6results about How to "Reduced control accuracy" patented technology

This invention discloses a dual closed-loop control system and method for rubber mixing pressure in a rubber mixing mill, relating to the field of automation control technology. The system sets a target pressure, monitors the feedback value of the external pressure closed loop, acquires the external pressure closed loop feedback value, calculates a first input value based on the target pressure and the external pressure closed loop feedback value, obtains a first output value based on the deviation between the first input value and a preset first input value threshold, uses the first output result as the input value of the internal pressure closed loop, collects the detected value of the pump inlet pressure, calculates a second input value based on the first output result and the detected pump inlet pressure, adjusts the control pressure of the pump inlet based on the deviation between the second input value and a preset second input value threshold, and controls the speed of the servo motor through a servo controller to stabilize the pump inlet side pressure.

The invention relates to the technical field of power electronics, and discloses a power factor correction method and system for an LED power supply. The method comprises the steps that an analog-digital hybrid control circuit based on a memristor is constructed, and PFC loop parameters are adjusted in real time by means of the non-volatile resistance change characteristic of the analog-digital hybrid control circuit; acquiring running state data and inputting the data into the control processor; optimizing memristor configuration by taking the power factor, the total harmonic distortion rate and the efficiency as fitness functions through a genetic algorithm; dynamically applying a voltage pulse to accurately adjust the resistance value of the memristor; and continuous self-tuning is carried out based on closed-loop feedback. The system comprises a memristor programmable gain amplifier, a sensor, a control processor and a health monitoring module. According to the scheme, hardware-level rapid, fine and self-adaptive PFC parameter regulation and control are realized, and the power factor stability, the system efficiency and the long-term reliability are improved.

The application discloses a mechanical arm path planning and automatic control method, comprising the following steps: installing an inclination sensor on a swing arm, a bucket rod and a rocker position of an excavator respectively, and measuring a bucket relative angle, a bucket rod relative angle and a swing arm relative angle after calibration; establishing a vehicle body reference coordinate system with a swing arm rear hinge point as an origin; establishing a local coordinate system of each degree of freedom according to a right-hand rule, and converting to the vehicle body reference coordinate system; recording Xa coordinates and Za coordinates of a current position of a bucket tooth tip in the vehicle body reference coordinate system, confirming Xb coordinates and Zb coordinates of a target position, obtaining a plurality of intermediate process points after discretization, calculating a control amount through an error solution of the target position and the current position, controlling the movement of each degree of freedom, and realizing the vertical movement of the excavator bucket tooth tip position. The application can control the swing arm lifting, the bucket rod retraction and swing, and the bucket retraction and swing, realize the automatic vertical lifting function of the excavator tooth tip position, and effectively improve the working efficiency of the excavator.

The present application relates to the technical field of pipetting workstations, and more particularly to a double-deck rotary disc type pipetting workstation and a method for using the same. The double-deck rotary disc type pipetting workstation comprises an upper disc, a lower disc, a driving mechanism and a pipetting module. The upper disc is arranged above the lower disc. The driving mechanism is in power connection with the upper disc and the lower disc, and can drive the upper disc and the lower disc to rotate. The upper disc is provided with a plurality of consumable boxes for loading pipette tips. The lower disc is provided with a plurality of constant temperature modules, a plurality of magnetic modules for adsorbing magnetic beads, a plurality of mixed well plates and a plurality of liquid storage well plates. The constant temperature modules are provided with constant temperature well plates, and the magnetic modules are provided with magnetic well plates. The pipetting module can move between the upper disc and the lower disc. The pipetting module only moves in the Z-axis direction, and has a lower control difficulty and a lower required control precision, so that the fault tolerance is higher, the reliability is higher, and the pipette tips will not be missed or dropped due to the deviation in the control movement.

The application provides a cooking utensil control method and control system, aiming at solving the problem that the cooking utensil in the prior art has a single reference measured temperature object when controlling the heating power of a heater, it is difficult to accurately judge the whole food heating environment, and the cooking effect is poor. The cooking utensil control method provided by the application collects four actual temperatures of a liner cavity, a liner side wall, a liner heated area and a food rack; compares the actual temperature of the liner cavity with the same time temperature of the stored liner cavity temperature change curve of the food to be cooked in real time; and controls the heating power of the heater by referring to the temperature change curves corresponding to the liner cavity, the liner side wall, the liner heated area and the food rack. By storing the temperature change curves of the four objects with the cooked food, the temperatures of the four objects are heated according to the stored temperature change curves during the heating process, and the stability of the food heating is ensured.

This invention discloses a control method and a control device. The control method includes: entering a first execution gear stage and determining a first target gear at this stage; acquiring execution information of the previous first target gear, including target position, drive duty cycle, and actual position; if the first position difference between the preset optimal position of the first target gear in the first execution gear stage and the actual position of the previous first target gear exceeds a first execution gear threshold, correcting the target position or drive duty cycle of the current first target gear; the previous first target gear and the current first target gear are in different first execution gear stages. In this invention, when the gear shifting control accuracy of the previous gear shifting operation is low, the control accuracy of the current gear shifting operation can be improved by correcting the target position or drive duty cycle of the current first target gear, thereby increasing the success rate and accuracy of gear shifting and ensuring the driver's driving experience.