8results about How to "Ensure load balance" patented technology

The invention discloses an aerial recovery track design method for a cable-buoy-unmanned aerial vehicle combination, and aims to realize stable and safe recovery of an unmanned aerial vehicle. The method comprises the following steps: firstly, constructing a mooring rope-buoy-unmanned aerial vehicle combination dynamic model; then, the balance position of the assembly under different cable lengths is determined through flight simulation, and a cubic spline interpolation method is applied to obtain the whole-process expected recovery track of the cable-buoy-unmanned aerial vehicle assembly; secondly, a cable winding length instruction is designed by introducing a Sigmoid function, and continuity and smoothness of the cable winding process are ensured; then, according to the whole-process expected recovery trajectory and the cable winding length instruction, a whole-process trajectory tracking instruction in the three-axis direction of the cable-buoy-unmanned aerial vehicle combination is obtained; and finally, verifying the designed recovery instruction by adopting a backstepping control method based on an extended state observer. According to the cable-buoy-unmanned aerial vehicle combination track design method based on the Sigmoid cable winding instruction, the smoothness and continuity of the cable winding instruction and the recycling track can be guaranteed, meanwhile, impact of instantaneous loads on the cable is avoided, and therefore the stability of unmanned aerial vehicle air recycling is improved; the unmanned aerial vehicle can be safely dragged back to the cabin of the mother aircraft.

The invention discloses a movable energy storage and electric energy quality comprehensive treatment device and method, and relates to the technical field of electric power systems, the movable energy storage device comprises an energy type energy storage system and a power type energy storage system, and the movable energy storage device has bidirectional charging and discharging capability; the electric energy quality comprehensive treatment device is connected with an intelligent electric energy meter of a user and the movable energy storage device, systematic application is achieved through effective combination of the movable energy storage device and the electric energy quality comprehensive treatment device, and therefore electric energy quality in remote areas is effectively improved; according to the invention, protection of electric equipment can be facilitated, power supply pressure of lines / transformer areas can be reduced, loss of electric energy in a transmission process can be effectively reduced, load balance in three-phase lines can be ensured, utilization rate of electric power assets can be improved, energy cost can be saved, energy-saving, environment-friendly and safe development concepts can be realized, and user satisfaction can be greatly improved.

The application discloses a gateway resource scheduling method and a computer program product. The gateway resource scheduling method comprises the following steps: authenticating terminal equipment based on SIM card information, and determining the priority of each terminal equipment; in the case that a data forwarding task of different terminal equipment is received, scheduling the data forwarding task based on the priority of different terminal equipment, and obtaining a data processing queue; dividing the data processing queue into a plurality of sub-queues with a sequence based on a preset target function, wherein the preset target function is used for dividing the data processing queue into an optimal resource allocation sequence; and issuing the data forwarding task in the plurality of sub-queues with a sequence to a corresponding CPU core for execution.

The invention provides a diesel storage micro-grid frequency voltage control method and system based on a virtual synchronous generator, and relates to the technical field of diesel storage micro-grids, and the method comprises the steps: controlling the energy storage through employing a micro-grid frequency voltage control strategy under a short time scale without changing the control mode of a diesel generator when a micro-grid diesel engine is in a start-stop scene, aiming at two working conditions of diesel-storage combined power supply and energy-storage independent power supply, different frequency modulation and voltage regulation modes are adopted, and variable power frequency curve control is adopted for the virtual synchronous machine; in the starting and stopping period of a micro-grid diesel engine, pre-synchronization control is added into a virtual synchronous machine, when a pre-synchronization signal is received, the frequency difference, the voltage amplitude difference and the phase difference of an energy storage inverter and a diesel generator are dynamically compensated for corresponding control links through a PI ring, when a grid connection condition is met, a closing signal is started, and the grid connection condition is met. And entering a diesel-storage combined operation mode. According to the invention, frequency modulation and voltage regulation of the system are optimized while load balance of the micro-grid is ensured.

The utility model discloses a lighthouse hoist device, including hoist subassembly, box and support subassembly, hoist subassembly is located on the box, and the box is located on the support subassembly, hoist subassembly includes support frame, connecting frame and hoist connecting piece, and the bottom end of support frame is fixedly through the inner chamber of box, and connecting frame is fixed to the top of support frame's outer surface. Through the integration design of hoist subassembly and box, utilize the triangular support structure that L shape support frame formed with the inner wall of box, will traditional single point stress mode convert into three -dimensional face load conduction, the utility model makes the anti -overturning performance of device promotion when hoisting operation, effectively avoid the structural deformation caused by uneven force, guarantee the safety of hoisting process, the fixed mode of L shape support frame through the box and the stepped layout of connecting frame, form short path, low -loss force transmission system.

Embodiments of the present application disclose a load balancing method, device and equipment for a southbound network of a supernode system and a medium, comprising: in the southbound network of the supernode system, obtaining a symmetric network segment corresponding to each networking type; wherein each symmetric network segment contains at least one group of source leaf switches and destination leaf switches, and each group of source leaf switches and destination leaf switches is configured with multiple links; using a static routing scheme or a policy routing scheme corresponding to each symmetric network segment, the traffic in each symmetric network segment is evenly distributed to the corresponding links; wherein the static routing scheme is used to route the traffic to different southbound network out-interface groups on the destination leaf switch to different links, and the policy routing scheme is used to route the traffic from different southbound network in-interface groups on the source leaf switch to different links, avoiding data transmission disorder and ensuring the load balancing effect of the southbound network of the supernode system.

The invention provides a cargo hold stowage balancing method for a large-scale transportation and delivery unmanned aerial vehicle, which comprises the following steps: receiving a transportation and delivery task instruction, and determining the total weight of cargoes and the quantity of packaging units; the total cargo weight and the number of the packaging units are both smaller than the limit value of the cargo hold of the unmanned aerial vehicle; traversing to generate a plurality of stowage schemes conforming to the load constraint, and screening to generate a stowage scheme set for loading the gravity center envelope; based on a predetermined optimization factor, establishing an efficiency evaluation equation, and determining N groups of candidate stowage schemes from the stowage scheme set; based on a group of fixed air-drop time sequences, determining a stowage scheme which conforms to an air-drop gravity center envelope and has a minimum gravity center dynamic change range from N groups of candidate stowage schemes; and generating stowage information of each packaging unit based on the determined stowage scheme. According to the method, the cargo hold balance control operation method is greatly simplified, the operation and maintenance cost of a user is remarkably reduced, the situation that balance weights are additionally increased due to cargo unbalance loading can be avoided, and the optimal stowage balance scheme can be efficiently and reasonably output.

This invention discloses a wind tunnel testing device for repeatedly measuring the adhesion force of ice layers on an object surface. The device includes left and right support pillars and connected fixed plates, telescopic rods and their driving and fixing devices, a rotating table, a connecting plate for connecting the rotating table and an outer cylinder, a rotating outer cylinder, and micro-holes. The outer cylinder contains, from top to bottom, a sensor, a connecting rod, an inner disk, an actuator, and the bottom surface of the disk. Three inner disks are distributed from top to bottom. Each actuator is located below a corresponding inner disk, and the distance between each actuator and the inner disk is adjustable, thus ensuring multiple sequential measurements from bottom to top. The disks are semi-hollow to reduce the original load under no-load conditions. During implementation, the device of this invention, due to the small direct force-bearing area of ​​the ice layer, will not cause damage to the ice layer. Furthermore, it can be easily placed in an icing wind tunnel and can perform multiple measurements after a single icing event, thereby obtaining more realistic and accurate ice adhesion force data.