5 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.

The invention provides a communication method and device, belongs to the technical field of communication, and is used for improving the sensing performance under the condition of guaranteeing the communication performance of a communication system. In the method, when elements in the method meet a first feature, a second feature, a third feature or a fourth feature, optimal compromise between communication and sensing performance can be realized, so that the sensing performance can be improved under the condition of ensuring the communication performance of a communication system, namely, the sensing performance can be improved by adaptively selecting an optimal frequency shaping coefficient. And the joint optimal performance of communication and sensing is realized. Besides, the user signals can be expanded on the whole carrier bandwidth due to the fact that the elements meet the requirements, and therefore the user signals can occupy the whole carrier bandwidth and maintain sensing precision and resolution in the multi-user scene by determining the first signal.

The application discloses a kind of based on cross-scale space-time frequency shaping femtosecond laser's conformal antenna component manufacturing system and method, belong to micro-nano processing technical field.The system includes ultrafast laser excitation module, laser pulse time / frequency shaping module, pulse detection module, online monitoring module and focusing high-speed scanning galvanometer module.Through the system, realize high selectivity, large format, three-dimensional precision machining to conformal antenna circuit pattern, ensure that substrate is undamaged.Processing process is combined with femtosecond laser time-frequency shaping technology, adjustable pulse sequence and high-speed galvanometer system are used to realize the layering scanning and accurate removal of heterogeneous multilayer structure, avoid the problems of material damage, low size accuracy and other problems existing in prior art.The application also integrates online depth monitoring function, significantly improves processing efficiency and forming quality, and is suitable for high-precision patterning of complex curved surface heterogeneous thin film materials.