Tkachev

pp. 264-278

pp. 1-17

The problem of analytical reservation of measuring systems of an aircraft is solved with the use of state observers. The problem of tracking a program trajectory which implements landing maneuvers (approach and round-out) is solved by using estimates obtained by state observers. Aircraft movement in vertical plane was considered. It was assumed that the aircraft is exposed to limited unknown external disturbances. As a system of analytical reservation of board instruments, cascade system of state observers working on the sliding mode was proposed. This system allowed to estimate both some of the variables of the state vector and external disturbances acting on the aircraft. Simulation results were presented in the article.

For nonlinear dynamical systems with scalar control the equilibrium point stabilization problem is considered using a transformation of the system in a regular quasicanonical form.  Affine systems are investigated which can be transformed to quasicanonical form with  transformability index greater then two.   Zero dynamics of the system are not asymptotically stable.  The virtual outputs method of stabilizing  feedback design is propagated on the above mentioned systems.