36results about How to "The control method is stable" patented technology

The invention relates to a winch control system for variable diameter cables. The winch control system comprises a lead screw mechanism and a winding drum mechanism which cooperate to complete cable unwinding and winding motions; and the winch control system further comprises a control mechanism for controlling the winding and unwinding process of the cables, wherein the control mechanism collectsrotation angle information and cable diameter information from the lead screw mechanism and the winding drum mechanism, and the control mechanism obtains and stores various parameters of the cables through calculation and meanwhile gives feedback on a rotating speed adjusting instruction to the lead screw mechanism and the winding drum mechanism. The invention further provides a control method using the control system, and according to the control method, synchronous control over the lead screw mechanism and the winding drum mechanism can be achieved, and winding and unwinding of the variablediameter cables are completed. According to the winch control system for the variable diameter cables and the control method thereof, winding and unwinding operation of the variable diameter cables can be realized through a cable arranging lead screw and a cable storing winding drum, and supported encoders and a control system are arranged to realize automatic measurement, calculation and control, so that operation is convenient, control is accurate, and therefore the control system and method can be widely applied to various winch devices requiring winding and unwinding of variable diametercables; and meanwhile, the problem of disordered cable arrangement is avoided, namely the cables can be reasonably arranged according to cable diameter changes, and accordingly stable and efficient operation can be realized.

The invention relates to an intelligent big field irrigation system-oriented intelligent prediction and control method which comprises the following steps: an irrigation process model is built based on hydrological characteristics of an irrigation canal, an irrigation object is calculated after agriculture irrigation information is collected, control deviation is calculated according to the irrigation object and water level data of a sensor, control rate output of a controller is calculated based on the control deviation, an ultra-short feedback intelligent control rate and a current predicted control rate variation quantity are respectively calculated according to the control deviation and the control rate output of the controller, an intelligent prediction control rate is calculated and input into an irrigation process model, water level value is output via the irrigation process model, whether the irrigation object is attained is determined via difference between the water level value and the irrigation object, cyclic operation is performed, and finally intelligent irrigation is achieved after a goal value of a controlled object is accurately attained. The invention provides a stable control method with rapid convergence for agriculture irrigation time lag processes.

The invention discloses an electromagnetic drive type magnetic suspension rotating platform which comprises an electromagnetic suspension structure positioned on an outer ring and an electromagnetic drive structure positioned on an inner ring, wherein a rotating platform casing is arranged outside the electromagnetic suspension structure and the electromagnetic drive structure; the electromagnetic suspension structure comprises an annular electromagnetic suspension iron core; a plurality of teeth are symmetrically arranged on the annular electromagnetic suspension iron core along the circumference; an electromagnetic suspension winding is wound on each tooth; a high-precision air gap sensor is arranged at the clearance between every two teeth; an annular suspension conductor plate is arranged above the annular electromagnetic suspension iron core; the electromagnetic suspension structure comprises an annular electromagnetic drive iron core; three groups of teeth are symmetrically arranged on the outer side of the electromagnetic drive iron core along the circumference; the electromagnetic suspension windings are continuously wound on each group of teeth; each group of electromagnetic drive winding is in a link type structure; an annular permanent magnet rotor is arranged outside the annular electromagnetic drive iron core; and a photoelectric encoder is arranged on a rotating shaft of the rotating platform casing. The assembly difficulty is reduced and the manufacturability is improved.

The invention discloses a USB port plugging electron label method and device; the device provides a wireless communication technical method, i.e., an USB port plugging electron label; the method comprises the following steps: sending USB port plugging motions to a reception device and system; recording related operation time. In the prior art, a system host cannot install terminal management software or USB control management software, and paper label and hardware lock cannot provide audit operation time records; the novel method and device can solve said problems.

The invention discloses a control method of a gas water heater. The control method includes the steps that a set heat value is determined; data collection time is set, timing begins from starting of the gas water heater, and the heat values in the data collection time are calculated every other the set data collection time; the total heat value is obtained by sequentially adding of the heat valuesobtained through calculation; and the total heat value is compared with the set heat value, and the gas water heater is controlled to work according to a comparison result. By means of the control method of the gas water heater, the problem that oxygen defect flameout protection in an existing water heater is limited by the space can be solved to a certain degree.

The invention discloses a vehicle brake system, a control method of the vehicle brake system and a vehicle. The brake system comprises a brake pedal; a driving device for driving the brake pedal; a hydraulic brake device with a pushrod, wherein the pushrod is provided with a sliding groove, the brake pedal is slidably connected with the pushrod and the brake pedal can slide between a first limit position and a second limit position of the sliding groove; a control device and a motor, wherein the control device controls the brake pedal to rotate to a preset position; when the brake pedal is stepped down, the control device outputs a control signal to enable the motor to brake and charge a battery; when the brake pedal is stepped down and continuously rotates after the brake pedal rotates to the second limit position, the pushrod is pushed to realize braking through a brake master cylinder. The vehicle brake system disclosed by the invention has the advantages that the associated control between the stepping of the brake pedal and electric braking and hydraulic braking is realized through a mechanical structure, and the control method is simple and stable.

The present invention provides an air-conditioner and an air-conditioner control method. The air conditioner includes an outdoor unit (2) having an outdoor heat exchanger, a plurality of indoor units (3a to 3d) each having an indoor heat exchanger, a refrigerant circuit, which links the outdoor heat exchanger, a compressor (20), and the indoor heat exchangers together, electric motor operated valves (33a to 33d), which are provided in the refrigerant circuit and serve to adjust the amount of refrigerant flowing into each of the indoor heat exchangers, respectively. a discharge pipe thermistor (24)serving to detect the temperature of the discharge pipe of the compressor, and an outdoor controller (27). In the case where there are a plurality of indoor units that are not operating during heating operation, the outdoor controller controls, on the basis of the delivery temperature, the degrees of opening of the motor-operated valves corresponding to the indoor units that are not operating. Further, the outdoor controller individually corrects the degrees of opening of the motor-operated valves corresponding to the indoor units that are not operating. According to the present invention , the air conditioner is capable of stabilized refrigerant control even when a multiple type air conditioner is performing heating operation or even when there are a plurality of indoor units that are not operating.

The invention discloses a self-adaptive landing deck control system and method for a rotor-type aircraft. The system includes a base, a landing deck, a MEMS gyroscope, a Hook hinge, a hydraulic control valve, an ECU control center and a hydraulic controller. Three sets of Hooke hinges are evenly distributed along the circumference of the bottom surface of the landing deck. Three groups of Hooke hinges are evenly distributed along the circumference on the upper surface of the base. The base is mounted on the hull of the ship. Hook hinge groups on landing deck and base are staggered. The top end of the push rod of the hydraulic valve is connected to the landing deck through the Hook hinge, and the bottom end is connected to the base through the Hook hinge. Two MEMS gyroscopes are mounted on the landing deck and the base, respectively. When the aircraft lands, the signal of the MEMS gyroscope is transmitted to the ECU control center. After calculation, the control center transmits the instruction to the hydraulic controller. The hydraulic controller sends instructions to each hydraulic valve to adjust the length of the push rod of each hydraulic valve, so as to maintain the landing. The deck is always level and raised above the deck of the ship and maintains the same altitude. The system of the invention has stable performance and high control precision.

The present invention relates to a quality regulation control method of central air-conditioning refrigerating station and its system. It belongs to a method for controlling operation of central air-conditioning refrigerating station and its system. Said system includes internal weather parameter monitoring portion, central air-conditioning system operation parameter monitoring portion, quality regulation control main machine, cold water machine unit control unit for controlling water supply temperature for refrigeration, cooling tower frequency conversion control unit for controlling cooling tower outlet temperature, refrigerating water pump frequency conversion control unit and cooling water pump frequency conversion control unit. Besides, said invention also provides the concrete steps of its quality regulation control method.

The present invention relates to a winch control system for variable-diameter cables, which includes a screw mechanism and a reel mechanism that cooperate to complete the cable unwinding and cable take-up movement, and also includes a control mechanism for controlling the cable retraction process. The control mechanism Collect the rotation angle information and cable diameter information from the screw mechanism and the reel mechanism, obtain and store various parameters of the cable through calculation, and feed back the speed adjustment instructions to the screw mechanism and the reel mechanism at the same time. At the same time, the invention provides a set of Utilizing the control method of the control system, the synchronous control of the lead screw mechanism and the reel mechanism can be realized, and the rewinding and unwinding of the variable-diameter cable can be completed. The invention realizes the cable receiving and unwinding operation of the variable diameter cable through the cable discharge screw and the cable storage drum, and is equipped with an encoder and a control system to automatically measure, calculate and control, with convenient operation and precise control, and can be widely used in various On the winch equipment that needs to retract and release the variable-diameter cable, there will be no problem of cable arrangement confusion at the same time, and the cable can be arranged reasonably according to the change of the cable diameter, and the work is stable and efficient.

The present invention features that zinc acetate aqua in 0.001-5M concentration reacts with hydrazine hydrate and ethylene diamine aqua to obtain milky sol, and the sol is deposited to separate and stoved to obtain the one-dimensional nanometer belt structure precursor of ZnO.xZn(CH3COO)2.yH2O (x=0.15 and y=0.85) and in decades micron to several mm length, 200-500 nm width and 10-30 nm thickness; and the precursor is annealed at 300-1100 deg C to obtain the tactic one-dimensional mesoporous zinc oxide grain nanometer belt with pore size of 10-80 nm and zinc oxide grains in 10-30 nm size and [001] orientation. The product of the present invention may be used in producing gas sensor, catalyst, image record material, piezoelectric material, optical material, etc. and the process of the present invention has fast reaction speed, low power consumption, low cost and easy application in industrial production.

The invention relates to a quadruped robot movement track control method based on a PSO-PD (Particle Swarm Optimization-PD) neural network. The quadruped robot movement track control method comprises the following steps: (1) calculating a target falling point of a robot on a movement track; (2) inputting the target falling point and a feedback body gravity center position into an input layer of the PSO-PD neural network, performing linear conversion, inputting into a first hidden layer, performing ratio calculation and differential operation, performing linear conversion, inputting into a second hidden layer, and acquiring instruction displacement in an x direction and a y direction, inputting into a third hidden layer, calculating an instruction displacement distance, instructing a body direction, inputting into a fifth layer, performing foot tract control and steering control on a quadruped robot, inputting into a sixth layer, adjusting the posture of the quadruped robot in case of disturbance, inputting into a seventh layer, calculating the body direction and the body gravity center position of the quadruped robot, feeding back the body direction to the fifth layer, and feeding back the body gravity center position to the input layer. The quadruped robot movement track control method has relatively good non-linear decoupling control capability, is precise in control and good in stability, and has relatively good anti-interference properties.

The invention relates to an intelligent big field irrigation system-oriented intelligent prediction and control method which comprises the following steps: an irrigation process model is built based on hydrological characteristics of an irrigation canal, an irrigation object is calculated after agriculture irrigation information is collected, control deviation is calculated according to the irrigation object and water level data of a sensor, control rate output of a controller is calculated based on the control deviation, an ultra-short feedback intelligent control rate and a current predicted control rate variation quantity are respectively calculated according to the control deviation and the control rate output of the controller, an intelligent prediction control rate is calculated and input into an irrigation process model, water level value is output via the irrigation process model, whether the irrigation object is attained is determined via difference between the water level value and the irrigation object, cyclic operation is performed, and finally intelligent irrigation is achieved after a goal value of a controlled object is accurately attained. The invention provides a stable control method with rapid convergence for agriculture irrigation time lag processes.

The invention discloses a refrigerant pump control method and device and an air conditioning unit. The method comprises the steps that operating states of the unit are detected, wherein the operatingstates of the unit at least comprise operating conditions and an operating load; the optimal liquid supply flow of a refrigerant pump is determined according to the operating states of the unit; and the opening degree of the refrigerant pump is controlled according to the optimal liquid supply flow. The problem that the liquid supply flow of a condensation pump in the prior art cannot be adjustedaccording to the operation conditions of the unit is solved, the optimal refrigerant flow can be provided for a compressor, the comprehensive energy efficiency of the unit is remarkably improved, andthe operation reliability of the unit is enhanced.