6results about How to "Reduce switching times" patented technology

This utility model discloses a machining fixture for the main boom of an aerial work platform, comprising: a machine tool worktable and an end positioning and clamping device, a rotary clamping device, and a tail-side pushing and clamping device mounted on the machine tool worktable. The end positioning and clamping device, the rotary clamping device, and the tail-side pushing and clamping device are arranged sequentially at the front, middle, and rear of the machine tool worktable, and the three can automatically and collaboratively clamp the main boom of the aerial work platform. This application achieves automatic positioning and multi-point collaborative clamping of the main boom workpiece, eliminating positioning errors caused by manual operation. The hydraulic drive system ensures synchronous operation of each clamping device, shortening the clamping preparation time. The adaptive adjustment mechanism is compatible with workpieces of different specifications, reducing the number of tooling changes. The composite clamping method disperses contact stress, preventing clamping deformation of thin-walled structural parts. The multi-directional constraint mechanism effectively suppresses machining vibration and improves the positional accuracy of hole machining.

The application discloses a distributed adaptive framing output method based on large-range remote sensing images, and relates to the technical field of remote sensing image processing. The preprocessed large-range remote sensing images are stored in a COG format, the framing size and quantity are dynamically adjusted in combination with the target area range and resolution, the tasks are distributed by a data locality perception scheduler after Z-order curve sorting, the computing nodes load the framing data with a buffer area, the framing data is interpreted by a random forest, and the buffer area is cropped, finally, the virtual data set is aggregated, efficient distributed parallel processing of the large-range images is realized, the I / O bottleneck and the computing resource limitation are effectively relieved, the context missing problem on the framing boundary is solved, the intelligent interpretation efficiency and precision are improved, and the multi-resolution on-demand rendering and elastic expansion are supported to adapt to the data scale growth.

The application relates to the technical field of patrol path optimization, and discloses an intelligent recommendation system for an external stand pipe inspection path, which comprises the following: an inspection unit records facade positions, center heights and inspection operation modes; an evaluation unit performs risk assessment on each inspection unit according to historical defect information, stand pipe types and environmental exposure conditions, obtains an inspection unit risk level, and forms an inspection unit time window constraint; a processing unit constructs an inspection service graph; a recommendation unit determines a to-be-inspected unit, generates a candidate inspection path on the inspection service graph, combines the candidate inspection paths into multiple inspection task packages, performs resource scheduling in combination with skill information and available time information of an inspection team, and obtains an inspection path recommendation result corresponding to each inspection team. The application reduces the overall inspection time and the number of high-cost inspection operation mode switching times, and improves the external stand pipe inspection safety and operation and maintenance management efficiency.

This application provides a routing switching method, apparatus, computing device, and computer storage medium. The routing switching method includes: determining routing configuration information; determining at least two routes for a destination network address from a target routing table according to the routing configuration information, wherein the at least two routes include a primary route and at least one backup route; and sending the at least two routes corresponding to the destination network address to a forwarding end, wherein the forwarding end is used to enable at least one backup route to perform data forwarding operations in the event of a failure of the primary route among the at least two routes. The technical solution provided by this application reduces the interruption time of data forwarding tasks.

A DC / AC conversion device and a power supply system. The DC / AC conversion device comprises a transformer, a DC / AC conversion circuit located at the primary side of the transformer, a rectification circuit and a phase switching circuit located at the secondary side of the transformer, and a controller; wherein: the transformer is coupled with the DC / AC conversion circuit, and is adapted to step up a first alternating current signal output by the DC / AC conversion circuit to obtain a second alternating current signal; the rectification circuit is coupled with the transformer, and is adapted to rectify the second alternating current signal to obtain a second direct current signal; the phase switching circuit is coupled with the rectification circuit, and is composed of a plurality of switching tubes, and is adapted to phase switch the second direct current signal to obtain a third alternating current signal, the third alternating current signal being adapted to be input to an alternating current grid; and the controller. By using the above scheme, the loss of the switching tube in the DC / AC conversion device can be reduced.

This invention discloses a method, apparatus, and system for voltage modulation of a switched reluctance motor based on effective vectors, belonging to the field of motor drive control, including: obtaining the rotating voltage component u of the switched reluctance motor corresponding to a voltage reference value during the current switching cycle. αβ and zero-sequence voltage component u z ; for u αβ By decomposition, the rotating voltage components U of the two converters in the open-winding motor driver are obtained. αβ1 and U αβ2 And calculate the action time T' of the first effective vector and the second effective vector of the two converters respectively. x1 T' y1 T' x2 and T' y2 This enables the two converters to achieve u z The modulation, and the rotating voltage components are U αβ1 and U αβ2 According to T' x1 T' y1 T' x2 and T' y2 The duty cycle of each bridge arm in each converter is calculated, and the remaining time is filled using a single zero vector; the switching signal of each bridge arm in both converters is determined based on the duty cycle. This invention achieves modulation of both rotating voltage components and zero-sequence voltage components simultaneously through effective vector allocation, thereby reducing the number of switching operations within each switching cycle.