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模拟转台是飞行器物理仿真实验中的主要仿真设备。随着飞行器性能的不断提高,对于模拟转台诸如:快速性、动态精度等性能指标提出了愈来愈高的要求,而在转台拖动系统设计中,一般延用的经典调节原理的设计方法不易得到一个十分理想的拖动系统。本文对于磁粉离合作为拖动部件的模拟转台提出了一种采用现代控制理论的方法,设计拖动系统的方案,首先建立被控对象的转台的状态方程模型,由于要求拖动系统能使转台运动跟踪给定的动态模型,所以是一个典型的跟踪问题。在此采用增广系统的方法,将状态跟踪问题转化为状态调节问题,然后在稳态二次型指标下进行优化设计,给出系统中的各个返馈与前馈系数,同时提出一种根据系统精度要求而确定二次型指标中的权系数的方法。从初步的系统数学仿真结果看:在快速性及跟踪精度方面都有很大的提高。
Simulated turntable is the main simulation device in the physics experiment of aircraft. With the continuous improvement of aircraft performance, higher and higher requirements have been put forward for the performance of analog turntable such as fastness and dynamic precision. In the design of turntable drag system, the design method of classical adjusting principle which is generally used is not easy Get a very good drag system. In this paper, a method of modern control theory is proposed to simulate turntable with magnetic particle clutch as a dragging component. The scheme of dragging system is designed. Firstly, the state equation model of turntable of controlled object is established. Tracking a given dynamic model is therefore a classic tracking issue. In this paper, an augmented system approach is used to transform the state tracking problem into a state adjustment problem. Then the optimal design is performed under the steady state quadratic index, and the feedback and feedforward coefficients in the system are given. At the same time, System accuracy requirements to determine the quadratic index weighting method. From the initial system mathematical simulation results: the rapidity and tracking accuracy have greatly improved.