7results about How to "Control signal stable" patented technology

The invention provides a servo hydraulic system optimization control method and system for a press machine test platform, and relates to the technical field of press machines, and the method comprises the steps: building a state space expression and building a mathematical model of a servo hydraulic system based on dynamic characteristics by deducing mathematical expressions of all components of the system; building a predictive control algorithm based on the mathematical model, solving a quadratic programming problem by adopting a rolling optimization strategy through building a state space predictive model and determining a multi-objective optimization function to obtain an optimal control sequence, and taking a first element of the optimal control sequence as control input at the current moment; feedforward compensation and pressure feedback compensation are introduced, the feedforward compensation constructs a compensation model based on an inverse system of a press transfer function and pre-corrects a control signal, and the pressure feedback compensation designs a digital filter based on a pressure error, fuses a feedforward compensation signal with a pressure feedback compensation signal and superposes the fused signal with the control signal; and obtaining a final control signal.

The invention discloses a six-pulse rectification circuit, and relates to the technical field of power electronics. The six-pulse wave rectification circuit comprises an optical signal receiving and sending unit, a logic judgment unit and a trigger pulse output unit, and the optical signal receiving and sending unit is used for receiving an optical trigger signal and sending an optical return signal; the logical judgment unit is used for performing logical operation and judgment according to the processed signal; and the trigger pulse output unit is used for generating a trigger pulse according to a judgment result, and providing a stable control signal and efficient power management in a complex electrical environment. Through combination of different units, the system can safely and reliably control high-power equipment and timely respond to input signals.

The invention belongs to the technical field of numerical control, and discloses a device and method for inhibiting uncertainty disturbance and improving the conveying performance of an euphausia superba conveying suction pump. The lumped disturbance of the system is estimated by using a disturbance observer, and the constraint of the disturbance upper bound on the conservative property of the control design is avoided; then, a novel sliding mode device is adopted to suppress system lumped disturbance, and the robustness of the system is improved; the novel sliding mode controller adds an exponential function item and a power function item in the reaching law to enable the system state to converge rapidly. A sigmoid function is used for replacing a switching function, continuous control input is achieved, high-frequency buffeting is weakened, and stability and continuity of control signals are guaranteed. Therefore, the positioning precision is improved, a stable control signal can be generated, the control performance of the system is obviously improved, the tracking error is reduced, high-frequency oscillation is avoided, and the control precision of the euphausia superba conveying suction pump servo system is further improved.

The application discloses a traffic adaptive safety switching control method and system, computer equipment and a medium, and belongs to the technical field of intelligent traffic, comprising the following steps: constructing a lattice fluid dynamics model, performing linear stability analysis to obtain a critical condition; periodically judging whether the current traffic flow state tends to be unstable based on the critical condition; when the current traffic flow state does not satisfy the critical condition or the traffic oscillation amplitude in the current traffic flow state exceeds a preset threshold, generating an adaptive safety switching controller enabling instruction; activating and running an adaptive safety switching controller based on road network geometric characteristics according to the adaptive safety switching controller enabling instruction; and feeding back the control signal as an additional adjustment term to the flow evolution equation of the lattice fluid dynamics model, so as to obtain a closed-loop control optimized lattice fluid dynamics model. The method improves the anti-interference ability, overall stability and driving smoothness of intelligent networked vehicle traffic flow in a mixed geometric road network environment.

The invention discloses a sewing machine pedal based on the grating ruler technology, and relates to the technical field of sewing machines, the sewing machine pedal comprises a pedal pull rod and a speed regulator mounting support, the speed regulator mounting support is provided with a speed regulator bottom shell, and the side, away from the speed regulator mounting support, of the speed regulator bottom shell is provided with a speed regulator shell and a speed regulator upper cover; a pull rod is vertically arranged in the speed regulator shell, the lower end of the pull rod is installed on a sewing machine pedal through a pedal pull rod, and a grating control mechanism is arranged on the speed regulator shell. The sewing machine pedal drives the pedal pull rod to move, the pedal pull rod drives the pull rod to move, the pull rod drives the positioning sleeve to move, the positioning sleeve drives the sliding block, the grating piece support and the grating piece to move through the cylindrical pin, the grating piece moves along the detection sliding groove of the grating piece reading head, and the grating piece reading head generates a control signal. And a stable and reliable control signal can be generated according to the moving distance, speed and direction of the grating sheet.

The present invention provides a servo hydraulic system optimization control method and system for a press test platform, which relates to the technical field of presses, including: based on dynamic characteristics, by deriving mathematical expressions of various components of the system, constructing a state space expression, and establishing a mathematical model of the servo hydraulic system; constructing a predictive control algorithm based on the mathematical model, by establishing a state space prediction model and determining a multi-objective optimization function, using a rolling optimization strategy to solve the quadratic programming problem, obtaining an optimal control sequence, and using the first element of the optimal control sequence as the control input at the current moment; introducing feedforward compensation and pressure feedback compensation, wherein the feedforward compensation constructs a compensation model based on the inverse system of the press transfer function to pre-correct the control signal, and the pressure feedback compensation designs a digital filter based on the pressure error, and the feedforward compensation signal is merged with the pressure feedback compensation signal, and the signal is superimposed with the control signal to obtain a final control signal.

The application discloses a kind of multi-pulse signal flexible drive adjusting device and method, belong to radio frequency power supply technical field, solve two-stage different pulse signals in switching process Conflict, leading to the problem of full switch tube conduction in power amplifier.In the device, multi-pulse generator generates multi-stage pulse signal;Switcher switches the pulse signal output by multi-pulse generator;During the switching transition of multi-stage pulse signal: switching enable controller, according to the level of pulse signal before and after switching, gradually generates pulse switching adjustment signal to control at least one of power, frequency output ramp gradually or gradually decrease;And according to the pulse switching adjustment signal generated gradually, gradually generate the control signal of power amplifier;The power amplifier of radio frequency power supply is based on the control signal of power amplifier to drive radio frequency power supply, and gradually correspond to adjust the output power and frequency of radio frequency power supply during the switching transition of multi-stage pulse signal.