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This paper investigates vibration suppression of a building model employing inerter. The inerter is a two-terminal mechanical device that substitutes the mass element in the mechanical networks. The inerter has been applied to many systems, including vehicle suspensions, train hunting dynamics, and optical tables. This paper applies the inerter to buildings for repressing earthquake vibration. In...
This study presents a stability margin (SM) analysis of a pulse-width modulation (PWM) push-pull dc-dc converter that involves applying the zero exclusion theorem and Tsypkin-Polyak plot. The SM of linear affine dependency coefficients can not only determine whether a given system is robustly stable but also indicate the degree of an allowable disturbance under which the system is robustly stable...
To overcome the lack of bandwidth due to increase of wireless devices, using ultra-wideband (UWB) technology is attractive. However, a problem is the signal transmission power of UWB is restricted to as small as −41.3 dBm/MHz. To enhance the communication range, two-dimensional communication (2DC) technology is effective. UWB 2DC environment can be extended to cover the entire room by laying the 2DC...
An Image-projective Desktop Varnamala Trainer (IDVT) called SAKSHAR has been designed to improve the learning by children through an interactive audio visual feedback system. This device uses a projector to render a virtual display, which permits production of large interactive displays with minimal cost. The user's hand is recognized with the help of a Microsoft Kinect Version 2. The entire system...
The aim of this study is based on grey entropy model in grey system theory to evaluate the biochemical testing interval in preterm neonates, include growth hormone, insulin-like growth factors, IGF-binding proteins and leptin, the proteins known to be involved in the regulation of growth. And find the most important time for the testing each interval. First, we use the measurement data from blood...
During an emergency, personnel in emergency response departments transmit predetermined emergency broadcast announcements to promote smooth evacuation of the building's occupants. Fire and smoke proof shutters installed in buildings will close automatically or can be closed manually to prevent fire and smoke from spreading. Emergencies are generally not exactly the same as the ones for which the announcements...
A novel visual image retrieval technique for fast cross-view UAV localization is presented in this paper. Our first contribution is to address the computational complexity of raw image matching, which can be time/space intractable due to the high dimensionality of raw image data. We propose to exploit raw image matching, not for the direct matching between query and database images, but for mining...
Recently autonomous navigation technique for a mobile robot becomes very important. In a field of navigation, the technique for localization and mapping by laser range finder is one of the major interesting topic. In order to use the method, an environment map including navigation root is need to be prepared in advance. Then, it is necessary to travel the route once before to make the map and the...
Two robot tractors were used in a leader-follower system for agricultural field work. Each of the robots was fully independent and could conduct field work alone. They could also work together to form a certain spatial arrangement during the operation. During the headland turn, each robot was simplified as a rectangular zone, and the two robots cooperated and coordinated to turn to next path without...
On serious accidental situations, such that there is a cardiac arrest patient in a city, giving quick cardiopulmonary resuscitation (CPR) by a bystander increases the resuscitation probability significantly. However, we cannot always expect that a person who can perform correct CPR exists on the location. With the aim to support CPR where an accident happens, we develop a system to teach the correct...
Dielectric elastomers are the subject of intense research in material science. A large number of publications describe artificial muscles based on dielectric elastomer actuators as a promising alternative for an energy efficient, lightweight and flexible actuation architecture. Dielectric elastomer actuators could improve and extend the capabilities of robots in terms of soft kinematics for the direct...
Mobile service robots are expected to operate in our daily life soon, as mobile robot technologies such as SLAM are rapidly developing. As a new application area of the technologies, we propose mobile monitoring and support robot (MMSR), which maintains a residential environment to be comfortable, safe, and secure. A key to realizing MMSRs is monitoring the physical state of the environment. By using...
The modern trend of increased integration of formerly disparate systems is necessitating the development of advanced tools to study large-scale complex systems. This paper studies bifurcations in solution to an optimal control problem for robotic formation control. Robotic formation control is an excellent system-integration prototype problem because the scale of the problem can grow rapidly with...
This paper presents improved methods of tracking moving objects by using laser range finders located in the environment and of segmenting environmental maps weighted by the degree of human activity. The accuracy of our previously proposed method of detecting individuals needing route guidance service, which involves the use of an autonomous mobile robot, depends on the accuracy of pedestrian tracking...
System uptime is the crucial objective of data center operations. Distribution control system (DCS) proposes design topologies and attributes for critical network, electrical, and mechanical systems to attain these availability. Data center infrastructure management (DCIM) is hardware and software tools for monitor, measure, control, manage performance, utilization and energy consumption through direct...
Due to sharply rising labor costs in Thailand, many small and medium sized enterprises (SMEs) in various industrial sectors including seafood industry need to improve their competitive capability. The aim of proposed system is to replace workers with automatic machine for upgrading Thai SMEs in seafood cold storage business to survive and maintain their independence. A technique to design and implement...
We develop a preprocessing method to improve the performance of an intelligent motion controller. Our method addresses the competitive problems that have been observed in the coupled inverted pendula model, in which a controller outputs impulsive forces to produce the desired final states based on a look-up table (LUT) that stores dynamical correspondences from the initial to the final states. However,...
The deformable object such as string, cloth and paper, is soft and can change its shape easily. It is difficult for a robot to manipulate deformable object because it needs to deal with various shape. For the operation of deformable object, it is important to recognize the shape of them. In our previous research, point chain model and the string shape recognition method were proposed. Point chain...
At demolition or construction sites, workers have to handle heavy tools and materials over head. It is difficult to continue such works, and the work efficiency will be reduced. In order to continue these heavy works for a long time, we have developed a wearable upper limb support system for the heavy work over head. In the actual works, it is necessary for the system to perform motion support in...
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