2results about How to "Improve angle estimation accuracy" patented technology

The application relates to a phase increment generation method and device of a transmitting antenna and a computer device. The method comprises the following steps: acquiring a phase sequence generated by a phase shifter; selecting multiple groups of phase increment groups for all transmitting antennas according to a preset selection condition, each group of phase increment groups comprising phase increments corresponding to all transmitting antennas; determining a Fourier input sequence of each transmitting antenna in each group of phase increment groups based on the multiple groups of phase increment groups and the phase sequence; determining a noise evaluation parameter of each group of phase increment groups according to the Fourier input sequence of each transmitting antenna; and determining the phase increments of all transmitting antennas according to the noise evaluation parameters of all groups of phase increment groups. The method can improve the angle estimation accuracy of a radar.

The invention relates to the technical field of non-inductive control, in particular to a high-speed permanent magnet motor non-inductive control method and system based on fast Fourier transform, and the method comprises the following steps: obtaining the operation data of a high-speed permanent magnet motor, constructing a current pulsation state mark, extracting a main response frequency, matching a channel, collecting a response, and calculating a gain difference value; and generating a disturbance regulation and control parameter group table item. According to the method, a gradient change sequence is constructed through a stator three-phase current instantaneous peak value, an electric inertia abrupt change state is dynamically judged, the deviation trend of a channel operation state is effectively sensed, meanwhile, disturbance frequency main response is locked through Fourier transform, and a response gain difference value after current injection serves as a sensitivity reference; injection configuration and disturbance regulation and control parameters are adjusted in real time, and the rotor electrical angle estimation precision, the current control response sensitivity and the dynamic stability are improved under the condition that a sensor is lacked.