Journal of System Design and Dynamics 

About: Journal of System Design and Dynamics is an academic journal. The journal publishes majorly in the area(s): Vibration & Control theory. It has an ISSN identifier of 1881-3046. Over the lifetime, 574 publications have been published receiving 3262 citations.

Prospect and Recent Research & Development for Civil Use Autonomous Unmanned Aircraft as UAV and MAV

Abstract: This paper describes the present state of research and development for civil use autonomous unmanned aircraft. In particular, the history of civil use UAVs, the research and development in the world and in Japan, and the subjects and prospects for control and operation systems of civil use autonomous UAVs are described.

Modeling of Electromagnetic Damper for Automobile Suspension

Abstract: In this paper, the modeling of the electromagnetic damper (EMD) for automobile suspension is presented and the validation of the model is demonstrated by comparing the numerical results with the experimental results obtained using shaker tests. EMD is used as an active suspension and controlled to have output force calculated from velocities of sprung and unsprung masses. The formulation of EMD system for active suspensions is first developed, and the validation of the EMD model is demonstrated by experiments of the EMD for automobile suspensions. The validity of the formulation of the EMD developed in this investigation is shown for the frequency responses as well as energy balance for its active use.

Visual Servoing of Quadrotor Micro-Air Vehicle Using Color-Based Tracking Algorithm

Abstract: This paper describes a vision-based tracking system using an autonomous Quadrotor Unmanned Micro-Aerial Vehicle (MAV). The vision-based control system relies on color target detection and tracking algorithm using integral image, Kalman filters for relative pose estimation, and a nonlinear controller for the MAV stabilization and guidance. The vision algorithm relies on information from a single onboard camera. An arbitrary target can be selected in real-time from the ground control station, thereby outperforming template and learning-based approaches. Experimental results obtained from outdoor flight tests, showed that the vision-control system enabled the MAV to track and hover above the target as long as the battery is available. The target does not need to be pre-learned, or a template for detection. The results from image processing are sent to navigate a non-linear controller designed for the MAV by the researchers in our group.

Contact Model for The Pantograph-Catenary Interaction *

Abstract: In the great majority of railway networks the electrical power is provided to the locomotives by the pantograph-catenary system. The single most important feature of this system consists in the quality of the contact between the contact wire(s) of the catenary and the contact strips of the pantograph. The work presented here proposes a new methodology to study the dynamic behavior of the pantograph and of the interaction phenomena in the pantograph-catenary system. The catenary is described by a detailed finite element model while the pantograph is described by a detailed multibody model. The dynamics analysis of each one of these models uses different time integration algorithms: the finite element model of the catenary uses a constant time step Newmark type of integration algorithm while the multibody model uses a variable order and variable time step Gear integration algorithm. The gluing element between the two models is the contact model, it is through the representation of the contact and of the integration schemes applied to the referred models that the needed co-simulation is carried on. The work presented here proposes an integrated methodology to represent the contact between the finite element and multibody models based on a continuous contact force model that takes into account the co-simulation requirements of the integration algorithms used for each subsystem model. The discussion of the benefits and drawbacks of the proposed methodologies and of their accuracy and suitability is supported by the application to the real operation scenario considered and the comparison of the obtained results with experimental test data.

A Review of Nonlinear Dynamics of Mechanical Systems in Year 2008

Abstract: In this article, we provide an overview of a selection of topics of current interest in nonlinear dynamics and vibrations of mechanical systems. Specifically, we cover the traditional topics of structural dynamics, rotating systems, vibration control, vehicle dynamics, and machining, as well as some topics that have emerged more recently, namely micro- and nano-electromechanical systems, piecewise smooth systems, and structural health monitoring and system identification. In the introductory and closing sections, we offer our perspective on the state of affairs in nonlinear dynamics and its utility in the study of mechanical systems.