Establishing　a　precise　intake　pressure　environment　in　the　aeropropulsion　systems　test　facility　(ASTF)　is　critical　for　evaluating　aeroengines＇　flight　characteristics.　The　model-partial　and　robust　active　disturbance　rejection　control　(ADRC),　that　is　extended　state　observer　(ESO)-based　controller,　has　become　a　favorable　solution　to　the　complex　intake　pressure　control　system.　The　parameter　b0,　as　the　estimated　value　of　the　closed-loop　system　control　gain　b　under　the　ADRC　paradigm,　significantly　influences　ADRC　performances,　evidenced　by　extensive　flight　tests.　In　this　work,　an　enhanced　ADRC　with　an　adaptive　parameter　b0　is　proposed　to　improve　the　control　quality　of　the　intake　pressure.　In　particular,　the　simplified　model　of　b　is　utilized　to　dynamically　adjust　b0.　Meanwhile,　the　differential　signals　obtained　from　a　tracking　differentiator　(TD)　are　applied　to　further　improve　the　responsiveness　of　b0.　The　stable　region　of　b0　is　theoretically　analyzed　by　using　the　time　delay　estimation　technique,　and　the　quantitative　relationship　between　b0　and　disturbance　observation　ability　of　ESO　is　given.　Experimental　results　demonstrate　that　the　proposed　controller　can　effectively　suppress　the　valve　swing　amplitude　in　steady　state　and　reduce　the　maximum　pressure　error　in　transitional　state,　with　improvement　rates　of　50%　and　62%,　respectively.