초록 ▼

A fuzzy logic based fuel flow selection (control) system is presented. Control loops are used to provide desired engine fuel flow control. These loops receive engine operating parameters and provide fuel flow command values in accordance with corresponding transfer functions. These command values ar

A fuzzy logic based fuel flow selection (control) system is presented. Control loops are used to provide desired engine fuel flow control. These loops receive engine operating parameters and provide fuel flow command values in accordance with corresponding transfer functions. These command values are presented to selection logic, which provides a command value based on outputs of the control loops. The command value integrated by a common integrator to provide and integrated command value which is the fuel flow command that is presented to a fuel metering unit at the engine. Each loop has a level of authority assigned to it, which is computed in terms of fuzzy rules and membership functions. Thus at any given moment, more than one loop may be in control to differing levels of authority, whereby the present invention provides a smoother transition between loops competing for control with an attendant increase in system performance.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method of generating a fuel flow request signal for an engine, comprising:generating a plurality of fuel flow control signals from a plurality of control loops;assigning a level of authority to each of said fuel flow control signals based on fuzzy logic;combining each

[ What is claimed is:] [1.]1. A method of generating a fuel flow request signal for an engine, comprising:generating a plurality of fuel flow control signals from a plurality of control loops;assigning a level of authority to each of said fuel flow control signals based on fuzzy logic;combining each of said fuel control signals based on said levels of authority to provide a fuel flow request signal;wherein said fuzzy logic comprises a plurality of rules and membership functions;wherein said rules comprise a lookup table having input and output qualifiers, said input qualifiers being defined by said membership functions; andwherein said membership functions include normalized loop errors.