This　brief　studies　the　problem　of　fault　detection　for　a　class　of　uncertain　state-feedback　tracking　control　systems　with　constant　reference　inputs　and　bounded　disturbances.　The　considered　systems　are　modeled　via　multiple　modes,　namely,　fault-free　case　and　faulty　cases.　Actuator　stuck　faults,　including　outage　cases,　are　considered.　With　the　aid　of　the　finite-frequency　positive-realness　approach,　a　new　linear-matrix-inequality-based　fault　detection　method　for　control　systems　is　obtained　and　applied　to　fault　detection　for　flight　control　systems.　An　F-18　aircraft　model　is　included　in　the　simulation　to　illustrate　the　effectiveness　of　the　proposed　method.