Benjanarasuth, Taworn

Now showing 1 - 6 of 6

Some of the metrics are blocked by your
consent settings
Robust hybrid control for two-dimensional handheld micromanipulator
(2014-01-01)
Boksuwan, Sungwan
;
Benjanarasuth, Taworn
;
Kanamori, Chisato
;
Aoyama, Hisayuki
This paper proposes a two-dimensional handheld mi-cromanipulator oriented toward bio cell handling. The micromanipulator consists of two flexible links, each of which is constructed with a parallel beam structure. Electric coils and permanent magnets are used to produce an actuator to form double drivers. An explicit model predictive control combined with a PID controller called a robust hybrid control is proposed not only to achieve robust tracking performance, but also to dampen the vibration of the mechanism. The experimental results are compared to results from a standard PID controller to investigate the effectiveness of the micromanipulator.
Some of the metrics are blocked by your
consent settings
Tremor suppression for handheld micromanipulator using robust hybrid control
(2014-12-16)
Boksuwan, Sungwan
;
Benjanarasuth, Taworn
;
Kanamori, Chisato
;
Aoyama, Hisayuki
This paper proposes a suppression of tremor effects, fluctuations caused by a user's hand, on a handheld micromanipulator by means of a robust hybrid control scheme. The proposed control scheme is a combination between an explicit model predictive control and a PID controller. The advantage of the PID controller is a robustness. It is suitable for handling the holding angle changes. The explicit model predictive control provides the excellent tracking performance. In addition, the robust hybrid control can handle tremor effects successfully. The control objective is to achieve robust tracking performance, to dampen the vibration of the mechanism and to suppress a disturbance, a tremor. The experimental results are used to investigate the effectiveness of the proposed method.
Some of the metrics are blocked by your
consent settings
Code generation of fractional filters for dsPIC microcontrollers
(2011-12-01)
Boksuwan, Sungwan
;
Benjanarasuth, Taworn
The goal of code generation is to programmatically transform the structure and implementation of some algorithms into a particular code platform. In this paper, the platform of the dsPIC microcontrollers is targeted in order to take an advantage of the DSP engine built in such microcontroller for implementing digital filters and a PID controller. However, the defining and initializing process of fractional filters and the controller built in the library consumes a lot of developing time and probably causes human errors. Four MATLAB platform functions called tf2iircanonic, tf2transposed, tf2fir, fractionalPID are proposed to address those inconveniences. As a result, the designing process incorporating the proposed functions will exponentially enhance the developing procedure. © 2011 IEEE.
Some of the metrics are blocked by your
consent settings
Robust real-time model predictive control for torsional vibration system
(2012-01-01)
Boksuwan, Sungwan
;
Benjanarasuth, Taworn
In this paper, explicit, robust Model Predictive Control (MPC) is proposed for the control of a two-mass system in order to achieve not only good tracking performance and load-change effect rejection, but also low torsional vibration, when the measurement noise contains outliers. The control structure presented in this paper is based fundamentally on the combination of explicit MPC and region detection via a self-optimizing variable. In addition, the well-known Kalman filter is replaced by the robust Kalman filter to deal with the outlier signals. The effectiveness of the proposed method is compared with a PID-based control.
Some of the metrics are blocked by your
consent settings
A heated needle micromanipulator with hybrid control for heat-caused denaturation in proteins
(2015-08-25)
Boksuwan, Sungwan
;
Benjanarasuth, Taworn
;
Aoyama, Hisayuki
The paper proposes a micromanipulator with the heated needle as an end effector in order to transfer heat around a micro area of a sample, egg whites. The proposed micromanipulator is controlled by a combination of an explicit model predictive control and PID controller, so-called the hybrid control, to accomplish tracking performances of several reference paths or shapes of heating the specific area. A tungsten needle wrapped with nichrome wire is used as a heat source mechanism and is connected to the two dimensional micromanipulator. The experimental results reveal that the heated needle can provide high temperature up to 50°C with 10μm needle tip diameter. In addition, the results indicate the effective operations for a point heating and denaturing egg whites in micro scale. Moreover, the heated needle is able to heat along the desired paths (a circle, ellipse, square or triangle) with the error less than 2μm from the center of measurement.
Some of the metrics are blocked by your
consent settings
Optimal H2 controller design with derivative state constraints for torsional vibration system
(2009-01-01)
Komine, Noriyuki
;
Boksuwan, Sungwan
;
Benjanarasuth, Taworn
;
Ngamwiwit, Jongkol
The powerful derivative state constrained H<inf>2</inf> optimal is presented in order to reduce vibration in oscillatory system with a constant disturbance will be considered. It is shown that the derivative state constrained optimal H<inf>2</inf> integral problems can be reduced to the standard optimal H<inf>2</inf> control. In this paper, the derivative state constrained optimal H<inf>2</inf> integral controller is presented based on the optimal H<inf>2</inf> control problem to control underdamped responses of the linear systems. And the simulation results show that the proposed method is also effectiveness to reduce the damping for the torsional vibration based on two-inertia system.

Benjanarasuth, Taworn

Filters

Settings

Sort By

Results per page