Applications of a quadrotor with payload, particularly for chemical spraying, have increased in recent times. The variation payload mass over time causes change the moments inertia (MOI). Moreover, large tilt angles are required fast reference tracking and external disturbance rejection. These variations plant parameters (i.e., inertia) can degrade control scheme’s performance stability. This a...

This article investigates the stabilization problem of a nonlinear networked control system (NCS) exposed to replay attack. A new mathematical model attack is proposed. The resulting closed-loop defined as discrete-time Markovian jump linear (MJLS). Employing Lyapunov–Krasovskii functional, sufficient condition for stochastic stability given in form matrix inequalities (LMIs). law can be obtain...

A high brightness plasma ion source has been developed to address focused ion beam !FIB" applications not satisfied by the liquid metal ion source !LMIS" based FIB. The plasma FIB described here is capable of satisfying applications requiring high mill rates !!100 "m3/s" with non-gallium ions and has demonstrated imaging capabilities with sub100-nm resolution. The virtual source size, angular i...

We develop a simple routine unifying the analysis of several important recently-developed stochastic optimization methods including SAGA, Finito, and stochastic dual coordinate ascent (SDCA). First, we show an intrinsic connection between stochastic optimization methods and dynamic jump systems, and propose a general jump system model for stochastic optimization methods. Our proposed model reco...

Synthesizing a gain-scheduled output feedback H∞ controller via parameter-dependent Lyapunov functions for linear parameter-varying (LPV) plant models involves solving an infinite number of linear matrix inequalities (LMIs). In practice, for affine LPV models, a finite number of LMIs can be achieved using convexifying techniques. This paper proposes an alternative approach to achieve a finite n...

In the polynomial approach to systems control, the static output feedback problem can be formulated as follows: given two polynomial matrices D(s) and N(s), nd a constant matrix K such that polynomial matrix D(s) + KN(s) is stable. In this paper, we show that solving this problem amounts to solving a linear matrix inequality with a non-convex rank constraint. Several numerical experiments illus...

in this paper, a new t-s fuzzy hyperbolic delay model for a class of nonlinear systems with time-varying delay, is presented to address the problems of stability analysis and feedback control. fuzzy controller is designed based on the parallel distributed compensation (pdc), and with a new lyapunov function, delay dependent asymptotic stability conditions of the closed-loop system are derived v...