摘要
现代飞行训练模拟器必须是具备高动态响应的长行程的六自由度运动系统。以Stewart六自由度运动平台所形成的飞行训练模拟器的电液伺服系统是用电液伺服阀控制的即为阀控系统,功率损失很大,效率很低,系统中产生的热量需要很大的冷却装置,这又需要浪费附加功率。介绍了一种新型高效电动静压飞行模拟器运动系统,该飞行模拟器的电液伺服系统中不用电液伺服阀,而是采用交流伺服电动机直接驱动定量泵的泵控系统。交流伺服电动机按外部指令信号可实现变向、变速、变转矩的伺服驱动;同时,在系统上采用蓄能器可以实现能量回收和保压。在2008年交付使用的波音787飞行训练模拟器采用了该高效电动静压运动系统。
Modern flight training simulators must be equipped with long stroke six degree-of-freedom motion systems that have high dynamic response velocity. The electro hydraulic servo-controlled system of the simulators built on six degree-of-freedom Stewart platform adopt the valve control system, the valve-controlled actuators have low effciency and large power consumption, and it needs a substantial cooling system to remove waste energy （heat） from the hydraulic oil. A novel high efficiency electro-hydrostatic flight simulator motion system was introduced, which uses AC servo motor to drive the pump control system of fixed displacement pump. According to the external signal, AC servo motor can realize servo drive of variable direction, speed and torque. Accumulators were used in the system to store and recycle high pressure oil when actuators retract. The novel system was used in the Boeing 787 simulators delivered in 2008.
出处
《机床与液压》
北大核心
2010年第2期43-45,共3页
Machine Tool & Hydraulics
关键词
飞行模拟器
电液伺服阀
交流伺服电动机
阀控系统
泵控系统
Flight simulators
Electro-hydraulic servo valve
AC servo motor
Valve control system
Pump control system
