Application of Servo Control in Flight Simulation Turntable
The aircraft simulation turntable is an important experimental simulation device that is controlled by servo and requires a high-precision control system. It can simulate the flight state and motion of the aircraft, such as pitch, roll and yaw. The aircraft simulation turret is actually a device that converts electrical signals into mechanical motion. However, how to improve the dynamic performance of the aircraft simulation turntable has been a hot topic in this field. China's research on flight simulation turntable began in the middle of the 20th century, mainly in aerospace, weapons, aviation, ship and other related fields. It plays an important role in the development of new products. With the rapid development of computer technology and the wide application of servo technology, it has become possible to implement servo control in high-precision three-axis flight simulation turntable.
In recent years, the international analysis of multi-rate sampling theory has made great progress, and opened up a broad research space for the feedforward control analysis of discrete control systems. H. Fujimoto (Japanese scholar) has proposed a multi-rate sampling system to realize the control scheme of complete tracking of instructions. The core of this control scheme is to describe the controlled object of SISO through the MIMO state equation, thus constructing the state of the controlled object. The transfer function matrix comes. The proposed method has gradually become a research hotspot in this field. At present, the international research on the single-phase inverter, vision-based servo control, permanent magnet synchronous motor harmonic current suppression, AC servo and other related fields has made great progress, and the research on this program in China is only Just getting started.
As the main component of flight simulator and navigation test, the turntable is necessary to improve the accuracy of the turntable in order to make the flight simulator have higher precision. However, there are still many constraints on the research of aircraft turntables, such as the inability to accurately determine the controlled object, the limitations of existing control theory, and external interference factors. But one of the most important factors is the uncertainty of the controlled object. Because the actual application is complicated, and it is impossible to establish a relatively complete modeling theory, it is impossible to accurately establish the mathematical model of the controlled object. When modeling control systems, low-order models are often used instead of high-order models, and linear models are used instead of nonlinear models. Due to uncertain environmental factors, there is often a difference between the controlled object and the established mathematical model. At present, with the continuous development and improvement of the automation control technology, the requirements of the technical parameters such as the accuracy and response frequency of the aircraft simulation turntable in the aviation and aerospace fields are getting higher and higher, which poses new challenges for the manufacturing and control level of the turntable. It also puts higher requirements on the servo control system.
