32results about How to "Small control deviation" patented technology

The invention provides a stroke detection and debugging method of a guide vane control loop with a pressure distribution valve. The method includes the following steps that: a guide vane control block diagram is designed according to the equipment structure of a pumped-hydro energy storage unit, and an electro-hydraulic converter and pressure distribution valve two-stage amplification mode is adopted to make a guide vane servomotor to act through oil pressure; guide vane servomotor and main pressure distribution valve stroke detection modes are determined; a linkage mechanism and a sensor are manufactured and installed, wherein the sensor is used for detecting the strokes of a main pressure distribution valve and a guide vane, and the linkage mechanism is used for converting the strokes of the main pressure distribution valve and the guide vane into the measurement strokes of the sensor; sensor calibration is performed on the guide vane and the main pressure distribution valve; the zero position of an electro-hydraulic converter and the compensation parameter of the neutral position of the main pressure distribution valve are obtained; and guide vane static reaction testing is performed, the acting condition of the guide vane is observed, and the compensation parameter is finely adjusted, so that guide vane control offset can be minimized; and control parameter setting is performed. With the method adopted, it can be ensured that the guide vane control closed-loop is within a reasonable range and has a certain margin, and therefore, later-stage maintenance and debugging can be facilitated.

The fuel injection pump control device controls a fuel-injector pressure from the injection supply eliminated by the variables of determined measured parameters. The fuel is injected and supplied to a target machine. A learning correction process-implementing device is provided for successive implementation of multiple kinds of learning correction process corresponding to the multiple implemented conditions. The implemented conditions are different in the strictness for a pressure parameter of pressurized parameter as a learning object and are used for the fuel injection pressure controller.

The invention relates to a denitration reductant adding control method based on time difference matching and a control device of the control method. By setting in-situ real-time test points, measuring corresponding parameters and depending on actual characteristics of a catalytic deoxidizing reaction of a denitration device, the time difference of flue gas from a flue gas flow speed and flow rate test point to an ammonia spraying region when the flue gas amount and the concentration of pollutants are changed, and the time difference between ammonia/air for spraying into a grating are mainly calculated, so that synchronous non-time-difference mixing is achieved; meanwhile, the flow speed of front nitric oxide and the flow speed of flue gas are taken as feedforward parameters, the concentration of sprayed and mixed nitric oxide and ammonia is taken as the feedback variable, the weight ratio of the feedforward to the feedback is reasonably set and adjusted, the reductant and the nitric oxide after mixed in flue gas react based on set efficiency before entering the denitration device, the amount of ammonia/nitrogen is rapidly and timely adjusted and matched and flexibly controlled under the working conditions such as various change amplitudes and wild fluctuations, the problem of adverse effects caused by the denitration device, a unit and the like is solved, and a significant effect of promoting pollution reduction is achieved.

The embodiment of the invention provides an equipment control method and device based on a block chain and a server. The method comprises the following steps of sequentially determining equipment control strategies corresponding to current equipment state information according to a node participation sequence of each participation node through a pre-established block chain, determining first project type information of a control project type matched with the equipment state information in a relative equipment control strategy; according to the equipment control association condition between the control item type nodes matching the equipment state information, determining a strategy execution process control curve; further determining second project type information; and after the second project type information is combined, determining a target equipment control strategy from the equipment control strategies to carry out equipment control, so that the integral state expression of theequipment control state and the differential expression between different project types are effectively considered, and the control deviation in the actual equipment control process is reduced.

The invention discloses an electric deviation-correcting device. The device comprises a front conveying belt, a rear conveying belt, multiple compression rollers, a drum, a case, a visual sensor, a parallel light source, a high-speed counter, an industrial computer and a PLC; the multiple compression rollers, the drum and the case are relatively and fixedly arranged; the case drives the drum to rotate and can also drive the drum and the multiple compression rollers to reciprocate horizontally; the visual sensor can detect the deviation of the edge of a sizing material from a center line under the assistance of the parallel light source and transmits the deviation to the industrial computer in real time; the high-speed counter feeds the position of the rear conveying belt back to the industrial computer in real time; the industrial computer arranges feedback information into a group of data, stores the data accumulatively and meanwhile transmits the data to the PLC; the PLC controls horizontal motion of the case according to the feedback data, so that the center line of the sizing material and the radial center line of the drum coincide to the largest extent in the winding process. The deviation is corrected in the winding process, the distance between a deviation-correcting control point and a winding point is made close, and the possibility that a deviation-correcting system is disturbed is lowered.

The embodiment of the invention discloses a control method of a food processing machine. The food processing machine can comprise a pulverizing cup, a heating device, a motor and a temperature sensor.The method can comprise the following steps: detecting the temperature of the inner wall of the pulverizing cup by the temperature sensor in the food processing process; and when detecting that the temperature of the inner wall of the pulverizing cup is less than or equal to a preset first temperature threshold value T1, controlling the heating device to perform heating according to preset powerso as to maintain the temperature of the inner wall of the pulverizing cup to be still more than or equal to a preset second temperature threshold value T2 when the pulverizing cup discharges pulp, wherein the first temperature threshold value T1 is more than the second temperature threshold value T2, and the second temperature threshold value T2 is more than or equal to 60 DEG C. Through the scheme of the embodiment, the temperature of the inner wall of the pulverizing cup still maintains above at least 60 DEG C, the problem that food adhesion on a food processing cup is solved and the cleaning effect is improved.

The invention discloses a multi-robot cooperative control method and device and computer equipment, and relates to the technical field of computers. The method comprises the steps that object information of a to-be-carried object and robot information of current available at least one robot are obtained firstly; according to the object information, position information of carrying insertion holesof the to-be-carried object is recognized; control instructions are sent to at least one robot according to the position information and the robot information, and accordingly front connectors of at least one robot are controlled to be inserted in the corresponding carrying insertion holes in a one-to-one manner; and if it is determined that at least one robot is inserted in the corresponding carrying insertion holes, carrying indication instructions are sent to at least one robot. The multi-robot cooperative control method and device and the computer equipment can replace a manual control manner, accurate cooperative control of multiple robots can be achieved, and control deviation is reduced.

The invention provides a control method of a graphite heater. The control method includes: applying a predetermined voltage to a graphite heater, wherein a voltage value of the predetermined voltage is fixed; starting from a first time after applying the predetermined voltage, performing the operation of: measuring heat transferred by the graphite heater by a heat flow sensor; and performing closed-loop control on the graphite heater based on the measured value of the heat flow sensor and a heating control curve corrected by the first time, wherein the first time is the time when the graphiteheater starts to make a linear response to the applied voltage.

The invention discloses a system for rearview mirror control based on ripples. The system comprises a rearview mirror control switch, a single-chip microcomputer, a motor driving module, a rearview mirror and a ripple detection counting module. The rearview mirror control switch is connected with the single-chip microcomputer, and the motor driving module is connected with a motor arranged in the rearview mirror. The motor driving module and the ripple detection counting module are integrated to a ripple detection counting and motor driving integrated circuit. A voltage modulation circuit and a control register are arranged in the ripple detection counting and motor driving integrated circuit, the voltage modulation circuit outputs supply voltage, the ripple detection counting module is in bi-directional connection with the control register, the control register is in output connection with the motor driving module, and the single-chip microcomputer is in communication connection with the control register through an SPI bus. The invention further discloses a method for rearview mirror control based on the ripples. According to the technical scheme, the problems of large control deviation and poor universality of an existing rearview mirror control technology are solved.

The invention discloses an overlapped sequence valve, which comprises a valve body with certain thickness, wherein a valve core is arranged in the valve body. The overlapped sequence valve is characterized in that one side of the valve body is provided with a pressure detection opening, a pressure meter is connected with the pressure detection opening, the other side of the valve body is provided with a spring, one side, near the valve core, of the spring is provided with a force sensor, the other side of the spring is provided with a regulating screw rod, the spring is arranged at one side of the valve body through an external valve cover, the bottom of the valve body is provided with an oil inlet, an axial hole is formed between the oil inlet and the pressure detection opening, and an oil outlet is formed in the top of the valve body. The overlapped sequence valve has the advantages that the structure is simple, the cost is low, the control deviation is small, and the pressure regulating precision is improved.