双三轴仿真转台同步控制系统研究

双三轴仿真转台的同步控制和动态特性指标关系到导航与制导系统的优劣。针对双转台之间的时钟同步问题,提出基于IEEE1588时钟同步协议和光纤反射内存网的时钟同步方法,通过时间服务器接收GPS或北斗时钟时间信号输出1 ms方波,进一步通过光纤反射内存网络进行时钟脉冲分发实现不同系统之间的时钟同步。针对原本双转台动态同步控制需要手动精调同步参数且容易出现超调现象的不足,提出一种基于参考模型自适应的同步控制方法,以其中一台性能较好的转台作为参考模型,另一台性能较差的转台通过自适应算法进行跟踪控制,从而实现双转台之间的同步控制。通过仿真验证和实验验证,证明该算法稳定可靠,易于实现,可以有效地提高双转台之间的动态同步特性。

Synchronous Control System of Double Three-Axis Simulation Turntable

The synchronous control and dynamic characteristic index of dual three-axis simulation turntable related to the advantages and disadvantages of the navigation and guidance system.In order to solve the problem of clock synchronization between two turntables,a clock synchronization method based on IEEE1588 clock synchronization protocol and optical fiber reflective memory network is proposed.The time server receives GPS or BeiDou clock time signal and outputs 1 ms square wave.Further,the clock pulse is distributed through optical fiber reflective memory network to achieve clock synchronization between different systems.In view of the fact that the original dynamic synchronous control of dual turntables requires manual fine adjustment of synchronous parameters and is prone to overshoot,a synchronous control method based on reference model adaptation is proposed.One turntable with good performance is used as the reference model,and the other turntable with poor performance is tracked and controlled through adaptive algorithm,so as to realize the synchronization control between dual turntables.Through simulation and experimental verification,it is proved that the algorithm is stable,reliable and easy to implement,and can effectively improve the dynamic synchronization characteristics between two turntables.