9results about How to "Avoid roughness" patented technology

The application belongs to the technical field of teaching practical training scene simulation control, and specifically discloses a teaching practical training scene simulation control method based on PLC technology, which comprises the following steps: constructing a fault mode library containing low, medium and high levels, randomly distributing faults from the low fault level, loading a simulation scene, collecting fault identification response time and adjustment operation sequence, verifying diagnosis accuracy and evaluating fault recovery degree after executing the sequence, generating a practical operation qualification degree according to different conditions, then judging promotion and dynamically adjusting the fault level according to the qualification degree, and generating a student comprehensive ability evaluation report based on the qualification degrees in the previous iterations; the application constructs a fault mode library containing low, medium and high fault levels based on historical power operation data, and dynamically adjusts the fault level to be distributed subsequently according to the practical operation qualification degree, thereby overcoming the defects of static preset fault situations, and realizing a personalized and gradual skill upgrading path.

The present application relates to the technical field of motion data recovery, and provides a human motion data recovery method and device based on tensor representation, which can better maintain the spatial structure and time structure of the human motion data to be recovered by determining the third-order tensor of the human motion data to be recovered. Considering the time sequence of the human motion data to be recovered, a frame difference regularization term is introduced into the objective function, so that the non-smoothness in the recovery process of the human motion data to be recovered can be avoided. The objective function combines the tensor core norm term of the recovery variable and the frame difference regularization term of the recovery variable, simultaneously considers tensor tube rank minimization and frame difference smoothing, can significantly reduce the recovery error, and obtain a more superior recovery result.

The utility model discloses a kind of waterproof inner box of safe deposit box, the waterproof inner box of this safe deposit box includes: box, lid and waterproof structure, lid and box top open mouth corresponding cooperation;Waterproof structure is set in the top wall inner surface of lid corresponding to the end face of box top open mouth;Box is provided with abutment structure, abutment structure is set in the open edge of box top, and the top side surface of waterproof structure and abutment structure is in contact;Waterproof structure is set as square sealing rubber strip of closed ring connection corresponding to abutment structure;When lid is buckled to box, the bottom side surface of sealing rubber strip and the top side surface of abutment structure are in contact fully;The cross-sectional width of sealing rubber strip is greater than the cross-sectional width of abutment structure.Safe deposit box waterproof inner box is mechanically buckled by lid and box, forms initial closed space, prevent external water vapor or liquid directly intruding, and direct contact of waterproof structure and open end face, create first sealing layer, and water penetration is blocked using physical contact.

The utility model discloses a kind of knife dies for eliminating filmless paper die cutting scrap edge, comprising: die holder, the die holder is opened with multiple forming areas, the forming area is provided with ring cutter, the inside of the ring cutter is provided with and the first elastic member matched with ring knife cutting shape, outside is provided with second elastic member, the first elastic member and second elastic member are used to pop out blanking after ring cutter cutting. By dividing the blade angle into two sections, the knife die life is ensured, and the blade position is avoided to squeeze the material, the edge of the part is improved, the die cutting knife edge is not uneven, the sufficient blade height ensures the vertical pressure during cutting, and sufficient buffer is provided for the paper to avoid wrinkles.

The present application relates to the technical field of ultra-precision machining control, and particularly relates to a modal controller generation method for a nano-positioning platform, a medium and equipment. The present application performs zero-pole decomposition on a transfer function of a controlled object, separates stable zero points, unstable zero points, non-resonant poles and resonant poles, constructs a desired inner loop closed-loop transfer function, retains the stable zero points, the unstable zero points and the non-resonant poles, and replaces the resonant poles as a whole with high-damping desired poles, inversely solves to obtain a modal controller structure, introduces zero-pole cancellation constraints to eliminate controller instability caused by unstable zero points, introduces order constraints to ensure causal realizability, applies constraints with a damping ratio greater than 0.1 to the desired poles and the introduced new zero points respectively, and outputs an inner loop modal controller. The present application realizes simultaneous suppression of multiple resonant peaks, gets rid of dependence on a low-order model, ensures stability, realizability and smoothness of a control signal of the controller, and significantly improves control bandwidth and dynamic performance.

The utility model discloses a 3D printing spray head with self -cleaning anti -blocking structure belongs to 3D printing equipment component technical field, in view of the low durability of existing 3D printing spray head nozzle, easy to block, influence printing efficiency and quality's problem. It includes 3D printing spray head body, and 3D printing spray head body bottom is equipped with mounting seat, and the outer thread of mounting seat bottom is detachably connected through the inner thread with the nozzle, and the nozzle is made of the high temperature resistance base body of ceramic base composite material and the pure diamond film anti -sticking coating that evenly covers its inner wall constitutes, and 3D printing spray head body lateral wall is equipped with the radiating fin board through bolt, and the other side of radiating fin board is equipped with the radiating fan, and 3D printing spray head body integrates intelligent sensing module, and triggers the self -cleaning program when monitoring the parameter exception in nozzle, and after heating softening residual, uses high -pressure airflow to blow out. The spray head is applicable to 3D printing operation, can promote nozzle durability and anti -blocking capacity, adapts high temperature, viscosity and high filling material.

The utility model provides automatic metal smelting, calendering and conveying equipment, belongs to the technical field of metal smelting, and aims to solve the problem that scratches are easily formed on the surface of a roller due to the fact that the edge of a calendered plate is sharp. Comprising a conveyor supporting frame, a limiting mounting plate, a position adjusting lead screw, a guide connecting plate, a sliding limiting plate, a guide connecting rod and a plate bearing piece. The limiting mounting plates are connected to the front side and the rear side of the conveyor supporting frame through bolts. The position adjusting screw rod is rotationally connected to the upper part of the limiting mounting plate; the guide connecting plate is in threaded connection with the outer side of the position adjusting screw rod; the sliding limiting plate is connected to the lower part of the guide connecting plate in a sliding manner; the guide connecting rod is connected to the lower part of the sliding limiting plate in a sliding manner; the plate bearing piece is fixedly connected to the lower portion of the guide connecting rod. According to the utility model, collision between a plate and the roller is avoided, and scratches on the surface of the roller are avoided.

This invention discloses a casting defect detection method based on dual-channel collaborative diagnosis and root cause analysis, belonging to the field of investment casting quality inspection technology. The method includes: acquiring investment casting process parameters and screening quantifiable physical parameters strongly correlated with defects; constructing a Bayesian network causal relationship graph based on a directed acyclic graph; converting time-series data into statistical features and concatenating them with static parameters to form a structured feature matrix; processing the feature matrix using a TabNet model to complete the first defect diagnosis; capturing images of the casting appearance and performing multi-angle photometric stereo fusion processing using an EfficientNet-B4 model to complete the second defect diagnosis; calculating the consistency score of the two diagnoses using Dempster-Shafer evidence theory to complete dual-channel decision fusion; performing SHAP-based post-causation on the TabNet model output and combining it with Bayesian network backward probability inference to complete root cause localization. This invention, through the dual-channel collaboration of process parameter diagnosis and visual appearance diagnosis, achieves comprehensive detection and process root cause localization of typical investment casting defects such as shrinkage porosity, gas porosity, cracks, sand inclusions, and cold shuts, significantly improving the accuracy and interpretability of defect detection.

The application discloses a rotary well cellar multi-station zero-speed vertical cellar digging mechanism, equipment and method, solves the problem that the existing cellar digging mechanism is easy to scratch the well cellar wall and has a complex structure, has the beneficial effects of simple and reasonable structure and high cellar digging quality, and specifically has the following scheme: a rotary well cellar multi-station zero-speed vertical cellar digging mechanism, which comprises at least three groups of transmission assemblies, one end of each transmission assembly is fixed to a center shaft, one end of a connecting piece is rotatably connected to the other end of the transmission assembly, a duckbill planting mechanism is used for accommodating tobacco seedlings, the other end of the connecting piece is connected to the duckbill planting mechanism, the duckbill planting mechanism comprises two half duckbill components, one of the half duckbill components can swing, the position of the duckbill planting mechanism is perpendicular to the ground surface when the duckbill planting mechanism is working, one end of a pull rod is movably connected to the side wall of the transmission assembly, and the other end of the pull rod is movably connected to the swingable duckbill component of the duckbill planting mechanism.