7results about How to "Guaranteed dynamic stability" patented technology

The invention relates to the technical field of universal testing machines, in particular to a clamping device for a universal testing machine. Comprising a machine body with an upper cross beam and a lower cross beam, clamps are arranged on the upper cross beam and the lower cross beam respectively, at least one clamp comprises a shell with an opening in the upper end, a transmission block driven by a lifting mechanism is installed in the shell and provided with a wedge-shaped groove with an opening in the upper end, and a left clamping block and a right clamping block are installed in the wedge-shaped groove. The left side surface of the left clamping block and the right side surface of the right clamping block are consistent with the left surface and the right surface of the wedge-shaped groove in inclination angle, and the width of the lower bottom of each clamping block is smaller than 1 / 2 of the width of the lower bottom of the wedge-shaped groove and larger than 1 / 2 of the width of an upper end opening of the wedge-shaped groove. Transverse connecting structures are arranged on the two sides of the upper portions of the two clamping blocks, transverse guide grooves are formed in the upper end of the shell, and the outer ends of the transverse connecting structures are located in the transverse guide grooves and matched with springs in the transverse guide grooves. According to the invention, universal, efficient and reliable clamping of various samples is realized, and the accuracy and repeatability of testing are improved.

This invention relates to the field of defect identification technology, and more particularly to an image positioning and recognition system based on UAV inspection of wind turbine blades. The system includes an image positioning and recognition center, a data acquisition module, a detection preparation module, a flight control module, an attitude dynamic management module, a detection data module, a defect type identification module, a positioning visualization module, and an operation display module. This invention uses image recognition and blade sway amplitude for dual verification, initiating detection only when there is no impact or only a slight impact and the sway amplitude meets the standard, ensuring the rationality of the detection initiation conditions. During detection, analysis is performed from two dimensions: hovering position and hovering attitude, avoiding abnormal detection data caused by UAV position deviation or attitude anomalies. After screening out effective defect areas, accurate defect type identification is achieved. Furthermore, through coordinate transformation, an intuitive 3D model of the defective blade is generated, providing precise guidance for maintenance work and significantly reducing maintenance troubleshooting costs.

The application discloses a lens coupling device driven by a synchronous belt and a coaxial spherical parallel mechanism, and relates to the technical field of lens coupling, which comprises a three-axis moving device, a base, a movable platform, three branch chain assemblies, three groups of synchronous belt driving assemblies and a clamping device, the base is in transmission connection with the three-axis moving device; each branch chain assembly comprises a first transmission member and a second transmission member, the first transmission member is in rotational connection with the second transmission member and forms a rotation axis A, the first transmission member is in rotational connection with the movable platform and forms a rotation axis B, and the second transmission member is in rotational connection with the base and forms a rotation axis C; the rotation axis A, the rotation axis B and the rotation axis C can be prolonged to intersect at a point in space, and the point is defined as a motion center point, and the motion center points in the three branch chain assemblies are coincident. The lens coupling device driven by the synchronous belt and the coaxial spherical parallel mechanism can improve the efficiency of adjusting the lens coupling position, and can also improve the lens coupling precision.

The application discloses a high-temperature environment wind power torsion-resistant flexible cable and belongs to the technical field of cables.The high-temperature environment wind power torsion-resistant flexible cable comprises an outer sheath, a protection mechanism arranged in the outer sheath, and a buffer mechanism arranged in the protection mechanism.The buffer mechanism comprises a mounting component, buffer elastic blocks and a buffer filling material.The mounting component is arranged in the outer sheath, the buffer elastic blocks are arranged in multiple numbers, the multiple buffer elastic blocks are arranged in the mounting component, the multiple buffer elastic blocks are uniformly distributed, and the buffer filling material is arranged in the mounting component.The high-temperature environment wind power torsion-resistant flexible cable significantly improves the torsion fatigue life, avoids stress concentration, and converts the concentrated torsion force applied from the outside into uniform and orderly deformation and energy dissipation of internal components through the synergistic effect of the buffer elastic blocks and the filling material, thereby avoiding local overload, enabling the cable to withstand long-term alternating torsion cycles that are much higher than those of a conventional structure, and greatly prolonging the service life.

The utility model relates to the technical field of oil pumping units, in particular to an oil pumping unit sling torsion releasing device. Comprising a beam hanger body, long grooves are formed in the two ends of the beam hanger body, stepped grooves are formed in the upper groove walls and the lower groove walls of the long grooves, large-diameter grooves of the stepped grooves are close to the centers of the long grooves, bearings are installed in the large-diameter grooves of the stepped grooves, inner taper sleeves are installed in inner rings of the bearings, the inner edges of the inner taper sleeves are inner conical surfaces, and rotating pieces are inserted into the inner taper sleeves; the steel wire rope penetrates through the stepped groove and is fixedly connected with the rotating piece. According to the utility model, through integration of the stepped groove and the bearing, steel wire ropes of various specifications are compatible, and the problem of adaptability caused by a complex structure in a traditional scheme is avoided. Detail design such as anti-skid lines and convex edge limiting further reduces the risk that the steel wire rope is disengaged from the groove and slips, the operation safety of equipment is improved, and the steel wire rope is particularly suitable for high-load and high-frequency vibration oil field operation environments.

This invention provides a method and system for random-delay UAV formation control based on an event-triggered mechanism, belonging to the field of UAV formation control technology. The invention establishes a global inertial coordinate system and normalizes the original motion state to a standard motion state; it defines the true value of lumped disturbance using heterogeneous dynamic constraint equations; it designs a nonlinear disturbance observer with auxiliary variables to calculate the estimated value of lumped disturbance approximating the true value; it constructs a full-state coupled dynamic event-triggered mechanism to calculate a dynamic triggering threshold that includes a minimum interval protection term and is negatively correlated with the disturbance magnitude; it corrects neighbor nodes with random communication delays based on the estimated value of lumped disturbance to obtain the predicted neighbor motion state; it uses a stable manifold neural network to infer the optimal costate vector and combines it with disturbance feedforward compensation to generate physical control commands. This invention improves the formation's anti-interference capability while reducing communication load.

This invention discloses an energy-saving motor based on an intelligent ventilation system, comprising a motor body, a fan shroud on the rear end cover of the motor body, and n ventilation holes (n>1) evenly distributed circumferentially on the rear end cover; each ventilation hole is provided with a ventilation component; each ventilation component includes a fixed frame, a sliding frame, and a wind-blocking block; the fixed frame covers the ventilation hole, the sliding frame is slidably connected to the fixed frame, and a ventilation opening is opened on the sliding frame, with an adjustment component provided on each ventilation opening; a wind-blocking block is connected to the inner side of the sliding frame and is located in the corresponding ventilation hole; a mounting ring is provided on the inner side of the motor body, and the rotating shaft passes through the center of the mounting ring; each sliding frame is connected to the mounting ring on the outer side via a telescopic rod. This invention ensures the stability of the rotor rotation while maintaining airflow cooling effect during high-intensity operation of the motor body.