13 results about "Drop test" patented technology

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 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.

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.

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 application discloses a kind of big anti-reverse angle aircraft principle prototype whole machine drop test method and device, specifically relates to a kind of method and test device for achieving principle prototype in drop test with original aircraft landing dynamic process time consistent.In the basis that small size principle prototype can be realized lifting and releasing, cooperate with the loading method of scaled gravity acceleration and the application method of air power, the dynamic response of the time period of main landing gear landing to front landing gear landing in principle prototype landing process can be realized equivalent simulation, to realize the whole machine drop test under limited field.The technical scheme of the application is: including lifting and releasing device, scaled gravity acceleration applying device, air power applying device and force platform;The application can realize the consistency of small size principle prototype in the time period of main landing gear landing to front landing gear landing with original aircraft.

The application discloses a kind of packaging barrel detection system and detection method, including test cabin, test cabin side is provided with open-close door, the top of test cabin is installed with track unit, five mobile units are hung and installed on track unit, and the lower end of five mobile units is respectively installed with liquid injection mechanism, air tightness detection mechanism, hydraulic test mechanism, drop test mechanism and stacking test mechanism;The bottom of test cabin is also installed with conveying unit, and conveying unit includes rotary conveying weighing table, and a plurality of first conveying devices are arranged around rotary conveying weighing table.The application can carry out air tightness detection, hydraulic test, drop test and stacking test to packaging barrel by air tightness detection mechanism, hydraulic test mechanism, drop test mechanism and stacking test mechanism, and can inject liquid to packaging barrel by liquid injection mechanism, so as to test the hydraulic, drop and stacking performance of packaging barrel in actual use.

The utility model belongs to the technical field of drop test equipment, and particularly relates to a drum-type drop test machine which comprises a working box, and a controller is arranged at the upper part of the front side of the working box; the rotating shaft is rotationally assembled at the right upper part of the working box; square sliding grooves are formed in the sides, close to each other, of the two assembly boxes, the upper end and the lower end of the working frame extend into the two square sliding grooves correspondingly, openings are formed in the right sides of the two assembly boxes, and sealing doors are hinged to the interiors of the two openings; the second driving assembly is installed on the rear side of the working frame and used for driving the two assembling boxes to be close to or away from each other. The two impact force detection plates are fixedly installed on the inner walls of the sides, away from each other, of the two assembly boxes correspondingly. The two opening and closing sealing mechanisms are installed in the two assembling boxes correspondingly. The device is simple in structure and reasonable in design, can detect and record the impact force generated by each electronic impact during use, and is convenient for workers to accurately judge the anti-impact performance of a product.

The application discloses a double-arm drop tester, and relates to the field of drop tests, which comprises a double-arm drop tester body, a film test table arranged at the bottom, a fixing clamp suspended on the double-arm drop tester, and an adjusting unit arranged on the fixing clamp; a spherical bearing is fixedly arranged at the end of the fixing clamp; the adjusting unit comprises a spherical seat hinged with the spherical bearing, and an annular track fixedly arranged at the bottom of the spherical seat; three clamping arms for positioning workpieces are slidingly arranged on the annular track, and are respectively a first clamping arm, a second clamping arm and a third clamping arm. The double-arm drop tester simultaneously realizes the contraction locking of the adhering suction disc and the posture locking of the spherical bearing, and has a simple structure; the protective film presents a concave structure when moving downward along with the impact table, the concave protective film can buffer and gather the scattered parts, and the problem that the parts are scattered everywhere on the existing rigid test table and are difficult to collect and analyze is solved.

The application discloses a controllable horizontal speed scaled drop test method based on a pulley balance method, and belongs to the technical field of equipment air drop and spacecraft landing. The test system of the application comprises a pulley balance mechanism, an electromagnetic releaser, a scaled model, counterweight weights and a horizontal conveying belt. The pulley balance mechanism comprises a pulley set, connecting ropes, a test suspension frame and the counterweight weights. The pulley set is fixed to the top of the test suspension frame. The connecting ropes pass through the pulley set, one end of the connecting ropes is connected with the scaled model, and the other end of the connecting ropes is connected with the counterweight weights. The electromagnetic releaser is arranged at the weight end of the pulley balance mechanism, and the horizontal conveying belt is additionally arranged at the scaled model end. Through the regulation of the speed of the horizontal conveying belt, the scaled drop test under the condition of the equivalent simulation of gravitational acceleration and the coupling of horizontal speed is realized.

The application provides an automatic reset gravity release locking mechanism for a drop test, and belongs to the technical field of airplane drop tests, and comprises a lock body main outer plate, a lock jaw, a lock tongue, an electric permanent magnet assembly, a locking block, a fixed guide rail and a main shaft pin, the top end of the lock body main outer plate is connected with a hydraulic lifting cylinder, the electric 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, the side surface of the locking block is matched with the fixed guide rail, one end of the top rod penetrates through the electric permanent magnet assembly, and the other end is provided with the lock tongue on the lower side, the lateral side surfaces of the locking block are connected with the upper end of the lock jaw through a locking connecting rod, the middle part of the lock jaw is fixed on the lock body main outer plate through the main shaft pin, and the lower end of the lock jaw clamps the lock tongue; in the locking state, the locking block is connected with the electric permanent magnet assembly under the action of magnetic force, and the connecting point position of the locking connecting rod and the locking block is lower than the connecting point position of the locking connecting rod and the lock jaw. The scheme has short unlocking response time, low maintenance cost, and improves the full-airplane repeated drop test efficiency and safety margin.

The present application relates to aerospace machinery technical field, it discloses a kind of multifunctional drop test device, it includes vertical test bench, test bench is provided with energy storage release system, drop system and load acquisition system from top to bottom;Energy storage release system is used to store potential energy for drop system and control release drop system, drop system includes separable outer frame and inner frame, landing buffer device is fixed in inner frame;Drop system is used to lock landing buffer device, and after energy storage release system releases drop system, when a certain height from ground, continue to fall by impact buffer support to prevent outer frame, complete unlocking to inner frame, inner frame and landing buffer device continue free fall, and collide with load acquisition system.Impact before the drop system of the present application and load acquisition system complete inner frame unlocking, the disturbance that landing buffer device is received when unlocking is small, and test reliability is high;It is convenient to carry out anti-inclination single leg or multi-leg drop test.