84results about How to "Optimize design parameters" patented technology

The invention discloses a wind power gear box fault diagnosis test platform based on multi-feature fusion and a method, solves the problems such as single detection method, a random wind load specialworking condition as well as oil change interference which are faced by wind power planet gear box fault diagnosis and has the beneficial effect of high fault diagnosis accuracy. A scheme is as follows: the test platform comprises a test bed base provided with a to-be-tested wind power gear box, a vibration acceleration sensor and a noise signal sensor are arranged at the circumference side of theto-be-tested wind power gear box, the circumference side of the to-be-tested wind power gear box is connected with an oil liquid information detection sensor, each sensor is respectively and independently connected with a data acquisition module, and an evaluation method can extract vibration feature indexes specific to random wind load working conditions, extract noise feature indexes and extract oil liquid feature indexes specific to oil change interference problems, so that a vibration-noise-oil liquid feature fusion evaluation model based on deep learning and DS evidence theory is built.

The invention relates to a design method of a ballastless track roadbed structure of a high-speed railway. The method comprises the following steps of providing aA simplified model of ballastless track load distribution is provided; establishing a dynamic modulus-strain relationship model of the coarse-particle roadbed filler; carrying out homogenization treatment on the supporting layer, the subgrade surface layer and the subgrade bottom layer by adopting modulus and thickness equivalent assumption of an Odemark method, and calculating subgrade stress and strain from the supporting layer by adopting a Buchner Boussinesq formula; considering a nonlinear relationship between roadbed filler strain and deformation modulus, and constructing a roadbed structure design method based on iterativecomputation; and optimizing a roadbed structure based on roadbed surface dynamic deformation and a roadbed bottom layer dynamic strain control criterion. According to the design method, fFor the ballastless track roadbed structure, the roadbed load distribution rule can be more reasonably represented, the influence of the nonlinear relationship between roadbed filler strain and deformation moduluson roadbed stress-strain calculation is reflected, and the refinement degree of ballastless track roadbed structure design is improved.

The invention relates to a high-speed railway subgrade structure design method which comprises the following steps: determining a high-speed railway subgrade structure form and determining a subgradesurface load distribution form; establishing a multilayer roadbed system model; establishing a single-layer soil body stress-strain relationship analytical solution; proposing a subgrade stress and displacement expression considering the material difference of each layer; considering a nonlinear relationship between subgrade filler strain and deformation modulus, and constructing a subgrade structure design method based on iterative computation; and optimizing a subgrade structure based on a subgrade surface dynamic deformation and subgrade bottom layer dynamic strain comprehensive control criterion. The design method is based on the multi-layer system theory, the physical law of each layer structure of the subgrade bed in the service process can be more reasonably represented, the optimalresult of subgrade design is economically and effectively given, and meanwhile, the stability and high efficiency of high-speed rail subgrade design are ensured.

The invention provides an oil-free piston compressor of a medical vaporizer. The oil-free piston compressor comprises a crankshaft, an air cylinder, a piston, a connection rod, an air cavity and an air valve, wherein the crankshaft and the air cylinder are connected with an output shaft of a motor, the piston is mounted in the air cylinder in an inserted manner, the crankshaft and the piston are connected via the connection rod, the air cavity is fixed on an end portion of the air cylinder, the air valve is arranged between the air cavity and the air cylinder, the air cylinder is provided with an air inlet and an air outlet, and the air inlet comprises an extension portion fixed inside the air cavity. The air inlet is provided with the extension portion in the air cavity, overlap between vibration generated due to airflow flows into the air cavity from the air inlet and intrinsic frequency of the oil-free piston compressor, sound resonance phenomenon is reduced, and noise is greatly lowered.

The invention provides a bogie of a railway vehicle and an axle-head power generation assembly of the bogie. The axle-head power generation assembly comprises a power generator and a belt tension mechanism. The power generator is hung on a framework of the bogie and is connected with an axle by a belt, and the belt tension mechanism is arranged below the framework, is capable of longitudinally deforming and is longitudinally blocked between the power generator and a guide frame of a side bracket of the bogie in a pre-compression state, so that tension force can be provided for the belt. The bogie and the axle-head power generation assembly have the advantages that the axle-head power generation assembly is arranged below the framework of the bogie, without occupying spaces above the framework and is simple in structure, small in occupied space and little in influence on the structure of the framework of the bogie, and design parameters of the vehicle can be optimized; the belt tension mechanism is longitudinally blocked between the power generator and the guide frame of the bogie in the pre-compression state, the belt tension force which can vary along with conditions of the vehicle can be provided for the belt, and the bogie and the axle-head power generation assembly are simple in structure and small in occupied space and can assist in optimizing the design parameters of the vehicle.

The invention discloses a full-link dynamic image quality numerical simulation system and method for an aerospace camera optical system, and relates to the technical field of photoelectric imaging. The method solves a problem that existing on-orbit camera image quality restricting factors are complex and difficult to evaluate singly. The full-link dynamic image quality numerical simulation systemcomprises an optical simulation module, a structure simulation module, a thermal simulation module and a dynamic simulation module. The thermal simulation module is used for simulating the temperaturefield distribution of the camera system in a working environment and calculating the structural deformation of the camera assembly caused by environmental change. The structure simulation module is used for simulating structural deformation caused by in-orbit gravity change of the camera system. The dynamic simulation module is used for calculating the structural deformation of the camera at eachmoment in the system structural vibration and attitude correction motion working state. The optical simulation module simulates the processing surface shape and final image quality calculation of each component of the optical system according to results obtained by the thermal simulation module, the structure simulation module and the dynamic simulation module. The analysis accuracy is further improved, the system development period is shortened, and the manufacturing cost is effectively reduced.

The invention relates to an anchor rod ultimate anti-pull force design parameter optimization design method under different expansion agent contents in rock and soil masses. According to acquisitionsof field experiments, the anchor rod ultimate anti-pull force of a rock mass reaches 147 percent of the anti-pull force of ordinary cement or above; the anchor rod ultimate anti-pull force of a soil mass reaches 179 percent of the anti-pull force of ordinary cement or above; and known that compared with the traditional anchoring technology, for a expansion cement slurry anchoring technology, the anchor rod anti-pull force is greatly improved. The expansion cement mortar anchoring technological design parameter optimization design method performs calculation and analysis from three aspects of soil layer and anchoring force, steel bar strength and M30 mortar and correspondingly reduces the drilling diameter, the steel bar cross section and the drilling depth under the condition of ensuring invariable anchorage body ultimate anti-pull force. In the premise of ensuring the engineering safety, anchor rod design parameters are optimized, and the method can remarkably lower the engineering cost and has wide engineering application prospect and popularization value.

The invention discloses an adaptive electric leakage compensation circuit for an LDO (low dropout regulator). The grid electrode of the power supply PMOS transistor MPP of the LDO is connected with the output of an error amplifier EA. The circuit is characterized in that the circuit is connected between the source electrode and drain electrode of the MPP; a sampling PMOS transistor MPS and a pairof NMOS transistors are connected so as to form the circuit; the grid electrode of the MPS and the common source electrode of the MPP and the MPS are connected with input VIN; the common drain electrode of the MPP and the MN2 is output VOUT; the common drain electrode of the MPS and the MN1 is connected with the common grid electrode of the MN1 and the MN2; the common-source of the two NMOS transistors is grounded; the size ratio of the MPS to MPP is 1:K1; the size ratio of the MN1 to MN2 is 1:K2; and K2 is greater than K1. The adaptive compensation circuit is simple in structure and practical; generated leakage current is tracked adaptively through the sampling PMOS transistor; the leakage current is completely pulled out through the two connected NMOS transistors; the output stability ofthe LDO in a temperature conversion environment can be guaranteed; and no quiescent current is generated in the circuit at the normal temperature, so that the optimization of design parameters is facilitated.

Disclosed is a cooling fan for a microwave oven, adapted for directing axially sucked airflow to be evenly distributed over a magnetron and a high voltage transformer. The cooling fan comprises a mixed flow fan having a specified hub angle, or an axial flow fan having optimized design parameters such as a ratio of an outer diameter of the fan to a width of a electric device chamber defined in a cabinet, a hub ratio, a sweep angle, a pitch angle, a maximum camber rate, etc.

The invention provides a comprehensive parameter testing system of a suspension type material transmitting device, and the comprehensive parameter testing system comprises a suspension type conveyor experimental bench (1), a plurality of disc grooves (2), a fan (6), a frequency converter (7), a PC (personal computer) (10) and a sensor (12), wherein the disc grooves (2) are mounted on the suspension type conveyor experimental bench (1); one disc groove (2) is mounted for each test; the disc grooves (2) are provided with air holes; a transmitting belt is placed on the disc grooves (2); the sensor (12) is mounted on the transmitting belt; the sensor (12) is connected with the PC (10) and transfers a signal to the PC (10); the PC (10), the frequency converter (7) and the fan (6) are connected in sequence; the frequency of the frequency converter (7) is set through the PC (10); the frequency converter (7) is used for controlling the working frequency of the fan (6); and the fan (6) is connected with the suspension type conveyer experimental bench (1) and supplies air to the suspension type conveyer experimental bench (1) to drive the transmitting belt to drive.

The invention discloses a horizontal well close cutting fracturing crack propagation prediction and design parameter optimization method, and relates to the field of oil and gas yield increasing transformation. The method comprises the following steps of (1) collecting stratum parameters, construction parameters and well completion parameters; (2) establishing a unit numbering rule and a unit connection matrix; (3) establishing a crack propagation rock deformation and in-crack pressure calculation model; (4) establishing a fracturing multi-crack extension step length model; (5) establishing a hydraulic crack and natural crack interaction model; (6) integrating the steps (2)-(5) to establish a close cutting fracture multi-crack extension model of the horizontal well; and (7) substituting the parameters in the step (1) into the model in the step (6), simulating crack extension tracks under different parameter conditions, and optimizing fracturing design parameters. According to the horizontal well close cutting fracturing crack propagation prediction and design parameter optimization method, complex expansion behaviors such as crack bifurcation and intersection can be predicted, the problem of numbering of complex crack units is solved, the vertical crack width is corrected, and accurate simulation of the close cutting fracturing crack multi-fracture expansion track and optimization of design parameters are achieved.

The invention provides a high-efficiency oily sewage treatment method, comprising the following steps: pressurizing to-be-treated oily sewage, and then delivering the pressurized oily sewage into an electric flocculation tank so as to generate a polynuclear hydroxy complex, hydroxide floccules and hydrogen gas bubbles; adding gas-dissolved water into the oily sewage after electrolysis to enable the polynuclear hydroxy complex to adsorb the floccules, sediment grains and large-particle oil drops in the sewage; wrapping the oil drops and the sediment grains with micro-bubbles and hydrogen gas bubbles in the gas-dissolved water; performing cyclone separation to remove the floccules, the large sediment grains and the oil drops; and performing flotation separation on the treated sewage in a full-water low-pressure state to remove the remaining polynuclear hydroxy complex-oil drops, hydroxide floccules-suspended particles, micro-bubbles-oil drops and sediment impurities, so as to obtain purified water. The device and the method provided by the invention can be used for removing oil drops, sediments, colloids, dissolved organic matters and heavy metal ions in sewage at the same time, bacteria and viruses in water can also be killed without adding chemical reagents, and the water quality after treatment is stable and reaches the standards.

The invention provides a method for arranging a crossed cylindrical roller turnable bearing stiffness matrix through mechanics modeling. A mechanical model considers the nonlinearity of the contact between a roller and a raceway for the working condition that a radial load, an axial load and an overturning moment load act simultaneously, and is more accurate and practical compared with a traditional superposition method; the mechanical model comprises the main design parameters of a turntable bearing, a basis can be supplied for the reasonable selection of the design parameters by using the result obtained by the model, and optimizing is further performed on the design parameters; the stiffness matrix reflects the non-deformability of the crossed cylindrical roller turntable bearing when bearing the radial load, the axial load and the overturning moment load; the stiffness matrix arranged through mechanics modeling not only can be used for judging whether the model selection of the turntable bearing is right or not, but also can reflect the stiffness margin of the turntable bearing.

The invention belongs to the technical field of a fixed-wing aircraft and particularly relates to a fixed-wing aircraft landing gear and tail hook dynamic load coupled analytic method. The fixed-wing aircraft landing gear and tail hook dynamic load coupled analytic method is characterized in that on the basis of an overall landing configuration and geometric layout parameters of the aircraft, a landing gear and tail hook kinematical/ kinetic equation is established, and by the parametrization design of an oil-air type damper and parameter regulation iteration re-inspection in the software environment, the multi-body dynamic modeling and numerical analysis work of a plurality of subsystems such as an aircraft tail hook and a landing gear is completed. Interactive influence of a load and vibration of each subsystem in a combined state is calculated so as to implement coupling research. A steady state component and a dynamic component of the load of a certain subsystem under the coupled condition are analyzed and are compared with a dynamic load simulated test result in a separated state; difference and a sensitive parameter are discriminated; a coupling/decoupling research method and a tail hook oscillation and main landing gear load oscillation peak shifting avoidance design method are given.

The invention provides a method for measuring the mixing velocity of gas-liquid two-phase flow of a refrigerant, and a matched measuring device. The method comprises the following steps of: measuring the fluid mass flow m of the refrigerant in a refrigeration circuit and the jet impact force of a nozzle outlet, and calculating the average mixing velocity V1 of the gas-liquid two-phase flow which is sprayed by a nozzle and has phase change according to the law of momentum. The measuring method is simple and practical, the influence of a structural parameter of the nozzle on outlet velocity and the energy conversion efficiency of the nozzle can be further studied according to data obtained by studying the mixing velocity of the gas-liquid two-phase flow at the nozzle outlet, the design parameter of the gas-liquid two-phase flow nozzle is optimized, and the efficiency of the whole refrigeration cycle is improved.

The invention discloses a limited drainage method and a method for optimizing the thickness of a grouting circle of a tunnel by utilizing the limited drainage method, and belongs to the technical field of water proofing and drainage of underground construction. According to the limited drainage method, a water pressure adjusting valve is installed at a water outlet of a transverse drainage blind pipe of the tunnel to control external water pressure acting on a secondary lining of the tunnel, then full play is given to the certain carrying capacity of the lining, the thickness of the grouting circle and the drainage of underground water are reduced as much as possible, and then the environment of the underground water is protected. By means of the method for utilizing the limited drainage method for optimizing the thickness of the grouting circle of the tunnel, through an entire theoretical analysis, water pressure, flow rate and displacement of all modules of a support system are calculated, then design parameters are optimized, the thickness of the grouting circle is greatly reduced, the grouting cost is lowered, and the construction speed is increased.

The invention relates to a multi-purpose rapid optimization and design device for EDFA parameters, a manufacture method thereof and an application method thereof. The device comprises an upper computer, a pump laser module, two optical isolators, a wavelength division multiplexer, a multi-path optical switch module and an Er-doped fiber combination module. The upper computer is connected with thewavelength division multiplexer and the multi-path optical switch module. The multi-path optical switch module is connected with the Er-doped fiber combination module. The wavelength division multiplexer is connected with the pump laser module and one optical isolator. Pump light generated by a pump laser and signals from the optical isolators are coupled to enter the multi-path optical switch module. An output end of the multi-path optical switch module is connected with the other optical isolator. The upper computer controls to selects different pumping power and Er-doped fibers and directlydetermines Er-doped fiber length and pumping power required by EDFA. Additionally, an online test is carried out.

The invention discloses a designing method for an advanced small pipe-steel arch-foot locking anchor rod integrated mechanical model and the advanced small pipe-steel arch-foot locking anchor rod integrated mechanical model. The method includes the following steps that according to the actual construction working condition, a tunnel advanced small pipe-steel arch-foot locking anchor rod integratedmechanical analysis model is established; according to the current construction state and the appointed computing method, an imposed load value is determined, and structural internal force and deformation computation are carried out; whether all model physical quantities are over than a permissible value or not is judged, if all the model physical quantities are over than the permissible value, design parameters of corresponding supporting structures are reinforced according to the physical quantities without meeting the requirement, returning and re-computing are carried out, and if all themodel physical quantities are not over than the permissible value, design parameters of corresponding supporting structures are decreased step by step, returning and re-computing are carried out tillmodel physical quantities obtained under the condition of current supporting parameters are close to the permissible value, and computation is end; the next working condition state is calculated tillfull circular working stations are completely analyzed, and a final supporting-structure-parameter design value is output. According to the designing method for the advanced small pipe-steel arch-footlocking anchor rod integrated mechanical model and the advanced small pipe-steel arch-foot locking anchor rod integrated mechanical model, on the premise that the safety is guaranteed, the cost is reduced.

The invention relates to a reliability analysis-based foundation seismic isolation structure system optimization method, which comprises the following steps of: 1) calculating random seismic responseof a foundation seismic isolation structure under a seismic action according to a probability density evolution theory; (2) converting a first-time reliability exceeding solving problem into a probability density function solving problem of an equivalent extremum variable by utilizing an equivalent extremum event criterion, and solving a corresponding probability density function by utilizing a probability density evolution theory so as to obtain the dynamic reliability of the whole structure; 3) determining key design parameters in the seismic isolation support restoring force model through variance sensitivity analysis; and 4) constructing a probability criterion taking the overall reliability of the basic seismic isolation structure system as a constraint and a target, and performing parameter optimization on the key design parameters by adopting a genetic algorithm so as to optimize the basic seismic isolation structure system. Compared with the prior art, the method has the advantages that the calculation result with higher precision can be obtained more conveniently and quickly, the calculation amount is reduced and the like.

The invention provides an optimization design method of a solenoid type solenoid valve, and belongs to the technical field of solenoid valve design. The optimization design method comprises the following steps: firstly, performing primary design calculation on basic structure size parameters of the electromagnetic valve through an empirical formula, wherein the size parameters mainly comprise the diameter of an armature, the length of the armature, the inner diameter of a coil and the outer diameter of the coil; secondly, performing finite element simulation analysis on the electromagnetic valve, including constructing a finite element model of the electromagnetic valve and performing finite element simulation analysis on the model; and finally, obtaining the maximum electromagnetic force and the minimum response time under the excitation of the limited current as a target, carrying out optimization design on the electromagnetic valve structure, and carrying out experimental verification on the optimized electromagnetic valve structure. According to a mainstream structure of a domestic solenoid valve, a simplified model of the solenoid valve is established, and a more efficient and more economical method for optimization design of the solenoid valve is provided; the tedious process of continuously manufacturing samples in the traditional design process is simplified by using a simulation method, and the working efficiency is improved.

The invention discloses a designing and manufacturing method of a flexible wheel of a harmonic reducer. The designing and manufacturing method is characterized in that the flexible wheel comprises a barrel wall; an outer tooth is formed at the outer end of the barrel wall; a transition circular bead is arranged between the rear end face of the outer tooth and the barrel wall, the wall thickness Sof the barrel wall is (0.005-0.01)*D2/L, and the length L of the barrel wall (1) is (0.7-0.8)*D; the tooth width B of the outer tooth (2) is (0.15-0.17)*D2/L; the radius R of the transition circular bead is (0.04-0.055)*D2/L; and D expresses the inner diameter of the flexible wheel. According to the designing and manufacturing method, the manufacturing process of the flexible wheel is improved, the expansion factor of the flexible wheel is reduced, and the transmission precision, hardness and tensile strength of the flexible wheel are improved; and in addition, the shape of the flexible wheelis improved, and the service life of the reducer is prolonged.