Closed-loop Hall plasma exciter life monitoring system

Abstract

The invention discloses a service life monitoring system for a closed-loop Hall plasma exciter. The service life monitoring system comprises a current detection circuit, an oscilloscope, a control system, a signal generator and a high-voltage power supply which are connected in sequence, the high-voltage power supply is further connected with a high-speed solid-state relay which is further connected with the control system. The system can monitor the current change condition in the working process of the plasma exciter in real time, safety accidents caused by aging and too high temperature of the exciter are avoided, and the service life of the plasma exciter is prolonged.

Description

technical field [0001] The invention belongs to the technical field of plasma actuator body control, and in particular relates to a closed-loop Hall-type plasma actuator life monitoring system. Background technique [0002] In recent years, active flow control technology has developed rapidly. Plasma flow control is a new type of active flow control technology based on plasma aerodynamic excitation, which has broad application prospects in improving the aerodynamic characteristics of aircraft / engines. The main device used to realize plasma flow control is the plasma actuator. At present, the dielectric barrier discharge (DBD) plasma actuator is commonly used. The actuator consists of upper and lower electrodes and an insulating dielectric layer in the middle. It has the advantages of small size, light weight, short response time, wide excitation frequency band, no mechanical moving parts, and can control large flow and global airflow by using small and local airflow disturba...

AI Technical Summary

Problems solved by technology

But the disadvantage is that the plasma actuator has a limited service life and cannot be under high load for a long time

Due to the long-term discharge of DBD, the surface of the insulating dielectric layer will be subjected to severe plasma etching, and there will be degradation phenomena, resulting in aging of the insulating layer, which is easily broken down by an external electric field, and seriously shortens the service life of the actuator.

Once the insulating dielectric layer of the plasma actuator is broken down, the equivalent resistance of the insulating dielectric layer suddenly decreases, the current in the loop system increases sharply, and the generated transmission charge and discharge heat continue to increase, causing the temperature of the insulating layer to rise continuously, which is easy to cause a fire other security risks

[0004] At present, the research on plasma actuator life detection is relatively scarce. Based on the above requirements, the present invention proposes a closed-loop Hall-type plasma actuator life monitoring device. Intelligent control of the state, avoiding the plasma actuator working in a critical state for a long time, reducing the possibility of accident risk, and effectively prolonging the service life of the plasma actuator

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