Model based IVHM system for the solid rocket booster

TL;DR

This paper presents a model-based hybrid probabilistic on-board IVHM system for solid rocket boosters, capable of handling nonlinear regimes and abrupt parameter changes, demonstrated through high-fidelity simulations of a case breach fault.

Contribution

It introduces a novel hybrid probabilistic approach for IVHM in SRBs that manages abrupt model parameter changes during nonlinear off-nominal regimes.

Findings

High-fidelity FLUENT model aligns with analytical solutions.

The approach effectively detects and characterizes fault scenarios.

Simulations validate the system's robustness in fault conditions.

Abstract

We report progress in the development of a model-based hybrid probabilistic approach to an on-board IVHM for solid rocket boosters (SRBs) that can accommodate the abrupt changes of the model parameters in various nonlinear dynamical off-nominal regimes. The work is related to the ORION mission program. Specifically, a case breach fault for SRBs is considered that takes into account burning a hole through the rocket case, as well as ablation of the nozzle throat under the action of hot gas flow. A high-fidelity model (HFM) of the fault is developed in FLUENT in cylindrical symmetry. The results of the FLUENT simulations are shown to be in good agreement with quasi-stationary approximation and analytical solution of a system of one-dimensional partial differential equations (PDEs) for the gas flow in the combustion chamber and in the hole through the rocket case.