Design Of The Coordinated Control System For Aircraft Fly-by-wire Control Test-bed

The aircraft fly-by-wire control and loading experiment system in Civil Aviation University of China includes two subsystems: main and auxiliary rudder surface.The Steering gear includes hydraulic and motor drive units.At present,there are two problems in the system.First,the steering gear can provide single-power to drive rudder surface through the hydraulic system or motor system,but has not yet achieved synchronous drive,the output power of the steering gear is insufficient;Second,sending manipulation instructions can only be carried out separately,making the manipulation process complexly and inefficiently.i intend to study the following two aspects:(1)Through the study of control algorithm to achieve the system synchronous;(2)Through the development of interface to improve handling performance.For the first aspect,the speed and position synchronization control strategy of steering gear based on virtual spindle algorithm are proposed.The working principle of the two system are described in detail.the simulation models of the system are built.The influence of the rotational inertia Jm ? the elasticity coefficient Km and the damping coefficient bm of the virtual spindle control parameters are studied in depth.The optimal parameters are selected by simulation and the virtual spindle control system is improved and optimized.then,the simulation model of the speed and position synchronization control system are built.Finally,the fuzzy theory is embedded in the traditional PID controller,and the synchronization control performance of the steering system is further improved.Through the simulation analysis,the results show that the time of speed and position to synchronize are 0.3s and 0.5s,the steering gear synchronization performance is better.For the second aspect,the scope of the deflection angle of the main rudder surface system is extended,the overshoot of the system has been alleviated effectively;The communication module and the control module of the auxiliary rudder surface are studied in depth;Through the development of coordination control interface,the system's handling performance is improved.