36results about How to "Efficient design method" patented technology

A method for designing decouple controller analysis of multivariable time lag system includes carrying on identification of transfer function matrix for chemical industrial multivariable time lag procedure, designing two regulation factors being able to be realized by controller and designing decouple controller, leading designed controller to be infinite high order if GO ( s ) still contains time lag item after object transfer function matrix is decomposed, applying controller order ¿C decreasing technique to carry out order ¿C decreasing on controller.

The present invention discloses a single-layer vibration isolation system design method for power equipment. The method comprises the following steps: testing a vibration property of a vibration source of power equipment so as to acquire an excitation frequency and a vibration isolation performance parameter of the vibration source; acquiring an inertial parameter of the power equipment; determining the number of vibration insulators and a constraint condition in a single-layer vibration isolation system; establishing an optimization objective function of a vibration isolation rate and a comprehensive decoupling rate; and establishing a multi-body dynamics model and optimizing calculation of a single-layer vibration isolation system design by using a particle swarm optimization algorithm. According to the single-layer vibration isolation system design method for power equipment provided by the present invention, the two design objectives, the vibration isolation rate and the decoupling rate, are both considered, so that with the vibration isolation rate being ensured, a coupling effect of a rigid body mode of each order is effectively lowered. The vibration isolation performance of a vibration isolation system can be truly improved. No repeated commissioning is required in the design process; an acquired design parameter is of an optimal value; an effect evaluation parameter will definitely meet the requirement of specifications; and a design result is accurate and highly efficient.

The invention discloses a simulated electromagnetic disturbance source for an isolating switch. The simulated electromagnetic disturbance source comprises a testing transformer, a capacitive divider, an adjustable grounding capacitor, a power supply side analog capacitor, a vacuum circuit breaker switch, a discharging sphere gap and a load side analog capacitor. The original side of the testing transformer is connected with a power supply, and the auxiliary side is serially connected with the capacitive divider. The power supply side analog capacitor is parallelly connected with the capacitive divider. The anode of the power supply side analog capacitor is successively connected with the vacuum circuit breaker switch, the discharging sphere gap, the load side analog capacitor and a grounding capacitor in series. The cathode of the power supply side analog capacitor is grounded. The simulated electromagnetic disturbance source can truly simulate an electromagnetic disturbance process and a ground potential increase process in a switching-on process and a switching-off process of the isolating switch and can output a 1.1MHz high-strength electromagnetic field. Furthermore the simulated electromagnetic disturbance source for the isolating switch has advantages of convenient assembling, simple operation, high testing safety and high precision.

The invention discloses a 100kA lightning current generator for testing the impulse characteristics of a grounding device. The 100kA lightning current generator is characterized by comprising a generator, a direct-current charger and a surge generator body; an output end of the generator is connected with an input end of the direct-current charger, and an output end of the direct-current charger is connected with an input end of the surge generator body. The 100kA lightning current generator is a lightning current generator which can output a highest voltage of 1200kV, a lightning current peak of 100kA and a waveform of 8 / 20 microseconds or 2 / 1microseconds under the condition of a load greater than 5 omega. The 100kA lightning current generator can be applied to the testing of surge impedance of the grounding device, the research of a soil spark discharge phenomenon, high-current withstanding impulse experiments of grounding materials, electromagnetic compatibility experiments and other aspects, and can increase the precision and accuracy of the technical application.

The invention discloses a complex network synchronization control method under aperiodic DoS attack, and the method comprises the steps: firstly building a complex network system model and a synchronous error model, introducing an event triggering mechanism, building a network attack model based on the influence of the aperiodic DoS attack on network transmission data; designing a synchronization error model of the complex network under a non-periodic DoS attack and event triggering mechanism; utilizing a Lyapunov stability theory to obtain a sufficiency condition for ensuring the stability of a system index; and finally, solving a linear matrix inequality to obtain an event triggering parameter and a controller feedback gain. According to the method, network bandwidth resources can be effectively saved, the communication capability of a transmission channel is improved, and meanwhile, a networked system can be helped to keep stable operation when coping with network attacks; an event triggering mechanism is introduced, so that the burden of network transmission can be effectively reduced.

The invention relates to an envelope die design method for improving the spatial envelope forming precision under a linear trajectory. The method comprises the following steps of S1, building an O-xyzrectangular coordinate system through employing the highest plane geometric midpoint O of the upper surface of a component as the origin of coordinates; S2, generating an envelope mold design principle based on a component inversion method, and enabling the component to perform linear reciprocating swing motion around a rotating shaft; S3, dispersing and extracting the coordinates of the points on the upper surface of the component, and putting the coordinates into a set V1; S4, obtaining a point set V1' under different rotation angles from the point set V1 in the step S3 according to the movement in the step S2, wherein the set is the overall point cloud during the reverse movement process of the component, and the point cloud on the upper surface of the set is the envelope mold; and S5,extracting the upper surface points from the V1' point set by utilizing a boundary extraction algorithm, and putting the upper surface points into a point set V2, so that the point set V2 is the surface points of the envelope mold under the linear track. The envelope mold obtained by the method does not interfere with the upper surface of the component, and thus the spatial envelope forming precision of the component is improved.

The invention relates to a slope stability building structure design method of mountain land engineering. The problem that the stability of a mountain slope is insufficient by utilizing a building structure for soil retaining is solved. The building structure comprises a raft foundation, a pile foundation and a building structure, wherein the raft foundation is arranged on the surface of the mountain slope, part of a building load is borne by using the bearing capacity of a mountain, and the horizontal soil pressure of the slope is transmitted to a flat ground structure by using a slope surface structure. After the pile foundation is arranged under the flat ground structure, front-row piles of the flat ground structure are pressed after horizontal force of the slope is transmitted thereto,rear-row piles near the slope are pulled, a soil retaining structure similar to a door structure is formed, the stability of the slope structure is improved, and the occurrence of geological disasters such as slope landslide is avoided.

A method for designing decouple controller analysis of multivariable time lag system includes carrying on identification of transfer function matrix for chemical industrial multivariable time lag procedure, designing two regulation factors being able to be realized by controller and designing decouple controller, leading designed controller to be infinite high order if GO ( s ) still contains time lag item after object transfer function matrix is decomposed, applying controller order-decreasing technique to carry out order-decreasing on controller.

The invention discloses a GIS transient simulation electromagnetic interference source. The GIS transient simulation electromagnetic interference source includes a boosting transformer U1, a power side simulation capacitor C1, a circuit breaker, a power side outlet bushing A2, a sphere gap, an isolating switch, a load side outlet bushing A1 and a load side simulation capacitor. The circuit breaker, the sphere gap and the isolating switch are in series connection between the power side outlet bushing A2 and the load side outlet bushing A1 to constitute a main loop. An output end of the boosting transformer U1 is connected to the power side outlet bushing A2. The power side simulation capacitor C1 is connected to the power side outlet bushing A2 and is intended for simulating the power side capacitance of an actual transformer substation. The load side simulation capacitor C2 is connected to the load side outlet bushing A1 and is intended for simulating the GIS outlet load side capacitance of the actual transformer substation. According to the invention, the GIS transient simulation electromagnetic interference source can simulate the processes of transient electromagnetic interference and very fast transient overvoltage produced in the opening and closing of the circuit breaker and isolating switch in a GIS device, simulates in an actual manner an actual electromagnetic environment where an electronic device is, and makes testing result more real and reliable.

The invention relates to the technical field of automobile structure design, in particular to a design method and a design device for a door protection plate pushing cushion block. The method comprises the following steps: S1, determining a chest compression amount target value and a pelvic resultant force required value; s2, constructing a two-dimensional relation curve among the chest compression amount, the pelvic resultant force and the pushing cushion block span point distance; s3, determining a theoretical value range of the cross-point distance of the pushing cushion block; s4, determining a theoretical value range of the action area of the pushing cushion block; s5, constructing a three-dimensional relation curved surface of the chest compression amount, the pushing cushion block span point distance and the pushing cushion block action area; and S6, selecting a proper design value of the cross-point distance of the pushing cushion block and a design value of the action area of the pushing cushion block, and determining the material type of the pushing cushion block. The design method disclosed by the invention is simple and efficient, and the design parameters of the pushing cushion block can be quickly obtained on the premise of meeting the Chinese new vehicle evaluation regulations and vehicle model project development targets.

The present invention discloses a single-layer vibration isolation system design method for power equipment. The method comprises the following steps: testing a vibration property of a vibration source of power equipment so as to acquire an excitation frequency and a vibration isolation performance parameter of the vibration source; acquiring an inertial parameter of the power equipment; determining the number of vibration insulators and a constraint condition in a single-layer vibration isolation system; establishing an optimization objective function of a vibration isolation rate and a comprehensive decoupling rate; and establishing a multi-body dynamics model and optimizing calculation of a single-layer vibration isolation system design by using a particle swarm optimization algorithm. According to the single-layer vibration isolation system design method for power equipment provided by the present invention, the two design objectives, the vibration isolation rate and the decoupling rate, are both considered, so that with the vibration isolation rate being ensured, a coupling effect of a rigid body mode of each order is effectively lowered. The vibration isolation performance of a vibration isolation system can be truly improved. No repeated commissioning is required in the design process; an acquired design parameter is of an optimal value; an effect evaluation parameter will definitely meet the requirement of specifications; and a design result is accurate and highly efficient.

The invention discloses a dye finishing technique interactive design method, inserting process, and technical parameters of each part of the dye finishing technique, etc, into a database; exchanging the dye finishing information on network; finally making interactive exchange with enterprisers by establishing platforms; and implementing a fast and high-efficiency interactive design.

The invention discloses an isolating switch simulating an electromagnetic disturbance source, comprising a test transformer, a capacitor voltage divider, an adjustable grounding inductance, a power supply side analog capacitor, a vacuum circuit breaker switch, a discharge ball gap and a load side analog capacitor; the primary side of the test transformer Connect the power supply, the secondary side is connected in series with the capacitor voltage divider; the analog capacitor on the power supply side is connected in parallel with the capacitor voltage divider; The negative terminal of the analog capacitor is connected to ground. The invention can truly simulate the electromagnetic disturbance process and the ground potential rise process generated by the opening and closing process of the isolating switch, and can output a high-intensity electromagnetic field of 1.1 MHz; it has convenient assembly, simple operation, safe test and high precision.

The invention discloses a method for designing an efficient duct and relates to the field of designing of a ship propelling system. Ducted propellers are applied to ships with heavy loads more and more widely. A duct is one of key components of the ducted propeller. The research direction can be that the efficient ducts are found, so that the method for designing the efficient duct is provided and based on a duct parameterization expressing method. According to the efficient duct designing method, the linetype of the duct is expressed in a parameterized mode, and the efficient duct is designed according to a CFD calculation method. By the adoption of the method for designing the efficient duct, the efficient duct can be conveniently and rapidly designed.

The present application discloses a circuit and method for solving the loss-of-lock and wrong-lock of broadband mixing phase-locked loops, and relates to the technical field of microwave frequency synthesis, wherein the circuit includes: a phase detector, a loop filter, a voltage-controlled oscillator, a broadband Mixer, voltage preset circuit, clamping circuit and single-pole single-throw switch; the output end of the phase detector is connected with the input end of the loop filter, and the output end of the loop filter is respectively connected with the The input end of the voltage-controlled oscillator, the output end of the voltage preset circuit, the output end of the clamping circuit are connected to one end of the single-pole single-throw switch, the other end of the single-pole single-throw switch is grounded, and the voltage-controlled oscillator The output terminal of the detector outputs a signal, and after the signal is mixed with the local oscillator input signal through the broadband mixer, a mixed intermediate frequency signal is obtained, and the mixed intermediate frequency signal is input to the other input terminal of the phase detector. The application can quickly pull the initial frequency difference of the phase-locked loop into the locking band of the frequency phase detector, effectively reducing the locking time.

The invention discloses a sand dune-like microstructure with high-efficiency air drag reduction function on the surface and an optimization design method thereof. First, the method of computational fluid dynamics (CFD) is used to construct the transverse array of dune-like microstructure in the flow field region,. The drag reduction rate was obtained by using Reynolds average numerical simulation(RANs) and Fluent solver, and with the total pressure drop as the calculation index. Finally, the dune-like microstructure parameters with high-efficiency air drag reduction function were optimized tomeet the expected goal. Compared with the traditional biomimetic drag reduction microstructure, the dune-like microstructure design method with high-efficiency air drag reduction function provided bythe invention has the universality for different flow field states. In addition, the method provided by the invention can save the design cost, shorten the design cycle, reduce the design loss, and provide a certain reference for the aerodynamic structure design of the aircraft.

The invention discloses a scaling-theory-based design method of high-performance absorber. The method comprises: S1, on the basis of a prototype wave-absorbing material, corresponding electromagneticparameters and a corresponding prototype frequency are obtained, wherein the electromagnetic parameters include a dielectric constant and a magnetic permeability; S2, according to a reflectivity calculation theory of multi-layer materials, impedance characteristics and changing rule functions of all layers of materials are analyzed by combining the electromagnetic parameters and the prototype frequency of the prototype wave-absorbing material, thereby obtaining an impedance characteristic function; and on the basis of a scaling theory, a scaling material having the shape same as the prototypewave-absorbing material is prepared and scaling electromagnetic parameters and thicknesses of all layers of materials are theoretically designed based on the impedance characteristic parameters; S3, ascaling frequency coefficient and a shape ratio factor are determined to obtain a material prescription meeting the impedance characteristic; and S4, a needed high-performance absorber is constructedby using the material prescription. The method has the following advantage: the quick design of a broadband absorbing material is realized.

The invention relates to a machine learning method, system and device for metasurface lens design and a medium, and the method comprises the steps: obtaining a relation between basic attributes of functional elements and optical effects which can be generated by the functional elements through constructing and training a neural network, and building a performance database of the functional elements; and optimizing the required target function element in the performance database by using a particle swarm optimization algorithm to complete the design of the metasurface lens. Compared with the existing metasurface lens design related to machine learning, the machine learning method provided by the invention is the only method for determining the excellent performance of the designed metasurface lens through experimental verification, and the performance of the metasurface lens designed by the method is higher than that of the metasurface lens designed by a traditional numerical method.

The invention discloses a working method of an SIP soft terminal supporting a WEB service and multiple browsers. The soft terminal is a multimedia terminal of which various interfaces for supporting the WEB service and multiple browsers are configured on the conventional desktop and which uses a webpage browser as an operation carrier. The soft terminal is provided with a JavaScript interface and a soft terminal assembly module, wherein the JavaScript interface is provided with a soft terminal builder and a soft terminal expansion interface; and a soft terminal functional module is packaged as a soft terminal assembly module by using a browser adapter interface. Compared with the conventional soft terminal, the SIP soft terminal has the advantages that: the building of the soft terminal assembly module is triggered by a JavaScript script and finally the soft terminal is embedded in the browser, the trouble of manual installation by the user is saved and a technique for the embedment in the browser is mature and is easy to realize; an operation platform set for developing WEB expansion services, which is a JavaScript-based bidirectional calling interface is provided for a programmer, the working details of a bottom layer soft terminal module is shielded, and the development of rich WEB services satisfying the individual needs of customers by the programmer is made extremely convenient.

The invention provides a method for designing overall parameters of a solid rocket motor, which includes obtaining the task target, adopting the optimized Latin hypercube experiment design method to generate initial sample points in the design space; inputting the initial sample points into the engine performance simulation model to obtain the initial sample points Constraints and objective functions corresponding to the points; according to the initial training samples formed by the initial sample points and the constraints corresponding to the initial sample points and the objective function, construct the proxy model of the objective function and constraints; use the differential evolution algorithm to optimize the proxy model process and output the optimal sampling point; input the optimal sampling point as a new sampling point into the engine performance simulation model, and output the optimal engine structural design parameters according to the convergence conditions. By adopting the method of the invention, the structural parameter design with optimal comprehensive performance can be obtained, and the overall design efficiency and comprehensive performance of the solid rocket motor can be significantly improved.