414 results about "Superposition principle" patented technology

A method of force estimation for a minimally invasive medical system comprising a robot manipulator (10). The manipulator has an effector unit (12) equipped with a 6-degrees-of-freedom (DOF) force / torque sensor and is configured to hold a minimally invasive instrument (14) having a first end (16) mounted to the effector unit and a second end (20) located beyond an external fulcrum (23) that limits the instrument in motion, usually to 4 DOF. The method comprising the steps: —determining a position of the instrument relative to the fulcrum; —measuring by means of the 6-DOF force / torque sensor a force and a torque exerted onto the effector unit by the first end of the instrument; and —calculating by means of the principle of superposition an estimate of a force exerted onto the second end of the instrument based on the determined position, the measured force and the measured torque.

Method for analysis of hydrocarbon potential of subterranean regions by generating surfaces or geobodies and analyzing them for hydrocarbon indications. Reflection-based surfaces may be automatically created in a topologically consistent manner where individual surfaces do not overlap themselves and sets of multiple surfaces are consistent with stratigraphic superposition principles. Initial surfaces are picked from the seismic data (41), then broken into smaller parts (“patches”) that are predominantly topologically consistent (42), whereupon neighboring patches are merged in a topologically consistent way (43) to form a set of surfaces that are extensive and consistent (“skeleton”). Surfaces or geobodies thus extracted may be automatically analyzed and rated (214) based on a selected measure (213) such as one or more direct hydrocarbon indications (“DHI”), e.g. AVO classification. Topological consistency for one or more surfaces may be defined as no self overlap plus local and global consistency among multiple surfaces (52).

Method for analysis of hydrocarbon potential of subterranean regions by generating surfaces or geobodies and analyzing them for hydrocarbon indications. Reflection-based surfaces may be automatically created in a topologically consistent manner where individual surfaces do not overlap themselves and sets of multiple surfaces are consistent with stratigraphic superposition principles. Initial surfaces are picked from the seismic data (41), then broken into smaller parts (“patches”) that are predominantly topologically consistent (42), whereupon neighboring patches are merged in a topologically consistent way (43) to form a set of surfaces that are extensive and consistent (“skeleton”). Surfaces or geobodies thus extracted may be automatically analyzed and rated (214) based on a selected measure (213) such as AVO classification or one or more other direct hydrocarbon indicators (“DHI”). Topological consistency for one or more surfaces may be defined as no self overlap plus local and global consistency among multiple surfaces (52).

The invention provides a method for caculating displacement of a nearby existing subway tunnel due to foundation pit excavation. The method specifically comprises the following steps of establishing a calculation model first, performing unloading analysis on the pit bottom, then performing unloading analysis on the side walls of a foundation pit, and finally, obtaining the horizontal total displacement Sx and the vertical total displacement Sz, which are caused by unloading stress generated by the pit bottom and surrounding side walls of the foundation pit, of a certain point (x1, y1, z1) on the outer side of the tunnel by utilizing a superposition principle; in order to accurately calculate the outside displacement of the tunnel under the action of loads of the pit bottom and surrounding side walls of the foundation pit, the half-side tunnel towards the foundation pit is uniformly divided into a plurality of points, displacement values of the plurality of points are respectively calculated, and finally, an average displacement value is used as the displacement value of the tunnel.Therefore, the construction of a specific project can be simulated by using the method before construction so as to calculate the displacement of the subway tunnel in specified working conditions, and if the displacement of the tunnel exceeds a corresponding allowable value, related construction parameters can be adjusted for trial computation till reaching safety standards.

The invention provides a blasting vibration predicting method, which comprises the following steps of: firstly, determining a reference blasting hole and a plurality of vibration measuring points, and placing vibration meters on each vibration measuring point; blasting the reference blasting hole to obtain blasting vibration waveforms having different distance points; and finally, executing a blasting vibration waveform predicting process. In the prediction process, actual blasting vibration test data is obtained firstly, the blasting vibration waveforms and migration stacked delay time of each blast hole on a predicting target point are then calculated according to distance from the predicting target point to the each blast hole and the reference blasting hole, and the vibration waveform of the predicting target point can be obtained based on a vibration wave stacking principle. A blasting vibration predicting result which is obtained by adoption of the method really shows an influence of a topographic condition of a field on blasting vibration, and the integral vibration waveform of the predicting target point can be obtained; a predicted vibration velocity peak value of waveform particles is quite approximate to an actually-measured vibration velocity peak value, and a time difference between the predicted vibration velocity peak value and the actually-measured vibration velocity peak value is also quite small; and an analysis result is accurate and reliable, so that adjustment of a blasting scheme can be better guided.

The invention discloses a big-power test programmable resonance wave voltage source which is based on superposition principle, the resonance wave voltage source includes three phase commutating bridge, dc-to-ac converter, transformer in series, three phase resistance-capacitance loop and current track control circuit, the three phase commutating bridge is connected with the electricity net via inlet inductance and three switch; the structure of the dc-to-ac converter is three single-phase H bridges, each of which composes four switching tubes IGBT, the big-power test programmable resonance wave voltage source which is based on superposition principle adopts principle of separating base wave and resonance wave, the electricity provides the voltage of base wave, voltage of resonance wave is provided by the resonance wave voltage source, they are combined to make tested equipment get required voltage wave, the resonance wave is generated by controlling the dc-to-ac converter, the control mode can decreases the current in the dc-to-ac converter, and increases the capability of system, it can replace the programmable power source under most conditions.

The invention relates to a frangibility index method for evaluating seam floor water inrush, which comprises the following steps: determining main control factors of the seam floor water inrush by taking GIS as an operating platform based on a multi-source information fusion theory, and establishing a sub-subject layer diagram for each main control factor through data acquisition, analysis and processing; determining the 'contribution' or the 'weight' of each main control factor to a complex water inrush process and establishing a forecast evaluation model for the seam floor water inrush through the inversion identification or the learning training of the model by applying a multi-source geoscience data composite superposition principle and adopting a modern linear or non-linear mathematical method; and reasonably determining a subarea threshold value of the water inrush frangibility according to the analysis of a frequency histogram of water inrush frangibility indexes calculated by each unit in a research area and finally making a scientific division and a forecast evaluation on the seam floor water inrush frangibility. The method well overcomes the difficulty of the forecast evaluation on the seam floor water inrush, breaks through the restriction by significant deficiencies that the conventional water inrush coefficient method for the seam floor water inrush evaluation can only consider two control factors and has no influence 'weight' concept and the like, and adopts the GIS and the modern non-linear mathematical coupling method to truly depict the non-linear dynamic process of the seam floor water inrush which is controlled by a plurality of factors and has a very complicated formation mechanism.

A method for measuring a three-dimensional power-frequency electric field on basis of curve integral of equivalent charges on surfaces of transmission conductors includes acquiring relevant parameters of intensity of the three-dimensional power-frequency electric field of a transmission line at first; then building a three-dimensional model for the transmission line hung at different altitudes on the basis of a conductor catenary equation; determining the actual height of the corresponding conductor located at an optional position of the transmission line within a span; further obtaining the equivalent charges on the surface of the corresponding conductor located at the optional position of the transmission line within the span by a curve integral method for the equivalent charges on the surfaces of the conductors of the transmission line hung at the different altitudes; and finally, computing the intensity distribution condition of a space electric field generated by a multi-conductor system according to a field intensity superposition principle when the conductors at two ends of the span have different altitudes. By the aid of the method, an actual spatial erection condition of the high-voltage power line can be truly reflected, and the method is favorable for accurately computing the intensity of the three-dimensional space electric field of the high-voltage transmission line, and provides a reliable basis for evaluating an electromagnetic environment of the transmission line.

A superposition principle of waveform based on conceptions of waveform continuity and flexible regulation of voltage proposes three concepts, respectively being flexible AC transformation, flexible power transmission and transformation and flexible voltage regulation; proposes three new technologies, respectively being a transient impedance technology, a flexible stepless voltage regulation technology and a flexible stepped voltage regulation technology; proposes three new products, being an AC voltage regulating electronic switch, a transient impedance transformer and a high-speed voltage regulating transformer; proposes six high-voltage power grid connection methods, being a power grid connection method type of a transient impedance transformer, a power grid connection method of a transient impedance step up auto transformer and the like; and proposes a new reactive compensation connection method for a reactive compensation device.

The invention provides a load forecasting method of a power distribution network with a distributed power supply. The distributed power supply comprises a wind generator set and a photovoltaic power generation system. The load forecasting method of the power distribution network includes the following steps that load forecasting information is collected; a load year characteristic curve of a planning region is forecasted, a year power output characteristic curve of the distributed power supply is forecasted; a year load characteristic curve of the power distribution network with the distributed power supply is forecasted. According to the load forecasting method, random characteristics of power output of the distributed power supply are considered, a year power output curve of the distributed power supply is simulated through Monte Carlo simulation, a total load characteristic curve of the power distribution network is obtained on the basis of different load forecasting, and finally a net load year characteristic curve of the power distribution network is obtained by synthesizing total load characteristics and distributed power supply power output characteristics and based on the time characteristic stacking principle. Thus, the load forecasting problem of the power distribution network with the distributed power supply can be well solved.

The invention discloses a fault-tolerant-vector-control-based third harmonic current injection method of a five-phase permanent-magnet motor. The method comprises: a fundamental wave decoupling model under various open-circuit faults of a five-phase permanent-magnet motor is established and a corresponding fundamental fault-tolerant current is deduced; according to a magnetic resonance method, a torque mathematical model under the fundamental fault-tolerant current is established; on the basis of the established torque model, an expression of third harmonic current injection under various open-circuit faults is deduced; on the basis of a superposition principle, the fundamental current is added to the third harmonic current to obtain a total fault-tolerant current; and with corresponding deflation clark and park transform, a current component under a rotation orthogonal coordinate system is obtained, so that third harmonic current injection under magnetic field orientation control and fault-tolerant vector control under faults is realized. Therefore, on-line calculation of the third harmonic current under fault-tolerant vector control and injection of the third harmonic current at a fixed switching frequency are realized; the torque ripple is suppressed and the system robustness is enhanced; and the switching loss and the electromagnetic interference are reduced.

An array antenna pattern time domain measurement method belongs to the technical field of antennas, and comprises the following steps: measuring the patterns of array antenna units firstly, irradiating the array units from different angles (theta and Phi) by uniform plane waves, measuring the transient state responses of the array units under the irradiation of the plane waves by a digital oscilloscope, normalizing the transient state responses to obtain patterns of the array units under the conditions of uniform amplitude and cophase excitation, and synthesizing the array pattern through adopting a digital signal processing technology and a superposition principle of the patterns of the array antenna unit finally. The array antenna pattern time domain measurement method has the advantages that (1) the array pattern is beneficial for the precise synthesis under the array circumstance; (2) the patterns of the array units under the random given excitation can be measured; and (3) the array scanning grain pattern can be synthesized so as to be more beneficial for obtaining the maximum gain distribution area and the scanning blind point distribution area. The array antenna pattern time domain measurement method has the characteristics of simplicity in operation and high testing efficiency, and reduces the site requirement and the testing cost at the same time.

The invention belongs to the technical field of shale gas development, and particularly relates to a segmentation multi-cluster fractured horizontal well yield prediction method for a shale gas reservoir. The method comprises the following steps that: establishing a physical model; obtaining an apparent permeability rate calculation method; according to the permeability rule and the pressure superposition principle of gas in a stratum, obtaining the overall pressure drop and crack grid traffic relational expression of all crack grid traffics for any point in a gas reservoir; according to the flowing relationship of gas in a crack and a boundary coupling relationship between the crack and the strum, obtaining a gas reservoir-crack coupling flowing equation; and adopting a matrix analysis method and a numerical iteration algorithm to obtain the horizontal well yield. By use of the method which is put forward by the invention, a blank of a segmentation multi-cluster fractured horizontal well yield prediction model which considers the complex and multiple migration mechanism is filled. The method has the characteristics of being convenient in calculation, high in operability, effectiveand practical, and a basis can be provided for optimizing the horizontal well segmentation multi-cluster fractured parameters of the shale gas.

The invention relates to a split design method for the thickness of an automoible leaf spring, belonging to the field of an automobile suspension spring. The performance of the suspension is influenced directly by the thickness of each strip of the automobile suspension leaf spring; however, an accurate and reliable design method is not available currently. According to the method provided by the invention, the total equivalent thickness of the leaf spring is designed according to the requirement for the suspension to the spring stiffness, then the split design is carried out on the equivalent thickness of the leaf spring with a superposition principle, thereby obtaining the thickness of the leaf spring with unequal length for each strip. The split design method for the thickness of the automobile leaf spring provided by the invention is simple and reliable, and can satisfy the requirement for the accurate design of the thickness of the automobile leaf spring. The split design method can be used for designing vehicle suspension leaf springs.

The invention discloses an array antenna channel calibration system for a plane wave simulator, which comprises a plane wave simulator array antenna comprising multiple sub units, a regulating networkfor controlling the amplitude and the phase of each sub unit, a calibration probe antenna or probe array with a fixed and known position, a vector network analyzer, a connector cable and other accessories. The calibration system adopts a vector superposition principle, through control on the phase of the tested array antenna channel, in a far field area of the antenna from the two-dimensional array antenna aperture unit channel, a transmission coefficient (S21) value when the phase of the tested array antenna channel changes is acquired, and thus, the channel amplitude and phase difference isanalyzed. The channel calibration system has a wide application range and can be used for consistency calibration on the unit channels of the array antenna, especially for the unit channel calibration of the planar wave generator array antenna.

The present invention belongs to the field of electromagnetic value computing, and particularly relates to a rapid and accurate analysis method for large-scale MIMO array antenna far-field radiation. The method comprises: determining a structural parameter of an M*N-element plane array antenna; computing a relationship between an incident field and a scattered field of an element antenna; according to mutual coupling characteristics among element antennas, selecting a sub-array form and size of an extraction unit on an array environment condition; for an antenna sub-array of the extraction unit, computing a unit far-field radiation pattern of the sub-array; and according to the unit far-field radiation patterns of the array and a superposition principle, computing an array antenna far-field radiation pattern. According to the invention, by utilizing the accuracy of mutual coupling computation, the problems that the use of such methods as the moment method, the finite element method and the finite difference time domain (FDTD) method are limited by computing capacity of a single computer, and when the scale of the array antenna is too large, rapid and accurate computation of the antenna radiation field cannot be implemented with a full wave simulation method because of large consumption of memory and computing time, are effectively solved. The method provided by the invention is capable of analyzing the radiation pattern of a large and conformal array antenna, and has higher synthesizing accuracy and higher analysis speed.

The invention belongs to the technical field of microwave linearization, and particularly relates to an amplitude and phase tunable type pre-distortion linearizer. According to the pre-distortion linearizer, based on the diode pre-distortion linearization working mechanism, by means of the vector superposition principle, pre-distortion nonlinear compensation with different amplitude and phase requirements is obtained through phase change, and the defect of traditional series-connection and parallel-connection transmission type simulation pre-distortion circuits that only pre-distortion signals suitable for solid-state power amplifiers can be generated and the defect of reflection type pre-distortion circuits that only pre-distortion signals suitable for microwave traveling-wave tube power amplifiers can be generated mostly are overcome; meanwhile, the capacity of control, over the amplitude expansion and phase expansion degrees of generated non-linear signals, of a microwave pre-distortion circuit is improved, and accurate strong-nonlinearity amplitude and phase compensation can be achieved.

The invention discloses a method for establishing an earthquake response mode based on a fracture equivalent medium model, which belongs to the field of exploration geophysics. The method is characterized by comprising the following steps of: determining a relationship between fracture characteristic parameters and equivalent medium elastic parameters by quantificationally applying a fracture equivalent medium theory, establishing a constitution relation of a fracture network anisotropic equivalent medium model based on a Bond conversion and superposition principle, and placing the constructed fracture network equivalent medium model in an actual space position of strata, and establishing an actual stratigraphic fracture equivalent medium model; and establishing an earthquake response model of different tectonic positions and different lithologic fractured reservoirs by use of an earthquake wave field numerical simulation method. The method for establishing the fractured reservoir earthquake response mode based on the fracture equivalent medium model has strong practicability, and provides the basis for identifying the fractured reservoir from the prestack earthquake data.

The invention discloses an orbital angular momentum plane spiral phase plate based on a phase shift surface. Based on the multilayered medium phase shift surface principle, multiple phase shift units are designed to synthesize a plane lens so that the spiral phase plate can be formed, and meanwhile one-order orbital angular momentum wave beams are generated and focused; each phase shift unit comprises multiple medium layers and metal layers, wherein the medium layers and the metal layers are alternately arranged; the metal layers are divided into intermediate metal layers and patch layers, the intermediate metal layers and the medium layers are the same in size, and slits are formed right in the middle; the multiple different phase shift units form a spiral array, specifically, phase compensation of the plane lens for spherical waves and phase shift of the spiral phase plate are superposed based on the phase superposition principle, and the spiral phase plate with the orbital angular momentum wave beam converging function is obtained. The plane spiral phase plate manufactured in a printed circuit board mode is small in size, low in weight and cost, simple in preparation process and free of complex antenna structures.

The invention provides a closed mast strength measurement method and a special measurement device. Stress and displacement response of the mast are measured by using a sucking disc spring scale loading device; response of the mast is measured by using a sensor bracket loading device; test values loaded on sides of the mast are accumulated in accordance with linear superposition principle in order to result in the test value under the action of all the loads, therefore, a mast model test is realized. On the basis of linear superposition principle, the invention, aiming at force-bearing features of the closed mast in the wind, provides a method in which the sides are loaded respectively to implement the model test. The invention, according to the feature that tension and pressure are jointly applied on the mast in the wind, provides the sucking disc spring scale loading system and the sensor bracket loading system to simulate the wind force that is applied to the mast; such two systems can realize surface tension loading and surface pressure loading of a complex structure. The invention solves the difficulty that non-wind tunnel test of mast scaled model test cannot be implemented, and offers an ideal alternative proposal for the design and the test of the closed mast.

The invention discloses a Raman spectrum superposition-based method for quickly determining the content of methanol in methanol gasoline. The Raman spectrum superposition-based method comprises the following steps of: firstly, measuring a base oil spectrum, a pure methanol spectrum and a methanol gasoline spectrum with known methanol content; secondly, obtaining a spectrum superposing formula according to data and storing base oil and a corresponding spectrum superposition parameter in a spectrum database; and constructing the spectrum database and then estimating the content of the methanol from the methanol gasoline spectrum with the unknown methanol content by using the spectrum superposition formula. The invention provides the spectrum superposition formula from a view of spectrum soft processing as well as the formula-based method for quickly determining the content of the methanol in the methanol gasoline. According to the method, the quantity of samples required to be calibrated can be greatly reduced in the application process, the labor capacity of calibrating works is reduced and the problem that the measurement for low-content methanol is inaccurate or even cannot be measured in the traditional method is overcome; and in addition, the measurement precision of the unknown methanol gasoline prepared from the base oil can also be maintained.

The invention relates to a system and a method for testing lens parameters based on a Hartmann-Shark sensor. The method comprises the following steps of: by injecting a reference beam to a tested lens, detecting a light wave front which is emitted from a tested lens by using a wave-front sensor; reconstructing the light wave front; calculating a convergence / radiation center of the light wave front, thereby obtaining the positions of the focus length, a focal point and a principal plane of a positive / negative lens; obtaining the positions of the focus length, the focal point and the principal plane in different wavelengths by using different wavelengths of incident lights enter the tested lens; carrying out wave front analysis on the reconstructed and reduced wave front; according to a wave front superposition principle, expanding the tested wave front into a superposition mode of an aberration element by using a least square method, wherein each aberration element corresponds to a weight factor in a certain size; and obtaining lens aberration distribution condition by discussing the distribution of the weight factors. The invention can completely inspect focus length parameters and aberration quality of the lens, is combined with an adjustable-wavelength laser, can measure chromatic aberration and inspects the change condition of the lens focus length and the aberration distribution under different wavelength conditions.

The invention relates to a new rock mass damage constitutive model construction method, comprising the following steps: step S10: based on strain equivalence principle, adding a bearing capacity coefficient of a damaged material to obtain a modified rock damage constitutive model; Step S20, respectively calculating a macro damage tensor of the joint and a micro damage variable of the micro crack,and establishing a mechanical model of the macro damage and the micro damage of the joint rock according to the superposition principle; Step S30: According to the damage mechanics theory, constructinga rock mass damage constitutive model with coupling of macroscopic defects and microscopic defects. The novel rock mass damage constitutive model construction method and device provided by the invention provide a simple principle, The damage constitutive model of rock mass, which is easy to operate and low in cost, is reasonable and reliable considering the coupling of macroscopic and microscopicdefects. The mining range can be delineated accurately and reasonably by using the damage constitutive model in the design of excavation slope engineering.

The invention relates to a modeling method for a color register system in the electronic shaft gravure printing machine acceleration process. The modeling method comprises the following steps that (1) error open-loop data of the color register system in the electronic shaft gravure printing machine acceleration process are collected; (2) filtering processing is carried out on the collected error open-loop data, so that a mathematical model of the color register system in the electronic shaft gravure printing machine constant-speed process is obtained; (3) the error open-loop data generated by the color register system of an electronic shaft gravure printing machine in the acceleration process are regarded as knowable disturbance, the mathematical model of the color register system in the electronic shaft gravure printing machine constant-speed process is corrected according to the principle of linear superposition, and therefore a dynamic model of the color register system in the electronic shaft gravure printing machine acceleration process is obtained. According to the modeling method for the color register system in the electronic shaft gravure printing machine acceleration process, obtaining of good control performance serves as the purpose, and the obtained model can eliminate inconsistency of all units in an actual system.

The invention provides a voltage dip source positioning method based on the disturbance power direction and belongs to automatic monitoring methods for power grid voltage dip source positioning. The method is characterized in that under the effect that a disturbance voltage in a power grid fault process is obtained according to the superposition principle of linear circuits, the direction of an active disturbance power flow is used for accurately positioning a voltage dip source; when active disturbance power is positive, a disturbance source is located at the upstream portion of a monitoring point; when the active disturbance power is negative, the disturbance source is located at the downstream portion of the monitoring point; an algorithm of the corresponding disturbance power is given. The voltage dip source positioning method can be used for certainly positioning voltage dips caused by various power grid faults, is suitable for radiation type or ring type or single-circuit type or two-circuit type or single-power-supply type or multi-power-supply type grid structure power grids, and is also suitable for voltage dip source positioning caused by capacitor switching, transformer switching and large motor starting disturbance; according to the voltage dip source positioning method, the voltage and current of the monitoring point need to be sampled synchronously.

The invention provides a thermal expansion error modeling and compensating method for a semi-closed-loop feed shaft under the excitation of a multi-time-varying dynamic heat source and belongs to the field of numerical control machine tool error compensation. The generation mechanism of heat by friction, the heat conduction mechanism and the heat convection mechanism, under the excitation of a multi-temporal and variation-dynamic heat source, are analyzed. According to the superposition principle of the temperature field, a temperature field prediction model under the excitation of a nut pair time-varying dynamic heat source and a temperature field prediction model under the excitation of a bearing seat time-varying dynamic heat source are respectively established. Through integrating a discrete screw temperature field at any time, the predicted value of the real-time thermal expansion error of a screw can be obtained. The predicted value of the thermal expansion error of the screw is written into a numerical control system in real time, and then the thermal error of a feed shaft can be compensated. The above model records the dynamic change process of the discrete temperature field of the feed shaft, namely the change of the motion state of the feed shaft. Meanwhile, the good compensation effect is still realized. The above method is high in prediction accuracy, and is strong in robustness for the change of the motion state.

The invention relates to a hernia patch solid-supported with antibiotics and a preparation method. The antibiotic hernia patch solid-supported with drug-loaded microspheres comprises drug-loaded microspheres, a patch, and a supporting agent. The sandwich-type antibiotic hernia patch comprises a patch layer, a drug layer, and a film layer. The antibiotic hernia patch solid-supported with drug-loaded microspheres is prepared by solid-supporting the drug-loaded microspheres onto the surface of the patch material by the supporting agent. The drug-loaded microspheres are loaded with water-soluble drugs by a solvent evaporation method. The sandwich-type antibiotic hernia patch is prepared by sandwiching the drug layer between the patch layer and the film layer through a layer-by-layer superposition principle. The antibiotic hernia patch of the invention has a simple and practical preparation method, is suitable for different clinical medication requirements, has obvious slow release performance, has significant antibiotic effect in rats, solves the problem of acute and delayed infection after herniorrhaphy, has good market prospects, and is worthy of popularization and utilization.