143 results about "Load step" patented technology

The present invention provides a power regulation system and method with high speed signal settling capabilities for providing rapid active transient response to a microelectronic device. An active transient response system includes a power supply configured to receive external and / or internal signals indicating the occurrence of transient load conditions and to respond to the transient load conditions based on one or more of these signals. The system may further include a transient suppressor configured for early detection of transients, assisting in transient suppression, and early signaling of transient activity to the power supply.The system provides rapid recovery to steady state operation from the active transient response mode by using a digital compensator to quickly modifying the duty cycle and provide a voltage offset proportional to the transient microprocessor load step. Recovery is further improved by current rephasing techniques.

The invention discloses double ring low voltage difference linear voltage regulator circuit. It includes error amplifier, secondary amplifier, power tube, compensating unit, output sampling network, load capacitance and load circuit, feed-forward amplifier, pull-up driving tube, pull-down driving tube, and sampling tube. It includes two loop circuits that the main one includes the error amplifier, secondary amplifier, pull-up driving tube, power tube, and output sampling network which form negative feedback loop to stably output voltage VOUT; the additional one includes feed-forward amplifier, sampling tube, pull-down driving tube, and power tube which refer to output voltage, form feed back loop to dynamically compensate circuit and further stably output voltage VOUT, and refer to load current, form positive feedback loop to increase load step change for the response circuit. The invention can supply better transient response, periphery circuit selecting, and phase margin for the circuit.

The invention provides a voltage stabilizer which is provided with one or more discharge circuits. The voltage stabilizer compensates less on-chip output capacitance and long loop response time. In an embodiment, the voltage stabilizer comprises an output transistor which is coupled with an output voltage wire, an output voltage sensing device which is coupled with the output voltage wire and is used for generating output feedback voltage and an error amplifier which is coupled with the output feedback voltage, the output transistor and reference voltage and is used for feeding back and controlling the output transistor. A first discharge circuit is coupled with the output voltage wire and a reference potential, wherein, the first discharge circuit is triggered by the status of sharply rising overvoltage. In the other embodiment, a combination of a fast discharge circuit and a slow discharge circuit is used for improving load step response that means preventing too high output voltage jump and drawing the output voltage to the stable value fast, so as to protect a load circuit.

The invention relates to a method for finite element optimization of bolt pretightening force and bolt structural design. A two-dimensional FEA (finite element analysis) modified model and the method are applicable to structural modeling of different bolts. By considering various types of nonlinear factors such as complex contact, friction, pretightening in threaded connection, three-dimensional spiral thread structures are simplified effectively by the planar FEA modified model while calculation precision is guaranteed. The pretightening force and an external force are loaded step by step by inputting component parameters and material attributes and integrating nonlinear factor relationships. A curve of maximum stress changing along with the external force and a curve of changing of maximum stress inside the thread along with the pretightening force are defined according to stress status in the thread area. The optimal pretightening force of threaded connection is determined by judging whether contact faces are separated or not. Optimal bolt structural design and optimal parameters are calculated according to maximum external force borne by the bolt structure and the required pretightening force of the bolt structure. The method is also applicable to rectangular or other nonstandard threaded bolt structures.

The invention discloses a real-time monitoring method for a power quality monitoring system and a terminal running state; a network topological graph or a GIS geographic information map is adopted to carry out real-time monitoring to the power quality monitoring system and the monitoring terminal, and the fault message is displayed; the real-time monitoring method comprises the following steps: starting, initialization, loading, running state detection of all servers of the power quality monitoring system, judging whether the running of the servers of the power quality monitoring system is normal, first temporary storage, running state detection of all the monitoring terminals, judging whether the running of the monitoring terminal is normal, second temporary storage, alarming and time delaying; the real-time monitoring method for the power quality monitoring system and the terminal running state can monitor the power quality monitoring system and the terminal monitoring, ensure to find problems timely and solve the problems timely, and ensure the integrity of the monitoring data.

The invention relates to a method for testing dynamic stiffness of a high-speed main shaft, which is high in testing precision and convenient to operate. The method comprises the radial loading step, the shaft center displacement measuring step and the dynamic stiffness value calculating step, when the radial loading step is performed, a readable loading element is used for pushing a rolling part to be in contact with the tested high-speed main shaft and enabling the direction of loading force to point to the shaft center of the tested high-speed main shaft, and the rolling part performs synchronous autorotation under the action of frictional force during the rotation of the tested high-speed main shaft. A device for testing the dynamic stiffness of the high-speed main shaft, which is simple in structure, small in occupied space, low in cost and high in precision, comprises a radial loading device and a shaft center displacement measuring device, wherein the radial loading device comprises the readable loading element, the rolling part and a fixed frame of the loading element, the loading element is fixed on the fixed frame of the loading element, the rolling part capable of performing the autorotation is assembled at the output end of the loading element, the rolling part is further in contact with the circumferential surface of the tested high-speed main shaft and the direction of the loading force of the loading element points to the shaft center of the tested high-speed main shaft.

Robotic rack loading apparatus and method include features and loading steps that provide essentially damage free rack loading of automotive panel assemblies into a specially designed rack. The rack includes dunnage elements containing sets of slots with lead-in upper edge angles and sensing holes associated with the slots. The robot carries a modified end of arm tool including a sensor to sense the location of a sensing hole to position a panel for loading into a corresponding set of slots. Another sensor preferably senses objects or structure in the rack to position the tool in a preload position. A compliant device allows lateral and longitudinal compliance of the end of arm tool to allow assemblies to be funneled into position in the slots without encountering damaging stress. A programmed robot can thus automatically load panel assemblies into the rack without damage.

There is disclosed a Java applet that causes a computer to execute plural predetermined Java applet programs. The Java applet is attached with an electronic signature for certifying an origin. The Java applet causes the computer to execute: an alteration detection step that detects alteration to deployment information, based on the identification information for detecting alteration to the deployment information defining respective locations of the plural predetermined Java applet programs; a load program startup step that starts a load program for loading the plural predetermined Java applet programs; and a load step that makes the started load program load the plural predetermined Java applet programs on the basis of the deployment information unless alteration is detected by the alteration detection step.

The invention discloses a weld seam fatigue life calculation method based on total strain energy density. The method mainly comprises the steps that 1, the weld-seam total strain energy density, a life function equation and a fatigue strength coefficient, a fatigue strength index, a cyclic strengthening coefficient and a cyclic strain hardening index which are needed by half-cycle life stress and a strain function equation are acquired through a welded joint fatigue test; 2, the weld seam structure is simulated through a shell unit module, the stress-strain response of the weld seam structure under the cyclic load action is calculated through a multi-load step method, and a stress-strain hysteretic curve is output; 3, the total strain energy density is calculated according to the stress-strain response, and the hot point fatigue life and a damage value of a weld toe of the weld seam are calculated by combining the energy density with the life function equation. According to the method, contribution of elastic-plastic stress and strain to the fatigue damage is comprehensively taken into account, scalar quantities are taken as damage parameters, the position and direction problems related to vectors are effectively avoided, the calculation precision is improved, and the time is saved.

A method for method for inhibiting thermal run-away in a multi-phase power converter at varying load transition rates. A multi-phase power converter having an on-time is provided and the frequency of the multi-phase power converter is adjusted so that a load step period and the on time of the multi-phase power converter are in a temporal relationship. Alternatively, a load step rate is inhibited from locking onto a phase current of the multi-phase power converter by suspending an oscillator signal. In accordance with another alternative, a load step rate is inhibited from locking onto a phase current of the multi-phase power converter by suspending an oscillator signal and dithering an input signal to the oscillator.

The invention relates to an experiment method and device for packer operating performance in oil field, testing contact stress and axial displacement of packer rubber tube through making pressurization, pressure stabilization and pressure removal on the experiment device to test the amplitudes and distribution rules of stress and strain of surface characteristic points of the packer parts under the action of external load. And the experiment method: applying pressure on the central pipe of the packer by electric pressure test pump according to the designed load step, setting the packer and keeping the pressure stable for a period of time and besides, testing the stress data on surface characteristic points of the rubber tube in this course; and finally removing the annulus pressure in the upper part of the packer, and then slowly removing the inner pressure in the central pipe and testing the stress data of the surface characteristic points in this course. And the experiment device: packer central pipe and upper and lower joints of the experiment sleeve are respectively connected with electric pressure test pump; the surface of the experiment sleeve is axially, spirally and equidistantly distributed with bores in the part measuring range, and pressure sensors are installed in the bores. And the invention has features of simple structure, high working reliability and higher sensitivity.

The invention provides a control method for dynamic configuration of an HTML template. The control method comprises the following steps: 1, acquiring an HTML code, and replacing an attribute to be set by a template label; 2, establishing a configuration attribute with a JSON structural file according to the template label in the step 1; 3, loading the configuration attribute set in the step 2, cyclically reading each element, performing interface drawing and binding relevant events; 4, in the process of attribute configuration selection, calling a relevant method in response to events bound to corresponding elements; 5, reading the template established in the step 1, matching corresponding contents, extracting the contents, and replacing corresponding values in the saved configuration attribute. A system applying the method comprises a code acquisition unit, a JSON configuration attribute unit, a reading unit, an event proxy server and an interface generator. The control method is easy for adding, operation of html and js is avoided, and a user unfamiliar with codes can configure a template and an attribute conveniently.

A system and method for generating modeling software for processing control, such as power plant control, cement plant or other industrial control application, using models such as expert systems, fuzzy logic, genetic optimization algorithms, and neural networks to convert sensor data into actionable data, information and / or diagnostics. The present invention includes a graphical programming environment, graphical programming tools, graphical user interface (GUI), visual feedback, real-time refresh, run-time object swap, logic standby (safety recovery), modeling and optimization to allows a user to create a control system for an industrial process, and that allows the user to change the process without any manual compile, assemble or load steps other than a save and refresh pushbutton.

The invention provides a bushing modeling method. The method includes: dividing parts of a bushing 3D (three-dimensional) model predefined, into finite element grids; determining material attributes of the finite element grids of the parts of the bushing 3D model, with the material attributes referring to density, Poisson's ratio and elastic modulus of materials of each part of the bushing; according to order, computing mode and load-step of output modality of a flexible body of the predefined bushing, computing the finite element grids to obtain frequencies and vibration modes of all orders of modality of the flexible body and also an animation file of the flexible body; converting the animation file of the flexible body into a modal neutral file, and importing the modal neutral file into motion simulation software of the flexible body, and establishing a bushing flexible body model. The bushing flexible body model acquired by the bushing modeling method can reflect isotropic stiffness coupling problems of the bushing, a bushing stiffness curve can be acquired with no need for testing, precision of the bushing flexible body model is improved, and testing time is saved.

There is disclosed a Java applet that causes a computer to execute plural predetermined Java applet programs. The Java applet is attached with an electronic signature for certifying an origin. The Java applet causes the computer to execute: an alteration detection step that detects alteration to deployment information, based on the identification information for detecting alteration to the deployment information defining respective locations of the plural predetermined Java applet programs; a load program startup step that starts a load program for loading the plural predetermined Java applet programs; and a load step that makes the started load program load the plural predetermined Java applet programs on the basis of the deployment information unless alteration is detected by the alteration detection step.

The invention discloses a stepped impedance resonator load-based stepped impedance ultra-wideband filter. The filter consists of a micro band substrate 11, a front part, a rear part and an input / output port; the front part comprises a first uniform transmission line unit (2), a second uniform transmission line unit (7), a first parallel coupling feeder line (3), a second parallel coupling feeder line (6), a stepped impedance resonator (4) and a loaded stepped impedance branch knot, which are interconnected; the rear part comprises a first defective ground unit (8), a second defective ground unit (9) and a grounding metal unit (12); the first defective ground unit (8) is positioned below the first parallel coupling feeder line (3), and the second defective ground unit (9) is positioned below the second parallel coupling feeder line (6); and the second input / output port (10) is connected with the grounding metal unit (12). The filter has compact structure and more excellent inner band and outer band performance.

The invention provides a method for analyzing residual stress of a polyethylene pipe welded joint. The method comprises the following steps: carrying out a unidirectional stretching experiment and a stress relaxation experiment to obtain a tangent modulus and a yield limit value of a base material sample and a stress loading function curve of the base material sample under unit strain; establishing a viscoelastic constitutive model based on a generalized Maxwell equation and Pluronic series, and fitting the curve by adopting the model to obtain parameters of the model; establishing a basic material database of the polyethylene material according to the parameters, the thermophysical parameters and the thermodynamic parameters; establishing a geometric model, dividing grids, inputting thermal boundary conditions and force boundary conditions of each welding stage, and setting load steps and convergence parameters to obtain instantaneous temperature field data; and taking the instantaneous temperature field data as a preheating load, and adjusting input parameters by adopting a sequential coupling method to obtain the distribution condition of the residual stress. According to the method for analyzing residual stress of a polyethylene pipe welded joint, nondestructive analysis of the residual stress of the joint after the welding process is accurately and quickly realized.

The invention discloses a simulation modeling method of a wheel rim, belonging to the technical field of computer-aided engineering, comprising the steps of establishing a preliminary model of the wheel rim; the initial model of the rim is simplified and the loading area of radial force is cut on the rim body and the retaining ring respectively under the radial load condition. The contact relationship between the mating surfaces in the rim model is established. The contact relationship between rim and hub mating surface is established. A second-order tetrahedral element is used for mesh generation. Bolt pre-tightening force is applied: setting two load steps, setting the magnitude of the pre-tightening force in the first load step, and setting the magnitude of the pre-tightening force in the second load step as lock; boundary conditions are applied: in the second loading step, the constraint and force of radial load or bending load are applied in the corresponding area, and the finiteelement model of the rim assembly is established. In the process of rim modeling, the pre-tightening force of the rim, hub and hub mounting bolt is taken into account, which makes the finite element model of rim assembly more consistent with the actual situation and the analysis results more accurate and reliable.

The invention discloses a control method of local loading and shaping equiaxial alpha content of titanium alloy. After a blank is changed to forge and is pre-shaped, a shaped forging piece is obtained by isothermal local loading and shaping, finishing and heat treating. Local loading is finished by two passes, and each pass is finished by two loading steps. A mould is divided into two to three modules, and the relative position of different modules can be adjusted. In each loading step in the same pass, different modules are used for carrying out deforming on the blank; after all loading steps in the pass are finished, the next step is started, the loading method in the last step is repeated to finish the forging piece deformation; the equiaxial alpha phase volume fraction effectively controlling the local loading and shaping of the forging piece is obtained, and is controlled within 10-20%; the equiaxial alpha phase volume fraction of different positions on the forging piece differs within 5%; equiaxial alpha crystal and beta crystal are both even and small, have no phenomena of coarsing, unevenness and extraordinary growth, and have favourable mechanical property.

The invention discloses a self-adaptive transient response optimization circuit suitable for a peak current mode DC-DC converter, and belongs to the technical field of electronic circuits. The circuit adaptively adjusts and controls the magnitude and direction of an output transient enhanced current signal according to the actual conditions of a feedback voltage and a reference voltage of the DC converter, enables a generated current signal to be superposed with an inductive current sampling signal and a slope compensation signal, and converts the signal into a voltage signal through a resistor, and then inputs the voltage signal to the positive input end of a PWM comparator, so that the adjustment speed of an original system loop in a load step is increased from the perspective of a large signal, and the transient response of the system is optimized. Compared with a traditional transient response optimization circuit, the circuit can adaptively provide the transient enhanced current signal related to the output voltage change, has the characteristics of low noise and higher system stability, and can improve the transient response speed of the system effectively.

The invention relates to a civil engineering structure reliability evolution and residual life prediction method. The method comprises the following steps of: firstly, judging possible control sections of a structure according to numerical value analysis or mechanical knowledges; secondly, assuming distribution obeyed by each parameter through a statistical result of initial design information, and then calculating probability distribution obeyed by resistance and load of the structure; calculating a rigidity attenuation coefficient D (i) under the influences of the load, shrinkage and creep; furthermore, updating a resistance distribution function of the structure to obtain resistance probability distribution at the moment and obtain a reliability-load curvilinear relationship; establishing a reliability-time curve and predicting residual service life of the structure after undergoing load steps; and finally, combining actually measured information to continuously updating the residual life prediction result, and taking a shortest life value of each control section as the residual service life of the whole structure.

The invention discloses a paperless loan approval system and method for commercial banks; the system comprises: a loan approval system module for processing load steps; a loan primary examination module connected with the loan approval system module for submitting loan applications and primarily examining loans; a loan approval module for examining loan requests that pass the primary examination;a loan extension module for providing further approval and extension of loans; a system manager module for managing and maintaining the system; related function modules for managing related list information of the loans. The paperless loan approval system and method for commercial banks have the advantages that loan businesses are handled online, so that time is saved for loan borrowing personnel;the multi-step approval ensures safety of a loan; the system provides a user with whole-process informationized intelligent management in terms of loan business process management, supervision management, customer management, post-borrowing management, statistical management and the like.

The present invention discloses an end-on-fire multi-beam dual-circularly polarized antenna array having broad application prospects and having dielectric-loaded stepped slots, By designing a broadband dual-circularly polarized antenna unit, an antenna feeding network and an air slot between the antenna units for lifting and isolating, the end-emitting multi-beam dual-circularly polarized antennaarray of the invention obtains the advantages of being applicable to the microwave and millimeter wave frequency band, easy to design and process, easy for plane integration, high bandwidth, capable of realizing end-on-fire multi-beam dual-circularly polarization and the like.

The invention relates to a method for directly testing speed diversity factor and stagnant rate of a turbine electro-hydraulic control system, which adopts a direct testing mode to improve testing accuracy, simplify testing process and reduce operation difficulty. The method comprises the following steps: 1) determining a detecting point of load; 2) ensuring main steam pressure, temperature and vacuum of a turbine set to be rated values and keeping stable; 3) taking the set value of rotating speed of the turbine set in case of step change as a first record, reducing gradually load by adjusting the opening degree of a governing valve and recording test data until reaching empty load on the premise of keeping stable parameters of the turbine set; 4) increasing the load step by step in the same sequence until reaching full load and recording the corresponding data; 5) obtaining the relation curve of N-delta and N-epsilon for a steam turbine generator unit; 6) inspecting whether the parameters of the speed diversity factor and the stagnant rate of the turbine set meet the requirement of speed governing characteristics of the turbine in accordance with the relation curve of N-delta and N-epsilon; and 7) amending the flow compensated curve of the valve or the overlapping degree curve of the valve in accordance with the N-delta relation curve.

A synchronous buck converter having an improved transient response during output current includes a first switching transistor connected between an input node and a first node, a second switching transistor connected between the first node and a second node, a series inductor connected between the first node and an output node, an output capacitor connected between the output node and the second node, a first driver circuit operative to turn the first switching transistor one and off according to a variable duty cycle determined by an error signal representing the difference between the voltage output of the converter and a reference voltage, a sensing circuit operative to provide a control signal output when the duty cycle for the first switching transistor is zero, a second drive circuit responsive to the control signal output of the sensing circuit to turn off the second switching transistor and a second sensing circuit operative to provide a second control signal when a dissipating current of the inductor is zero, wherein the second drive circuit is responsive to the second control signal to turn the second switching transistor on when the dissipating current of the inductor is zero.

The invention is applicable to the data processing field and provides a method and device for loading business documents and a mobile terminal. The method comprises the following steps of: receiving business document loading request information, wherein the request information comprises a unique identifier which corresponds to an interface element of the business document loading; judging whether the corresponding interface element in the business document loading exists in a cache according to the unique identifier; directly loading the interface element when the corresponding interface element in the business document loading exists in the cache; receiving a business data object packet sent by a server and analyzing the business data object packet; and binding the analyzed data and the corresponding interface element to realize the loading of business documents. According to the invention, the corresponding interface element in the business document loading and the business data are loaded step by step and the corresponding interface element in the business document loading is stored in the cache of a client, so that the processing pressure of the server is relieved and the speed of loading of the business documents is effectively improved.

The invention provides an access control method and device for solving the problem that an RBAC (role-based access control) model cannot meet the flexibility requirement on the access control of resources. The method comprises the following steps: an access configuration file presetting step comprising mapping the business function to be access, service and service packet in the access configuration file; an access configuration file loading step comprising mapping the access, service and service packet in the access configuration file to be access memory model data; an access judging step comprising receiving the user request and judging whether to access the user request by use of the access memory model data. Totally different from the existing RBAC model, the network resource can be directly defined flexibly based on the business, and the resource (business packet) can be packed to authorize to a user of the network, every time the user issues a request, whether the user can access to the requested resource can be determined efficiently.

The invention discloses a field immediate calibration method for earth pressure cells. The technical scheme is as follows: when calibration is conducted, a computer, data connecting wires, a stain acquisition instrument, a sandbox, a bearing plate, a plurality of weights and earth pressure cells to be calibrated are brought to a field with earth pressure that needs to be calibrated, the earth pressure cells are buried in the center of the sandbox through undisturbed soil and connected with the strain acquisition instrument, the surface of the sandbox is flattened by the undisturbed soil in the field and is covered by the bearing plate, the bearing plate is loaded step by step, micro strain values are acquired by the strain acquisition instrument every time, acquired micro strain values and corresponding loading values are inputted to the computer, the computer adopts a regression formula for fitting a straight line, and the accurate relation between the strain and the stress of the earth pressure cells is finally obtained. According to the invention, the computer is adopted for data processing, and the quantitative relation between an input quantity and an output quantity can be obtained intuitively and rapidly; when the calibration is completed, the earth pressure can be measured by calibrated earth pressure cells, so that the calibration is convenient and accurate.