160results about How to "Reduce test costs" patented technology

The invention relates to a delamination propagation behavior simulation method of a composite material multidirectional laminated plate on the basis of a cohesion model. The method includes the following steps that (1) a geometric model is built according to structural parameters of a composite material multidirectional laminated plate test piece, (2) key parameters capable of reflecting interfacial behaviors are calculated, and material attributes are respectively set, (3) meshing is carried out on the geometric model of the composite material multidirectional laminated plate test piece, a module is assembled, and a three-dimensional finite element model is built, (4) a load and boundary conditions of the finite element model are determined according to practical situations and the load state of a composite material structure, (5) the finite element model based on the cohesion model is calculated and analyzed, a load displacement curve of a loading point is extracted, delamination propagation behaviors of the composite material multidirectional laminated plate are simulated to obtain the largest load value of the load displacement curve, and damage behaviors of the multidirectional laminated plate are predicted.

The invention relates to a method for fast assessment on bearing capacity of a bridge based on a moving load test. The method is characterized by comprising the steps of 1 determining loaded vehicles and monitoring point arrangement, 2 arranging sensors in a field according to a monitoring point arrangement scheme, 3 driving the vehicles in the field and acquiring dynamic response of the bridge, 4 extracting the dynamic response of a bridge structure, 5 calculating static response and calculating static deflection and static strain according to maximum dynamic deflection, maximum dynamic strain and power increasing coefficient extracted according to a dynamic response curve of the bridge, and 6 assessing the bearing capacity of a tested bridge. The moving load test is conducted on the vehicles under the static load test condition at certain speed, so that acquired dynamic response is converted into static response by utilizing a formula, then the static response is compared with a theoretical calculating value and a relevant specification specified value, and further the bearing capacity of the bridge structure is assessed according to current specifications. The method for fast assessment on the bearing capacity of the bridge based on the moving load test has the advantages of saving time and labor and basically having no influence on traffic.

The invention relates to high-frequency combustion instability coverall process simulation test automatic regulating system and method. The system comprises a control system, a combustor, a heat exchanger, an alcohol vaporizer and a combustion chamber, wherein the control system is used for regulating working conditions in the combustion chamber by a parameter input and flow regulating valve; the combustion chamber is an engine head with real size, an oxidant inlet and a fuel inlet of the combustion chamber are respectively communicated with the heat exchanger and the alcohol vaporizer, the oxidant inlet of the combustion chamber is provided with a sound velocity pore plate, a pressure measuring point and a temperature measuring point; the fuel inlet of the combustion chamber is provided with a sound velocity pore plate, a pressure measuring point and a temperature measuring point; and a cold air inlet of the heat exchanger is provided with a cold air flow regulating valve, and a heatsource of the heat exchanger is a combustor. The invention solves the technical problems of high cost, long period and poor safety property caused by adopting a real engine and a real working condition in the traditional simulation test, is very low in test cost, and lowers economic and labor costs.

The invention discloses a simulated test device for seepage of underground water and a simulated test method; the test device comprises a cylindrical drum, a substrate water tank, a water supply tank and a control valve, wherein the substrate water tank is arranged at the bottom of the cylindrical drum and is communicated with the water supply tank through the control valve and the water supply pipe; the water supply tank is a lifting adjustable water tank; the substrate water tank is arranged on a support; a drainage valve is arranged at the bottom of the substrate water tank; and the test method comprises steps of sampling point selection, sample soil collection, sample soil pretreatment, cylindrical drum filling, soaking test on underground water, collection of polluted water sample, water sample analysis and calculation of polluted output quantity. The simulated test device of the invention is convenient for collecting water sample in a layering way, provides basic data such as water quality, water yield and the like for the research of underground water pollution law and achieves the purpose of simulating the state and law of the underground water pollution. The test method is simple and convenient; equipment is convenient to operate; and test cost is low. The invention is suitable for test environments that the temperature is 4-45 DEG C, and the constant pressure pH is 6.5-8.5.

The invention relates to an erosion corrosion test device of a seawater piping system metal member, comprising a fluoroplastic centrifugal pump and a water storage tank, wherein the inner side wall of the water storage tank is provided with a cooling system; the inlet of the fluoroplastic centrifugal pump is connected with the water storage tank, and the outlet main line of the fluoroplastic centrifugal pump is connected with a plurality of parallel-connected working pipelines; each working pipeline is sequentially connected in series with a flow regulating valve, a vortex street flowmeter and a working pipe section; the outlet ends of the plurality of parallel-connected working pipelines are communicated with the water storage tank through loops; the outlet main line of the fluoroplastic centrifugal pump is also provided with a by-pass; the by-pass is communicated to the water storage tank; and the working pipe section is also electrically connected with an electrochemical test device. The erosion corrosion test device can realize the erosion corrosion resistant property tests of different pipe samples under approximately completely consistent test conditions of a same medium, same temperature, same flow velocity, and the like and can also be used for researching the erosion corrosion resistant property of a same material under the conditions of different mediums and flow velocities.

The invention relates to a low-cost radar seeker semi-physical simulation test platform. The low-cost radar seeker semi-physical simulation test platform comprises a radar seeker, a turntable, a simulation computer, a target echo signal simulator, a target motion control system, a power amplifier component, a waveguide stimulation head, a FPGA (Field Programmable Gate Array) delay trigger module, a signal source and a target motion bracket, wherein the radar seeker is mounted on the turntable, the turntable is in control connection with the simulation computer, the target echo signal simulator is connected with the simulation computer, and the target motion control system, the power amplifier component and the waveguide stimulation head are connected. Compared with a common radio frequency semi-physical simulation test platform, the low-cost radar seeker semi-physical simulation test platform saves an anechoic chamber and radio frequency store-and-forward equipment, the simulation and test costs are greatly lowered, the construction period of a test system is shortened, and the development condition of the radar seeker and the development efficiency are improved.

The invention discloses a rigid body mode testing method for a powertrain mounting system under the loading condition. In the method, a heavy object is hung on a powertrain mounting device under the loading condition; and a rope for hanging the heavy object is cut to suddenly release the force acted on the powertrain mounting device so as to excite the free vibration of the powertrain mounting device and immediately trigger a data acquisition unit to record and store the data on a vibration transducer at the moment. A rigid body mode of the mounting system is tested by the method and the obtained each-order natural frequency and decoupling rate are the actual and real natural frequency and decoupling rate of a tested vehicle, so that the method tests the performance of the vehicle most directly, really and reliably. The testing method can be performed on any entire vehicle, only a proper number of heavy objects is needed, and the design and processing of a test bench are avoided, so that the testing cost is basically avoided. Obviously, the testing time and the testing cost are greatly saved.

The invention relates to a method for testing specific heat capacity of a lithium ion battery. The method comprises the following steps: measuring and recording open-circuit voltage and surface temperature of the battery in different SOC (State of Charge) states till the SOC of the battery is equal to 0, performing regression analysis on data representing that the open-circuit voltage of the battery changes along with the surface temperature in the different SOC states, so as to obtain a fitting relationship equation of the open-circuit voltage, open-circuit voltage temperature coefficients and different discharge times of the battery, calculating the open-circuit voltage and the open-circuit voltage temperature coefficients at different recorded time points in corresponding discharge by using the relationship equation, calculating heating power of the battery in discharge at each time point, calculating a released thermal value, calculating the SOC states of corresponding moments according to the discharge time and the discharge power so as to obtain the specific heat capacity in the different SOC states. The change of the specific heat capacity of the battery along with the SOC is obtained by using a method with the combination of experimental testing and statistics calculation, and the method is simple and convenient to execute, low in testing cost and wide in application range.

The invention discloses an economic and efficient opening direct current type ice wind tunnel, which comprises an air inlet, a power section, a diffusion section, a stabilization section, an ice and snow particle generating section and a test section in sequential connection, wherein a liquid nitrogen spray head and a pneumatic spray head are arranged in the ice and snow particle generating section, the nitrogen spray head is connected with a liquid nitrogen source through a liquid nitrogen pipeline for forming a liquid nitrogen refrigeration system, and the pneumatic spray head is connected with a pressure air source and a pressure water source through a mixing pipeline for forming a water particle generating system; a fan is arranged in the power section. The economic and efficient opening direct current type ice wind tunnel has the advantages that the process is simple, the single-time test cost is low, the test efficiency is high, and the manufacturing cost is low. The defects that the large-scale ice wind tunnel needs to be provided with large-scale refrigeration deicing equipment, the cost is high, and in addition, the test period is long are overcome. The requirements of ordinary ice and snow particle fluid teaching and scientific research and experiments can also be met.

The invention relates to the technical field of aviation ground facilities, and in particular relates to a test car used for testing a rodless airplane tractor. The test car is characterized in that the test car is provided with a load-bearing platform, wherein the load-bearing platform is provided with a cab, a power control system, a hydraulic control system and an electrical control system; the upper end of the load-bearing platform is provided with a balance weight assembly; the lower end of the load-bearing platform is provided with a support wheel group; and the front end of the load-bearing platform is provided with a nose wheel device. Because of adopting the structure, design parameters of the rodless airplane tractor, such as torsion, over turn, traction force and the like, can be detected; the weight and the inertia, the front undercarriage weight and other parameters of various airplanes can be simulated; the traction capability, the elevation capability and the safe protection performance of the rodless tractor can be detected; the performance parameters of the various airplanes are verified on one set of detection equipment; the potential defects existing in the design and production process of the rodless airplane tractor can be reduced; the product testing capability of tractor manufacturers can be enhanced; and various potential safety hazards can be eliminated for airports and airlines.

The invention discloses a preparation method of an experimental model of in-situ columnar joint rock. The method comprises the following steps: selecting a to-be-studied columnar joint rock mass area in an engineering field, and cutting in a direction perpendicular to the axial direction of column bodies to obtain column body sections in the area; obtaining sketches of a plurality of irregularly polygonal joints in the corresponding area; scaling the sketches according to the similarity ratio of (10:1)-(25:1) to generate corresponding moulds, generating column body models by adopting a material which has physical-mechanical properties similar to those of the prototypes, and gluing the column body models to form a cubic model; and curing the cubic model, then cutting and polishing the cubic model to obtain a sample with a standard size, and finally performing a physical-mechanical experiment on a joint rock mass on an indoor experimental instrument. According to the preparation method of the experimental model, the similar model is prepared for indoor experiments under the actual conditions of the field and on the premise of following a similarity principle, the difficulty of an in-situ experiment is solved, the authenticity is kept, an experiment result can be provided as a basis for engineering calculation and study, a high practical value and good economic benefits are achieved, an extra experimental instrument design is not needed, and the experimental cost is low.

The invention relates to a dynamic measuring equipment for compound gun perforator in oil and gas well. It has a simulating target, which comprises cylinder, casing target in the cylinder cavity, cement ring and simulating target. There is a first cavum with fluid between the peripheral face of simulating target and the inner wall of cylinder. One container is set on the simulating target. Pressure measuring hole, in which first and second sensors are set, and pinhole for initiating line, which are connected with the cavum of container, is set on the wall of container. One simulating compound gun perforator cell is set in said container and there is a second cavum with fluid among the gun body of gun perforator, inner wall of said container and said casing target. Said pressure measuring hole, in which a first sensor is set, is connected with the inner of gun perforator by a protecting cover and the pressure measuring hole, in which a second sensor is set, is connected with said second cavum with fluid. The invention can measure the dynamic curve of pressure-time in the inner and annulus of compound gun perforator on the ground.

The invention discloses an indoor model test method for side slopes or landslides, and belongs to the field of indoor experimental research of geotechnical engineering. According to the method, a model is produced in the box body of a model box; a reaction force beam (5) is adjusted to a suitable position by adjusting a nut (6); a loading module comprising a bidirectional hydraulic jack (1), a force sensor (2) and a fixing member (4) is adjusted to a suitable position; other sensors are arranged; and a hydraulic control system is started. According to the present invention, the converting of the loading mode is convenient, wherein the first horizontal loading mode is converted into the second horizontal loading mode by only adjusting the positions of the corresponding nut and the loading module, and the horizontal loading mode is converted into the vertical loading mode only by disassembling the whole reaction force frame, connecting the whole reaction force frame to the vertical connection member of the box body and adjusting the positions of each corresponding nut and the loading module.

The invention discloses a kit for detecting a related immunophenotyping of B-cell acute lymphoblastic leukemia and forms classification equipment of a related immunophenotyping of leukemia with a seven-color flow cytometry. The kit is configured with the following monoclonal antibody reagent combinations: CD58, CD10, CD34, CD123, CD38, CD19 and CD45, and fluorescein is respectively marked according to front and back sequences as follows: FITC (fluorescein isothiocyanate), PE (pulmonary embolism), PerCP-CY5,5, PE-CY7 (phycoerythrin-CY7), APC (adenomatous polyposis coli), APC-Cy7 and PacificBlue. With the adoption of the kit disclosed by the invention, whether the seven marks are normal or not can be simultaneously observed, and the sensitivity and the accuracy of the detection are increased; further, immunophenotyping information in morbidity can not be relied on, so that the range and capacity of the LAIP (leukemia associated immunophenotyping) analysis are expanded, the early-stage conditions of the analysis are simplified, and more chances are provided for clinical detection of MRD (minimal residual disease).

The invention relates to an automobile steel plate spring stiffness checking method which belongs to the field of automotive suspensions. Steel plate spring stiffness directly influences the performance of a suspension, but an accurate stiffness checking method does not exist. According to a mechanical model of an automobile steel plate spring, a steel plate spring stiffness checking method is established by virtue of an energy principle and a superposition principle. The established steel plate spring stiffness checking method adopts an analytical calculation method which can be used for accurately checking the steel plate spring stiffness compared with the conventional common curvature method, so that the development efficiency is improved, lots of experimental costs are saved, and the method points a direction for the design of the steel plate spring. The method can be used for design of the automobile suspension steel plate spring.

The invention provides a wing pneumatic load follow-up loading device. The device comprises a load actuator and a follow-up device. A wing angle displacement sensor which can detect a load applying point deformation angle is arranged at a load applying point of a wing test component. The load actuator is provided with a force sensor which can detect a size of a force applied to the wing test component. A bottom of the load actuator is fixed to the follow-up device. The follow-up device can push and pull a bottom end of the load actuator so that an axis of the load actuator and a normal of the load applying point are superposed. The follow-up device is provided with an actuator angle displacement sensor which can measure an angle change of the axis of the load actuator relative to the follow-up device. The follow-up loading device adopts a passive mode to carry out follow-up loading of a load under the condition that wing deformation is unknown so that real simulation of a pneumatic load size and a direction when a high-aspect-ratio long straight wing generates large deformation during a test process is realized.

The invention belongs to the technical field of bearing test detection, and provides a loading device for an automobile hub bearing periodicity dynamic tester. The loading device comprises an axial loading mechanism and a radial loading mechanism. Hub bearings (10) are arranged at the cantilever ends at the two ends of a tester spindle (6), outer rings of the hub bearings (10) are fixedly connected with automobile steering knuckles (44), and the automobile steering knuckles (44) are connected with loading arms of the loading mechanisms; the two loading arms are symmetrically arranged at the two ends of the test spindle and correspond to the hub bearings respectively. According to the loading device, loading accuracy can be guaranteed, and stability of the whole device in the operating process is guaranteed.

The invention relates to a general valve design optimization method which comprises the steps of: establishing a solid model, and establishing a corresponding finite element model; performing stress and strain analysis, judging the safety performance of a to-be-optimized valve according to an analysis result, and judging the probability of optimization; establishing a flow channel model and carrying out flow field optimization; calculating Reynolds number according to the flow channel model, and selecting an analysis model according to the Reynolds number; carrying out grid division on the analysis model, setting boundary conditions, and carrying out flow field analysis; carrying out noise analysis on a valve body according to a velocity field and a pressure field, judging whether the noise of the valve body is qualified according to a noise analysis result, if the noise is too big, optimizing a flow channel structure and a valve cavity body in sequence, reestablishing a valve solid model, and carrying out stress and strain analysis on the valve body again; or otherwise, finishing valve body optimization. The method can greatly reduce the experimental cost and effectively shorten the experimental cycle, and can be widely applied to the field of valve design.

The invention relates to the field of test systems, and aims to provide a multifunctional component gas fatigue test system. The multifunctional component gas fatigue test system includes a supercharging device, a recovery tank, a gas cylinder, a refrigeration heating machine, a high-low temperature environment box, an anti-explosion fan, a gas leakage detector, a vacuum pump, stop valves and a control system, and can perform a gas tightness test, a fatigue test and the like on a test component. The multifunctional component gas fatigue test system provided by the invention realizes a function of a gas cycle fatigue test of a component, and can perform a pressure maintaining test and fatigue test and the like; realizes reutilization of tail gas, thereby reducing test cost; realizes testing of a large pressure range, thereby satisfying requirements of different component test pressure; realizes isolation of a heat exchange medium and test gas, thereby guaranteeing safety of a device and personnel, and improves heat exchange efficiency through the environment box and the anti-explosion fan; and realizes testing functions of various components, thereby increasing the range of application of the test device.

The invention provides an engine plateau heat balance performance simulation test method. The test environment conditions of an engine at the altitude of 0-5500m can be simulated, change of engine coolant temperature and flow is respectively controlled by a coolant temperature and flow control method, and engine heat balance performance testing under different altitudes and different working conditions is performed and the optimal coolant temperature MAP and the optimal coolant flow MAP of the engine under different altitudes and different working conditions are acquired. The coolant temperature control range is 50-120 DEG C and fluctuation is less than +/-0.5 DEG C; and the flow control range is 0-400L/min and fluctuation is less than +/-1%. According to the method, engine coolant temperature and flow can be accurately adjusted in real time according to the test requirements so that adjusting precision is high, adjusting range is wide, and waste of large amount of time for achieving a test temperature point in the heat balance test can be avoided. Meanwhile, a platform and the method are provided to acquisition of the engine coolant optimal temperature and flow MAP under the condition of high altitude.

The invention belongs to the technical field of ballistic tests and particularly relates to the projectile high-speed loading technology. According to the technical scheme, an accelerating projectile support for a non-empennage projectile body comprises a projectile support body (1) composed of 2-4 clamping petals in a sticking manner and a bottom pusher (4). Stable loading and launching of a launching body tube with the length ranging from 10 mm to 30 mm are adopted for the non-empennage projectile body with the length-diameter ratio ranging from 3 to 7, reliability of high-speed loading tests of the projectile body is improved, and the test cost is lowered. Stretching of the clamping petals and stable separation between the projectile body and the clamping petals are achieved in the projectile flying process through aerodynamic force and an inverted-conical structure at the front end, and a good target touching posture of the projectile body is ensured while the machining difficulty is lowered. Due to the rigid bottom pusher, it is ensured that the projectile body cannot be seated backwards when being launched, chamber pressure directly acts on the bottom pusher, the bottom pusher pushes the projectile support to move through a positive conical face and pushes the projectile body to move through an upper surface, it can be avoided that angles of attack are generated during fragment flying, and damage to the launching body tube can also be reduced; and good universality is achieved.

The invention discloses a near field simulator. Near-field spherical wave-front simulation is realized based on compact-field de-focusing control. Through continuous adjustment of the de-focused irradiation of an excitation source on a reflection plane, equivalent spherical wave sources at different distances are simulated continuously, with the purpose of compactly realizing a near-field electromagnetic environment with large distance coverage to conduct a near-field simulation test on a radio system. The near field simulator can work in a more controllable natural environment or electromagnetic environment, and is conducive to improving the test conditions of electromagnetic simulation debugging, reducing the test cost and improving the test efficiency. The near field simulator is better than an external field largely affected by natural weather. The near field simulator can work at the position of a wider-range equivalent spherical wave source, and is conducive to dynamically and variably configuring a near-field wave-front required for test and conducting a simulation test on a more vivid and changeable near-field electromagnetic environment required. The near field simulator is better than a near field of which the transmitting and receiving distance is controlled directly.

The invention relates to a testing device and method for a compression deformation modulus and strength of a soil body in a deep hole. Load plate test is the most direct and reliable way for evaluating engineering foundation state; however, no device is available for an in-hole load plate test at present. According to the testing device, a supporting ring is coated with a hydraulic rubber film; the supporting ring is assembled on a supporting plate outside a bottom center pipe; then a jack and a pressure sensor are connected with the top of the bottom center pipe and a displacement sensor is fixed on the supporting ring; a top center pipe is coated with an air pressure rubber film and upper and lower cover plates are fixed; a testing system is arranged; and an air pressure pump and a hydraulic pump are started to record measured values of the pressure sensor and the displacement sensor. According to the testing device and method, an independent in-hole load plate testing system is composed of an air pressure friction reaction-force device, a loading device and the testing device; a supporting reaction force for supporting is provided for the system by friction between the air pressure film and the hole wall; the settlement amount of the load plate is directly measured by a measuring sensor and in-hole load plate testing is realized.

The invention discloses a rail vehicle wheeltrack relationship test bench. The bench comprises a rail wheel device, a wheel suspension device, a loading device, a measuring device and a control system, the rail wheel device simulates an actual steel rail; the loading device applies a load to the test wheel, the wheel suspension device transmits the load to the test wheel, the measuring device collects data of other devices and sends the data to the control system, the control system calculates the collected data and obtains a test result, automatic operation of the test is ensured, and the risk of manual control errors is avoided. The bench can be used for carrying out various tests in the wheel-rail relation field. Compared with the prior art, the test cost is reduced on the premise thatthe requirement for the highest test speed is met, in addition, the test bed can simulate line disturbance in the test process, the running state of wheels is close to the actual running state, the test result has higher reference value, and meanwhile the test requirements of various rail vehicles are met.

The invention discloses a flowing gas humidity control device. The flowing gas humidity control device comprises a gas source and a humidifying system, wherein the humidifying system is used for mixing gas of the gas source into humidified gas used by a testing device. The flowing gas humidity control device further comprises a humidity sensor and a humidifying loop system, wherein the humidity sensor is used for detecting the humidity of the humidified gas, and the humidifying loop system is used for returning the humidified gas which fails to reach the standard during detection to the humidifying system for remixing. According to the flowing gas humidity control device, the additionally arranged humidity sensor can detect the gas which fails to reach the standard in real time, the additionally arranged humidifying loop system can return the gas which fails to reach the standard to the humidifying system for remixing so that the remixed gas can be used for testing needs, through the reutilization, waste of gas resources is reduced, and the testing cost is lowered; moreover, the possibility that the toxic gas which fails to reach the standard leaks is lowered, and the safety of testing operators is guaranteed.

The invention provides a pretreatment device and a pretreatment method for transformer oil. The pretreatment device comprises an electromagnetic valve, a ball valve, an oil tank, an oil cylinder, a circulating pump, a vacuum pump, an oil-gas separation chamber, a pressure sensor, a stepping motor, an air and nitrogen interface, an oil inlet and an oil outlet, wherein the oil inlet is connected with the oil tank, the oil cylinder and the circulating pump through four-way pieces, the oil cylinder is respectively connected with the oil tank, the oil-gas separation chamber and the pressure sensor, the ball valve is arranged between the oil tank and the oil cylinder, a piston of the oil cylinder is fixedly connected with the stepping motor through a mechanical device, the bottom of the piston is connected with the oil outlet, and the oil-gas separation chamber is connected with the air and nitrogen interface, and connected with the vacuum pump through the electromagnetic valve. According to the pretreatment device and the pretreatment method, the transformer oil is pretreated by introducing three degassing methods such as vacuum atomization degassing, air cleaning and nitrogen cleaning, so that the deficiency of cleaning and degassing effects of various methods can be made up, and residual gases dissolved in original transformer oil can be eluted efficiently.

The invention discloses a submarine landslide and debris flow small simulation water tank and a test method. The bottom of a water tank is provided with guide rails, the bottom of the water tank is provided with horizontal adjusting truckles, the horizontal adjusting truckles are in brake states after the water tank is in place, the guide rails are provided with cushion blocks at intervals, a plurality of modular base plates are arranged on the cushion blocks, the cushion blocks are arranged from low to high to enable the plurality of modular base plates to be connected to form a landform withan inclination angle, the bottom of one end of the lower position of the landform, close to the water tank, is provided with a drain hole, a separating block with a filtering screen is arranged between the drain hole and the guide rails, the modular base plates comprise a flat straight base plate with a rectangular hole at one side, a flat straight base plate, a base plate with a convex structure, and a flat straight plate with a groove connected in sequence, a water-inlet pipe is arranged at the rectangular hole of the flat straight base plate with the rectangular hole, a triggering box is arranged on the flat straight base plate with the groove, and the triggering box is provided with a pulling door. The beneficial effects are that the test consumption is reduced, and the test efficiency is improved.

The invention provides a vacuum thermal test method of a mass production satellite constellation system. A plurality of satellites are put into space environment simulation equipment simultaneously, thermal balance satellites and thermal vacuum satellites are selected correspondingly, and thermal control states of the thermal balance satellites are worse than that of the thermal vacuum satellites;a thermal balance test is carried out on the thermal balance satellites; during the process of the thermal balance test, equipments on the thermal balance satellite is powered up according to an in-orbit established working mode, and external thermal flow is applied to the surfaces of the thermal balance satellites according to external thermal flow design parameters; the external thermal flow ofthe thermal balance satellites is corrected in real time by simulating the influence of the mutual occlusion of the satellites on the external thermal flow of the thermal balance satellites; and during the process of the thermal balance test, the equipment on the thermal vacuum satellites is powered up according to an in-obit established working mode, and no external thermal flow is applied. After the thermal balance test is completed, the high and low temperature range of a thermal vacuum test of the satellite system is determined according to thermal balance test results, and the thermal vacuum test of the tested satellite system is carried out.

The invention relates to a method for rapidly and quantitatively evaluating spaceflight fuel performances, and relates to a method for rapidly detecting a main curve of tensile strength for unidirectional stretching of a solid propellant. The method comprises eight steps of: analyzing a relation between a dynamic energy storage modulus and a setting, calculating a relation between a stress relax modulus and a setting temperature, drafting a difference graph of a main curve of the dynamic energy storage modulus to a main curve of the stress relax modulus, detecting tensile strength of unidirectional stretching, obtaining a dynamic frequency value, obtaining a dynamic energy storage modulus value, obtaining a tensile strength value of unidirectional stretching, and drafting a main curve map of tensile strength of unidirectional stretching. By detecting the main curve of the dynamic energy storage modulus and the main curve of the stress relax modulus of the solid propellant, and based on a relative formula, the dynamic tensile strength value and the main curve of the tensile strength of the unidirectional stretching are obtained at any temperature and any stretching speed. The method is widely used for rapidly detecting fuel performances of the solid propellant, and has advantages of short detection process, low consumption sample, low test cost and good data repeatability.

The invention relates to an energy recovery damper, in particular to an energy recovery damper for an electromagnetic coil launcher. The energy recovery damper for the electromagnetic coil launcher mainly recovers accelerating armatures and converts the kinetic energy of the accelerating armatures to electrical energy for storage; one or a plurality of coil windings are arranged in the last level close to the multi-level accelerating windings; the one or the plurality of coils are enabled to be connected in series with a diode, a capacitor and a resistor, so as to form a closed loop. The energy recovery damper for the electromagnetic coil launcher has the following advantages: the energy recovery damper for the electromagnetic coil launcher can recover naturally dissipated energy in launchers of the conventional multi-level coil launching devices, so as to allow related experiments to utilize the energy; the experimental cost is reduced and the energy use efficiency is improved; the energy recovery damper for the electromagnetic coil launcher is provided with significances of energy conservation and environmental protection; besides, the energy recovery damper for the electromagnetic coil launcher decelerates the launchers moving at a high speed, and enables the speed reduction of the launchers moving at a high speed to be more remarkable in the same motion process, thereby being significant for general scientific research and experiments.