of aspot welding machine is used for acquiring the electrode pressure signals, the sensor installation position is close to a welded workpiece, the effects caused by imbalance of stress in the movement process are reduced, the actual change situation of electrode pressure in the welding process is precisely measured, and the smelting amount of metal is accurately reflected in real time. By means of the unary linear regression equation between the nugget diameter and the electrode pressure change curve rising slope, online and rapid nugget diameter prediction is achieved; and by means of the resistance spot welding nugget diameter predicting method, the nugget diameters of quenched steel, low-carbon steel, stainless steel, an aluminum alloy and other metal materials can be predicted, and the practicality is good.

An adaptive ILC (iterative learning control) based coordinated control method for urban main roads comprises: a. determining a key intersection: for the controlled main roads, the intersection with the largest traffic demand is determined as the key intersection; b, initializing the common signal period, green time ratio and phase difference; c, optimizing the green time ratio at key intersections; d, optimizing the green time ratio at non-critical intersections; e, performing circulation, and repeating steps c and d every 3-5 signal cycles. According to the control method, the intersections are taken as a control object and are coordinated in pairs by flow correlation between the upstream and downstream intersections, green time of each phase of a traffic light is calculated with an ILC method according to real-time vehicle flow conditions, and finally, closed-loop controller parameters are set in real time by an unfalsified strategy. The real-time calculation amount of main road control is reduced, the traffic efficiency of the main roads is improved, the effect is better than that with the traditional timing control scheme, and the effective method is provided for coordinated control of the urban main roads.