39results about How to "Save machine time" patented technology

The invention relates to a fault simulation system and a fault analysis method for single event upset in a large scale integrated circuit SRAM-type FPGA (Field Programmable Gate Array). The fault simulation system comprises a host computer and a control board, wherein the control board comprises a fault injection module, a fault detecting module and a fault analyzing module. The fault simulation system and the fault analysis method provided by the invention are flexible to use, low in cost, high in simulation precision, fast in simulation speed and free from any physical damage to a chip.

The invention belongs to the technical field of rapid laser repair, and particularly relates to a rapid laser repair method and a device for a defect of an aluminum alloy guide blade. The device is characterized by comprising an industrial control computer, a robot control cabinet, an optical fiber laser, a powder feeding device, a robot body, a camera, a laser ranging sensor, a laser light path unit, a coaxial powder feeding nozzle, a workbench and an argon gas cylinder, wherein the industrial control computer is connected with the camera and the laser ranging sensor through cables and is connected with the robot control cabinet through an Ethernet cable, the robot control cabinet is connected with a robot body through a cable, is connected with an I/O (input/output) port of the optical fiber laser through an I/O port and is connected with the powder feeding device through a cable, and the optical fiber laser is connected with the laser light path unit through a conductive optical fiber. The device has high efficiency and good reliability, and the quality of repaired parts is stable.

The invention relates to a rapid collective Kalman filtering assimilating method for real-time data of high-frequency observation data. The method comprises: collecting the high-frequency observation data and controlling the quality; calculating an observation error covariance matrix; obtaining the error covariance matrix of background fields by calculating a forecast trend, i.e. the difference value of the adjacent background fields; utilizing the covariance matrix, the error covariance matrix of the background fields, the observation data and the background fields currently obtained by the calculation of a marine numerical model so as to carry out the real-time assimilation on the observation data of different moments, assigning the updated analysis field to the initial field of the next-moment integral and continuously forecasting forwards; and repeating the operations, thus realizing the real-time assimilation on the high-frequency observation data of different moments in the integral course. The assimilating method has the advantages that the real-time assimilation of the high-frequency observation data is realized; the assimilation efficiency of the data is enhanced; the defect that a large amount of collective models are simultaneously operated in the implementation course of the traditional EnKF (ensemble kalman filter) is overcome; the problem of non-convergence is avoided; and the purposes of accurate numerical simulation and marine forecasting are reached.

The invention relates to a modal parameter recognizing method based on multi-input multi-output signal noise reduction. The method is characterized by comprising the steps of step 1, performing block-Hankel matrix conversion on noise-containing multi-point pulse responding signals to obtain a first block-Hankel matrix; step 2, processing the first matrix by utilizing structural low rank approximating according to the rank of the first matrix to obtain a first non-block-Hankel matrix after the low rank approximating; step 3, replacing the elements of each block in a second matrix with math average values of the block elements on a back-diagonal to obtain a second block-Hankel matrix; step 4, repeating the steps 2 and 3 until convergence, thus obtaining the noise-reduced multi-point pulse responding signal; and step 5, performing modal parameter recognizing. The modal parameter recognizing method based on multi-input multi-output signal noise reduction can save machine time and improve recognizing accuracy.

Short and/or rod-shaped workpieces are completely machined by grinding two parallel end faces and the longitudinal sides of the workpiece with very short cycle times. The grinding machine includes two grinding spindles that are arranged in a tandem arrangement with parallel rotational axes on a shared grinding headstock and that are jointly moved in the X direction. In cooperation with a special holding and transport device for the workpieces, two workpieces are each ground, at least partly concurrently, the end faces of the one workpiece being ground in one machining position and the final non-circular grinding of the exterior contour of a second workpiece occurring in a second machining station, the end faces of the second workpiece having already been ground.

The invention discloses a fatigue tester which is suitable for a long-term fatigue performance test of test pieces such as beams, reinforcing steel bars and the like in civil engineering. The fatigue tester mainly comprises four parts, namely a host machine, a beam test piece reaction frame device, a reinforcing steel bar test piece reaction frame and a control system. The host machine is actuated by a motor and provides a reciprocating displacement after a force is amplified and the displacement is shortened by a pulley block. The host machine is respectively matched with a beam test piece reaction frame system or a reinforcing steel bar test piece reaction frame system to finish fatigue loading of two kinds of test pieces; and reciprocating displacement amplitude is adjusted by an eccentric adjuster embedded on a motor shaft. The tester disclosed by the invention has the advantages of simple structure, convenience for processing, assembling, disassembling and replacing, low construction cost and stable long-term work performance; and the fatigue tester can be used for carrying out fatigue loading of multiple test pieces and multiple amplitudes.

The invention belongs to the technical field of natural electric field numerical simulation methods, and particularly relates to a natural electric field three-dimensional multidirectional mapping coupling numerical simulation method. The method comprises the following steps: S1, establishing a natural electric field electric model, wherein the regional subdivision of the model comprises a finiteelement and an infinite element; S2, constructing an edge value problem of the model; S3, constructing a functional for the edge value problem and solving variations of the functional; S4, starting from the variation problem, performing unit analysis on the finite element and the infinite element respectively, and solving to obtain a finite element stiffness matrix and an infinite element stiffness matrix; S5, assembling the finite element stiffness matrix and the infinite element stiffness matrix to obtain a total stiffness matrix; and S6, obtaining the potential value of each node in the natural electric field electric model through the total stiffness matrix. According to the method, the numerical calculation precision is improved while unit subdivision is reduced, the number of calculation times of the total stiffness matrix is reduced to improve the calculation efficiency of numerical simulation, and accurate and effective numerical simulation of the multi-source dynamic natural electric field is achieved.

The invention relates to a coiler side guide plate control method for preventing steel coils on a hot rolling production line from staggering, and belongs to the technical field of metallurgical plate production process. The technical scheme includes that programming is changed in a PLC (programmable logic controller) for controlling a coiler side guide plate, a force control link is added into a side guide plate control logic of a position control side, the side guide plate of the position control side is switched to the force control link and presses strip steel after a coiler mandrel is loaded, and then positions are controlled. The coiler side guide plate control method has the advantages that the problem that a side guide plate of a position control side cannot press strip steel is effectively solved, tail staggering of the steel coils is prevented, compared with an improved side guide plate control mode, the coiler side guide plate control method enables the side guide plate of the position control side to automatically position the edge of the strip steel without manual intervention and is efficient, safe and reliable, owing to double-sided pressure control, the strip steel is more rapidly pressed as compared with traditional one-sided pressure control, scrolling of inner rings can be more effectively controlled, and as the problem of swing after pressing of the side guide plate is solved, the replacement cycle of a transmission mechanism for the side guide plate can be prolonged, the expense of spare parts is saved, and maintenance time is shortened.

An apparatus for testing the accuracy of machine tools and measuring devices has a support and at least one reference element formed as a sleeve, wherein the reference element is glued on top of the support.

The invention discloses a petroleum and natural gas cost compilation integrated system and method, and the system comprises that a summary data standard template building module which takes the integrated work of engineering cost as the basis, and combines the characteristics of each design major to build a summary data standard template conforming to each design major; The summary index standardized data decomposition module classifies the summary indexes of the design majors according to different attributes to obtain decomposed summary index standardized data; The design data standardization data decomposition module is used for carrying out data standardization on the design data of each design major based on the standardization data after the summary index is refined to obtain designdata standardization data after decomposition; And the summary index and design data mapping relation establishing module is used for carrying out one-to-one correspondence on the decomposed summary index standardized data and the decomposed design data standardized data to form a mapping relation. Compared with the prior art, the method has the positive effect that the standardization, efficiencyand quality of the summary compilation work are improved.

In order to grind bar-shaped workpieces which have a non-circular cross-section and flat faces which are parallel to each other, two partial operations are performed consecutively. First, the bar-shaped workpiece is rough ground and finished on the faces by way of double-disk face grinding. The bar-shaped workpiece is clamped on the longitudinal sides in the first clamping position thereof, and the bar-shaped workpiece is transported between two clamping jaws, which clamp the workpiece in the second clamping position thereof on the faces. The first clamping position is then released, and the bar-shaped workpiece is rotated by the clamping jaws. A CNC-controlled peripheral grinding step is performed based on CX interpolation principles. This rough grinds and finishes the longitudinal sides of the bar-shaped workpiece. Transport from the first to the second clamping position is effected by a clamping station, which concomitantly forms the holder for the face grinding operation.

The invention discloses a single-particle transient effect evaluation method and a system for a high-speed digital-to-analog conversion circuit. The method comprises the following steps: (1) configuring a pattern for a high-speed digital-to-analog circuit to be tested, so that the high-speed digital-to-analog circuit to be tested outputs an analog signal according to the pattern; (2) collecting the analog signal and converting the signal into a digital signal, when the high-speed digital-to-analog circuit is judged to be in a normal working state according to the digital signal, executing step(3), otherwise, re-executing from step (1) until the circuit is in normal working condition; (3) performing a heavy ion test on the high-speed digital-to-analog circuit to re-acquire the analog signal output from the high-speed digital-to-analog circuit to be tested and perform analog-to-digital conversion, and comparing the converted digital signal with the pattern in step (1), if the differencebetween the two exceeds the set threshold, considering that a single-particle transient effect occurs in the high-speed digital-to-analog circuit to be tested; (4) performing error statistics on thesingle-particle transient effect of the high-speed digital-analog circuit to be tested during the heavy ion test; and (5) calculating an error interface T of the high-speed digital-to-analog circuit to be tested under the heavy ion, and using the T to evaluate the single-particle transient effect of the circuit.

The invention discloses a testing system and method of a JESD204B protocol high-speed sender single-particle error rate. The testing system is built by a high-speed sender and a programmable logic device. The programmable logic device generates parallel data to a parallel end of the high-speed sender, the high-speed sender is configured at the same time, serial data generated by the high-speed sender are sent to the programmable logic device, serial-to-parallel conversion is carried out, and then the programmable logic device parses low-speed data, and detects the single-particle error rate ofthe high-speed sender. According to the system, a single-particle machine time utilization rate is effectively improved, a data link is complete, the programmable logic device is utilized for deserializing on the high-speed serial data to form the low-speed parallel data for processing rather than using expensive instruments such as error code instruments and high-speed oscilloscopes for monitoring, high-speed signal testing stability is improved, and test costs are reduced; and automatic classification is carried out according to different error types for counting, and testing efficiency isimproved.

An information exchanging method of commercial electronic device includes appointing one or multiple digital code bank between electronic devices, forming digital code bank mainly by table meaning codes and enabling to carry out random combination between various table meaning codes for forming digital code information and between various random codes.

The invention provides a mark for monitoring the opening precision of a shading sheet of a photoetching machine and a use method of the mark. The mark comprises a photomask provided with a graphic area and a shading belt surrounding the periphery of the graphic area, labels arranged on inner and outer edges of the shading belt, and an anti-dazzling screen on the photoetching machine, wherein the anti-dazzling screen binds the graphic area and is used for controlling the size of the light-transmitting opening of the photomask, the distance between the outer edge of the shading belt and the graphic area is the precision specification L of the photoetching machine table, the precision rule L is greater than or equal to M and less than or equal to N, the distance between the lable on the inner edge of the shading belt and the graphic area is M/2, and the distance between the label on the outer edge of the shading belt and the graphic area is N+100 microns. By adding the overlay precision labels on the shading belt, online real-time monitoring can be realized, and manpower and machine time are saved; product light leakage or excessive shading caused by the fact that the opening of the anti-dazzling screen is too large or too small is effectively prevented; and through system measurement and grabbing, automatic processing is realized.

The invention provides a constitution method of a departure flight traction taxiing system. The constitution method comprises the steps of obtaining fleet information, obtaining model information, optimizing the combination of the number of tractors, supplying the number of the tractors according to the maximum peak of take-off flights, waiting for traction and the like. The constitution method of the departure flight traction taxiing system has the beneficial effects that flight delay can be well handled due to planning and system improvements, and the case that flights queue up in peak periods on a taxi track to waste fuel oil can be avoided. In addition, the view of the tractors is of 360 degrees so that air pilots can be prevented from going wrong and from taxiing collision, and therefore, the safety of the flights running on the ground can be improved.