Robust frequency design of linear stationary systems in aeroautoelastics

Robust frequency design of linear closed-loop stationary aeroelastic systems (LCLSAES) is considered with the help of doubly coprime fractional representations, linear affine manifolds, and the matrix Corona problem as well as with or without the help of the separation principle. The numerical algorithm is produced by using the finite Lagrange-Sylvester interpolation formulas. An example is given.     

Principle of feedback with additive system disturbances and some compensator schemes

The most complete form of control systems corresponding the principle of duality is given. Established is a new principle of feedback with additive system disturbances which permits to put in practice the optimal system variables in the case when they cannot be realized by using the feedback principle. Some other schemes of closed-loop systems are studied and generalized. The corresponding examples are given.