12:50―13:10 Mechatronics Design of Vibration Rejection of the Feed Supporting System for the Square Kilometer Array
Y.X. Su, B.Y. Duan, Q. Wei, Xidian University, R.D. Nan, B. Peng, Chinese Academy of Sciences, PRC
The modified optomechatronics design of the feed supporting system for next generation large radio telescope-Square Kilometer Array (SKA) consisting of two parallel manipulators Stewart fine tuning platform is connected to the parallel cable manipulator with the so called cabin structure. Because the cabin structure is driven by six large span cables large vibration will induced resulting from the reaction forces of Stewart fine tuning platform. A mechatronics design strategy is proposed to achieve the vibration rejection and the basic idea is to use the damping force of electrorheological damper to counteract the reaction force of Stewart fine tuning platform. The reaction forces acted on the cabin structure is derived …
| T2C | Hydraulic Actuators | Manufacturing Systems II | T2D | SALA BIANCA | 11:30―13:10 | SALA TURCA | Bin Yao, USA | CHAIR | | Roberto Oboe, Italy | CO-CHAIR | Carlo Cloet, USA | Computational and Experimental Investigation on Solenoid Valve Dynamics
Viktor Szente, János Vad, Budapest University of Technology and Economics, Hungary
A generally applicable, synthetic simulation model and computational tool has been elaborated for dynamic simulation of solenoid valves (SVs) applied as control elements in fast-response pneumatic fluid power systems. The SV of case study has been modeled as a system consisting of coupled magneto-dynamic and mechanical subsystems. At the present state of investigation, fluid dynamic effects are not considered in the model. The appropriateness of the model has been verified by experimental data. The simulation model resolves the valve body motion and the solenoid current at a high accuracy. It has been pointed out in the concerted numerical and experimental studies that the valve body performs repetitive … | 11:30―11:50 | Coordinated Robots in a Flexible Manufacturing Work Cell
Devendra P. Garg, Clayton D. Poppe, Duke University, USA
Flexible manufacturing work cells provide excellent opportunities for enhancing both efficiency andproductivity in an automated manufacturing environment. Such cells typically integrate robots, a wide varietyof machinetools, material handling equipment, packaging devices,sensors, actuators, controllers, and similar other hardware. The coordinated control of robots in flexible manufacturing work cells presents a particularly challenging problem since ithas to respond to a need for adaptability for product changeand minimization of on-line setup time and costs. The major emphasis of this paper is on machine toolsand related hardware operating in flexible manufacturing work cells. It includes a discussion of motivation for flexible automation, past problems and recent advances, and guidelines forwork cell design. Problems associated with complicated automated …
| Integrated Direct/Indirect Adaptive Robust Motion Control of Single-Rod Hydraulic Actuators with Time-Varying Unknown Inertia
Fanping Bu, Bin Yao, Purdue University, USA
This paper studies the precision motion control of single-rod hydraulic actuators with accurate parameter estimations. An integrated direct/indirect adaptive robust controller (DIARC) is proposed to take into account the inherent nonlinearity, parametric uncertainties and uncertain nonlinearities associated with the hydraulic systems. Compared with existing direct ARC controller designs, the proposed DIARC controller not only achieves a better output tracking performance, but also provides better parameter estimations, which can be used for other purposes such as the higher level trajectory planning and the system and component health monitoring. These stronger theoretical results are made possible through the use of the new design philosophy of separating parameter estimation dynamics from the … | 11:50―12:10 | Study on High Precision Winding of Toroidal Coil and Automation of Its Process
Takashi Kawamura, Masayasu Shimaru, Masaru Nakazawa, Shinshu University, Masakatsu Sasahara, Kiyoto Kobayashi, Takayuki Kojima, Hermonic Drive Systems Inc., Japan
This paper deals with high precision coil winding machine for toroidal cores. This winding machine has new winding mechanism which consists of new shape winding ring and wire save ring proposed in this study. The mechanism gives the machine ability of tension control. Kink prevention equipment is designed to avoid kinks while winding. These improvements make high precision winding possible. This machine is better than machines currently in use specially for small size core and automation of its process. | Dynamic Model of a Pneumatic Proportional Pressure Valve
Massimo Sorli, Politecnico di Torino, Giorgio Figliolini, Università di Cassino, Stefano Pastorelli, Politecnico di Torino, Italy
A dynamic non linear model of a commercial proportional pressure valve, type Lucifer Honeywell EPP3 J-21-U-100-10, is formulated in order to simulate its behavior in time-domain under several operating conditions. The mechatronic design of the valve and its static and dynamic characteristics are analyzed carefully. Then, the modeling of the valve is carried out by taking into account its main internal devices, which are integrated all together inside the valve in order to allow the pressure control through an input electric signal. Finally, some diagrams given by a computer simulation confirm the validity of the proposed dynamic non linear model for this type of proportional valve.
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