Method and system for monitoring and displaying engine performance parameters

A method of monitoring and displaying one or more selected performance parameters of an aircraft engine comprising the steps of:

• sensing the value of said one or more selected performance parameters of said aircraft engine under determined operating conditions:
• generating a first set of actual value output signals representative of the actual value of each of said one or more selected performance parameters;
• predicting the value of corresponding performance parameters of an "ideal" functional model of each of said one or more performance parameters of said aircraft engine under said determined operating conditions:
• generating a second set of predicted value output signals representative of the predicted value of each of said one or more of said corresponding performance parameters of said functional model:
• comparing said first and second sets of output signals and generating a third set of difference value output signals represented of the difference in values between said first and second sets of output signals;
• and
• simultaneously displaying the actual value of each of said one or more actual engine performance parameters as represented by said first set of actual output signals and the difference value between each of said one or more actual and corresponding predicted performance parameters as represented by said third set of difference value output signals.

In a system for monitoring and displaying one or more actual performance parameters of a jet aircraft engine under determined operating conditions the improvement comprising:

• first means for generating a first group of a plurality of output signals including a first set of output signals representative of the value of said one or more actual performance parameters of said engine under said determined operating conditions:
• computer means for predicting the value of one or more performance parameters of an "ideal" functional model of said jet aircraft engine using said determined operating conditions, said predicted performance parameters corresponding to said one or more actual performance parameters of said aircraft engine:
• said computer means further including second means for generating a second group of a plurality of output signals including a second set of output signals representative of the value of said one or more predicted performance parameters of said functional models:
• and
• a display panel, including a monitoring indicator display means for simultaneously displaying said one or more output signals in said first set of output signals.

A system for monitoring and displaying the actual, predicted and available thrust of a jet aircraft engine under determined operating conditions comprising

• a first computer means responsive to said determined operating conditions for calculating the actual thrust of said aircraft engine based on said determined conditions and generating an actual thrust output signal representative thereof;
• said computer means including a second computer means responsive to said determined operating conditions for calculating the predicted and available thrust of a functional model of said aircraft engine under said determined operating conditions and generating signals representative of the values of said predicted and available thrusts:
• and
• thrust indicator display means for simultaneously displaying the values of said actual, predicted, and available thrusts.