The de-icing method using synthesized envelope modulation signals from resonance low-frequency and ultrasonic signals

This paper proposes a method of combining low-frequency resonance signals and ultrasonic signals through envelope modulation to form an excitation signal for de-icing. Modulated signals are applied to a single type of actuator for de-icing, aiming to simplify the equipment required for de-icing and reduce power consumption. The envelope modulation signal is generated by combining low-frequency signals with ultrasonic signals using amplitude modulation, the Hamming window function, and the Hanning window function, respectively. The de-icing excitation effects of the modulation signals generated by different modulation methods at various initial phases on the ice-covered leading edge of the blade are calculated through numerical simulations. Simulations show that the modulation method and initial phase have a significant impact on the de-icing excitation effect. Experiments are conducted to explore the de-icing effectiveness and power consumption under different envelope modulation signal excitations. The results indicate that the envelope modulation signal de-icing method can simplify equipment and reduce power consumption, showing promising development and application prospects.