Hi Dongqiang,
At first sight, your code seems OK. So I'm guessing here...
- When reviewing your code in debug, are you sure the 'this.aFilters' array is correctly filled in with sap.ui.model.Filter objects?
- I'm also not sure what you are trying to achieve with the navigation property of the parameters map... Maybe try to comment/delete this and try again?
Good luck!
Best regards,
Maarten