The　flight　environment　simulation　system　plays　a　crucial　role　in　aeroengine　testing,　replicating　real　mission　pressure　and　temperature　conditions.　However,　existing　systems　face　challenges　in　handling　strong　measurement　noises　and　total　disturbances　during　transient　tests,　leading　to　inaccurate　simulations　and　potential　actuator　damage.　To　address　these　gaps,　an　enhanced　tracking　differentiator　based　active　disturbance　rejection　control　scheme　is　proposed　and　implemented.　Our　method　introduces　two　key　innovations:　a　discrete-time　optimal　control　law　that　dynamically　adjusts　control　inputs　based　on　state　transition　and　sampling　times,　and　a　phase-advancing　method　that　mitigates　filtering　phase　delays　by　incorporating　derivative　signals　to　predict　input　trends.　These　components　are　integrated　into　a　novel　tracking　differentiator,　enhancing　the　estimation　capability　of　the　extended　state　observer　in　active　disturbance　rejection　control.　Frequency-domain　analysis　demonstrates　the　proposed　tracking　differentiator＇s　superior　filtering　performance　and　phase　quality.　Simulations　of　intake　environment　pressure　during　aeroengine　transient　tests　reveal　that,　compared　to　traditional　tracking　differentiator-based　active　disturbance　rejection　control,　the　proposed　approach　significantly　reduces　both　control　signal　oscillations　and　setpoint　deviations　by　75.44%　and　53.9%,　respectively.　These　improvements　effectively　address　environment　simulation　deviations　and　unnecessary　actuator　wear,　thereby　enhancing　the　accuracy　and　reliability　of　aeroengine　testing.　©　2024　Elsevier　Masson　SAS