There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

There is an increasing demand for dynamic systems to become safer and more reliable This requirement extends beyond the normally accepted safety-critical systems such as nuclear reactors and aircraft, where safety is of paramount importance, to systems such as autonomous vehicles and process control systems where the system availability is vital It is clear that fault diagnosis is becoming an important subject in modern control theory and practice Robust Model-Based Fault Diagnosis for Dynamic Systems presents the subject of model-based fault diagnosis in a unified framework It contains many important topics and methods; however, total coverage and completeness is not the primary concern The book focuses on fundamental issues such as basic definitions, residual generation methods and the importance of robustness in model-based fault diagnosis approaches In this book, fault diagnosis concepts and methods are illustrated by either simple academic examples or practical applications The first two chapters are of tutorial value and provide a starting point for newcomers to this field The rest of the book presents the state of the art in model-based fault diagnosis by discussing many important robust approaches and their applications This will certainly appeal to experts in this field Robust Model-Based Fault Diagnosis for Dynamic Systems targets both newcomers who want to get into this subject, and experts who are concerned with fundamental issues and are also looking for inspiration for future research The book is useful for both researchers in academia and professional engineers in industry because both theory and applications are discussed Although this is a research monograph, it will be an important text for postgraduate research students world-wide The largest market, however, will be academics, libraries and practicing engineers and scientists throughout the world

Robust Model-Based Fault Diagnosis for Dynamic Systems

비만아 부모의 돌봄 경험: q 방법론

The purpose of this paper is to provide a comprehensive presentation and interpretation of the Ensemble Kalman Filter (EnKF) and its numerical implementation. The EnKF has a large user group, and numerous publications have discussed applications and theoretical aspects of it. This paper reviews the important results from these studies and also presents new ideas and alternative interpretations which further explain the success of the EnKF. In addition to providing the theoretical framework needed for using the EnKF, there is also a focus on the algorithmic formulation and optimal numerical implementation. A program listing is given for some of the key subroutines. The paper also touches upon specific issues such as the use of nonlinear measurements, in situ profiles of temperature and salinity, and data which are available with high frequency in time. An ensemble based optimal interpolation (EnOI) scheme is presented as a cost-effective approach which may serve as an alternative to the EnKF in some applications. A fairly extensive discussion is devoted to the use of time correlated model errors and the estimation of model bias.

The Ensemble Kalman Filter: Theoretical formulation and practical implementation

A new control strategy is presented for a VTOL aerial robot with four rotors. A kinematics control law is first derived using Astolfipsilas discontinuous control, after introducing a chained form transformation with one generator and three chains to the original model. This was motivated by the fact that the discontinuous kinematic-model without using a chained form transformation assures only a local stability of the kinematic based control system, instead of guaranteeing a global stability of the control system. Finally, a computer simulation is given to demonstrate the effectiveness of our approach.

A discontinuous control of VTOL aerial robots with four rotors through a chained form transformation

In this chapter, a CAM system for an articulated-type industrial robot RV1A is proposed in order to raise the relationship between a CAD/CAM and industrial robots spread to industrial manufacturing fields. A simple and flexible CAM system is designed from the viewpoint of the cooperation between CL data and robotic servo system. The CAM system required for an industrial robot is realized as an integrated system including not only a conventional main-processor of CAM but also a robotic servo system and kinematics, so that the RV1A can be directly controlled without any conventional teaching process. The basic design of the CAM system and experimental results are shown using the industrial robot RV1A. The effectiveness is demonstrated through a trajectory following a control experiment along multi-axis CL data consisting of position and orientation components and passive force control experiments.

CAM system for articulated-type industrial robot

Although point cloud data (PCD) are easily measured using a RGB-Depth sensor such as Kinect and Xtion, measured PCD have undesirable noise and fluctuation of values. In this paper, a curved surface fitting method using a raster-scanning window is proposed to smooth original organized PCD with noise. The method allows PCD to be fitted to numerous small quadratic curved surfaces and to be smoothed while keeping its own shape feature. The effectiveness and usefulness of the proposed system are demonstrated through actual smoothing experiments.

Curved surface fitting using a raster-scanning window for smoothing PCD

We describe a coordinative motion control based on the master/slave method for different kinds of manipulators. The master side consists of a pantagraph-type two link manipulator driven by a torque command, whereas the slave side is an industrial manipulator driven by a position command with a force/torque sensor. It is difficult to maintain a desired contact force by only a master/slave method. To maintain a desired contact force, a compensative position command is generated by using fuzzy reasoning with the force sensor information. The effectiveness is verified by experiments.

Coordinative motion control for different kind of manipulators using a fuzzy compensator

Tasks important for a mobile robot are the environmental recognition and the obstacle avoidance in the real world. The legged robot can be adapted for rough terrains. It is because the legged robot has a high degree of freedom in order to avoid an obstacle to three dimensions. In this paper, we propose a locomotion strategy on the terrain with stiffness which is different in each. The propriety of a continuation walk is determined by the force sensor mounted to the bottom of each leg of a quadruped robot. The effectiveness of the proposal approach is verified from the result of the experiment which uses the prevalent quadruped robot called TITAN-VIII.

Keigo Watanabe

Papers

A discontinuous control of VTOL aerial robots with four rotors through a chained form transformation

CAM system for articulated-type industrial robot

Curved surface fitting using a raster-scanning window for smoothing PCD

Coordinative motion control for different kind of manipulators using a fuzzy compensator

Navigation strategy for a quadruped robot on soft flat ground