|
| Number | Project | Function | Failure
mode | Failure
cause | Failure
impact |
|
| 1 | Radar
data | The basis of generating radar track | Radar track position is not accurate | Radar precision is insufficient | Radar track position causes the deviation |
| Air complex environment causes interference |
| SSR code error | Radar signal interference that can lead to inaccurate SSR code | Wrong correlation |
| The repeated SSR code | Double SSR code appears to be caused by mountain reflection, radar fault, false target, fusion algorithm, and so on | Unable to correlate with each other |
| The radar flight number error of ADS or S model | ADS data or S mode’s radar data transmission and processing is wrong | Wrong correlation |
|
| 2 | Flight
telegraph | The basis of the flight plan | Poor timeliness of flight telegraph | Manually send flight telegraph delay | ATC system did not receive the message within prescribed time. Time deviation is too large, autorelated error, or wrong correlation |
| Network communication link quality is poor |
| The sequential variation of flight telegraph | Network communication link quality is poor | The receiving and dispatched flight telegraph do not match the time order |
| The format and content of flight telegraph are not accurate | Human error | The format and content of flight telegraph are wrong. Unable to get the correct route and calculate the flight status. Unable to automatically correlate with each other |
| Network communication link quality is poor |
| Lost the flight telegraph | Network communication link quality is poor | Unable to get flight telegraph. Unable to get accurate route and calculate the flight status. Unable to automatically correlate with each other |
|
| 3 | Basic data | Provide the information of airport, airlines, aircraft, beacon, and punctuation | Basic data is not accurate | Basic database did not update the information of routes and beacon adjusted | Unable to establish accurate flight route. Unable to calculate accurate 4D track. Autorelated error or wrong correlation |
| Basic data is not complete | Not existing |
| Code duplication |
|
| 4 | 4D
track
prediction | Establish the precise 4D track model of whole flight process | The calculated time deviation that through each way point is too large | 4D track prediction algorithm is not accurate | State of the flight plan is not correct. The deviation between the planned track position and real target position is large. Unable to automatically correlate with each other or wrong correlation |
| The calculated planned flight direction is far away from the actual direction | 4D track prediction algorithm is not accurate | Unable to automatically correlate with each other or wrong correlation |
|
