Abstract
This paper deals with the problem that the signals of the force sensor of an aircraft's electric braking system are superimposed with high-amplitude interference. The analysis of the electric braking system shows that the three-phase current of its motor and the pulse width modulation (PWM) wave output by the electro-mechanical actuator controller (EMAC) are the primary sources of interference and that the coupling interference between cable lines is the main cause of the interference of signals of the force sensor. The mathematical model of coupling interference between cable lines is established, according to which the transmission cable is designed and the line coupling was reduced by using electromagnetic shielding, line twisting and effective grounding. A passive electromagnetic interference (EMI) filter is designed for the output end of the EMAC. Through these improvements, the interference superimposed on the force sensor is greatly reduced. The paper also improves the electromagnetic compatibility of the electric braking system and ensures that the braking force servo system works normally.
| Original language | English |
|---|---|
| Pages (from-to) | 994-1000 |
| Number of pages | 7 |
| Journal | Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University |
| Volume | 33 |
| Issue number | 6 |
| Publication status | Published - 1 Dec 2015 |
| Externally published | Yes |
Keywords
- Aircraft
- Braking
- Brushless DC motors
- Design
- Design of experiments
- EMI filter
- Efficiency
- Electric braking system
- Electromagnetic interference (EMI)
- Electromagnetic shielding
- Fast Fourier transforms
- Interference suppression
- Mathematical models
- Pulse width modulation
- Schematic diagrams
- Sensors
- Topology
- Transmission cable