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 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 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.

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.

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.

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 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 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 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 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.