3 results about "Frequency shaping" patented technology

The present invention provides a power control method and apparatus for an underwater thruster motor, comprising: acquiring underwater environmental pressure values ​​and underwater thruster motor stator temperature values ​​to generate a comprehensive compensation coefficient; identifying the influence of hydrodynamic disturbances on motor flux linkage based on the rotational speed signal fed back by the underwater thruster motor rotor position sensor, and dynamically correcting flux linkage commands using a sliding mode variable structure control algorithm to suppress flux linkage distortion; adaptively allocating the current components of the motor stator direct axis and quadrature axis according to the thrust requirements of the vehicle, combined with the comprehensive compensation coefficient and the corrected flux linkage commands, and generating a basic drive signal; performing high-frequency shaping on the basic drive signal to output an adapted voltage pulse sequence, and controlling the motor electromagnetic torque to track the target value corresponding to the thrust requirements in real time. This invention improves the operational stability and control accuracy of the underwater thruster motor.

This application belongs to the field of communication technologies, and provides a communication method and apparatus, to improve sensing performance while communication performance of a communication system is ensured. In the method, when elements in [b(n)] meet a first feature, a second feature, a third feature, or a fourth feature, an optimal compromise between communication and sensing performance can be implemented, so that the sensing performance can be improved while the communication performance of the communication system is ensured, that is, an optimal frequency shaping coefficient is adaptively selected to achieve joint optimal performance of communication and sensing.

This invention discloses an oscillator detection circuit, relating to the field of integrated circuit technology, to solve the problem of poor accuracy in oscillator detection and judgment by the main control chip due to existing detection circuits. The detection circuit includes a frequency shaping circuit, a high-voltage generation circuit, a negative-voltage generation circuit, and a voltage conversion circuit connected in stages. The frequency shaping circuit shapes the oscillator's output signal; the high-voltage generation circuit processes the output signal of the frequency shaping circuit to generate a high-voltage signal; the negative-voltage generation circuit provides a negative bias to the detection circuit; and finally, the voltage conversion circuit converts the received signal into a voltage output related to the oscillator frequency. This improves the accuracy of oscillator detection and judgment by the main control chip.