一种单相脉宽调制整流器传感系统故障特征提取与主动阻断控制方法
By constructing an unknown input sliding mode observer and designing an unknown input variable estimation scheme, fault feature extraction and active blocking control of a single-phase pulse width modulation rectifier sensing system were realized, solving the control instability problem caused by sensing system faults and improving the system's emergency survivability and control simplicity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SOUTHEAST UNIV
- Filing Date
- 2024-09-24
- Publication Date
- 2026-07-17
AI Technical Summary
Existing single-phase pulse width modulation rectifier sensing systems are prone to failure under the influence of factors such as high temperature, high humidity, chemical corrosion, and static electricity. This results in the inability to achieve effective closed-loop control of grid-side current and DC-side voltage, affecting the stability and safety of industrial control systems. Existing fault diagnosis methods are highly complex and require the introduction of redundant sensors, increasing system costs.
An unknown input sliding mode observer is constructed. By observing state variables online, an unknown input variable estimation scheme is designed, fault characteristics are extracted, and an active blocking control system is established. There is no need to introduce redundant sensors. The observation values of the unknown input sliding mode observer are used to replace the measurement values of the fault sensing system, so as to achieve rapid fault detection and active blocking.
It achieves accurate and rapid fault feature extraction and active blocking control under various sensor system failure conditions, improves the emergency survivability of single-phase pulse width modulation rectifiers, simplifies hardware cost and complexity, and facilitates execution in digital microprocessors.
Smart Images
Figure CN119134930B_ABST