Finally,the constructed pseudo-linear system is synthesized by pole assignment method and a VSC-HVDC controller is designed,and the important implicit dynamic problem in feedback linearization is researched to ensure the stability of the control system.

Constructive control Lyapunov functions for affine nonlinear systems with zero dynamics;

Symmetries of zero dynamics of nonlinear systems;

When there are common Lyapunov functions found in both the linear parts and zero dynamics of the nominal systems,the robust stability of the systems available to arbitrary switching can be obtained by way of constructing a common Lyapunov function relying on uncertain parameters.

Since the transfer functions between the control fin deflection and overload ot Tail-controlled Skid-to-Turn missiles are of nonminimum phase,zero dynamics is unstable.

The excitation system controller was designed to stabilize terminal voltage via zero dynamic theory,while steam-valving controller was designed to enhance angle stability via variable structure control.

As a novel nonlinear control method,over-load control has quickly developed in the field of missile control law design in the recent years,but during the design of the skid-to-turn(STT) supersonic cruise missile pitch channel control system based on over-load control,the system exits non-minimum phase phenomena between over-load output and rudder input,that causes zero dynamic unstable.

After an on-site investigation and subsequent analysis of a derailling incident of a bridge type reclaimer, a sychrocontrol method based on dynamic zero resetting was proposed as the solution; the pertaining control system was designed and the relevant functional tests performed.

the acquirement of the data related to product becomes more and more easily,which provides essential condition for the implementation of dynamic retail.