17 results about "Static performance" patented technology

Provided are an intelligent design method and device for a thick-plate joint of longitudinal and cross members of an aluminum alloy vehicle frame. The intelligent design method includes: establishing a finite element model of a vehicle frame, analyzing static performance and fatigue performance of the vehicle frame under bending and torsion conditions, and selecting a connection joint of longitudinal and cross members with weak static performance and fatigue performance on the vehicle frame as a submodel; with connection parameters of the submodel as design variables, obtaining, by simulation, sets of training samples and a corresponding target response data set; establishing forward and inverse mapping relationships between design variables of a connection joint of longitudinal and cross members and target responses; and then on the basis of fully training the neural network model, obtaining an optimal layout scheme of connection joint fasteners of longitudinal and cross members by prediction and optimization.

The invention provides a device and a method for testing the shearing and compression performance of a helicopter engine damping part. The shearing performance testing device comprises a base (1), a fixed support (3), a stress application lead screw (4), a tension sensor (5), a dynamometer (6), a double-fork (7), an arc-shaped pulling plate (8), a mounting support (10), a dial indicator (11) and a magnetic base (12). The compression performance testing device comprises a base (1), a fixed support (3), a stress application lead screw (4), a tension sensor (5), a dynamometer (6), a mounting support (10), a dial indicator (11), a magnetic base (12), a single lug (13) and a square loading frame (14). Measurement of shear and compression deformation displacement of the engine damping member is realized, shear and compression performance of the engine damping member is verified, and the installed damping member is ensured to effectively prevent transmission of vibration waves and weaken harm of inertial impact to an engine. And the situation that the installation of the damping piece with substandard static performance affects the flight safety is avoided. The test cost is low, the operation is simple, the test efficiency is high, and the deformation displacement of the damping member can be visually reflected.

The invention discloses a dynamic evaluation and intelligent compensation system and method for contact rigidity of a machine tool joint part. The system comprises a digital twin and multi-source data interface module, a contact interface multi-scale morphology acquisition and characterization module, a joint part contact mechanical state online simulation module, a contact rigidity dynamic calculation model library, a performance evaluation and intelligent compensation decision-making unit and a compensation strategy execution and feedback module. According to the method, dynamic and high-precision contact stiffness analysis is achieved, the problem that a traditional static model is insufficient in precision is solved by deeply fusing microstructure measured data, a macrostructure model and a dynamic working condition load, and the time-varying characteristic of the joint part under the complex working condition can be reflected more truly. A perception-evaluation-compensation active control closed loop is constructed, and the digitization level of machine tool design and operation is improved. According to the method, the contact state of the joint part is actively optimized, so that the dynamic and static performance and machining quality of the machine tool are improved.

The embodiment of the invention discloses a specified time anti-interference motor control system and method, and the method comprises the steps: building a mathematical model of a permanent magnet synchronous motor through motor mechanism analysis and parameter measurement setting, designing a practical specified time disturbance observer, and estimating the lumped interference of a system in real time; and a specified time self-adaptive anti-interference composite controller is constructed based on a backstepping method and a dynamic inverse method, so that accurate control of the rotating speed of the motor is realized. According to the system, virtual control quantity is designed through a backstepping method, and a controller adopts an instruction filter and an interference adaptive compensation mechanism to realize effective compensation of system uncertainty, modeling errors and external disturbance. The method can effectively cope with uncertainty caused by system parameter perturbation, unmodeled dynamics and external load dramatic change, gives consideration to dynamic and static performance, has the advantages of closed-loop bounded stability, adaptive disturbance compensation and strong interference resistance, and is suitable for rotating speed control of a motor system under complex working conditions.

The invention relates to the technical field of cloud platforms, in particular to a data center operation monitoring system and method based on a cloud platform, which get rid of the limitation that only static performance indexes of equipment are considered traditionally, fully consider the adaptation degree of tasks and the equipment, flexibly distribute computing power according to actual conditions, and improve the operation efficiency. The situation that the performance of equipment is reduced due to power fluctuation, and task execution is influenced is avoided, so that efficient task allocation is achieved, unnecessary resource waste is reduced, the overall operation efficiency of the system is remarkably improved, and the operation state of the equipment can be evaluated and adjusted in time by considering the dynamic influence of task proceeding and power operation on the equipment; the method effectively deals with equipment operation abnormity caused by power fluctuation, reduces the risk of task execution failure, guarantees stable operation of the system, comprehensively evaluates the matching degree of the equipment and the task, compensates and corrects the equipment operation abnormity, enables the task to be efficiently executed on more suitable equipment, and greatly improves the success rate of task execution.

The application provides a kind of permanent magnet synchronous motor deadbeat prediction control method based on super-spiral sliding mode extended observer, which first designs a sliding mode observer based on super-spiral theory to estimate unknown disturbances such as parameter perturbation, then designs an extended state observer to estimate disturbances twice, and compensates the estimated values of the two disturbances to the predicted current and output voltage, respectively, to achieve high-precision and robust current control and improve the dynamic and static performance of the control system. Compared with traditional deadbeat prediction control, the application has the advantages of high robustness, low parameter sensitivity, good dynamic performance and no static error.

The invention relates to a rotor system integrated topological optimization design method considering dynamic performance, and belongs to the technical field of high-performance calculation science, and the method comprises the following steps: taking statics and rotor dynamics as constraint conditions for a rotor two-dimensional structure, carrying out two-dimensional topological optimization design, and obtaining a new rotor two-dimensional structure; and on the basis of the new two-dimensional structure of the rotor, three-dimensional topological optimization design is carried out on the sector model of the rotor by taking the rotation period structure frequency and the statics property as constraint conditions, and a new three-dimensional configuration is obtained. According to the method, on the basis of traditional topological optimization which only considers the static performance, the constraint on the dynamic performance is increased, the dynamic performance requirement needed by the rotor system can be met while the maximum rigidity design is completed, the design period can be effectively shortened, and the design efficiency can be effectively improved.

The invention relates to the technical field of vehicle collision testing, in particular to an MPDB aluminum honeycomb performance verification method and system. The method comprises the following steps: sequentially carrying out a quasi-static compression test, a dynamic test and a real vehicle test on the honeycomb aluminum; the real vehicle test comprises a target vehicle-bullet vehicle collision test and a test vehicle-trolley collision test; in the quasi-static compression test, comparing the rigidity curve of the aluminum honeycomb with a first set channel, and verifying the static performance of the aluminum honeycomb; in the dynamic test, the honeycomb aluminum is impacted, the rigidity curve of the honeycomb aluminum is compared with a second set channel, and the deformation degree of the honeycomb aluminum is checked, so that the dynamic performance of the honeycomb aluminum is verified; and performing comparative analysis on data acquired in the target vehicle-bullet vehicle collision test and data acquired in the test vehicle-trolley collision test. According to the invention, accurate, comprehensive and systematic verification of the performance of the honeycomb aluminum is realized.

The application relates to a high-speed oil-gas lubricated hydrodynamic step thrust bearing static performance design method, which comprises the following steps: establishing an oil-gas mixture viscosity and density expression; based on the oil-gas mixture viscosity and density expression, establishing a step thrust bearing Reynolds equation and an energy equation in a polar coordinate; solving the Reynolds equation and the energy equation to calculate the static performance of the thrust bearing; carrying out static performance parameter calculation of the oil-gas lubricated hydrodynamic thrust bearing under different oil-gas mixture gas contents and working rotating speeds to obtain the influence law of oil-gas lubrication on the static performance of the thrust bearing; and taking the friction torque, the bearing capacity and the temperature rise of the hydrodynamic thrust bearing as design targets, determining the structure parameters of the bearing through sensitivity analysis of the structure parameters on the static performance. The high-speed oil-gas lubricated hydrodynamic step thrust bearing static performance design method can greatly improve the static design precision of the bearing and shorten the design cycle.

The invention discloses automobile tie rod ball static performance test equipment, belongs to the technical field of automobile part tests, and solves the problems that in an automobile tie rod ball static performance test, the initial swing torque of a batch of products is qualified, the starting torque is attenuated to be unqualified after 24-hour load standing retest, the torque is increased after the same sample is continuously rotated and tested, and the test efficiency is low. And the judgment is invalid due to unstable data. Comprising a servo motor, a driving chuck which is in transmission connection with a driving path of the servo motor, a plurality of groups of rotating seats which can move along the length direction of a rotor shaft of the servo motor, and a driven chuck which is coaxial with the rotor shaft of the servo motor and is rotationally connected with the rotating seats. According to the invention, reliable online quality determination is realized through temperature control and voltage stabilization of the self-adaptive power thermal management module, self-calibration and error elimination of the main control module, regeneration of a composite signal excitation ball head, synchronous acquisition of multi-mode signals, multi-feature fusion determination of a state after analysis and feature extraction, and distinguishing of ball bowl creep deformation and lubricating grease thixotropy.

The application relates to the technical field of vehicle collision test, in particular to an MPDB honeycomb aluminum performance verification method and system. The method comprises sequentially performing a quasi-static compression test, a dynamic test and a real vehicle test on the honeycomb aluminum; the real vehicle test comprises a target vehicle-bullet vehicle collision test and a test vehicle-trolley collision test; in the quasi-static compression test, the rigidity curve of the honeycomb aluminum is compared with a first set channel, and the static performance of the honeycomb aluminum is verified; in the dynamic test, the honeycomb aluminum is impacted, the rigidity curve of the honeycomb aluminum is compared with a second set channel, and the deformation degree of the honeycomb aluminum is checked, so as to verify the dynamic performance of the honeycomb aluminum; the data collected in the target vehicle-bullet vehicle collision test is compared and analyzed with the data collected in the test vehicle-trolley collision test. The application realizes accurate, comprehensive and systematic verification of the performance of the honeycomb aluminum.

The invention discloses a numerical control machine tool motorized spindle performance evaluation analysis method based on deep learning, and belongs to the technical field of new generation information technology and high-end manufacturing equipment.The numerical control machine tool motorized spindle performance evaluation analysis method comprises the steps that the high-rotating-speed working characteristic of a motorized spindle is considered, and meanwhile a lightweight static model simplification rule is provided to carry out a finite element simulation analysis process; rigidity numerical value fitting calculation fused with a deep learning network is correspondingly carried out, an orthogonal constraint model oriented to motorized spindle dynamic performance analysis is further constructed on the basis of a static model, and motorized spindle modal frequency under a multi-order vibration mode is obtained through extended modal analysis under free grid division; key static performance indexes and dynamic performance indexes of the motorized spindle are accurately analyzed, and quantitative support is provided for follow-up rough machining capacity analysis and working precision improvement of a numerical control machine tool.

This invention discloses a locally porous helical groove gas thrust bearing and its static performance design method. The bearing includes a thrust disc, a thrust pad, a locally porous throttling device, helical grooves, a sleeve, and an end cap. The thrust pad or thrust disc is machined with pump-in helical grooves. The locally porous throttling device is made of porous material and is positioned in the groove area, platform area, or dam area of ​​the thrust pad, uniformly distributed circumferentially. The method includes: considering the inertial force of fluid flow inside the porous material, establishing a static model of the locally porous helical groove gas thrust bearing, dividing the flow field mesh, and proposing a numerical calculation method; static performance analysis of the locally porous helical groove gas thrust bearing; and static performance design of the locally porous helical groove gas thrust bearing to obtain the design variables corresponding to the maximum load capacity and static stiffness. This invention can increase the load capacity and static stiffness of the bearing at high speeds, eliminate frictional wear during start-up and shutdown, and improve the accuracy of the bearing's static performance design.

The application discloses a superimposed adjustable differential pressure reducing valve, aiming at solving the problems of the existing fixed differential pressure reducing valve, such as non-adjustable pressure difference, poor dynamic and static performance matching, and limited application scenarios. The reducing valve comprises a valve body, a pressure stabilizing and adjusting assembly arranged in the valve body, a sliding valve spool, a throttling assembly, a pressure compensation spring and a shuttle valve assembly; the pressure stabilizing and adjusting assembly adjusts the pre-tightening force of the pressure compensation spring through a pressure stabilizing valve spool in threaded cooperation with a sliding valve sleeve, realizes continuous adjustment of the pressure difference, and locks the position after adjustment through a locking nut; the throttling hole of the throttling assembly and the damping hole of the shuttle valve feedback loop are both matched through simulation optimization, and the shuttle valve assembly is compatible with bidirectional load port pressure feedback and external pressure regulating port control pressure input. The application realizes a pressure difference adjustment range of 0.5-1.5 MPa, and the maximum flow rate reaches 61.74 L / min, while high-precision fixed-difference control and high operation stability are taken into account, and the application can be widely applied to hydraulic control systems in the fields of aerospace, automobiles, engineering machinery and the like.

The invention provides an axle gear lightweight design method and equipment based on dynamic response and topological optimization, belongs to the technical field of axle gear design, and aims to establish an axle system-level dynamic model through MASTA, evaluate the system dynamic performance based on the established axle model, and ensure that the system has good NVH (Noise Vibration and Harshness) performance. And if the dynamic performance does not reach the standard, taking the dynamic meshing flexibility of the meshing pair as a target function, taking a gear lightweight design index into consideration, carrying out topological optimization on a gear spoke, and calculating the optimized gear statics and system dynamics response. And determining a final gear spoke structure. On the basis of system dynamic response, an optimization model about meshing flexibility is constructed, volume mass reduction serves as an optimization target, gear lightweight design is achieved in combination with mature finite element software and MASTA, and system NVH performance optimization is achieved while good static performance of the gear is guaranteed.

The utility model belongs to the technical field of anti-static workbenches, and particularly relates to an anti-static debugging workbench which comprises a workbench body. A mounting groove is formed in the top of the workbench main body; an anti-static base plate is connected into the mounting groove in a sliding manner; a first sliding groove is formed in one side of the outer portion of the workbench body. A spring is fixedly connected into the first sliding groove. When the anti-static base plate is used for a long time, the anti-static performance of the anti-static base plate is gradually weakened, the conductivity of the anti-static base plate is reduced, and static electricity possibly occurs to cause damage to materials, so that the anti-static base plate is regularly replaced by disassembling the anti-static base plate in the mounting groove; and the situation that the material is damaged due to performance reduction caused by long-term use of the anti-static base plate is greatly reduced.

The present application relates to the technical field of cloud platform, especially to a data center operation monitoring system and method based on a cloud platform, which breaks away from the limitation of traditional static performance indicators of equipment, fully considers the adaptation degree of tasks and equipment, flexibly allocates computing power according to actual conditions, avoids the influence of task execution caused by the performance decline of equipment due to power fluctuation, thereby realizing efficient task allocation, reducing unnecessary resource waste, significantly improving the overall operation efficiency of the system, through considering the dynamic influence of task performance and power operation on equipment, the running state of the equipment can be evaluated and adjusted in time, effectively dealing with the abnormal operation of the equipment caused by power fluctuation, reducing the risk of task execution failure, protecting the stable operation of the system, comprehensively evaluating the matching degree of equipment and tasks, simultaneously compensating and correcting the abnormal operation of the equipment, so that the tasks can be efficiently executed on more suitable equipment, greatly improving the success rate of task execution.