Application and analysis of ADRC in guidance and control in flight vehicle—Some explorations in various time-scale paradigms

This paper summarizes some ADRC´s applications in flight vehicle´s guidance, control and servo-system, including thrust control with large lag constant, drag acceleration control for slider´s guidance, flight control and motor based servo-control. Some advantages and disadvantages of ADRC in respective circumstances are discussed. Linear ADRC (LADRC) is applicable to systems with closed-loop frequency bandwidth being less than 1Hz, and it would improve dynamic performance significantly and expand stability boundary from theoretical analysis. In contrary, it is difficult to apply LADRC to motor based servo-system with high closed-loop bandwidth and strong nonlinear characteristics such as deadzone effect induced by friction. In this circumstance, nonlinear PI control has some advantages.