5results about How to "Fast control" patented technology

This invention discloses a three-impulse control method and system applicable to chemical waste heat boilers, belonging to the technical field of boiler automatic regulation. It includes the following steps: acquiring the operating parameters of the chemical waste heat boiler; collecting and storing the boiler drum water level, steam flow rate, and feedwater flow rate; calculating the steam flow rate change rate; determining the current operating state; setting the boiler drum set water level; calculating the target feedwater flow rate using the set water level, current boiler drum water level, steam flow rate, steam enthalpy, and energy conversion coefficient; selecting a comprehensive state coefficient based on the current operation; calculating the feedwater regulation amount using the selected comprehensive state coefficient combined with the target feedwater flow rate; generating a feedwater regulation command based on the feedwater regulation amount and transmitting it to the chemical waste heat boiler. This invention has the effect of automatically and timely controlling the water level of the chemical waste heat boiler with good control stability.

A finite-time anti-interference control method for a universal pneumatic flexible manipulator includes the following steps: The universal pneumatic flexible manipulator is simplified to a link model using the D-H method, and kinematic analysis is performed to obtain the kinematic analysis model and the position of the end point of the universal pneumatic flexible manipulator; based on the kinematic analysis model of the universal pneumatic flexible manipulator, a dynamic model of the universal pneumatic flexible manipulator is established using the Euler-Lagrange method; the uncertainty of the universal pneumatic flexible manipulator is considered as a disturbance, and a second-order mathematical model of the pneumatic flexible manipulator is established; a finite-time extended state observer is designed to estimate the disturbance, and based on the disturbance estimate, a finite-time backstepping controller is designed to compensate for the influence of the disturbance on the system; to address the model uncertainty, a finite-time control method is designed to compensate for the influence on the position control accuracy of the pneumatic flexible manipulator, exhibiting strong robustness and high control accuracy.

This invention relates to the field of automatic control technology, and in particular to a method and system for asymmetric preset performance control of a cascade continuous stirred reactor without initial conditions. The method includes establishing a mechanistic model of the cascade continuous stirred reactor, transforming it into an error equation for the cascade continuous stirred reactor, pre-specifying that the change in reactant concentration error at the output of the cascade continuous stirred reactor satisfies a banded constraint space, converting the banded constraint space into a symmetric constraint space, constructing a radical-type algebraic saturation function to map the symmetric constraint space into a bounded symmetric constraint space, superimposing an exponential finite-time decay function on the bounded symmetric constraint space to construct a bounded symmetric constraint space without initial conditions, constructing a barrier Lyapunov function based on the bounded symmetric constraint space without initial conditions, and designing an asymmetric preset performance controller without initial conditions using the backstepping method. This invention enables the stable, safe, and rapid operation of the cascade continuous stirred reactor.

The application provides a radio frequency driving circuit and a radio frequency power supply, wherein the radio frequency driving circuit comprises a driving module and a control module; the driving module is used for providing a driving signal to the gate of a radio frequency transistor, so as to drive the radio frequency transistor to periodically turn on and turn off, and make the power amplifier circuit perform radio frequency output; and the control module is used for superimposing an amplified adjusting signal on the gate of the radio frequency transistor, so as to adjust the driving signal, and thus control the drain-source current of the radio frequency transistor. The scheme can effectively improve the driving efficiency of the power amplifier circuit.

The utility model provides a circuit structure for reducing power consumption when an MCU is in a standby state. The circuit structure comprises an AC-DC power supply module, a master control MCU module, a motor driving module and an RF wireless remote control receiving module. The AC-DC power supply module is respectively connected with the power supply end of the main control MCU module, the power supply end of the motor driving module and the power supply end of the RF wireless remote control receiving module; the control end of the main control MCU module is connected with the controlled end of the motor driving module. The master control MCU module controls a second pin IR end to be connected with an IR end of the RF wireless remote control receiving module; the AC-DC power supply module is used for converting AC (Alternating Current) into 24V low-voltage DC; the main control MCU module is used for processing remote control signals, driving a motor and controlling light; the motor driving module is used for driving the direct-current brushless motor; the RF wireless remote control receiving module is used for receiving an RF signal and outputting the signal to the main control MCU module; the power consumption can be effectively reduced.