The synthesis of a feedforward unit for H2-optimal decoupling of previewed signals in continuous time-invariant linear systems is considered. The H2-optimal compensator herein presented consists of a finite impulse response system working in connection with a standard finitedimensional dynamic unit. An explicit expression of the compensator transfer function matrix is derived through a simple p...

Using the conformal compensator superfields of N=2 D=4 supergravity, the Type IIB S-duality transformations are expressed as a linear rotation which mixes the compensator and matter superfields. The classical superspace action for D = 4 compactifications of Type IIB supergravity is manifestly invariant under this transformation. Furthermore, the introduction of conformal compensators allows a F...

This paper is concerned with the design of dynamic anti-integrator-windup controllers for critically stable linear systems. The constant gain for anti-windup in the conventional approach is extended to a transfer function. It is also shown that the proposed compensator design is an extension of the Kothare’s linear conditioning for static anti-windup compensator. The effectiveness of the propos...

A Multivariable Control System is designed for an Electromagnetic Bearing and Rotating Shaft System. The Linear Quadratic Gaussian with Loop Transfer Recovery (LQG/LTR) methodology is used to design a robust Model Based Compensator (MBC). The electromagnetic bearing consists of an electromagnetic actuator, operated in magnetic "attractive" force mode, with permanent magnet biased coils. The per...

The paper presents a new complex adaptive non-linear system with one input and one output (SISO) which is based on dynamic inversion. The system consists of a dynamic compensator, an adaptive controller and a reference model. Linear dynamic compensator makes the stabilization command of the linearised system using as input the difference between closed loop system’s output and the reference mod...

A control synthesis theory was proposed by Horowitz [2] to design a ‘three degrees of freedom’ controller for rate and amplitude constrained systems. Following anti-reset windup techniques, a saturation compensation structure was proposed to design compensators for given linear controllers 131. It is shown here that the compensator can be reformulated in terms of the control synthesis theory. C...

In this paper, a nonlinear model for Light Emitting Diodes (LEDs) inspired by semiconductor physics, and corresponding post-compensator are implemented in Field Programmable Gate Array (FPGA) real-time Visible Communications (VLC). Our experiments demonstrate that the LED effectively characterizes dynamic nonlinearity, including memory effects. The output signal of shows good resemblance with m...

This paper investigates the performance of line commutated converter (LCC) based monopolar HVDC transmission system feeding a weak AC network with hybrid reactive power compensators (RPC’s) at the inverter AC side. The hybrid compensator is an equal mix of any two of the following compensators: synchronous compensator (SC); static var compensator (SVC); static synchronous compensator (STATCOM)....

The focus of this thesis is on the study and experimental implementation of a voltage source inverter-based reactive power compensator. A general mathematical model of the system has been developed, fiom which a approximate linearized model is derived. The approximate model introduces a simple means of characterizing the fundamental fiequency behaviour of the compensator. This pennits the chara...

This paper presents a line commutated converter (LCC) based multi-terminal HVDC transmission (MTDC) system feeding very weak AC networks with hybrid reactive power compensators (RPC’s) at the inverter AC side. The hybrid compensator is accomplished by the equal mixing of any two of the following compensators: synchronous compensator (SC); static var compensator (SVC); static synchronous compens...