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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
221

A Study on the Relationship among Management Control Systems, Organizational Climate and Organizational Performance

Tai, Chih-Yen 09 June 2012 (has links)
This study is focused on how characters of management control system affect organizational climate and the how the relation between those two factors guide performance in different organizations. With four diffent case studies in Taiwan, this study found three types of reaction in management control system, organizational climate and organizational performance: mediator model, moderating model and interactive model. This study showed that the relationship among management control system, organizational climate and performance are not in a given type; there would be various possible mixes in their relationship. In mediator model, management control system is an important factor to improve performance and the awareness of organizational climate in employee directly affected the guiding effects of management control system to organizational performance. According to the previous finding, an environment makes the employee have better awareness about organizational climate will help managers to reach the performance goals with management control systems. In moderating model, organizational climate moderate the linkeage between managemeant control system and the awareness of performance in employee. It is not ony the factor to adjust effects of management control system but also change managers¡¦ designs of management control system and moderate the relationsip on management control system and performance. Organizational performance could be improved when managers design indicators and controlling mechanism with considered interactive effects in organizational climate. This study also found that industrial characters will affect operational process of management control system and awareness of organizational climate in employee. Due to professional knowledge is an important factor for employee in service industry to provide servive to their customers, attendance rate and safety of customers are two important indicators to management control system in such industry. According to this reaesch, the case in service industry put more focus on this performance item than the cases in manufacturing industry, so the study found the characters of industrial technology will also a factor to affect the design of management control system
222

The Influence of Management Control System on Organizational Citizenship Behavior: Using Non-Profit Organizations as an Example

Lin, Yi-Jyuan 02 July 2012 (has links)
Since Taiwan has rescinded martial law, the Non-Profit Organizations (NPOs) are blustery, vigorous development, regardless of all has the obvious growth in quantity or in the social influence. However, based on Harris¡¦ investigation, the outside funding source for NPOs has been declining dramatically since 1984. In this case, if NPOs cannot manage and control well, they won¡¦t be able to accomplish their organizational goal. Therefore, how to maintain the good organization achievements in multitudinous NPOs? In management control system(MCS) field, it has not many research to discuss about what type of MCS which Non-Profit Organizations is. The target of this study is the members of the Non-Profit Organizations¡¦(NPO) employees in Taiwan. To fulfill the purpose, survey research is selected as the main method of this study. The study is focused on the relations between the management control system, organizational citizenship behavior and organization trust.The purpose is to provide the NPO managers with reference materials of use management control system to boosting organizational citizenship behavior. The conclusion is as follows: 1.Clan control is the major management control system in educational foundation. 2.The clan control and organizational citizenship behavior have extremely positive correlation; the clan control and organization trust have extremely positive correlation; the organization trust and organizational citizenship behavior have extremely positive correlation. 3.The locus of control is not a moderator role of organizational citizenship behavior.
223

The Distributed Control Program Generator of Microprocessor-based Environment

Huang, Szu-kai 30 July 2012 (has links)
In the field of the industrial automatic control, both MCU (Micro Control Unit) and PLC (Programmable Logic Controller) are widely being used in DCS (Distributed Control System). Since MCU can provide complex process scheduling, accurate timing control and PLC has the advantages of easy programming and maintaining. However, the control programs of the MCU are hard to design and maintain. Identically, the poor signal processing ability, high cost and the restrictive functions are the major defects of PLC. In order to solve the drawbacks described above in MCU and PLC, we provide a PLC-like interface for users to access the devices and set the registers of MCU. Likewise, designers can develop the control program via Event-table-driven modules. On the other hand, our main goal of DCS is to quickly construct the distributed N level network topology based on Modbus protocol, which is efficient and reliable. Therefore, we bring up a data collection method and Slave-to-Slave strategy so as to distribute the master loading, reduce the package transmission times and improve the real-time latency. In conclusion, our research results not only congregate the benefits of MCU and PLC but provide an environment to quickly construct and conveniently monitor DCS, which meets the time-to-market demands.
224

Development of a Novel Linear Magnetostrictive Actuator

Sadighi, Ali 2010 August 1900 (has links)
This dissertation presents the development of a novel linear magnetostrictive actuator. The magnetostrictive material used here is Terfenol-D, an alloy of the formula Tb0.3Dy0.7Fe1.92. In response to a traveling magnetic field inside the Terfenol-D element, it moves in the opposite direction with a peristaltic motion. The proposed design offers the flexibility to operate the actuator in various configurations including local and conventional three-phase excitation. The conceptual design of the linear magnetostrictive actuator was performed during which different configurations were analyzed. Finite Element Analysis (FEA) was extensively used for magnetic circuit design and analysis in conceptual design. Eventually one of these designs was chosen based on which detailed design of linear magnetostrictive actuator was carried out. A new force transmission assembly incorporates spring washers to avoid the wear due to the sudden collision of Terfenol-D element with the force transmission assembly. All mechanical parts were then fabricated at the mechanical engineering machine shop. The power electronics to operate the motor in a local three-phase mode was designed and implemented. It was demonstrated that the power consumption can be reduced significantly by operating the magnetostrictive linear actuator in the local excitation mode. A finite-element model of the actuator was developed using ATILA and an empirical model was presented using the data gathered from numerous tests performed on the actuator. The closed-loop control system was implemented using relay control which resulted in an optimal closed-loop performance. The magnetostrictive actuator has demonstrated 410-N load capacity with a travel range of 45 mm, and the maximum speed is 9 mm/min. The maximum power consumption by the motor is 95 W. The sensorless control of the linear magnetostrictive actuator was successfully conducted using two different approaches. First, using a linear-approximation method, we achieved a position estimation capability with ±1 mm error. Then, an adaptive neuro-fuzzy inference system was employed for estimating the position which resulted in a position estimation capability with only a ±0.5 mm error.
225

A Rigging Convention for Isosurface-Based Characters

Davalath, Megha Nataraj 2011 May 1900 (has links)
This thesis presents a prototype system for generating animation control systems for isosurface-based characters that blurs the distinction between a skeletal rig and a particle system. Managing articulation and deformation set-up can be challenging for amorphous characters whose surface shape is defined at render time and can only be viewed as an approximation during the process of defining an animation performance. This prototype system utilizes conventional scripted techniques for defining animation control systems integrated with a graphical user interface that provides art directable control over surface contour, shape and silhouette for isosurface-based characters. Once animated, these characters can be rendered using Rendermans RIBlobby implementation and provide visual feedback of fluid motion tests. The prototype system fits naturally within common practices in digital character setup and provides the animator control over isosurface-based characters.
226

The Design of a Switchable Double-Action Manual/Electric Wheel-chair with an Auxiliary Driving Wheel

Chen, Jin-hwan 23 July 2004 (has links)
In the wheelchair family, a manual wheelchair is most commonly used by the lower-limb disabled, while its manual mode creates the lowest mechanical effi-ciency and the highest rate of upper-limb injury. Electric wheelchairs on the market are much more labor-saved; however, with their drive systems mostly combining with the bodies of the wheelchair, electric wheelchairs appear to be bulky and are not easily-carried. While in a limited space, on a short-distance moving, or in/off the elevator, electric wheelchairs cannot be practicably switched to manual ones. Thus, this text aims to develop a switchable dou-ble-action manual/electric wheelchair with an auxiliary driving wheel, expect-ing to increase the mechanical efficiency and not to enlarge the body of the wheelchair; the module-disassembled drive system is intended for the conven-ience of carrying. Besides, in order to keep both the manual and the electric functions, the caster contains a set of separable orientation control system, while enables the caster to be switched in both the modes of 360-degree rotation and of being controlled by the user. In this way, the use of the wheelchair would be-come much more multiple-choice.
227

Development of Monitoring and Control System for Switched Reluctance Motor Drive System

Wang, Yung-chin 28 June 2005 (has links)
The reluctance torque of switched reluctance motor could drive the rotor directly. Rotor doesn¡¦t need to be made from permanent magnet and the demagnetization and heat emission problems can be avoided. There are also a lot of advantages, such as the low cost, high efficiency, high stability and high hot emission, make it very attractive to the engineers and researchers. The dual-flange-pole rotor structure will induce non-linear magnetic filed in the air gap between armature and rotor, so the reluctance torque is not easy to handle. The switched reluctance motor is considered hard to control at the early stages of development. In recently years, with the rapid improvement of power electronic devices and microprocessor chips, the engineers and researchers pay more attentions to overcome the difficulties encountered in both the software and hardware step by step. It can now exert the motor¡¦s capability to contend with the inductor motor and the alternating current motor. Furthermore, it is more advantageous than others in the high energy density, high temperature and adverse circumstances. It has obviously caught caused the industry¡¦s attention and the academia's research interests. The work of this is to design and develop a drive system for the switched reluctance motor drive system by using the 32-bit floating point Digital Signal Processor, and operate it in coordination with the peripheral circuits. Finally, the study will integrate the graph control programming to design a monitoring and control system with Man-Machinery Interface (MMI) for monitoring voltage, current and speed of the switched reluctance motor drive system.
228

Development Of A Uav Testbed

Cakir, Zeynep 01 May 2011 (has links) (PDF)
The development and testing for a UAV testbed to be used in academic research and undergraduate education is proposed in this thesis. Analysis on commercial off-the-shelf UAV systems and autopilots lead to the development of a custom, open-architecture and modular UAV testbed. The main focus is to support research in UAV control field and education of the undergraduate students. The integration and use of commercial-off-the-shelf avionics and air vehicle are described in detail. System performance is examined both in flight and on the ground. Results of the system tests show that the developed system is a functional UAV testbed to be used in research of different flight control algorithms.
229

Automatic Status Logger For a Gas Turbine

Jonas, Susanne January 2007 (has links)
<p>The Company Siemens Industrial Turbo Machinery AB manufactures and launches in operation among other things gas turbines, steam turbines, compressors, turn-key power plants and carries out service for components for heat and power production. Siemens also performs research and development, marketing, sales and installations of turbines and completes power plants, service and refurbish.</p><p>Our thesis for the engineering degree is to develop an automatic status log which will be used as a tool to control how the status of the machine is before and after technical service at gas turbines. Operational disturbances will be registered in a structured way in order to get a good possibility to follow up the reliability of the application.</p><p>An automatic log function has been developed and will be activated at start, stop and shutdown of the turbine system. Log files are created automatically and get a name with the event type, the date and the time. The files contain data as timestamp, name, measured values and units of the signals which are going to be analyzed by the support engineers. They can evaluate the cause of the problem using the log files.</p>
230

Trådlös överföring av styrsignaler / Wireless Control signals

Holmström, Magnus January 2002 (has links)
<p>Anledningarna till att använda sig av en trådlös signalöverföring i en industri kan vara många, oftast handlar det om ställen där det är svårt eller omöjligt att ha en trådad förbindelse. I det här fallet är det en sedimenteringsbassäng där man tar hand om processvatten från industrin. Bassängen är utformad som en cylinder där vattnet rinner genom olika avdelningar för att minska innehållet av sediment. I bassängen cirkulerar en plattform med diverse omrörare och skrapor på. Eftersom denna del går runt hela tiden är det svårt att ha en fast förbindelse till de drifter som finns. Om man ska använda sig av en fast förbindelse måste kopplingen ske med släpringar, och denna typ av koppling kan bidra till en del problem vid signalöverföring i form av avbrott och störningar. Nu vill man prova alternativet att överföra alla styr och mätsignaler trådlöst. Trådlös signalöverföring är inget ovanligt, men det som är speciellt i det här fallet är att alla signaler ska gå trådlöst, även de som styr motordrifter.</p> / <p>There can be several reasons to use wireless signal transmission in a industry. Its often used in places where there is very hard ore impossible to use a cable. In this case it’s a basin that’s used for water cleaning that should be controlled wireless. The basin has a cylinder form and all the units that shouldbe controlled rotates in the basin. This makes it hard to use a cable. If a cable should be used the transmission between the rotating units and the control system needs to be connected with a drag contact that can lead to problems in the signal transfer. Now they want to try out the technology fore wireless transmission of the control signals. Today the basin is controlled by old electromechanically equipment that is mounted on the basin, but for better control and supervision of the basin its going to be controlled from a modern control system.</p>

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