3 results about "Gain margin" patented technology

This invention discloses a calibration method, storage medium, and electronic device for a position servo control system. Specifically, it includes: determining the open-loop transfer function and open-loop gain of the position servo control system and drawing a first Bode plot accordingly; determining whether the gain margin and phase margin of the first Bode plot meet set requirements; if both the gain margin and phase margin of the first Bode plot meet set requirements, calibration is completed; otherwise, proceed to the next step; drawing the expected second Bode plot based on the set gain margin and phase margin requirements; determining a calibration function and its parameters based on the first and second Bode plots; and completing the calibration. In the solution provided by this invention, based on geometric processing, the difference between the first and second Bode plots is analyzed to determine the calibration scheme, reducing the amount of data processing and enabling calibration to be completed even without a computer.

The invention discloses a grid-connected inverter hybrid damping control method based on an LCLLC filter, passive damping adopts a mode that a filter capacitor is connected with a resistor in parallel, active damping adopts a state variable feedback mode, and a feedback variable is a filter capacitor current; a core model is a single-phase main circuit topological structure based on an LCLLC filter, and active damping parameters and current QPR controller parameters are designed through gain steady-state errors, gain margins and phase margins, so that the stability and control precision of a system in a full working condition range are ensured.

The application relates to the technical field of typical network configuration control, and discloses a stability domain adjustment method of a typical network configuration control strategy based on sequence impedance analysis, which aims to solve the shortcomings of a non-uniform stability domain framework, unclear MC control impedance characteristics, unclear parameter influence law and insufficient solution precision; the method establishes a control model of the typical network configuration control strategy, constructs a full-order small signal model based on small signal linearization disturbance processing, deduces a sequence impedance model in combination with the conversion relationship between positive and negative sequences and dq axis components, establishes a parameter-stability mapping relationship based on sequence impedance amplitude and phase characteristics in combination with gain margin and phase margin criteria, demarcates a stability domain range through two-dimensional parameter scanning and boundary fitting, and finally simulates and corrects the stability domain, so that the VSG control and the MC control stability domain can be accurately demarcated and compared horizontally, and the network configuration control parameter optimization and the power grid adaptability are improved.