**Commenced**in January 2007

**Frequency:**Monthly

**Edition:**International

**Paper Count:**8

# Search results for: V. Tawiwat

##### 8 Minimum Energy of a Prismatic Joint with out: Actuator: Application on RRP Robot

**Authors:**
Tawiwat V.,
Tosapolporn P.,
Kedit J.

**Abstract:**

This research proposes the state of art on how to control or find the trajectory paths of the RRP robot when the prismatic joint is malfunction. According to this situation, the minimum energy of the dynamic optimization is applied. The RRP robot or similar systems have been used in many areas such as fire fighter truck, laboratory equipment and military truck for example a rocket launcher. In order to keep on task that assigned, the trajectory paths must be computed. Here, the open loop control is applied and the result of an example show the reasonable solution which can be applied to the controllable system.

**Keywords:**
RRP robot,
Optimal Control,
Minimum Energy and Under Actuator.

##### 7 A Study of the Change of Damping Coefficient Regarding Minimum Displacement

**Authors:**
Tawiwat V.,
Narongkorn D.,
Auttapoom L.

**Abstract:**

This research proposes the change of damping coefficient regarding minimum displacement. From the mass with external forced and damper problem, when is the constant external forced transmitted to the understructure in the difference angle between 30 and 60 degrees. This force generates the vibration as general known; however, the objective of this problem is to have minimum displacement. As the angle is changed and the goal is the same; therefore, the damper of the system must be varied while keeping constant spring stiffness. The problem is solved by using nonlinear programming and the suitable changing of the damping coefficient is provided.

**Keywords:**
Damping coefficient,
Optimal control,
Minimum Displacement and Vibration

##### 6 Simulation of Polymeric Precursors Production from Wine Industrial Organic Wastes

**Authors:**
Tanapoom Phuncharoen,
Tawiwat Sriwongsa,
Kanita Boonruang,
Apichit Svang-ariyaskul

**Abstract:**

The production of Dimethyl acetal, Isovaleradehyde and Pyridine were simulated using Aspen Plus simulation. Upgrading cleaning water from wine industrial production is the main objective of the project. The winery waste composes of Acetaldehyde, Methanol, Ethyl Acetate, 1-propanol, water, *iso*-amyl alcohol and *iso*-butyl alcohol. The project is separated into three parts; separation, reaction, and purification. Various processes were considered to maximize the profit along with obtaining high purity and recovery of each component with optimum heat duty. The results show a significant value of the product with purity more than 75% and recovery over 98%.

**Keywords:**
Dimethyl acetal,
Pyridine,
wine,
Aspen Plus,
Isovaleradehyde,
polymeric precursors.

##### 5 The Optimal Design for Grip Force of Material Handling

**Authors:**
V. Tawiwat,
S. Sarawut

**Abstract:**

**Keywords:**
Optimize,
Gripper,
Mouse's Roller,
Minimum Force.

##### 4 A Study of Under Actuator Dynamic System by Comparing between Minimum Energy and Minimum Jerk Problems

**Authors:**
Tawiwat V.,
Phermsak S.,
Noppasit C.

**Abstract:**

This paper deals with under actuator dynamic systems such as spring-mass-damper system when the number of control variable is less than the number of state variable. In order to apply optimal control, the controllability must be checked. There are many objective functions to be selected as the goal of the optimal control such as minimum energy, maximum energy and minimum jerk. As the objective function is the first priority, if one like to have the second goal to be applied; however, it could not fit in the objective function format and also avoiding the vector cost for the objective, this paper will illustrate the problem of under actuator dynamic systems with the easiest to deal with comparing between minimum energy and minimum jerk.

**Keywords:**
Under actuator,
Dynamic optimal control,
Minimumjerk,
Minimum energy.

##### 3 Comparison between Minimum Direct and Indirect Jerks of Linear Dynamic Systems

**Authors:**
Tawiwat Veeraklaew,
Nathasit Phathana-im,
Songkit Heama

**Abstract:**

**Keywords:**
Optimization,
Dynamic,
Linear Systems,
Jerks.

##### 2 Combining Minimum Energy and Minimum Direct Jerk of Linear Dynamic Systems

**Authors:**
V. Tawiwat,
P. Jumnong

**Abstract:**

**Keywords:**
Optimization,
Dynamic,
Linear Systems,
Jerks.

##### 1 Analysis and Application of in Indirect MinimumJerk Method for Higher order Differential Equation in Dynamics Optimization Systems

**Authors:**
V. Tawiwat,
T. Amornthep,
P. Pnop

**Abstract:**

**Keywords:**
Optimization,
Dynamic,
Linear Systems,
Jerks.