The Precise Control Research Of Shipboard Fresnel Lens Optical Landing System

Fresnel Lens Optical Landing System (FLOLS) is equipped on the deck of the aircraft carrier,and shot a light with a certain angle toward the direction of carrier-based aircraft landing way to guidethe aircraft landing safely. But because of various uncertainties interference on the sea, it is difficult tomake the system work stably, so the research on how to accurately control the system is veryimportant, and this paper mainly researches for the precise control of FLOLS.First of all, this paper defines the corresponding coordinates according to the characteristics ofthe system, then establishes the mathematical model according to the structure and executive structure,and also analyzes some problems that may arise in the process of control, gives the solution.Then according to the mathematical model established above, firstly, paper gives the speednegative feedback double-loop control, which constitutes the double closed-loop stability controlmethod for the speed loop and position loop, to isolate the external interference. But due to the delayinterference inside, further, it puts forward the internal model control to offset the effect of time delay.In order to improve control accuracy, we also need to consider the interference effect of frictionfactors, so compensate the friction with a friction-based model of the motor execution inside platformby RBF neural sliding mode control. Through the compensation the system can be simplified into asecond-order system, thus this paper proposes a friction compensation strategy based on thedouble-model adaptive control, and well completion of friction compensation control.To the controller design, the hardware and software upgrades are easy to maintain with amodular design concept, which completed a critical signal conditioning, servo drive circuit design andthe software control logic design work.