A separation principle for dynamic positioning of ships: theoretical and experimental results

Passivity-based control applied to the dynamic positioning of ships

A family of passivity-based controllers for dynamic positioning of ships is presented. The authors exploit the idea of shaping the energy function of the closed-loop system to obtain different formulations of the passivity-based control law using the interconnection and damping assignment-passivity-based control (IDA-PBC) methodology. A salient feature of this study is that the proposed control...

Second Generation IMO Intact Stability Vulnerability Criteria and its Application to ships Navigating in Persian Gulf and Oman Sea

Second generation intact stability criteria for few past years had been under development by International Maritime Organization (IMO). Since the draft proposed amendments shall be amended to International code on Intact Stability (IS code 2008), new regulations shall enter into force for ships of length more than 24 meter. Generally second generation intact stability criteria (SGISC) refers to...

Sensitivity Analysis of Road Actual Conditions to Evaluate the Optimal Positioning of Geogrid Using Finite Elements and Dynamic Methods

Roads are subjected to vehicle traffics with different loads and velocities. Geogrid reinforcement is of the best methods for road improvement due to the ease of construction, delay in damage development and financial efficiency. This study evaluates pavement response under different loads and velocities, before and after geogrid reinforcement. A finite element software (ABAQUS) is used for num...

The Effectiveness of Empathic Dynamic Psychotherapy and Anxiety-Regulating Psychodynamic Therapy in Treating Adult Separation Anxiety Disorder

Objective: Dynamic psychotherapies are effective in treating anxiety disorders. However, little is known about their effectiveness in treating Adult Separation Anxiety Disorder (ASAD). The present research aimed to examine the effectiveness of Brief Empathic Psychotherapy (BEP) and anxiety-regulating dynamic therapy or Affect Phobia Therapy (APT) in reducing depression and anxiety in a sample o...

Output Feedback Passivity Based Controllers for Dynamic Positioning of Ships