2 results about "Loop shaping" patented technology

The present application relates to a strong static unstable launch vehicle adaptive and robust stability control method, gap measurement is performed on the rated and deviation models and the nominal model at different times of the whole flight segment, the segmentation of the rated and deviation models in the time dimension is completed, and the robust controller in each segment is designed; the nominal model is tuned by using loop shaping method to obtain the model G s ; the model G s is obtained by order reduction of G sb , the uncertainty envelope between G sb and the rated and deviation model set is measured to obtain the controlled object G p containing multiplicative uncertainty; the control weight function W u and the error weight function W e are designed; G p , W u and W e are formed into a generalized robust control design object P, which is substituted into the robust control design architecture, and the robust controller is obtained by using the mu synthesis iterative method and order reduction; the adaptive adjustment law of the loop gain is designed and multiplied by the robust controller to stabilize the flight attitude of the launch vehicle in the current segment. The problem of attitude stability control of a strong static unstable launch vehicle is solved.

A resonator is disposed on a circuit board and includes a first coupling line, a second coupling line, at least one first resonant line, and at least one ground plane. The at least one first resonant line forms a loop shape. The first coupling line, the second coupling line, and the at least one first resonant line are located on a conductive layer of the circuit board. The first coupling line and the second coupling line are parallel to a first coupling portion and a second coupling portion of the at least one first resonant line, respectively. The first coupling line and the second coupling line couple the at least one first resonant line and are disposed inside the at least one first resonant line. The at least one ground plane is located on another conductive layer of the circuit board. Thus, the layout configuration flexibility of the circuit board is improved. The present disclosure also relates to a circuit element.