6 papers
Efficient Stabilization of Hybrid Coulomb Spacecraft Formations using Control Lyapunov Functions
Adam M Tahir
A control allocation algorithm using control Lyapunov functions to determine stabilizing charges and thrusts of hybrid Coulomb spacecraft formations (HCSFs) is presented. The goal…
Model Predictive Control of Collinear Coulomb Spacecraft Formations
Adam M Tahir
A model predictive control scheme to stabilize desired configurations of collinear Coulomb spacecraft formations is derived in this paper. The nonlinearities of the dynamics with r…
On the mixed monotonicity of polynomial functions
Adam M Tahir
In this paper, it is shown that every polynomial function is mixed monotone globally with a polynomial decomposition function. For univariate polynomials, the decomposition functio…
Control Allocation for Hybrid Coulomb Spacecraft Formations
Adam M Tahir
This paper proposes an algorithm which can be used in hybrid Coulomb spacecraft formations to minimize propellant by maximizing the amount of force that is generated by Coulomb for…
Synthesis of Interval Observers for Nonlinear Discrete-Time Systems
Adam M Tahir, Behcet Acikmese
A systematic procedure to synthesize interval observers for nonlinear discrete-time systems is proposed. The feedback gains and other matrices are found from the solutions to semid…
Periodic Event-triggered Control for Incrementally Quadratic Nonlinear Systems
Xiangru Xu, Adam M. Tahir, Behcet Acikmese
Periodic event-triggered control (PETC) evaluates the triggering rule periodically and is well-suited for implementation on digital platforms. This paper investigates PETC design f…