Motion Synchronous Composite Decoupling with Fewer Sensors on Multichannel Hydraulic Force Control for Aircraft...

Area of Science:

• Aerospace Engineering
• Control Systems
• Structural Testing

Background:

• Aircraft full-scale fatigue testing is crucial for flight safety.
• Current tests are lengthy (years) due to slow loading frequencies.
• Increasing loading frequency causes significant errors from structural coupling forces.

Purpose of the Study:

• To develop a novel control strategy to accelerate aircraft fatigue testing.
• To address the challenge of mutual coupling forces in high-frequency loading.
• To reduce the time and cost associated with fatigue testing.

Main Methods:

• Proposed a motion synchronous composite decoupling control strategy.
• Integrated command and feedback signals to compensate for coupling effects.
• Utilized fewer sensors, primarily force sensors, avoiding displacement/velocity/acceleration sensors.

Main Results:

• Successfully suppressed coupling forces and reduced loading errors at higher frequencies.
• Experimentally verified sufficient control accuracy with increased test frequency.
• Demonstrated the capability to significantly shorten experiment duration.

Conclusions:

• The novel control strategy effectively accelerates aircraft fatigue testing.
• This method offers a more economical approach to ensuring flight safety.
• Reduced testing time has significant economic benefits for the aviation industry.