4results about How to "Reasonable choice" patented technology

This invention discloses a direct control method for torque and axial force of a linear rotary switched reluctance motor. First, the sector containing the flux linkage vector is determined through calculation. Based on the flux linkage hysteresis signal and the torque hysteresis signal, the voltage vector required for control is determined. Then, the axial force is controlled within the control range of (-15°, 15°) where the rotor position is selected. The corresponding axial force voltage vector is selected based on the axial force hysteresis signal. Finally, the operating mode of each power converter switch is determined based on the signs of all voltage vectors. This invention significantly reduces torque and axial force pulsation by directly controlling the motor's torque and axial force, resulting in a faster system response. Operating modes for the torque winding and axial force winding are established separately for torque and axial force, respectively, leading to more reasonable vector selection. Furthermore, no model calculation is performed during the control process, so the control accuracy does not depend on the analytical model, improving the system response speed and simplifying the control strategy.

This utility model relates to a test accelerator pedal locking fixture, comprising a base, a support frame, and an adjustment mechanism. The base supports the entire fixture and is placed on the driver's seat floor. One end of the support frame is fixedly welded to the base, and the other end extends freely upwards with a U-shaped groove at its top. The adjustment mechanism is located in the U-shaped groove of the support frame and includes a screw and a pair of locking nuts. The screw passes perpendicularly through the U-shaped groove to the support frame. The pair of locking nuts, with a diameter larger than the width of the U-shaped groove, are located on opposite sides of the U-shaped groove and are threadedly engaged with the screw to lock it to the support frame. This fixture has the advantages of convenient installation, high control precision, and low cost, and is suitable for laboratory and real-vehicle testing scenarios.

The invention provides a power distribution network bearing capacity evaluation method and system based on DG site selection. The method comprises the following steps: selecting typical operation scenes of a power distribution network and a DG; selecting an optimal DG access node of the power distribution network; constructing a power distribution network bearing capacity evaluation mathematical model; calculating the maximum DG capacity which can be accessed by the node according to the optimal DG access node, and planning the DG to access the system; updating a system state, bringing the determined access DGs into the power distribution network, and judging whether the total number of currently planned access DGs reaches a preset power distribution network DG access number upper limit or not; and if the upper limit of the power distribution network DG access number is not reached, reselecting a new optimal access node until the upper limit of the power distribution network DG access number is reached, and outputting a power distribution network DG maximum bearing capacity evaluation result. According to the method, the distributed new energy bearing capacity can be effectively, accurately and comprehensively evaluated.

The application discloses a method and device for browser cache data, and relates to the technical field of data processing. The method comprises the following steps: acquiring a plurality of characteristic parameter values corresponding to to-be-cached data; determining a total score value corresponding to each browser cache technology according to the plurality of characteristic parameter values corresponding to the to-be-cached data; selecting a target browser cache technology corresponding to the to-be-cached data from a plurality of browser cache technologies according to the total score value corresponding to each browser cache technology; and caching the to-be-cached data into a cache space corresponding to the target browser cache technology based on the target browser cache technology.