Electro-hydraulic load simulator control system design
|School||Nanjing University of Aeronautics and Astronautics|
|Course||Control Theory and Control Engineering|
|Keywords||Electro-hydraulic load simulator Excess torque Structural invariance PID control Information fusion control|
Electro-hydraulic load simulator is simulated aircraft during flight steering suffered its aerodynamic moment loads semi-physical simulation equipment, its function is to reproduce in laboratory conditions, the aircraft during the flight control surface under load conditions , thereby detected steering system performance for aircraft steering system provides reliable experimental data . It 's self- destruction of the traditional full physical experiments under laboratory conditions into the semi-physical prediction experiments , reaching shorten the development cycle , saving development costs , improve reliability and success rate purposes. Therefore, it is for national defense and military industry is of great significance . Electro-hydraulic load simulator is a typical passive simulation equipment, steering system as active movement , seriously interfere with the simulation load torque loading system , resulting in a large excess torque . Such interference with strength , with the steering characteristics of continuous change at different speeds , it exists a serious impact on the dynamic performance of the load simulator . Therefore, the electro-hydraulic load simulator key technical issue is how to suppress and eliminate extraneous torque . Paper illustrates the electro-hydraulic load simulator key technical issues , evaluation of technical indicators , the basic working principle, according to a research institute of the technical indicators designed a single-channel electro-hydraulic load simulator specific control scheme. Load simulator system was established precise mathematical model to analyze the mechanism and the extra torque characteristics analyzed by simulation parameters on the system performance and the impact of the extra torque , so as to improve system performance and suppressing extraneous torque provides a theoretical basis . On this basis , we propose a new electro-hydraulic load simulator control strategy, which is based on information fusion control theory foreseeable tracking control with traditional PID control and structure of compensation compared to control , information fusion control can increase system accuracy and eliminate extraneous torque and verified by simulation the effectiveness of the control strategy .