Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Jari Kostamo"'
Publikováno v:
International Journal of Fluid Power. 15:11-18
This paper introduces a pilot operated miniature digital hydraulic valve with a high flow capacity, in comparison to the size of the valve, and a fast response. The valve is designed to be used as a part of a digital valve system, which consists of a
Autor:
Jari Kostamo, Harri Lipsanen, Pekka T. Törmä, Marco Mattila, Heikki Sipila, Marcos Bavdaz, Esa Kostamo, Nick Nelms, Christian Laubis, Brian Shortt, Pasi Kostamo
Publikováno v:
IEEE Transactions on Nuclear Science. 60:1311-1314
We have demonstrated the fabrication of ultra-thin Si fine grid supported silicon nitride X-ray windows. These X-ray windows exhibit unequaled transmission of soft X-rays, high strength and excellent thermal stability. Measured soft X-ray transmissio
Publikováno v:
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES. 23(9):1001-1010
In this article, the servo property of a high-performance magnetorheological valve will be evaluated by closing the pressure feedback loop. The magnetorheological valve developed in this study has two separately controllable fluid flow channels and i
Publikováno v:
Journal of Magnetism and Magnetic Materials. 323:3109-3116
The prospect of using ferromagnetic shape memory alloys (FSMAs) is promising for a resonant actuator that requires large strain output and a drive frequency below 1 kHz. In this investigation, three FSMA actuators, equipped with tetragonal off-stoich
Publikováno v:
IFAC Proceedings Volumes. 44:5176-5181
Field Robot Event is an annual student competition for small field robots. A Field Robot project has been seen as a motivating challenge for project-based learning as it results to a working prototype. In Finland the team has consisted of students fr
Publikováno v:
IEEE Aerospace and Electronic Systems Magazine. 21:9-14
A vehicular platform's dynamical behavior is analyzed as a basis for designing a laboratory test apparatus and an associated 2-dimensional orthogonal stabilizer. The test track caused inclination in the front direction to vary from -6.5deg to 7.2deg
Autor:
Jari Kostamo, Emanuele Guglielmino, Michele Focchi, Jonas Buchli, Matti Pietola, Darwin G. Caldwell, Claudio Semini, Esa Kostamo
Publikováno v:
Journal of Mechanical Design. 136
This paper presents an innovative solution for bounce reduction between a robotic leg and the ground by means of a semi-active compliant foot. The aim of this work is to enhance the controllability and the balance of a legged robot by improving the t
Autor:
Jari Kostamo, Vesa Saikko
Publikováno v:
Journal of biomechanics. 44(5)
A 16-station wear simulator of the pin-on-disc type, called RandomPOD, was designed, built, and validated. The primary area of application of the RandomPOD is wear studies of orthopaedic biomaterials. The type of relative motion between the bearing s
Publikováno v:
ASME 2010 Dynamic Systems and Control Conference, Volume 1.
Magnetorheological fluids are often proposed for applications requiring fast response and good controllability but the dynamic characteristics of the MR devices are seldom analyzed in detail. The aim of this study is to present a magnetorheological v
Publikováno v:
Smart Materials and Structures. 21:075030
Effects of the plate material, surface roughness and measuring gap height on static and dynamic yield stresses of a magnetorheological (MR) fluid were investigated with a commercial plate?plate magnetorheometer. Magnetic and non-magnetic plates with