Variable-Geometry Rotating Components Modeling Based on Reference Characteristic Curves for the Variable Cycle Engine

The variable cycle engine switches working modes by way of changing variable-geometry components to achieve the dual advantages high unit thrust and low specific fuel consumption. Due lack a large amount rig test data complex modeling rotating components, incomplete characteristics lead non-convergence component-level model engine, which makes it difficult design follow-up control system. Aiming at this problem, method for based on reference characteristic curves is proposed in paper. This establishes neural network estimation offset coefficients key component operating points law maturely designed component. Combining be designed, positions positive negative guide vane angles are determined. Instead directly connecting generate lines, paper solves Bezier curve optimization problem sequential quadratic programming (SQP) smoothly fit lines. Thereby, that conform actual can quickly established absence data. simulations show have satisfactory accuracy reliability, further improves operation stability engine.