47results about How to "Perfect control strategy" patented technology

The invention relates to an automobile headlamp automatic control system based on machine vision. The automobile headlamp automatic control system is characterized in by comprising a camera arranged at the inner side of a windscreen in the front of an automobile, wherein the camera is connected with a DSP (Digital Signal Processor) control system arranged on a central control panel of the automobile through a data line, an output end of the DSP control system is connected with a triode, the triode is connected with a control end of a relay, another control end of the relay is connected to a power supply of the automobile, and contacts of the relay are connected in a headlamp control circuit of the automobile in series; the camera collects the information of road lamps at the two sides of a road and the lamp information of automobiles in an opposite direction in real time and sends collected color images to the DSP control system, the DSP control system analyzes and processes pixels in the road lamp zone and the automobile lamp zone and sends control commands to the triode according to processed results, and the triode controls the relay to pull in and disconnected so as to control the automobile to be switched between a high beam lamp and a dipped headlamp. The system can be broadly used for the switch control of the headlamp of the automobile running at night.

The invention discloses an electronic parking breaking system. The controlling method comprises the following steps that an EPB switch of the system outputs a parking controlling signal to an electronic parking controlling module, the electronic parking controlling module outputs a driving signal to an electronic parking actuator, the electronic parking controlling module is connected with a whole vehicle CAN network framework through a CAN bus serial port, an intelligent interconnection controlling module in the whole vehicle CAN network framework is in communication with a screen, the screen sends the parking controlling signal to the electronic parking controlling module, the electronic parking controlling module sends a parking state signal to the screen, and the screen displays the parking state signal. The electronic parking breaking system is a parking system of combing intelligent interconnection with an electronic parking breaking system, a reasonable and complete control strategy at present is contained, operation of a driver is conducted more conveniently, and vehicle control experience is improved.

The invention discloses a method for controlling a permanent-magnet synchronous motor in a full-speed range without position sensors in a surface-mounted mode. The method includes firstly, injecting pulsating high-frequency voltage signals into an axis of a two-phase rotation estimation coordinate system, scanning the permanent-magnet synchronous motor within a 360-degree electric injection angle range and recognizing the initial position of the permanent-magnet synchronous motor according to high-frequency feedback currents of the axis; secondly, tracking the position of the permanent-magnet synchronous motor in real time according to the high-frequency feedback currents of the axis; thirdly, controlling the permanent-magnet synchronous motor in a medium and high-speed range and a low-speed range without the position sensors by a pulsating high-frequency injection process and a sliding-mode observer process and selecting control processes according to an instruction speed and an actual speed so as to control the permanent-magnet synchronous motor in the full-speed range without the position sensors. The method has the advantages that the two control processes supplement each other, so that the control performance can be improved to a certain extent as compared with the control performance when each control process is used individually, the dependence of the sliding-mode observer process on parameters of the motor is cast off, the influence of the high-frequency injection process on a sliding-mode observer and original control for the permanent-magnet synchronous motor is eliminated, and a perfect strategy for controlling the permanent-magnet synchronous motor in the full-speed range without the position sensors in the surface-mounted mode is provided.

The invention discloses a fan adjustment and control testing method for optimizing power consumption. When a server system is subjected to system pressure testing in the working environment, the system temperature and the system power consumption are monitored by constantly adjusting the fan rotation speed so as to achieve minimum system power consumption. Accordingly, a fan adjustment and control strategy for optimizing the power consumption is set, and by means of the testing, a tester can confirm that the system power consumption of the server is minimum when various compression software can operate on a server in various working environments.

The embodiment of the invention provides a control terminal and an unmanned aerial vehicle and a control method thereof, the method is characterized in that: target object indication information of aplurality of target objects is determined, and jointing leg information between the plurality of target objects is determined; each encircling flight of the unmanned aerial vehicle for the plurality of target objects indicated by the target object indication information is controlled; during the process of completing the encircling flight from one target object to the next target object, the unmanned aerial vehicle is controlled to fly to the next target object according to the jointing leg information. According to the above way, the unmanned aerial vehicle is controlled during the flight process to realize the target object encircling flight and airline flight, so that the unmanned aerial vehicle is flexible and effective during the flight, and the application requirements from various industries or fields to the unmanned aerial vehicle can be satisfied.

The invention discloses a double salient electro-magnetic motor asymmetric current control system and method. The system is provided with a novel power control circuit topology, each phase of a motor is controlled by an individual full bridge, the system comprises four power switch pipes, positive and negative amplitude values of phase current of the motor can be individually controlled, the system is provided with a closed-loop system of a rotating speed-asymmetric current ring, a rotating speed ring generates a reference current signal transmitted to a current amplitude value calculation module, an optimized positive and negative semi-cycle current reference value is obtained by the current amplitude value calculation module by the aid of an algorithm 'based on the maximum magnetic energy product principle', sampled current and the positive and negative semi-cycle current reference value given by a controller are compared to generate a control signal, and a control inverter bridge circuit controls the motor. The torque current ratio and the efficiency of the motor can be improved, torque pulsation is decreased, and control reliability is improved.

The invention discloses a current-source-type multi-input full-bridge converter with a single primary winding, belonging to the field of power electronic converters. The converter comprises N input channel circuits, a full-bridge converter circuit (20) and an output rectifier circuit (30), wherein N is a natural number larger than 1, each input channel circuit comprises a DC power source, an inductors, a switching tube and a diode, the cathodes of all the diodes in the N input channel circuits are connected, the cathodes of all the DC power sources are connected, the full-bridge converter circuit (20) comprises four full-bridge switching tubes and one transformer, and the output rectifier circuit (30) comprises a full-bridge rectifier circuit and a filtration capacitor. The transformer of the converter provided by the invention is provided with only one winding and 4+N switching tubes so that small converter size and simple structure are achieved. When the switching tubes in the input channels are simultaneously switched off, the DC power sources are connected in parallel to supply power to the loads so that a plurality of input sources supply power to the loads simultaneously or in shared time.

The invention provides an impeller surface equivalent wind speed prediction method of an impeller surface of a large-scale wind turbine generator. The method comprises the following steps: step 1, measuring wind speed of each height of a virtual impeller surface in front of the wind turbine generator through a laser radar; step 2, calculating the equivalent wind speed of the virtual impeller surface according to the measured wind speed data of each height of the virtual impeller surface; step 3, acquiring an actual impeller surface equivalent wind speed by utilizing the wind turbine generatormodel and sensor measurement data; and step 4, inputting the calculated equivalent wind speed of the virtual impeller surface into a BP neural network after passing through a time shifting model. Themethod adopts the laser radar for wind measurement, the accuracy is high, power loss caused by wind measurement lag is eliminated, the equivalent wind speed of the impeller surface can be accurately predicted, and therefore the design of an advanced prediction control strategy of the wind turbine generator set is more effectively served, and reliable input is provided for advanced prediction control of the large-scale wind turbine generator set.

The invention discloses an urban road network signal control method and device based on vehicle path information. The method specifically comprises the following steps: acquiring target path data, demand generation time data, speed data, road network geometric data and conflict phase data of all vehicles in a road network in a target time period; recording the number of iterations m = 1, and initializing the vehicle arrival time of each intersection; clustering arriving vehicles of the same lane into a motorcade, constructing and solving a single-point signal control model taking delay minimization as a target, and optimizing vehicle leaving time at intersections one by one; calculating the vehicle arrival time of each intersection in the (m + 1) th iteration, and if the vehicle arrival time is not converged and m =m + 1, continuously optimizing the vehicle departure time; and if convergence occurs, taking the vehicle arrival and departure time of the mth iteration as the final vehicle arrival and departure time, and obtaining an intersection signal control scheme. According to the iknvention, delay minimization is taken as a target, a signal control scheme of each intersection of the road network is optimized, and the service level of the road network is effectively improved.

The invention discloses a micro grid energy control method comprising the steps of getting a Pareto optimal solution set using a non-dominated sorting genetic membrane algorithm, and choosing an appropriate solution from the Pareto optimal solution set as needed to control the generation power of a distributed power supply. The obtained solution set is uniformly and widely distributed and is diverse, premature convergence can be avoided as much as possible, and the selectivity and accuracy of the control strategy of the distributed power supply in the micro grid in practical application are ensured. The invention further discloses a processor for implementing the method, and a micro grid energy control system. The system comprises a control device, and the control device comprises the processor. The processor and the micro grid energy control system also have the advantages stated above, which are not repeated here.

The invention relates to a meteorological condition prediction method and device for a self-driving vehicle, a vehicle and a controller, and aims to solve the problem that in the prior art, the real meteorological environment of the environment where the vehicle is located cannot be predicted, so that safety threats exist in vehicle driving. The method comprises the steps of determining a third initial rainfall level based on windscreen wiper information, determining a light level based on lamplight information, and determining an illumination level based on visibility information and information of an environment scene where a vehicle is located; determining a final rainfall level based on the first initial rainfall level, the second initial rainfall level and the third initial rainfall level; determining a final illumination level based on the illumination level, the light level, the pollution level information and the weather type information; determining whether the environment temperature exceeds the standard or not based on the environment temperature information; and according to the result, determining whether the meteorological condition of the current environment of the vehicle meets automatic driving or not.

The invention discloses a parallel connection and direct connection control method for a multi-branch power battery system, and the method comprises the steps: comparing the voltage of each branch power battery and calculating the voltage difference of each branch power battery before the parallel connection and direct connection of power batteries; then, parallel direct hanging control of various working conditions is carried out based on the comparison result of the power of the power batteries of the branches and the calculation result of the voltage difference of the power batteries of the branches; according to the method, multi-branch energy division is achieved, impact-free direct hanging control is achieved, no large circulation is generated, a perfect software control strategy is provided, and parallel direct hanging of all working conditions is achieved.

The invention relates to a displacement monitoring device and method for a main distributing valve of a hydraulic turbine governor. The displacement monitoring device comprises a PLC controller, an isolation transmitter and a switch, wherein the PLC controller is electrically connected with a magnetostrictive displacement sensor through the isolation transmitter, and the displacement sensor is used for checking a position signal of a limiting plate of the main distributing valve; the PLC is in communication connection with the switch, the switch is in communication connection with the industrial personal computer and the in-situ control unit, and the PLC is powered by the power supply conversion module; and the magnetostrictive displacement sensor is used for being arranged on the side face of a main distributing valve base, and the main distributing valve base is connected with a main distributing valve element. The displacement monitoring device is reasonable in structural design, convenient to install, easy to operate and complete in function, the control safety of the speed regulator is improved, and the risks of unit equipment damage and personnel safety caused by faults of amagnetostrictive displacement sensor of a main pressure distribution valve of the speed regulator or following faults of the main pressure distribution valve are reduced.