Time-varying linear control for tiltrotor aircraft

Repetitive Control for Linear Time Varying Systems

Repetitive control that asymptotically tracks or rejects periodic signals has been widely used in many applications. For linear time invariant system, this problem has been thoroughly studied and solved. This paper presents the analysis and synthesis of repetitive control algorithms to track or reject periodic signals for linear time varying systems. Both continuous and discrete time domain res...

Contributions to time-varying Linear Control Systems

Adaptive control of linear time-varying plants

In this paper the model reference adaptive control (MRAC) problem of a class of linear time-varying (LTV) plants is considered. The plant parameters are assumed to be smooth, bounded functions of time which satisfy the usual assumptions of MRAC for timeinvariant plants, at each frozen time instant. It is first shown that if the plant parameters are sufficiently slowly varying with time, a contr...

Adaptive model predictive control for constrained, linear time varying systems

We consider a discrete-time, linear time varying (LTV), multiple input, multiple output (MIMO) system with nu inputs and ny outputs. The system is known to be asymptotically stable, but the exact dynamics and the way they change over time are not known. We denote the vector of control inputs at time step t ∈ Z by u(t) = [u1(t), . . . , unu(t)] T , where ui(t) ∈ R, i = 1, . . . , nu are the indi...

Development of Linear Parameter Varying Models for Aircraft

This paper presents a comparative study of three Linear Parameter Varying (LPV) modeling approaches and their application to the longitudinal motion of a Boeing 747 series 100/200. The three approaches used to obtain the quasi-LPV models are Jacobian linearisation, state transformation, and function substitution. Development of linear parameter varying models are a key step in applying LPV cont...