33results about How to "Ease of design optimization" patented technology

The invention discloses a hot wall heat exchanger. The hot wall of the hot wall heat exchanger includes an inner support device and a heat exchange partition wall covering the inner support device. section and the upper and lower ends for the left and right circulation of the phase change fluid; the hot wall is rectangular, and several hot walls of the same size are juxtaposed into clusters, or the hot wall is ring-shaped, and several hot walls of different sizes are nested in clusters ; Each adjacent hot wall is provided with channel strips or fins to facilitate the passage of fluid; the fluid side of all channel strips or fins outside the hot wall is divided into multiple regions, which is realized by the phase change fluid in the hot wall Heat exchange of heat exchange fluids. The compactness of the hot wall heat exchanger proposed by the present invention is higher than that of the current heat pipe, and it can be adapted to more heat exchange fields. The variable fluid circulation speed is accelerated, and the heat exchange efficiency is improved.

The invention discloses a control method and a control circuit of an isolated bidirectional charger, belonging to the technical field of power electronic converters. The bi-directional charger controlcircuit adopted by the method comprises a bi-directional AC/DC converter, an isolated DC/DC converter and a control unit. The power grid is connected to the battery pack through bi-directional AC/DCconverter, isolated DC/DC converter, isolated DC/DC converter using LLC converter, control unit including sampling circuit, DSP and optocoupler isolated driving circuit. The control method realizes the high efficiency of bi-directional operation and forward and backward operation of the vehicle-mounted charger, and has the advantages of high power density, high reliability, few devices and high efficiency.

The invention discloses a calculation method of safety thickness of supporting layers of pile foundations of karst areas. The calculation method comprises the following steps: step 1, establishing an assumed model, and simplifying the model; step 2, performing theoretical analysis on the safety thickness of the supporting layers; step 3, performing preliminary checking calculation on the safety thickness of the supporting layers; step 4, performing accurate checking calculation on the safety thickness of the supporting layers; step 5, judging whether the supporting layers satisfy calculation requirements. The calculation method disclosed by the invention is simple in calculation, facilitates design optimization of pile foundations, and is high in operability; in addition, through the adoption of the calculation method, the improvement of relevant norms is promoted, so that huge economic benefits and social benefits can be brought.

The invention relates to a parameter optimization method based on Pareto optimality under a dual-mode configuration multi-target condition, and belongs to the field of new energy vehicles. The method comprises the following steps: S1, constructing a steady-state kinetic equation under different configuration modes of a dual-mode configuration and a mode switching strategy based on transmission efficiency maximization; S2, establishing a hybrid power transmission system transient kinetic equation considering the rotational inertia of components; S3, based on a dynamic programming algorithm, constructing economic evaluation indexes including working condition related economic cost and transmission system part cost and a dynamic property evaluation index quantified by hundred kilometers of acceleration time; and S4, constructing a multi-objective optimization function through a Chebyshev aggregation method, and obtaining the economic cost related to the dual-mode configuration related working condition, the power transmission system part cost and the optimal Pareto leading edge of the dynamic property taking the acceleration performance as an evaluation index based on a multi-objective evolutionary algorithm MOEA/D. According to the method, a wider design space is provided for configuration optimization.

The invention belongs to the technical field of controllers and particularly discloses an active disturbance rejection control method based on a fractional order extended state observer. The method comprises the following steps: S1, comparing an input reference signal with a system output signal to obtain a system error; S2, taking the system error as an input signal of a proportional controller to obtain a system control rate; S3, taking a controlled object as a purely fractional integral transfer function as shown in the description, taking a part except the transfer function as shown in thedescription in the controlled target as disturbance, and observing the disturbance through the fractional order extended state observer to obtain an observation value of the disturbance; and S4, estimating the disturbance to obtain gain estimation of the controlled object, carrying out real-time compensation on the disturbance according to the control rate and the observation value of the disturbance to obtain the stable controlled object. The fractional order active disturbance rejection control method has better robustness on a control parameter, also has good robustness on system gain change, and has better capability of resisting noise interference.

The present invention belongs to the technical field of digital circuits, and in particular relates to an AMS based asynchronous sequential circuit design method. The method mainly comprises the steps of: determining the overall architecture of a designed asynchronous sequential circuit; dividing the overall architecture into two parts namely a control path and a data path according to characteristics of the asynchronous sequential circuit; finishing the design of the control path for replacing a global clock in a customized manner, and meanwhile finishing the design of the data path in a manner of establishing a virtual clock by adopting a conventional synchronous sequential circuit design flow; and performing simulation and verification on the control path and the data path by using an established AMS simulation platform, thereby obtaining a structure forming an integrated circuit. The AMS based asynchronous sequential circuit design method has the beneficial effects that based on a design idea of solution synchronization, and by performing effective division of the data path and the control path on an integrated system, the compatibility problem of the design of a synchronous sequential circuit is solved, the simulation time and difficulty are greatly reduced, and the method is more beneficial for realizing a VLSI design.

The invention relates to a method for determining an oil-increasing effect of carbonate reservoir plugging agent deep profile control and flooding technology. The method includes the steps that steps1, a plugging agent profile control and flooding physical model is established according to the fluid seepage between injection wells and oil production wells being equivalent to the flow in a flow pipe; step 2, according to the plugging agent profile control and flooding physical model, the position of the plugging agent leading edge and the position of a plugging agent tail skirt and the movement track of plugging agent slug in porous media, a plugging agent seepage mathematical model is established; step 3, according to the plugging agent seepage mathematical model and the process of plugging agent injection, the flow rate and injection pressure in the process of profile control and flooding are determined; and step 4, according to the number of effective oil production wells controlledby the injection wells, the change of water cut of oil wells, the plugging agent seepage mathematical model in the second and third steps and the profile control and flooding flow rate and pressure,the oil increment and recovery efficiency of oilfield blocks are determined after the profile control and flooding measures are taken. The method is accurate, reliable and high in practicality.

The invention provides an air conditioning system capable of switching between refrigeration and heating. The air conditioning system comprises a reversing valve, a compressor, a first indoor unit, a second indoor unit and an outdoor unit. The reversing valve in the air conditioning system can conveniently enable six connecting pipes to switch between a 2-2-2 communicating mode and a 3-3 communicating mode; compared with a technical scheme of synchronously using two four-way valves in the prior art, the same effect can be achieved; but for the air conditioning system, after one reversing valve is used for replacing the two four-way valves, pipelines are simplified, the pipeline design is convenient, the space is released, the installation of the compressor can be guaranteed, the further design optimization is convenient, and the valve and pipeline costs are reduced; and in particular, the invention is suitable for an air conditioning system containing double air sucking compressors.

The invention discloses a complex interface time sequence-based software system test verification method. The method comprises the following steps of: firstly carrying out interface attribute analysison a software system; generating a software system test verification case according to the interface attribute analysis result; carrying out feedback, iteration and optimization on the software system test verification case; and finally carrying out interface time sequence test verification by using the obtained software system test verification case. The complex interface time sequence-based software system test verification method is constructed by combining development engineering practice of spacecraft systems; and being compared with the prior art, the method is capable of effectively shortening the complex interface time sequence test period, reducing the test cost and improving the coverage and robustness of complex interface time sequence test, and has an important engineering practical meaning.

The invention discloses a double-frequency-point ultrahigh-frequency broadband tag antenna, which comprises a dielectric substrate, a resonant structure, an impedance matching structure and a metal bonding pad, and is characterized in that the resonant structure comprises a first resonant unit and a second resonant unit; the first resonance unit comprises a first rectangular metal microstrip line, a second rectangular metal microstrip line, a third rectangular metal microstrip line, a fourth rectangular metal microstrip line and a fifth rectangular metal microstrip line which are attached to the upper surface of the dielectric substrate; the second resonance unit comprises a sixth rectangular metal microstrip line, a seventh rectangular metal microstrip line and an eighth rectangular metal microstrip line which are attached to the upper surface of the dielectric substrate, and the impedance matching structure is located on the front side of the second rectangular metal microstrip line and located on the right side of the second resonance unit. The impedance matching structure comprises a ninth rectangular metal microstrip line, a tenth rectangular metal microstrip line, an eleventh rectangular metal microstrip line and a twelfth rectangular metal microstrip line which are attached to the upper surface of the dielectric substrate; and the antenna has the advantage of wide working frequency range coverage.

The invention discloses an active and passive wave compensation experiment device. The device comprises a wave simulation platform, a load suspending system installed on the wave simulation platform,and an active and passive wave compensation system connected with the load suspending system. The wave simulation platform comprises a fixed pedestal, and a platform is disposed above the fixed pedestal. The fixed pedestal is connected with the platform through a six-freedom-degree simulation hydraulic cylinder. The device employs the six-freedom-degree wave attitude simulation equipment as the wave simulation platform, can achieve the prediction of the motion trend of the platform in the future takt time, and takes the corresponding compensation measures. The active and passive wave compensation experiment device can provide a real experiment environment for the research and debugging of a wave compensation prediction algorithm. The experiment device employs a variable pump as the drivingforce, and improves the loading capability.

The invention discloses a micro electro mechanical system design optimization method based on an integrated model assisted social learning particle swarm algorithm, which comprises the steps of initializing a population according to a control range of a design variable of an MEMS; selecting a proper amount of samples from the candidate set as a training set according to a selection rule to train an integration model; then, solving the population by using a social learning particle swarm optimization algorithm, and giving a fitness prediction value of each individual by an integrated model; finally, using an SMIC point adding criterion for managing the model, wherein a proper individual is selected for real fitness evaluation. In each iteration, the optimal position is searched from the candidate set cache, and when the iteration is ended, the finally stored position of the optimal individual is used as the optimal variable combination in the MEMS design. Not only can a high-quality design solution be obtained, but also the risk caused by an agent model with poor fitting can be reduced, and the method is suitable for optimization of different types of MEMS.

The invention discloses a simulation test method of the air leakage of a piston. The simulation test method disclosed by the invention comprises the following steps of: increasing pressure of hydraulic oil; changing the frequency of the hydraulic oil; introducing the hydraulic oil in a cylinder sleeve (1), in which the piston (2) is put, so that the piston (2) moves along the axis of the cylinder sleeve (1); putting the hydraulic oil in the cavity of the piston (2); and the hydraulic oil flowing out from the cavity of the piston (2), and measuring the flow of the hydraulic oil by using a flowmeter (3). By means of the simulation test method of the air leakage of the piston, the problems of being long in period, low in efficiency and the like in the process of testing the air leakage of the piston are effectively solved. The invention further discloses a simulation test device of the air leakage of the piston. The simulation test device disclosed by the invention is lower in cost and higher in efficiency and is beneficial to design optimization of the piston.

The invention discloses a test device for developing equipment. The test device comprises a main frame and a support plate assembly, two opposite sides of the main frame are respectively provided witha side plate, at least one adjusting hole group is arranged between the main frame and the side plates, the side plates can move relative to the main frame through the adjusting hole group to adjustthe distance between the side plates, the support plate assembly is arranged on the main frame, and the support plate assembly is located between the side plates at two sides of the main frame. According to the technical scheme, the distance between the side plates can be adjusted through the adjusting hole group according to different distance test requirements, the function of adjustable distance of the test device can be realized, the reference of the test data is high, and design optimization and structural adjustment for the product are facilitated.

The invention discloses an oil sprayer fixing tool. The oil sprayer fixing tool is applied to optical engine research and comprises a main pipe, a mounting pipe and an angle adjusting assembly; an opening is formed in the outer side wall of the main pipe in a run-through way; the main pipe is used for fuel oil to circulate; the mounting pipe is provided with a connecting end and a mounting end which are arranged oppositely; the connecting end is hermetically arranged at the opening and communicates with the main pipe; the mounting end is used for mounting an oil sprayer; the mounting pipe is used for guiding the fuel oil in the main pipe into the oil sprayer and spraying out the fuel oil through the oil sprayer; the axis of the mounting end and the axis of the main pipe are intersected andform an adjusting plane; and the angle adjusting assembly is arranged between the main pipe and the mounting end and is used for adjusting the angle between the mounting end and the main pipe in theadjusting plane. Thereby, the angle of the oil sprayer relative to the main pipe is adjustable in the test process, the fuel form in a cylinder at different mounting angles is convenient to observe and design optimization is benefited.

The invention provides a horizontal-axis wind generating set with foldable wind wheels and a using method. The horizontal-axis wind generating set with the foldable wind wheels comprises an inner and outer double wind wheel and an annular cabin, wherein the inner and outer double wind wheel comprises an outer wind wheel and an inner wind wheel, and the outer wind wheel is mounted on the outer side of the annular cabin and is arranged in the manner of a foldable structure; the inner wind wheel is mounted on the inner side of the annular cabin; the annular cabin comprises a mechanical transmission system and a direct-driven generator, and the direct-driven generator is provided with rotors, and the axes are arranged in the vertical direction; and the inner and outer double wind wheel is in kinematic mechanical connection with the direct-driven generator, and wind energy is converted into electric energy. When the horizontal-axis wind generating set with the foldable wind wheels encounters extreme disastrous weather conditions, the outer wind wheel is folded, the wind wheel swept area is reduced, and safety of the wind generating set is protected. According to research and development of the device, the structural characteristics of the horizontal-axis wind generating set are fully utilized, components and the connection form are systematically optimized, the manufacturing and mounting cost is controlled, and meanwhile the capability of the horizontal-axis wind generating set for coping with disastrous weather conditions is effectively improved.

The invention discloses a measuring instrument, and relates to the field of measuring equipment. The measuring instrument comprises a machine frame; a first sliding part which is movably arranged on the machine frame, and can move in a first direction; a second sliding part which is movably arranged on the first sliding part and can move in a second direction, wherein the second direction is perpendicular to the first direction; a holding part which is movably arranged on the second sliding part, and can move in a third direction, wherein the third direction is perpendicular to the first direction and the second direction, the holding part is provided with a to-be-tested product interface, and the to-be-tested product interface is connected with an operating component of a to-be-tested product; a force sensor which is arranged at the interface of the to-be-tested product; and at least three speed measuring assemblies which are suitable for measuring the speed of the first sliding part,the speed of the second sliding part and the speed of the holding part respectively. The purpose of the present invention is to provide a measuring instrument capable of measuring a parameter of a force of a user using a consumer-grade product.