Several problems on control of modern aerocraft

This paper addresses several key problems on control of modern aerocrafts. After a short introduction, the paper mainly discusses (i) Various physical constraints on modern aerocrafts, including the problems caused by the relative motion of different coordinate systems, unilateral physical constraints and nonholonomic constraints on aerocrafts; (ii) Dynamic control allocation of heterogeneous actuators and state reconstruction based on multi-sensor information fusion; (iii) Various interconnections in the motion of modern aerocrafts, including the coupling in different flight channels, the coupling in the attitude and trajectory and the interactions between elastic and rigid effects, etc.; (iv) Trade-off among different objectives, Strong nonlinearities and time-variation problems in modern aircrafts. Finally, it is pointed out that the settlement of these problems and the consideration from the practical requirements of aircrafts are important not only for control of aerocrafts but also for the development of control science.