Adoption of magnetic levitation techniques for production lines steel plates has many advantages such as simplification machining processes and improvement in quality products. However conventional procedures have not solved the problem thin sideslipping caused by gravitational force. In this paper, following idea is proposed order to avoid sideslip: gap length command between plate electromagnet corrected so levitate horizontally. Various experiments are performed under control, confirm validity.

This paper presents a design method of an adaptive controller based on time-state form for nonholonomic space robot which consists base, arm and two weights. We assume that the base are connected at center gravity weights same. The assumed to move synchronously.

In the steel industry, demand for thin plates having beneficial functions obtained by surface processing increases rapidly. Then, requirements to surface-qualities of are becoming stricter. Accordingly, we sure that magnetic levitation technique is best deal with such functional plates, because nothing touches surfaces plate while treating it. We have already studied plate's elasticity and vibrations successfully carried out many experiments on so far. (Refer [1] - [3]). However, it a...

During an elevator emergency stop device operation, a large deceleration is generated at the cage. Passengers in cage sometimes get injured, because they suffer impact force from device. (Refer to [1] and [2].) Therefore, authors focused on passengers' safety elevators proposed with spring magnetic rheological fluid (hereafter MRF) damper (Fig.1 (a)) which can continuously vary its damping coefficient by controlling field. In fact, of MRF made up our laboratory varies almost linearly...

This paper deals with a novel type of semi active damper, which is composed cylinder injected Magnetic Rheological Fluid (MRF) and an electromagnet nonlinear H/spl infin/ controller. It generally known that the viscosity MRF can be changed by magnitude magnetic field. Therefore, this study aims at constructing such damper system makes good use property. A flow for controlling as follows. First, if current changed, field generated changed. Next, also Thus, motion piston set under controlled....

In this paper, a new precise positioning control of Linear Induction Motor (LIM) system guided by linear ball bearing is proposed. A coarse drive force resolution and slow response the LIM can be overcome special algorithm utilizing spring behaviors guide mechanism, therefore, preciseness effectively improved. Our proposed combination feedforward thrust based on nonlinear characteristic usual PI-D control. The experiment showed better than 2μm.

Adopting magnetic levitation techniques in Steel Processing Industries is a beneficial way maintaining the high quality of steel's surfaces. However, control for and guidance not so easy, because difficulties mechanical characteristics steel, especially those thin steel plates. We have already established stable 1.6mm-thick plates mainly. In this paper, we aim at 0.1mm-thick plate, which thinness our supreme target. order to realize such noncontact system plates, take account its vibration...

This paper deals with a novel type of semiactive damper which is composed cylinder injected magnetic rheological fluid (MRF) and an electromagnet nonlinear H/sup /spl infin// controller. It generally known that the viscosity MRF depends on magnitude field. Therefore, this aims at controlling damping property mechanical system by changing In study, modeled precisely, design method controller proposed finally various advantages are confirmed digital simulation.

In countries where the economy is growing rapidly, many skyscrapers are being built one after another. For such skyscrapers, highspeed and safe elevators essential as transportation means. Therefore, we have proposed an elevator with magnetorheological fluid (i.e., MRF) dampers to improve safety of passengers ([1]). supplying elevators, consider various dangerous factors, natural disasters, accidents so on. If a disastrous earthquake occurs, works earthquake-sensing system stops at nearest...

The linear induction motor (LIM) is cost-effective, but exhibits low positioning precision because of the presence nonlinear friction. This paper deals with precise control method a LIM using high-order disturbance observer and modeling compensation for rolling friction ball guide attached to LIM. Through various experiments, we demonstrate that our proposed smaller than ± 0.15 (μ m).

Magnetic levitation techniques [1]-[3] have been used in various industry areas. Recently, although adopting magnetic a process line for very thin steel plates is expected to maintain the high quality of plate surfaces, realization has not achieved. The reason that control difficult due saturation and vibration [4]. However, we had already established stable levitation, guidance conveyance 1.6mm-thick without any contact. Fig.1 shows system consists four electromagnets, gap sensors, two...

This paper shows a new parameter adjustment law of PID controllers for MIMO linear system with guaranteed disturbance attenuation performance. In the proposed design approach, problem parameters is reduced to static output feedback systems. this paper, we show that sufficient conditions existence control can be solvability matrix inequalities (LMIs). Finally, simple numerical example shown effectiveness system.

In this paper, we will propose an interesting baton-pass mechanism for a thin steel plate. addition, show the successful experimental results when plate is handed to adjoined electromagnets without any contacts. Structure and Control Method of Magnetic Levitation System Our magnetic levitation system plates consists six electromagnets, gap sensors, four sideslip LabVIEW-PX1(DSP with A/D D/A converters). Basically, can levitate by two LabVIEW-PX1 as proposed in our original paper.

Summary form only given. The complete presentation was not made available for publication as part of the conference proceedings.

Several safety devices are installed in elevators to protect passengers. An emergency-stop-device is a device that operates during emergencies such as the breaking of wires. This stops elevator immediately, and result, generates an excessive impact force on passengers has risk injury Therefore, we propose new system equipped with magneto-rheological fluid (MRF) semi-active damper spring double-cage structure currently used absorb this force. In previous study, verified effectiveness proposed...