60 results about "Drop test" patented technology

The invention belongs to the field of aviation structure strength tests, and particularly relates to a testing machine pitching and rolling angle adjusting method and system for a full-aircraft drop test, and the method comprises the steps: adjusting the lengths of a front lifting rope l1 and a rear lifting rope l2 through a first servo motor; the lengths of the adjusted front lifting rope l1 and the adjusted rear lifting rope l2 are calculated through the cosine law according to the geometrical relationship; the lengths of the left lifting rope 13 and the right lifting rope 14 are adjusted through a second servo motor; and the lengths of the adjusted left lifting rope 13 and the right lifting rope 14 can be calculated through the cosine law according to the geometrical relationship. The pitching and rolling postures can be automatically adjusted, and the problems that an existing method is low in efficiency and poor in precision are solved. According to test experience, according to an existing posture adjusting method, replacement needs about half a day to one day every time, the number of times of putting every day does not exceed ten at most, and manual operation is needed on wings or a fuselage every time. And after automatic adjustment is achieved, the target can be achieved in several minutes through adjustment of the motor, efficiency is high, and safety is higher.

This invention discloses a method for identifying vehicle modal parameters based on impact loads, comprising the following steps: S100: designing drop conditions according to the vehicle system's modal characteristics; S200: conducting drop tests on the test vehicle under the designed drop conditions; S300: collecting the vehicle's vibration response during the drop test and calculating the modal energy using the vibration response; S400: identifying modal parameters using the state variable method. This invention utilizes impact loads to excite the modal vibration response of the vehicle system and combines the modal energy method and the state variable method to accurately identify the modal parameters. This invention is simpler, lower cost, and more accurate, effectively identifying the modal parameters of a rail vehicle system without the need for complex simulations and high testing costs.

The present disclosure relates to the technical field of test equipment, and provides a falling test device, which comprises a lifting assembly, a sliding assembly, a containing assembly and a cushion plate assembly; the lifting assembly has a lifting piece and a driving motor in transmission connection with the lifting piece; the sliding assembly is in separable connection with the lifting piece and can move upward synchronously with the lifting piece or freely fall alone after being separated from the lifting piece; the containing assembly is connected with the sliding assembly and has a containing space for containing an object to be tested; the cushion plate assembly is correspondingly arranged below the containing assembly and is used for receiving the containing assembly and detecting the impact load when the containing assembly falls; the driving motor can electrically drive the lifting piece to move upward to a fixed height. The falling test device has the beneficial effects of being able to accurately control the falling height and having high test efficiency.

The utility model discloses a drop test tool. The drop test tool comprises a rack, a material box, a drop mechanism, a pickup mechanism and a visual inspection mechanism, the material box is mounted on the rack; the falling mechanism is installed on the machine frame and provided with a clamping jaw, and the clamping jaw is located above the material box. The picking mechanism is installed on the rack, the picking mechanism is provided with a picking clamping jaw, and the picking clamping jaw can move between the material box and the clamping jaw; the visual inspection mechanism is installed on the machine frame and electrically connected to the picking mechanism. According to the drop test tool, the drop test of equipment can be automatically carried out, manual intervention is reduced, the large-scale and high-frequency test requirements are met, and the test efficiency is improved.

The invention relates to the technical field of test equipment, and particularly discloses a turnover device and drop test equipment, the turnover device comprises a positioning mechanism, a turnover mechanism and a lifting driving member, the positioning mechanism comprises a first positioning assembly, a second positioning assembly and a supporting seat, the first positioning assembly is used for clamping or loosening two ends of a to-be-tested product in a first direction, and the second positioning assembly is used for clamping or loosening two ends of the to-be-tested product in a second direction; the second positioning assembly is used for clamping or loosening the two ends of the to-be-detected product in the second direction; the turnover mechanism comprises a turnover driving part and a turnover grabbing assembly in transmission connection with the turnover driving part, the turnover driving part can drive the turnover grabbing assembly to rotate, and the turnover grabbing assembly is used for grabbing or loosening the tested product; the lifting driving part is used for driving one of the positioning mechanism and the turnover mechanism to be close to or far away from the other one in the vertical direction, the to-be-tested product is positioned through the positioning assembly before and after the to-be-tested product is turned over, and it can be guaranteed that the position of the to-be-tested product grabbed by the turnover grabbing assembly is accurate; and the position precision of the overturned product to be detected is ensured to be reliable.

The utility model relates to a skid -type undercarriage drop test device, including gantry, electric hoist, electromagnet, metal section tool rest, counterweight, the metal section tool rest is used for installing counterweight, and still include the undercarriage installation tool of skid -type undercarriage, electric hoist fixed mounting is below the gantry, is used for driving the lift of electromagnet, the electromagnet can adsorb the metal section tool rest when electrification.

The invention relates to the technical field of hydrogen storage cylinder test detection, in particular to a temperature-controllable gas cylinder accelerated drop test device and method, and the device comprises a lifting platform and a gas cylinder telescopic rotary clamping tool. The gas cylinder telescopic rotary clamping tool and the lifting table are respectively used for clamping a test gas cylinder and supporting the gas cylinder to do vertical accelerated motion, the gas cylinder telescopic rotary clamping tool is fixedly arranged below the lifting table, and the lifting table is provided with a temperature control cavity annular wall inlet and outlet. And the temperature control cavity annular wall inlet and outlet is used for providing an extension and retraction channel for the multi-section annular wall of the temperature control cavity. According to the test device and method, high-energy and high-acceleration drop simulation is realized, an accurate temperature environment simulation function is integrated, all-around and automatic test and safety guarantee are provided, the test flexibility and automation degree are improved, self-verification and feedback optimization capabilities are provided, the test accuracy can be verified, and the test efficiency is improved. And closed-loop optimization of the test process is supported.

The utility model belongs to the technical field of drop test, and particularly discloses a drop detection safety protection device which comprises a bottom table, a frame plate is installed on the outer side of the bottom table through bolts, an opening is formed in the front end of the frame plate, a protection door is arranged in the opening in a sliding mode, and a working platform is movably installed on the surface of the bottom table. A side plate is installed at the end of the rear portion of the working platform, a door opening mechanism and a path groove are arranged on the inner wall of the frame plate, a protruding column and a pushing column are arranged on the surface, close to the frame plate, of the side plate and matched with the path groove and the door opening mechanism correspondingly, and a driving mechanism is arranged in the bottom table. According to the utility model, when substandard objects are broken after a falling test, the driving mechanism drives the working platform to move forwards, and the working platform is in an inclined state after extending out, so that the cleaning and the maintenance are facilitated.

The invention discloses a titanium-based composite undercarriage drop simulation analysis method, and relates to the technical field of aviation, and the method comprises the steps: building a buffer mechanical model of a titanium-based composite undercarriage, the buffer mechanical model covering an air spring force, an oil damping force and a structure limiting force; establishing a rigid-flexible hybrid virtual prototype model based on a multi-body dynamics method, wherein the rigid-flexible hybrid virtual prototype model realizes component integration through geometric modeling, flexible body creation and rigid-flexible coupling processing; carrying out drop test simulation, and obtaining a dynamic response curve of the undercarriage under the impact load through parameter setting and dynamics calculation; through combination of rigid-flexible coupling modeling and drop test simulation, simulation of the drop behavior of the titanium-based composite undercarriage is realized. According to the method, the test cost can be reduced, the research efficiency is improved, and the method has important engineering significance for lightweight and high-performance design of the undercarriage.

A drop test device for a micromechanical component. The drop test device includes a drop body having a shell and having an interior space for receiving at least one micromechanical component.

The application provides a hydraulic lifting adjusting locking device for aircraft landing gear drop test, comprising: a support assembly comprising a base and a support, the support being arranged on the base, the support comprising four first vertical supports, two second vertical supports and a horizontal support; a sliding carriage assembly comprising a sliding carriage body and a guide wheel set, the sliding carriage body being used for carrying a test weight, the sliding carriage assembly sliding along the vertical supports under the guidance of the guide wheel set; a lifting assembly comprising two lifting oil cylinders and two linear modules, each linear module comprising a sliding member and a sliding rail arranged along the second vertical support, the sliding member being arranged around the lifting oil cylinder by a hoop, so that the lifting oil cylinder slides along the sliding rail in the vertical direction; a locking assembly arranged on the second vertical support, the locking assembly locking the sliding carriage assembly when the sliding carriage assembly reaches a preset position; and a safety assembly arranged on the vertical support, the safety assembly positioning the sliding carriage assembly when the sliding carriage assembly is locked.

The utility model relates to the technical field of unmanned helicopter tail beam supporting, in particular to an unmanned helicopter tail beam supporting device which comprises a first supporting pipe, a second supporting pipe and a third supporting pipe and is characterized in that the first supporting pipe, the second supporting pipe and the third supporting pipe are sequentially connected in a sleeved mode, and the bottom of the first supporting pipe is rotationally connected with a connecting base. An adjusting plate is installed on the third supporting pipe, the third supporting pipe is rotationally connected with a connecting rod through the adjusting plate, a first unmanned aerial vehicle tail beam supporting ring is installed at the top end of the connecting rod, and a second unmanned aerial vehicle tail beam supporting ring is installed at the top of the first unmanned aerial vehicle tail beam supporting ring; original elastic connection design (the first spring) is adopted, the supporting pipe forms a compressible flexible joint, actual measurement shows that the structure can absorb about 50% of landing impact force, and empennage composite material damage caused by rigid contact is effectively avoided. The parameters of the spring are optimized through a drop test, and a 120 mm buffer line is provided while the supporting rigidity is guaranteed.

The application belongs to the field of aircraft drop test, and is a method for obtaining the overload of a component based on the acceleration of a full aircraft drop test. The vertical acceleration time history and the touchdown sink speed in the full aircraft drop test are obtained first. The vertical acceleration time history is filtered to obtain the acceleration. The acceleration is integrated to obtain the vertical speed time history. The absolute maximum of the vertical speed time history is taken as the measured drop speed. Whether the relative error between the measured drop speed and the touchdown sink speed is greater than 2% is judged to determine whether it is the required filtering frequency. If yes, the vertical acceleration time history of the concerned component is extracted, and low-pass filtering is performed to obtain the overload of the concerned component. The method provides input for the design of a carrier-based aircraft structure and airborne equipment, is simple and stable, and can effectively remove the influence of high-order elastic modes and high-frequency interference signals.

A method, apparatus, and system provide the ability to perform a drop test using a response surface. Inputs including a target safety factor (T-SF), a drop height, and a computer model, are acquired. An initial template is evaluated by computing a safety factor for a set of orientations, for each model point MP in the computer model across a set of times (t). A minimum safety factor is determined and a response surface for the model is generated. An actual safety factor SFm is generated by conducting a drop test simulation of the model based on a point having the minimum safety factor and a corresponding orientation. Consistency / validity of the actual safety factor is compared to the target safety factor and the model either passes or additional points may be added to the set of points and the process repeats based on an updated response surface.

The invention relates to the technical field of drop test, and discloses a righting tool for a box body, a drop test device and a control method of the drop test device. The righting tool comprises a mechanical arm and a righting executing mechanism. The righting executing mechanism is movably arranged on the mechanical arm. The righting executing mechanism comprises a plurality of supporting claws and a plurality of righting discs. And the plurality of centralizing discs are movably arranged on the plurality of supporting claws in a one-to-one correspondence manner, and the plurality of centralizing discs are used for being attached to a plurality of surfaces of the box body respectively. The mechanical arm is used for driving the righting executing mechanism to move so as to drive the righting discs to move, and the mechanical arm is used for adjusting the position of the box body. According to the box straightening device, the mechanical arm drives the straightening executing mechanism to move so as to straighten the box, manual participation is not needed in the box straightening process, and safety is improved.

The invention discloses a calculation method for coupling of the number of main umbrellas and a resistance coefficient of a reloading air-drop system. According to a large number of test results, the resistance coefficient of the group parachutes is inversely calculated according to the air-drop falling speed, the air-drop weight, the landing field density and the number of the main parachutes in the air-drop test, and the relation between the resistance coefficient and the number of the main parachutes is obtained. The area of a single parachute is selected according to the air-drop weight and the air-drop landing field, when the air-drop weight is larger than 1 ton, the method is suitable for selecting a main parachute of 760 square meters, and when the air-drop weight is smaller than 1 ton, the method is not suitable. Setting an initial landing speed and an initial resistance coefficient, and calculating the number of main umbrellas according to a formula. If the air-drop weight, the landing speed and the landing field change, the number of the main parachutes can be calculated again according to the steps. The method can solve the problem of selection of the number of the main umbrellas during air-drop of the reloading air-drop system.

The invention relates to a drop test device for a micromechanical component comprising a drop body (100) with a shell (110) and with an interior (120) for receiving at least one micromechanical component (1).

This application provides an automatically reset gravity-release locking mechanism for drop testing, belonging to the field of aircraft drop testing technology. It includes a main outer plate of the lock body, a locking claw, a locking tongue, an electro-permanent magnet assembly, a locking block, a fixed guide rail, and a main shaft pin. The top of the main outer plate is connected to a hydraulic lifting actuator. The electro-permanent magnet assembly is located on the upper side of the fixed guide rail. The locking block is sleeved and fixed on a top rod, with its side engaging with the fixed guide rail. One end of the top rod passes through the electro-permanent magnet assembly, and the other end has a locking tongue on its lower side. The two lateral sides of the locking block are connected to the upper end of the locking claw via locking connecting rods. The middle of the locking claw is fixed to the main outer plate of the lock body via a main shaft pin, and the lower end of the locking claw clamps the locking tongue. In the locked state, the locking block connects to the electro-permanent magnet assembly under magnetic force. The connection point between the locking connecting rod and the locking block is lower than the connection point between the locking connecting rod and the locking claw. This solution has a short unlocking response time, low maintenance cost, and improves the efficiency and safety margin of repeated drop testing of the entire aircraft.

The invention relates to the technical field of steel ball drop test, and discloses steel ball accurate drop test equipment and a test method, the steel ball accurate drop test equipment comprises a base, the top of the base is provided with a protection part; and the protection component comprises a fixing plate, the bottom of the fixing plate is fixedly connected with the top of the base, a bearing table is fixedly connected to the surface of the fixing plate, a protective fence is fixedly connected to the top of the bearing table, and a protection frame is fixedly connected to the top of the fixing plate. The extrusion disc is in contact with the rolling rod frame during rotation, the rolling rod frame is pushed to rotate through the inclination of the extrusion disc and rotates towards the outer end of the circular plate at the same time, the rolling rod frame pushes the bent plates to move close to each other when rotating towards the outer end of the circular plate, and the steel balls are clamped when the bent plates move close to each other; and the lower surface of the bent plate is in contact with the lower surface of the steel ball and then holds the steel ball, so that the stability of clamping and fixing the steel ball by the bent plate is improved.

The invention provides a drop test device, which comprises a bracket, and further comprises a mounting frame which is arranged on the bracket in a lifting manner; the clamping assembly comprises a pair of clamping arms movably arranged on the mounting frame and a first driving structure for driving the clamping arms to perform horizontal clamping action; the inclination adjusting assembly controls the to-be-tested box body to rotate around a first axis and a second axis, the first axis and the second axis are horizontal, and horizontal projections of the first axis and the second axis intersect with each other. According to the invention, a large-size box body can be subjected to a drop test, the design requirement and difficulty of the clamp are reduced, the cost is reduced, the drop test is more accurate and comprehensive, the tolerance performance of the box body under various drop conditions can be evaluated, reliable data are provided for product design and quality control, and the product quality is improved. The step of taking the box body of the drop test equipment is reduced, the test efficiency is improved, and the failure rate of the equipment is reduced.

The invention relates to the technical field of drop testing, and discloses a carton drop tester and a carton quality testing method.The carton drop tester comprises a vertical frame, a reciprocating driving mechanism is arranged on the vertical frame, a locking piece is arranged on the reciprocating driving mechanism in a sliding mode, a support is further arranged on the vertical frame in a sliding fit mode, and an unlocking piece and a clamping piece are arranged on the support; the vertical frame is further provided with an overturning piece and a detection mechanism, the detection mechanism comprises a rotating disc and a switching piece, and a plurality of test plates made of different materials are arranged on the circumference of the surface of the rotating disc. According to the carton falling test device, a carton can be limited when falling while a falling test is conducted on the carton, so that accurate test of edges and corners of the carton is achieved, detection of the carton when cargoes are contained in the carton can be simulated, meanwhile, the problem that the carton needs to be clamped again after one edge and corner is formed at the moment is solved, and the carton falling test efficiency is improved. And the carton and the test plate can be automatically turned over, and continuous testing can be carried out.

The utility model relates to the technical field of carton drop testing, and discloses a carton drop testing device which comprises a base, a stand column is fixedly installed on the upper surface of the base, a guide rail is arranged on the stand column in a sliding mode, a first screw is arranged on the stand column in a rotating mode, a first motor is arranged on the top face of the stand column, and a second motor is arranged on the top face of the first screw. Two clamping blocks used for clamping a carton are arranged on the guide rail in a sliding mode. According to the carton drop test device, the protection assembly is arranged on the base, so that during a carton drop test, a fixed protection plate, an auxiliary movable protection plate and a main movable protection plate in the protection assembly can form a protection cover body, an additional safety barrier is provided, and the risk of accidents in the test process is reduced; and articles in the carton can be prevented from being splashed out due to impact force, so that a tester can be protected from being injured by the splashed articles, and the accuracy and reliability of the test can be ensured.

The application provides a drop test assembly and a method for simulating attitude deflection angle and angular velocity of drop test, which first adopts three-point suspension of a test piece by a sling, and obtains the angular velocity of the test piece by gravity acceleration through a delay control unlocking method to unlock one of the slings; then uses a test piece attitude and angular velocity simulation parameter calculation method to obtain initial state parameters, delay control waiting time parameters and limit protection lock length parameters; according to the delay control unlocking method flow, the timing unlocking of the suspension cable release device and the overall suspension system release device is realized, and finally the drop test considering the test piece attitude deflection angle and angular velocity is realized; in addition, the limit protection cable is set and the limit protection lock length parameters are calculated to avoid the risk of test piece overturning in the delay control unlocking.

The invention discloses a multi-climate drop test platform for an aircraft landing gear. The multi-climate drop test platform comprises a clamp, the landing gear, a friction wheel, a driving motor, an aircraft wheel, a drop platform, a climate control device, a sensor group and a high-speed camera. Through the climate control device, the problem that landing gear drop under multiple climate conditions such as high temperature, low temperature and icing cannot be simulated in an aircraft landing gear ground drop test is solved; through various types of sensors, data in the falling process of the undercarriage is collected in an omnibearing and multi-angle mode, and a data basis is provided for subsequent performance analysis and verification of the undercarriage; the platform is small in occupied area, simple in structure, easy to operate and low in manufacturing cost, can be introduced by schools to serve as a practice teaching aid for aviation major students, and promotes knowledge learning of the aviation major students.

The utility model provides a hanging device of a drop test machine, which comprises a base, the upper surface of the base is connected with a support, the upper surface of the support is provided with a rotating motor, the inner wall of the support is embedded with symmetrical bearings, the inner rings of the two bearings are jointly connected with a threaded rod, and the threaded rod is connected with a rotating shaft. The output end of the rotating motor is connected with the top end of the threaded rod through a bearing. According to the utility model, the threaded rod is driven by the rotating motor, the height of a sample can be adjusted, different drop height test requirements are met, the movable plate is pushed by the electric push rod to slide in the movable frame, the horizontal position of the sample can be adjusted, so that the drop position is adjusted, and the sample falls into the bearing bin, so that the pressure sensor is impacted; the impact force signal is collected in real time, and the digital processing of the control system is combined, so that the dynamic monitoring and storage of test data are realized, and the traceability and analysis efficiency of the result are improved.

The present invention relates to a device for performing a drop test, preferably for testing the landing gear of an aircraft, comprising a test stand, a sled for the controlled drop of a test specimen, and a base plate, wherein at least one means for digital measurement acquisition, preferably an optical measuring system, is provided, which is designed to perform a measurement of at least one property of the device and / or the test specimen during the drop test. Using the optical measuring system, additional information, for example regarding stiffness and deformation, can be acquired during the drop test itself, thus eliminating the need for additional tests to obtain this data.

According to the configuration method for the power system of the solid rocket engine air-drop test platform, the problems of rapid estimation of the explosive load and configuration of the power system at present are solved. Comprising the following steps: determining an initial state of an air-drop test platform; determining related aerodynamic characteristic parameters of the air-drop test platform; estimating the structural mass, the load mass, the engine structural mass and the propellant charge mass of the engine of the air-drop test platform, and calculating the take-off mass of the air-drop test platform, the mass of the air-drop test platform after the engine finishes working and the mass of the air-drop test platform after the engine is separated; establishing a thrust impulse balance equation; estimating the time from takeoff to an air-drop test window; the propellant charging mass is solved; and selecting the solid rocket engine according to a calculation result. According to the method, the propellant charge of the solid rocket engine can be rapidly estimated, engine parameters are reasonably configured, and it is ensured that an air-drop test platform efficiently and reliably carries out overall scheme design.

This application provides a drop testing device and method for hollow blocks. The drop testing device for hollow blocks includes a clamping mechanism, a posture adjustment mechanism, a release mechanism, and an impact surface mechanism. The clamping mechanism includes at least two pairs of clamps, one of which is higher than the other. At least one of the at least two pairs of clamps operates to clamp hollow blocks in corresponding postures. The upper clamp in a pair is connected to the posture adjustment mechanism, which drives the upper clamp to move to a clamping position corresponding to the posture of the clamped hollow block. The lower clamp in a pair is connected to the release mechanism, which drives the lower clamp to release the clamp from the hollow block, allowing the hollow block to fall freely in its clamped posture. The impact surface mechanism is located below the clamping mechanism. This application provides strong traceability and an extremely short feedback cycle for the anti-breakage performance of hollow blocks.

The invention discloses a helicopter bucket throwing water distribution test system and a test method, and solves the problem that in the prior art, accurate throwing measurement of a helicopter bucket is convenient to test. The device comprises a drainage device, and further comprises a throwing device, a temperature detection device, a mobile workstation and a plurality of adjusting brackets which can be assembled with one another, the adjusting support is provided with a fire scene simulation device or a throwing amount testing device, and the mobile work station is connected with the throwing device and the temperature detection device. The drainage device is arranged on the throwing device and used for throwing the fire extinguishing agent. Through cooperation of the drainage device, the throwing device, the temperature detection device, the mobile work station, the adjusting support, the fire scene simulation device and the throwing amount testing device, the fire extinguishing agent throwing deposition condition and the fire extinguishing agent throwing distribution condition can be collected, and therefore data support is provided for the actual fire extinguishing process.