Testing State-Space Controls for the Controls Advanced Research Turbine

2006 ◽  
Vol 128 (4) ◽  
pp. 506-515 ◽  
Author(s):  
Alan D. Wright ◽  
Lee J. Fingersh ◽  
Mark J. Balas
Keyword(s):  
State Space ◽  
Control Systems ◽  
Dynamic Loads ◽  
Test Results ◽  
Future Studies ◽  
Energy Capture ◽  
Torsion Mode ◽  
Turbine Performance ◽  
Advanced Controls ◽  
Turbine Speed

Control can improve wind turbine performance by enhancing energy capture and reducing dynamic loads. At the National Renewable Energy Laboratory, we are implementing and testing state-space controls on the controls advanced research turbine (CART), a turbine specifically configured to test advanced controls. We show the design of control systems to regulate turbine speed in region 3 using rotor collective pitch and reduce dynamic loads in regions 2 and 3 using generator torque. These controls enhance damping in the first drive train torsion mode. We base these designs on sensors typically used in commercial turbines. We evaluate the performance of these controls by showing field test results. We also compare results from these modern controllers to results from a baseline controller for the CART. Finally, we report conclusions to this work and outline future studies.

The effect of formula t-shirt method for scientists taught in science lessons in secondary schools on academic success

2020 ◽  
Vol 8 (S3) ◽  
pp. 1-10
Author(s):  
Burhan Karasu ◽  
Keyword(s):  
Academic Success ◽  
Secondary School ◽  
Item Analysis ◽  
Achievement Test ◽  
Test Results ◽  
Future Studies ◽  
Learning Techniques ◽  
Post Test ◽  
Research Findings ◽  
Experimental Group

The aim of this research is to investigate whether there is a meaningful difference in the academic success, between the students who are applied the "formula t-shirt method" (experimental group) and the students who are not (in other classes of the school), in the education for the scientists wanted to be taught in the secondary school 5th, 6th and 7th grade science textbooks. Semi-experimental method was used as research method. In the 6th grade, 27 students participated in this study as experimental group (students wearing t-shirts) and 49 students in the other classes of the school that did not participate in the study. Academic achievement test including pre-test and post-test, informative observations, students’ and teacher’s interviews as well as 20 printed t-shirts were used to collect data. The pilot study of the developed achievement test was applied in another school and also the item analysis of it was performed. According to the research findings, when the experimental group’s success post-test results from the application performed, were examined in line with the interviews, significant differences were observed. It was seen that the subjects aimed to be gained with the formula t-shirt method, were adopted by the students and also increased their success. Looking at the results of the research, thanks to wearing the t-shirts prepared by using the human body on the background, and the reconciliation of the students wearing with the scientists on t-shirts, the desired learning was provided. This also contributed to such learning techniques as peer learning, active learning, social learning in terms of visuality and integrity. It is thought that these materials developed with the formula t-shirt method, will also inspire researchers for future studies in terms of their usability in other fields and subjects

Quantitative Models for Complex Physical Systems

2014 ◽  
Vol 1061-1062 ◽  
pp. 1144-1147
Author(s):  
Jun Fu ◽  
Jin Zhao Wu ◽  
Ning Zhou ◽  
Hong Yan Tan
Keyword(s):  
Quantitative Analysis ◽  
State Space ◽  
Control Systems ◽  
Chemical Reaction ◽  
Metric Space ◽  
Manufacturing Systems ◽  
Quantitative Model ◽  
Hybrid Automata ◽  
Physical Systems ◽  
The Difference

We present a quantitative model, called metric hybrid automata, for quantifying the behaviors of complex physical systems, such as chemical reaction control systems, manufacturing systems etc. Due to the introduction of a metric, the state space of hybrid automata forms a metric space, in which the difference of states can be quantified. Furthermore, in order to reveal the distance of system behaviors, we construct the simulation distance and the bisimulation distance, which quantify the similarity of system behaviors. Our model provides the basis for quantitative analysis for those complex physical systems.

scholarly journals The Study of Interoperability Test for Onboard Control System in Railway Condition

2011 ◽  
Vol 2-3 ◽  
pp. 785-790
Author(s):  
Jong Hyen Baek ◽  
Yong Kyu Kim ◽  
Jae Ho Lee ◽  
Hyen Jung Jo
Keyword(s):  
Control System ◽  
Control Systems ◽  
Data Systems ◽  
Test Results ◽  
Simulation Environment ◽  
Train Control ◽  
Interoperability Test ◽  
Critical Characteristics ◽  
Site Test ◽  
Onboard Equipment

For the purpose of improving the future domestic train control systems and securing interoperability, according to the global development trends of train control systems, it is presented that the test results of interoperability between wayside train control systems installed in existed line, and the onboard train control system. Due to the safety-critical characteristics of train systems, the site test in the section where the wayside equipment is installed may lead to a danger against safety. Therefore, by way of constructing a simulation environment of train control systems, the T/R data systems of the equipment for interoperability are confirmed and the interoperability test are obtained by applying these systems to onboard equipment.

scholarly journals Do Children Benefit External Focus of Attention as Much as Adults? A Motor Learning Study

2017 ◽  
Vol 11 (7) ◽  
pp. 85 ◽  
Author(s):  
Somaye Roshandel ◽  
Hamidreza Taheri ◽  
Amir Moghadam
Keyword(s):  
Motor Skills ◽  
Retention Test ◽  
Attentional Focus ◽  
Focus Of Attention ◽  
Learning Study ◽  
Test Results ◽  
Future Studies ◽  
External Focus ◽  
Internal Focus ◽  
And Task

Recent evidence supports advantages of an external focus of attention on learning motor skills, however, there is a need to retest these finding for children and comparing them with adults. Thus, the purpose of current study was to determine the effect of different attentional focus on learning a motor skill in children and adults. Thirty children (8-12 year) and thirty adults (25-42 years) were randomly assigned to one of four groups: (1) Children external focus of attention (EFA), (2) Children- internal focus of attention (IFA), (3) Adults- External focus of attention (EFA), (4) Adults- internal focus of attention (IFA). Following initial instructions and task demonstration, participants performed 60 darts throwing in six blocks and 24 hours later performed 10 additional throws for retention test. Results revealed that children benefited from EFA and IFA instruction in the same manner, however, adults benefited from EFA more than IFA instruction. Future studies should continue to examine effects of different attentional focus on other skills.

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