Equilibrium stability analysis by numerical simulations for a linear system with time-delayed control
Journal Title: INCAS BULLETIN - Year 2019, Vol 11, Issue 2
Abstract
The work starts from the linearization of a nonlinear mathematical model of the electrohydraulic servomechanism with structural switching and delayed control. The delay, as well as the switching structure, can lead to instability and to the deterioration of the dynamic system performance. Between the different approaches to the delay problem, this article considers the predictive feedback method. The question of switching structure is herein treated empirically, aiming in the numerical simulation not to impose on the system a magnitude of the disturbance of the zero equilibrium that leads to switching by changing the sign of the state variable which is the displacement of the servovalve spool. Numerical simulations allow to highlight a critical delay, which is attested by comparison to an analytical method.
Authors and Affiliations
George TECUCEANU, Daniela ENCIU, Ioan URSU
Keywords
Related Articles
- EP ID EP585304
- DOI 10.13111/2066-8201.2019.11.2.15
- Views 100
- Downloads 0
Optimizing ideal ion propulsion systems depending on the nature of the propellant
From all accounts the ion thrusters are characterized by the fact that they produce a very high exhaust velocity and specific impulse, sometimes too high for many missions. The exhaust velocity of the ionized particles i...
The behavior of multilayer ceramic protections at quick thermal shock
Protective layers of “hot parts” of the turbo engines as well as co-generative systems of energy industry are exposed to a combination of wear factors which may act together at high values. The main goal of the paper is...
[b]Design of a compact six-component force and moment sensor for aerodynamic testing[/b]
The measurement of steady and fluctuating forces acting on a body in a flow is one of the main tasks in wind-tunnel experiments. Usually, a multi-component strain gauge force and moment sensor (also known as balance) is...
A review of orbital space robots on its technical aspects
An automated shuttle is an unmanned robotics system, generally under telerobotic control. A mechanical robotic system intended to make logical conclusions is regularly called a space probe. Many space missions are more f...
On the use of infrared thermography as NDT of aerospace materials
Aeronautical structures are manufactured in a large range of materials like metallic, plastic or omposite. The maintenance of aerospace structures consists in conventional inspections using different Non-Destructive Eval...