45results about How to "Avoid out-of-control problems" patented technology

The invention discloses a communication control method and apparatus for an unmanned aerial vehicle. The method comprises the steps of: detecting whether network parameters corresponding to a current network meet preset conditions; when the network parameters meet the preset conditions, generating a network switching request of a communication network; sending the network switching request to a control terminal; and if receiving a switching confirmation instruction returned by the control terminal in a preset time period, according to the switching confirmation instruction, switching the current network into a target network. Namely, when the unmanned aerial vehicle detects that the current network is interfered, the unmanned aerial vehicle generates the communication network switching request and fulfills the communication network switching aim by communication with the control terminal, so that the problem that the unmanned aerial vehicle is out of control due to interference to the communication network can be avoided, thereby improving control stability and safety of the unmanned aerial vehicle.

The invention provides a method for forming air gaps among copper interconnection lines. The method for forming the air gaps among the copper interconnection lines comprises the steps of providing a semiconductor device substrate; depositing a seed crystal layer which can be subjected to dry etching on the surface of the semiconductor device substrate; depositing a hard amorphous carbon mask layer on the surface of the seed crystal layer; patterning the hard amorphous carbon mask layer to enable partial seed crystal layer surface to be exposed; conducting copper electroplating on the exposed seed crystal layer surface and in the hard amorphous carbon mask layer to form the copper interconnection lines; removing the hard amorphous carbon mask layer and the seed crystal layer under a hard amorphous carbon mask layer region through dry etching; depositing a dielectric layer on the copper interconnection lines and accordingly forming the air gaps among the copper interconnection lines. By means of the method for forming the air gaps among the copper interconnection lines, the high requirements of a photo-etching and etching technologies for continuous downscaling of key dimensions can be met, the problem of over etching of the bottoms of the copper interconnection lines, caused by a wet etching process and the problem that the key dimensions cannot be controlled are solved, the controllability of the key dimensions is improved, and the yield of products is improved.

The embodiment of the invention provides a communication method and system based on a video conference. The method is applied to an articulated naturality web. An articulated naturality web server isconnected with a plurality of articulated naturality web terminals for the video conference. The plurality of articulated naturality web terminals comprise an articulated naturality web chairman terminal as a conference chairman and articulated naturality web auxiliary terminals. The articulated naturality web chairman terminal is connected with a master conference control client. The articulatednaturality web auxiliary terminals are connected with auxiliary conference control clients. The method comprises the steps that the articulated naturality web auxiliary terminals receive operation requests of the auxiliary conference control clients; the articulated naturality web auxiliary terminals, as proxies of the articulated naturality web chairman terminal, generate operation instructions according to the operation requests; and the articulated naturality web auxiliary terminals, as the proxies of the articulated naturality web chairman terminal, send the operation instructions to the articulated naturality web server for operation. In the video conference, control operation is dispersed to the articulated naturality web chairman terminal and the articulated naturality web auxiliaryterminals, operation quantity of a single control side is reduced, control operation efficiency is improved, and error probability is reduced.

The invention discloses an attitude control parameter self-adaptive adjustment method and device, electronic equipment and a storage medium. The attitude control parameter self-adaptive adjustment method comprises the steps that the engine apparent velocity increment and the flying pressure of a rocket are obtained; the control surface control efficiency of the rocket is calculated by using the engine apparent velocity increment and the flying pressure; and attitude control parameters of the rocket is calculated by using the control surface control efficiency of the rocket. By the adoption ofthe technical scheme, the attitude control parameters can be directly associated with the flight state estimated on the rocket, the matching degree of the attitude control parameters and the real flight state under different launching conditions is improved, and the problem that the rocket is out of control is avoided.

The invention discloses a preparation method of a quantum anomalous Hall effect thin-film microstructural device, which comprises the specific steps of uniformly coating electron beam glue on an Al2O3layer of a topological insulator material to serve as a protective layer; uniformly coating an ultraviolet positive photoresist on the protective layer; transferring a pattern of a mask to the ultraviolet positive photoresist by adopting a photoetching process; removing and etching the protective layer of the pattern by adopting a plasma glue removing machine; etching the Al2O3 layer and a Cr-doped (Bi, Sb)2Te3 layer on the topological insulator material by using an ion beam etching machine, and transferring the pattern of the mask to the topological insulator material; washing the remainingprotective layer and ultraviolet positive photoresist by using acetone and isopropanol, and drying to obtain the quantum anomalous Hall effect thin-film microstructural film. The preparation method avoids the corrosion for an Al2O3 thin film in a development stage of the general photoetching process, avoids a problem that the quantum anomalous Hall effect cannot be controlled due to the electron beam exposure charge accumulation, and successfully achieves the quantum anomalous Hall effect after micro-nano processing.

The invention discloses a converter control method applied to a voltage source type converter. The alternating current side of the voltage source type converter is connected with an alternating current system through a converter transformer; and closed loop current control of the converter is realized by collecting a grid-side voltage and a valve-side current. By adoption of the control method provided by the invention, the problems of grid-side sleeve CT saturation of the converter transformer and caused out of control can be avoided, without needing to add new measurement equipment, therebyachieving relatively high economic efficiency.

The invention provides a flux weakening control method of a motor, a flux weakening control device of the motor and a readable storage medium. The flux weakening control method of the motor comprisesthe steps of obtaining a direct-axis instruction voltage, a quadrature-axis instruction voltage and a bus voltage of the motor; based on the fact that the change rate of the bus voltage is larger thana first threshold value, adjusting the bus voltage, and calculating flux weakening current according to the bus voltage, the direct-axis instruction voltage and the quadrature-axis instruction voltage; and performing flux weakening control on the motor according to the flux weakening current. By means of the technical scheme, on one hand, the problem that when the bus voltage is too low, motor energy flows back to the driver, and consequently the voltage of the driver fluctuates violently and even overvoltage is out of control can be effectively solved; and on the other hand, the problem thatthe flux-weakening current is reduced due to bus voltage recoil can be avoided, the accuracy of the flux-weakening current is ensured, and the control effect on the motor is further improved.

The invention discloses a line system of a vehicle power chassis, belongs to the technical field of unmanned vehicles, and provides the following scheme. The line system of the vehicle power chassis comprises a parking control motor set, a main central domain controller and a backup central domain controller; the parking control motor set comprises a first front parking control motor, a second front parking control motor, a first rear parking control motor and a second rear parking control motor; the main central domain controller is used for controlling the first front parking control motor and the second front parking control motor in the parking control motor set of an unmanned vehicle; and the backup central domain controller is used for performing backup control on the first front parking control motor, the second front parking control motor, the first rear parking control motor and the second rear parking control motor in the parking control motor set. According to the technical scheme, the safety of the unmanned vehicle is improved.

The invention relates to a vehicle control method and device and a gearbox. The vehicle control method comprises the steps that fault information of a vehicle gear shifting electromagnetic valve is obtained; vehicle controllable gears are determined according to the fault information of the vehicle gear shifting electromagnetic valve; determining an output gear according to the vehicle controllable gear and a target gear; and according to the output gear, the vehicle controllable gear and the current vehicle driving gear, a final gear switching gear is determined. The gear of the vehicle can be in a controllable state, the gear is selected according to the actual driving condition, the gearbox can normally output power, the problem that the vehicle is out of control is avoided, and the life safety of a driver cannot be affected.

The invention discloses a fertilizer applicator capable of realizing intelligent speed regulation and discharging and an operation method thereof, and specifically relates to the field of fertilizer applicators. The fertilizer applicator comprises a fertilizer application box and a traction device, wherein the exterior of the fertilizer application box is fixedly sleeved by a stabilizing sleeve; the side surface of the stabilizing sleeve is fixedly connected with the side surface of the traction device; a discharging bin is fixedly mounted at the bottom part of the fertilizer application box;a soil turning sleeve rod is mounted on the front surface of the fertilizing box through a rotating shaft; and a hydraulic rod is fixedly mounted at the bottom part of the inner cavity of the soil turning sleeve rod. According to the invention, the distance between each magnetic ball and a discharge pipe is controlled through magnetic force formed by pressing insulating button plates at differentpositions to cooperate with electromagnet assemblies, so manual one-key control over the feeding speed and the discharging speed of a fertilizer raw material is formed; the discharging amount and whether discharging is conducted or not are more intelligent and effective; the problem that diversified environments cannot be regulated and controlled is avoided; and the practicability of the fertilizer applicator is improved.

The invention provides an energy saving method used for a cooking utensil and an energy saving system. The cooking utensil is provided with a communication module which is connected to a master control module of the cooking utensil. The communication module can be communicated with a terminal. The terminal sends a control instruction to the master control module through the communication module so as to make the cooking utensil work. A power supply terminal of the master control module and a power supply terminal of the communication module are connected to a first power supply. A power supply terminal of the communication module is connected to a second power supply. After the master control module is electrified and works, the master control module sets a level signal of an assigned interface connected to the communication module to be a first signal. The energy saving method comprises the following steps that the communication module detects whether the level signal of the assigned interface is the first signal; when the level signal of the assigned interface is detected to be the first signal, the communication module enters into a working state; and when the level signal of the assigned interface is detected to be a second signal, the communication module enters into a sleep state. In the invention, an endurance ability of a stand-by power supply in the cooking utensil can be reduced.