This paper presents the continuation of a project first presented at MIPRO'10 conference. The project includes a small-scale marine platform (PlaDyPos) developed at the Laboratory for Underwater Systems and Technologies (LABUST), University of Zagreb which is used for testing control and guidance algorithms for marine vehicles. The paper focuses on the analysis of experimental results obtained ...

Most fault adaptive control research addresses the preservation of system stability or functionality in the presence of a specific failure (fault). This paper examines the fault adaptive control problem for a generic class of incipient failure modes, which do not initially affect system stability, but will eventually cause a catastrophic failure to occur. This risk of catastrophic failure due a...

The condition of mechatronic production equipment slowly deteriorates over time, increasing the risk failure and associated unscheduled downtime. A key indicator for an increased failures is shifting resonances. aim this paper to track resonances online during normal operation. This contributes real-time parametric fault diagnosis by applying comparing parameter estimators in new context, highl...

In this article, the issue of attitude control and active vibration suppression of a nonlinear flexible spacecraft is assessed through piezoelectric patches as actuator and sensors. Two controller loops are applied: the inner loop, to make the panel vibration damped through piezoelectric patches; and the outer loop, to perform spacecraft maneuver using the reaction wheel acting on the hub. An o...

Air-bearing-based spacecraft simulators are widely used to develop and verify spacecraft control techniques required by modern spacecraft applications. To create a spacelike environment with ground spacecraft simulators, the effects of gravity should be minimized. For a spherical air-bearing system with 3 rotational degrees of freedom, the center of rotation of the spacecraft simulator should b...

1. ABSTRACT As a result of the interaction between the spacecraft and its operational environment, the constituent materials begin to change. These changes are determined by a combination of energy deposition, the resulting chemical reactions, and contamination. These changes negatively impact the ability of spacecraft operators to predict the behavior of a spacecraft as it ages. For example, i...

-The attitude stabilization problem of a rigid spacecraft using control torques supplied by gas jet actuators about only two of its principal axes is considered. If the uncontrolled principal axis of the spacecraft is not an axis of symmetry, then the complete spacecraft dynamics are small time locally controllable. However, the spacecraft cannot be asymptotically stabilized to any equilibrium ...

In this paper the attitude tracking problem is solved for a flexible spacecraft in the case of measurements of the variables describing the attitude error. Such a control could be applied in failure situations for recovering a spacecraft, so increasing the fault tolerance of the spacecraft control system and the success of the mission. The result is a dynamic controller capable of reconstructin...