171 results about "Designtheory" patented technology

The invention discloses a design method for a multifunctional helicopter, relates to integration and design of the special functional advantages of fuselages of a flying wing aircraft, a tilt ducted fan aircraft, a tilt-rotor aircraft, an on-water take-off and landing aircraft, a fixed wing aircraft, an U.S. F-35B vertical take-off and landing aircraft, a rotor helicopter and the like onto a fuselage of the multifunctional helicopter and overcomes the defects of the fuselages of the aircrafts. The invention creatively provides a design theory of a round flying wing and discloses the following fusion design method that four fixed ducts and one round flying wing are fused and designed on the fuselage of the fixed wing aircraft only by utilizing the actual area which is only one fourth of the area of the round flying wing; and beneficial arrangement and installation platforms are provided for various functional mechanisms. Therefore, the design method has the effects that the multifunctional helicopter has various functions; the working efficiency of the multifunctional helicopter is improved; compared with the rotor helicopter, the multifunctional helicopter is used for saving energy and reducing emission by over 50 percent; and a wide novel idea is developed for designing and manufacturing various multifunctional helicopters.

The invention discloses a design method for a centrifugal pump impeller with a high specific revolution number, belonging to the technical field of pumps. In the invention, the design formulas and the numerical ranges of geometric parameters, such as impeller outlet diameter, impeller front cover plate dip angle, impeller rear cover plate dip angle, blade quantity, outlet location angle and the like are provided, a high-flow low-lift pump with the specific revolution number being 400-600 is designed into a centrifugal pump, compared with the traditional design theory that a pump with the specific revolution number being 400-600 is designed into a mixed-flow pump or an axial-flow pump, the design method provided by the invention achieves the advantages of stable performance during variable working condition running and wide efficient zone; meanwhile, the centrifugal pump impeller in the design method is easy to process and has a certain popularization value.

The invention relates to an embedded system simulate platform based on bus model, which leads in the embedded system flexible bus design theory, to realize the uniformity of various embedded system bottom structure, and use a system model language SystemC to build a processor host simulate model and an expansion interface board simulate model. The processor host simulate model comprises an embedded processor function model, an interface bus mission model or a SOC (on-chip system) function model, and an on-chip mission model. The invention uses software / hardware cooperate design and simulation integrated environment to realize the development of embedded system simulation model, and uses a real-time parallel simulation console to realize the parallel execution and detection of embedded system simulation model.

The invention discloses a preparation method of a functionalized adjustable amphiprotic polycarboxylates cement grinding aid. The method comprises the following steps: according to a certain ratio, adding unsaturated polyether, unsaturated sulfoacid and water in a kettle; preparing unsaturated acid, a catalyst, a ligand and water into an aqueous solution A, and preparing an initiator and water into an aqueous solution B; heating the kettle to 75-95DEG C under the protection of nitrogen, and dropwise adding the aqueous solutions A and B at the same time for 3-5 hours; after the dropwise addition is finished, reacting under heat insulation condition for 1 hour; and after the reaction is finished, adding a certain part of sodium hydroxide for neutralization, and adding water for dilution until the concentration is 40% to obtain a finished product. In the invention, an active / controllable free radical polymerization and macromolecule design theory is adopted to research and develop the functionalized adjustable amphiprotic polycarboxylates cement grinding aid aiming at the effect required by the cement grinding aid, so as to prepare the product of the functionalized adjustable cement grinding aid.

The invention mainly relates to a multi-body dynamics-based automotive suspension, a simulation test and design platform of vibration reduction system, and an analysis method of the multi-body dynamics-based automotive suspension. The analysis method comprises the following steps of: firstly, selecting a three-dimensional parametric model of the automotive suspension or an entire car from a three-dimensional parametric standard model base through an ADMAS / View software interface; secondly, selecting road files of appropriate tire files from a tire file library and a road file library; thirdly, modifying design parameters; fourthly, selecting a simulation test condition, performing a simulation analysis and outputting a simulation analysis result; and finally, determining an optimum design object by using the analysis result, and performing optimum design on design variables. The invention has the following advantages: firstly, a computer technique, a multi-body dynamics theory and an automotive test standard are comprehensively utilized to realize simulation analysis of automobile performance under a virtual environment; secondly, a parameterized modeling technique is utilized to realize model reuse of the simulation analysis of an automobile; and finally, an optimum design theory is utilized to realize the optimum design of the design parameters of the automobile. The multi-body dynamics-based automotive suspension, the simulation test and design platform of the vibration reduction system, and the analysis method are favorable for improving the automobile design efficiency and quality, and quickly respond to quickly changing international and domestic markets.

The invention discloses an alloy steel material for a brake disc of a rapid train. By adopting a most advance alloy design theory and optimizing proportions of elements in the alloy material, the alloy steel material for the brake disc of the rapid train has the following performances that: mechanical property is good, so that the alloy steel material does not deform easily at high-temperature working conditions and is more suitable for completion of the brake disc function of the rapid train; (2) heat and fatigue resisting property is excellent, so that the alloy steel material has no bluing and hot crake phenomena at the 600-DEG C high-temperature working condition; (3) wear resistance property is favorable, so that the alloy steel material has minimum wear rate still at the 700-DEG C high-temperature working condition; (4) stable frictional coefficient is achieved under all working conditions; and (5) thermal conductivity is favorable.

A method of applying a total station to irradiating alignment and positioning of a ship axis includes: 1) arranging the reference total station on the slipway ground, generating a ray parallel to a slipway by the aid of a telescope of the total station, and transiting a theoretical reference point onto a reference target holder arranged on a stern according to a middle longitudinal line of the slipway ground and the perpendicular measuring design theory so that a reference target point is generated; and 2) arranging a working platform on one side of the reference target holder away from the stern, adjusting the three-dimensional space position of the aligning total station positioned on the horizontal working platform, and enabling a laser beam of the aligning total station to pass through the reference target point to generate a theoretical axis center line, namely an aligning total station laser beam ray. According to the method, irradiating alignment and positioning of the ship axis are achieved by the aid of the total station. During aligning construction of the ship axis, only one reference target point needs to be set on the slipway ground, and the three-dimensional space position and an emergent laser beam angle of the total station are adjusted, so that the theoretical axis center line beam for guiding axis alignment can be generated conveniently.

The invention discloses high-voltage electronic violence-resisting clothes and belongs to combined clothes with a violence-resisting function. The design theory is that a high-voltage electronic generator is hidden in the clothes, clothes, shoes and gloves are designed into combined clothes, contact points are overlaid in the gloves, the shoes, the knees and the elbows, high-voltage pulse current can be generated when wearers are attacked so as to beat down the attacker, and the aim of controlling and resisting violence can be achieved. The high-voltage electronic anti-violence clothes have the advantages of: being capable of achieving the effect of controlling and resisting violence in a hidden mode; enabling wearers to defend violence attack of bad persons and attack the bad persons initiatively; and being particularly suitable for outfits of riot polices, plain-clothes men and anti-theft organizations in executing tasks.

The invention discloses an error amount value verification device and an error amount value transferring method of a digital electric energy meter, belonging to the field of error metering of the digital electric energy meter. The verification device comprises a three-phase alternating current verification power supply, an electric energy pulse error comparator and a modular standard electric energy meter; the modular standard electric energy meter comprises a signal conditioning module, an A / D conversion module, a signal processing module, a digital communication module and an electric energy pulse output module as well as an interface circuit; and a verification system comprises the verification device and a verified digital electric energy meter. The error amount value transferring method of the digital electric energy meter comprises the step of: downwardly transferring or upwardly tracing the error amount value. The error amount value verification device, the verification system and the transferring method of the digital electric energy meter in the invention have the advantages of perfect design concept, rigorous design theory, rational equipment structure, convenient operation, simpleness and practicability, belong to the innovative achievement in the digital electric energy metering field, make extension and contribution for enhancing the accuracy and the modernizationlevel of the electric energy metering of China and establishing the new system of the digital electric energy metering, and are worth to be adopted and popularized.

The invention relates to a trouser pattern making method for determining the quantity and the position of crease lines, which is a new method designed for the structure of the trousers. The method sums up the datum line and reference data for the positioning of the crease lines by the figure characteristic analysis of a human body and measurement for the human body. The rationality of the data is verified by experiments; therefore, the data is applied to designing the structure of the trousers, and the traditional pattern making ideas and methods are changed. Based on the quantity and position determination of the crease lines of physical characteristics, the method not only are simpler and faster when being applied to the design of conventional pattern structures, but also reduce the links of middle partition and matching of samples when being applied to the design of unconventional trouser structures. The trouser pattern making method can also provide front-end technical support and necessary theoretical evidences for the automatic generation technology of trouser samples; the method of the invention has simple, fast and convenient operations, low requirements in experiences and facilitates better understanding of the design theories for the trouser structures.

The invention discloses a calculation method of a small and medium-span continuous bridge hogging moment impact coefficient. A small and medium-span continuous bridge is taken as an object, the characteristics, including the structural style, the geometrical morphology, the supporting situation, the quality, the rigidity and the like, of the bridge as well as the influence factors of the impact coefficients, including the amount, the axle number, the axle weight, the axle interval, the driving speed and the like of a vehicle are comprehensively considered, a method of combining theoretical analysis with numerical simulation is adopted to solve a computational formula problem of the regression fitting of the continuous bridge hogging moment impact coefficient according to an interrelation between the impact coefficient and an internal force influence line, the vehicle-mounted dynamic behaviors and mechanisms of the continuous bridge are disclosed, a bridge design theory and a bridge calculation method can be enriched, references are provided for bridge dynamics assessment, and the calculation method is accelerated to be widely applied and developed.

The invention provides an optimal design method for a plate-fin evaporator. The method has the following beneficial effects: based on the design theory of the heat exchanger, the heat exchange coefficient of the refrigerant side of the evaporator is used instead of the heat exchange coefficient of the single phase fluid and then the size of the evaporator core is obtained by solving the equation set; the evaporator designed by the method can meet the efficiency requirement and the fluid on the two sides can simultaneously meet the pressure drop requirement; and when the equation set is solved by an iterative method, the new iteration variable needs to be reasonably selected so as to ensure the numerical solution to converge faster.

The invention relates to a traffic flow control method for lanes having a switchable entrance / exit lane of a signal intersection. With regard to a condition that the entrance straight lanes are more than the exit straight lanes, according to a traffic flow operation track and a traffic design theory, optimization design is made on an entrance left-turn lane of the opposite-direction entrance so asto increase the exit lanes of the opposite-direction exit. Two left-turn parking lines of the opposite-direction entrance of the intersection are arranged, wherein one is a prior parking line 2 whilethe other is disposed in a rear position a specific distance away from the prior parking line 2 and acts as a left-turn parking line 1. The distance between the two left-turn parking lines is adoptedas the switchable entrance / exit lane. When straight driving vehicles in the current direction are allowed to pass, the straight driving vehicles on the inner straight lane of the current direction utilize the distance between the left-turn parking line 1 and the left-turn parking line 2 as a temporary straight exit lane for passing and gradually merge to straight driving vehicles on the right side exit lanes in said distance. Therefore, merging conflicts in the intersection is transferred to the external side of the intersection and the through efficiency of the intersection is improved.

The invention discloses a method for designing an anchoring hole structure for reinforcing a rock slope, which comprises the following steps of: firstly, initially sketching parameters including the position, the length, the cross section shape and the like of an anchoring hole; secondly, simplifying the anchoring hole into a beam element to establish a finite element model for reinforcing the slope; thirdly, calculating internal force of the anchoring hole by using the finite element model; and finally, designing reinforcing bars of the anchoring hole and optimizing design parameters according to the internal force calculation result and a concrete member design theory. The method has the advantages of clear concept, high calculation accuracy and the like, facilitates the good design of the anchoring hole structure of an engineering technical personnel.

The invention discloses an energy theory-based prediction method for stress of a TMB (tunnel boring machine) disk hob. The prediction method comprises the following steps: (1) determining the normal pushing vertical force FV, the tangential rolling force FR and the lateral force FS of the hob in a rock breaking process; (2) establishing a hob stress model in the rock breaking process; (3) establishing a rock strain model during the rock breaking process of the hob; (4) establishing an energy-balance equation for the hob and rock; (5) according to the established rock strain model, by setting the principal stress direction of the rock and the principal stress direction of the hob under a cylindrical coordinate to be corresponding, obtaining surface forces on a wedge-shaped surface when the hob breaks the rock, and predicting the stress of the TMB disk hob. Aiming at analysis and research status of all influence factors in the mechanical property of the existing TMB disk hob, the invention discloses the microcosmic energy theory-based novel prediction method for the stress of the hob; through the influence of the added rotation speed of the hob on the stress characteristics of the hob to in previous studies, a basis is provided for the design theory of a cutter with TBM boreability.

The invention discloses a composite material structure reliability optimum design method considering loads and material dispersion. The method includes the steps that (1) according to the characteristics of a composite material structure, the B-basis material strength allowable value of the structure is determined by considering the material dispersion; (2) the load amplification coefficient in engineering design is utilized for conducting design by considering the uncertainty effect of the loads in the structure; (3) with the maximum stress criterion as the standard of judging whether a single-layer board structure is damaged or not, the reliability of single-layer boards is calculated with the first-order second-moment method, and then the total reliability index of a system is solved; (4) according to the optimum design theory of the composite material structure, a multi-objective optimization model is established with the laying angle and thickness of the composite material as design variables, the condition of guaranteeing that the structure has reliability not lower that the system reliability calculated before as the constraint, and the lightest weight of the structure as the objective. Thus, structural reliability optimization of the composite material structure under the design method considering the load amplification coefficient and the material B-basis value is achieved.

The invention discloses an optimum design method for a fan / gas compressor end wall profile and an optimization platform. First, original design of an axial fan hub and a case is subjected to parameterization; data information of control point parameters is extracted, and correlation is performed by the adoption of a cubic spline function; a shell script program is executed; a new control parameterand end wall profile scheme sample is generated; the new control parameter and end wall profile scheme sample serves as input data needed for an exact three-dimensional S2 stream surface calculationprogram, and exact three-dimensional S2 stream surface calculation of a fan / gas compressor is performed; all target function values of the new end wall profile sample are obtained and subjected to global optimization to obtain the optimum end wall profile structure. The optimum design method for the fan / gas compressor end wall profile and the optimization platform are used for end wall profile optimum design theory research and product research of fans / gas compressors of aero-engines and other impeller machines (such as axial flow / radial flow turbines, axial flow / radial flow pumps / gas compressors and axial flow / radial flow fans).

The invention discloses an industrial robot's fault diagnosing method, which relates to the technical field of industrial robots and fault diagnosing. The fault diagnosing method includes: constructing a parametric physical model and a complete fault tree model of an industrial robot; acquiring the real-time operation data of the industrial robot; dynamically simulating the real-time operation conditions of the industrial robot and performing fault judgment according to a theoretical analysis result and an actual monitoring result; according to the fault tree model, performing fault reasoning to look for all possible causes leading to the fault; diagnosing the possible causes of fault one by one to generate corresponding control instructions to drive the robot to move; and according to the feedback information, confirming the cause of the malfunction. The method of the invention makes full use of the existing data in a control system, does not requiring the adding of other physical devices, fully utilizes the design theory of the device, has the advantages of simplicity and practicality, and can identify the cause behind a specific fault simply and effectively.

The invention provides an open hierarchical design method for a complex electronic system and aims to provide a system analysis and design method for system application integration in a complex electronic system. The design method comprises the steps that firstly, the hierarchical design theory is adopted to divide the system into an application layer, a logical component layer and a physical platform layer; secondly, with regard to a specific complex electronic system application, a meta model of all levels of hardware elements and software elements and incidence relations is abstracted, and a visual modeling environment of the specific complex electronic system is established; thirdly, the complex electronic system is analyzed and decomposed in the visual modeling environment, so that a hardware model, a software model and a deployment model are established, wherein the hardware model, the software model and the deployment model are described by the meta model, and the hardware model, the software model and the deployment model are converted into function component description files and system operation blueprints; finally, all function components are respectively obtained, blueprint documents are analyzed through a control program of the complex electronic system, virtual channels between logic components are configured, and the logic components are loaded to complete the application integration of the complex electronic system.

The invention relates to a trace dissolved oxygen tester on-line calibrating device and a calibration method thereof. The method is based on the Faraday's law of electrolysis, and the device comprises a fiber filter, a flow control system, a Faraday electrolysis device, dissolved oxygen measurement equipment and a control device. The trace dissolved oxygen tester on-line calibrating device and the calibration method thereof are reliable in design theory, simple and convenient in method and great in operability. According to the trace dissolved oxygen tester on-line calibrating device and the calibration method thereof, field sample water is used, the process of preparing ultra-pure water is omitted, and the process of taking out an oxygen electrode is avoided through on-line calibration. Water electrolysis efficiency is measured on line, so that electrolysis efficiency variation caused by water sample variation and instability of an electrode can be tracked, and the calibration result can be more accurate and reliable. Calculation of electrolysis efficiency of the field sample water is applied to a high precision gauge pressure sensor, and accuracy of electrolysis efficiency calculation is guaranteed.

The invention discloses an optimization design method for an oil casing screwed-joint sealing structure. The optimization design method includes the following steps: 1), creating a parameterized geometric model of the special screwed-joint sealing structure; 2), creating a parameterized finite element model of the special screwed-joint sealing structure; 3), solving the finite element model, determining three optimization design elements, and creating an optimized mathematical model of the sealing structure; 4), performing design of experiments (DOE) on the optimized model, determining optimization solution settings, and solving the optimized model on experiment samples; 5), performing sensitivity analysis on design variables, and fitting a response surface model of sealing performance on experiment sample points; 6) selecting a proper optimization algorithm to perform iteration solution according to the response model; 7), modifying the sealing structure according to a solution result to acquire a structural optimization design result. The optimization design method has the advantages that a structural optimization design philosophy and a finite element analysis method are adopted, and accordingly, optimal design parameter combinations capable of meeting requirements of various working conditions can be achieved.

The invention relates to the technical field of gear machining equipment manufacturing and mainly provides a new method, and a design theory, a working principle and a structural scheme of a multifunctional gear shaping machine which is designed by adopting the method, aiming at solving the defects of the existing oblique inner gear shaping and cutting method and the existing gear shaping machine. Specifically, the invention relates to a method for shaping and cutting oblique tooth gears, which is characterized in that an outer oblique tooth gear follow-up guide method is adopted, and circumferential feeding motion and additional rotation motion are obtained at the same time when a gear shaping cutter makes reciprocating linear motion to form a helical trajectory which is the same as a follow-up outer oblique tooth gear. The multifunctional gear shaping machine which is designed and manufactured by adopting the method is provided with an outer oblique tooth gear follow-up guide additional rotation mechanism and is equipped with a gear rack shaping special sliding table. When the outer oblique tooth gear follow-up guide additional rotation mechanism is connected, inner and outer oblique tooth gears can be machined; when the outer oblique tooth gear follow-up guide additional rotation mechanism is disconnected, inner and outer straight tooth gears can be machined; and when the gear rack shaping special sliding table is installed, straight tooth gear racks and oblique tooth gear racks can be machined.

The invention relates to a batch customizing bra structural design method based on the surface modeling technology, having the specific steps: 1. collecting the breast characteristic parameter example of the young female; 2. definiting five main factors for describing the female breast using the principal components; 3. establishing the human body's necessary parameters for batch customizing bra structural design using the correlation analysis; 4. building the human body's variable linear regression mathematical model suit for the bra mass production; 5. establishing the bra structural design according to the body based on the surface modeling technology. The beneficial effect of the method is: realizing the individuation bra batch customizing sampling design idea, filling up the individuation bra structural design theory blank, which advances the work efficiency, reduces the bra cost of manufacture, solves the paper pattern technical problems of bad bra zoarium nature, satisfies the manufacturing requirement for customizing the bra according to the body.

The invention provides a special polycarboxylate superplasticizer meeting a requirement for 620-m ultrahigh pumping of self-compacting concrete and a preparation method of the special polycarboxylate superplasticizer. For preparation of every 1,000 g of the polycarboxylate superplasticizer, components of raw materials comprise 160-180 g of polyether macromonomers A, 7-19 g of unsaturated carboxylic acid and derivative monomers B of unsaturated carboxylic acid, 4-25 g of unsaturated carboxylate ester and derivatives C of unsaturated carboxylate ester, 0.8-1.3 g of an initiator, 0.3-3.7 g of a chain transfer agent, 0.2-0.4 g of ascorbic acid and 800 g of water. With application of molecular design theories and correlation theories of water solution free radical polymerization as well as introduction of ester groups, the prepared polycarboxylate superplasticizer is enabled to have better fluidity keeping capacity; the polycarboxylate superplasticizer prevents harmful substance emission in a production process, is free of any by-products causing pollution, further, the raw materials have extensive sources and are easy to obtain and low in cost, and a production technology is simple and easy to control. The polycarboxylate superplasticizer has higher water-reducing rate and good slump retaining and water retaining performance, thereby being capable of effectively solving problems of water seeping under pressure, pumping loss and concrete workability loss which are probably produced during ultrahigh pumping of the self-compacting concrete.

The invention discloses a method for evaluating a cooperative transformation of an asphalt pavement material and an optical fiber grating sensor, and relates to a method for evaluating the cooperative transformation of the pavement material and the optical fiber grating sensor. The method solves the problem that data acquired by optical fiber grating sensors embedded in the prior asphalt pavements cannot be directly used for evaluating the stress state of asphalt pavement structures. The method implants the sensor into three middle subsections of a beam specimen by utilizing the characteristics of simple stress of a four-point bending beam specimen, calculates to obtain the theoretical calculation strain according to the deflection and the geometric dimension of a beam based on the assumption of a small-deformation pure elastic beam, modifies acquired data of the implanted optical fiber grating sensor through the theoretical strain obtained by the calculation, provides an evidence for the processing of the acquired data of the optical fiber grating sensors embedded in the prior actual asphalt pavements, and provides an evidence for determining the real stress state of pavement structures, exploring a pavement damage mechanism, perfecting a pavement design theory and a mechanical model, and performing preventative maintenance on the pavement structures.

The invention provides a method for preparing antibacterial diamond-like carbon / hydroxyapatite gradient multi-element nano coating, and belongs to a method for preparing a medical composite coating material. Diamond-like carbon layers and hydroxyapatite layers are alternatively deposited on a metal or an alloy substrate by using an unbalanced magnetron sputtering technology, to finally obtain the diamond-like carbon / hydroxyapatite gradient multi-element nano coating. The diamond-like carbon / hydroxyapatite gradient multi-element nano coating prepared based on a design theory of an inert material + an active material in the invention has such characteristics in a body fluid environment as high hardness, wear resistance, integrated antibacterial and biological activity and the like. The characteristics lie in that the high-hardness and high-density diamond-like carbon coating provides good carrying capacity, abrasion resistance and shielding particle release capacity, and the deposited silver and titanium dioxide doped hydroxyapatite coating can promote the quick formation of new bones on the interface of a human bone tissue and hydroxyapatite and can achieve the purposes of disinfection and anti-infection.

The invention discloses an optimization method of micro-electronic encapsulation thermal expansion coefficient reliability matching which introduces artificial intelligence theory, reliability theory and robust design theory into thermal design of micro-electronic encapsulation; micro-electronic encapsulation thermal expansion coefficient reliability matching and robust optimization based on the fusion of self-adaptive Gaussian neural network, three-level robust experimental design and non-linear finite element, use the thermal fatigue strain for encapsulating main thermal failure parts as the objective function in order to optimally match the thermal expansion coefficient of micro-electronic encapsulation device material under the effect of thermal cycle load, the optimally matched thermal expansion coefficient set is obtained in the design range, thereby reducing the maximum equivalent thermal fatigue strain inside the main thermal failure parts as much as possible. The method can both reduce the thermal mechanical failure rate of micro-electronic encapsulation under the effect of thermal cycle load, and ensure that the thermal expansion coefficient of material enables the encapsulation to maintain in high reliability under the disturbance of the thermal cycle load.

The invention discloses an integrity monitoring method for a slowly growing ramp fault of integrated navigation. For a noise-level slowly growing ramp fault in a conventional integrated navigation system, the method comprises constructing recursive exponential integrity detection statistics by means of a process measurement matrix of satellite navigation-and-inertial navigation-integrated navigation extended Kalman filtering and a system state covariance matrix, setting a recurrence time interval and comparing the detection statistics with a detection threshold under the premise of meeting therequirement on a false alarm rate and a missed alarm rate in navigation operation, and ultimately fulfilling integrity monitoring and sending alarm information to a user in time. The integrity monitoring method for the slowly growing ramp fault of integrated navigation, proposed by the invention, is applicable to single-satellite navigation systems, multi-constellation navigation systems and integrated navigation systems, can realize the integrity of complete robustness of an integrated navigation receiver under a complex electromagnetic environment, and has high theoretical value in integrated navigation receiver designs and engineering application value.

The invention discloses a shock exciting and tamping device and a parameter determination method of a hydraulic tamping machine, and belongs to the field of small-scale internal-combustion power hydraulic tamping machines for railway maintenance, and particularly relates to a forced-vibration type anti-phase shock exciting and tamping device based on an elastic linkage theory. In order to overcome the defects of a conventional eccentric block type shock exciting mode and the forced-vibration type shock exciting mode of a conventional tamping machine, a design theory of single-mass elastic-linkage type vibration is introduced, and a structure form and a parameter design method of a forced-vibration type anti-phrase shock exciting and tamping device based on the elastic linkage theory are provided; the invention aims to solve the problem that the conventional tamping machine cannot achieve anti-phase relative vibration and asynchronous clamping, and can solve the problem that a vibration amplitude of the conventional forced-vibration type shock exciting mode cannot be adjusted, so that tamping effects are improved and the tamping machine is more flexible to apply.

The invention discloses a design method for a microwave cavity band-pass filter, relating to the technical field of microwaves. The design method comprises the following steps of: 1, determining cavity numbers n of a filter according to performance index requirement; 2, obtaining a normalized low-pass component value of the filter according to a filter design theory, and calculating an input-output external Q value and inter-cavity coupling bandwidth; 3, respectively building an input-output structural model and an inter-cavity coupling structural model in three-dimensional simulation software high frequency structure simulator (HFSS) according to a selected filter structural form, comparing a simulation result with theoretical data, and obtaining a structural initial value if the difference between the simulation result and the theoretical data is less than a certain order; and 4, building a complete filter model in the three-dimensional simulation software according to the initial value data, and comprehensively optimizing. Through the combined application of the filter design theory and the three-dimensional electromagnetic field simulation software HFSS, the design efficiency and accuracy of the microwave cavity band-pass filter is improved, thus, the development period is shortened, and cost is reduced.