A Study on Fault Detection Algorithm for Motor Control Unit of Electric Vehicle

2013 ◽  
Vol 431 ◽  
pp. 226-230
Author(s):  
Dong Hyun Seo ◽  
Wae Gyeong Shin ◽  
Jong Sang No
Keyword(s):  
Motor Control ◽  
Fault Detection ◽  
Real Time ◽  
Electric Motor ◽  
Control Unit ◽  
Detection Algorithm ◽  
Control Units ◽  
Safety And Reliability ◽  
Different Characteristics ◽  
And Control

Algorithms for motor control unit in electric vehicles are being actively developed with consideration given to safety and reliability these days. Faults during driving are a critical problem that is directly linked to the safety of drivers, and studies on fault detection of control units in various situations are needed. This study investigated the faults of control units in a signal level interface with a dynamic model of drive motor and the real-time interconnection of motor control unit and HILS (hardware-in-the-loop simulation). It was found through real-time simulation that simulating the fault conditions with the sensors of motor control unit could reveal different characteristics of motor control unit. Furthermore, vehicle driving simulations with electric motor control were performed. The results of this study are expected to help the development of electric motor simulations and the evaluation of MCU and control algorithms.

Real-time fault detection algorithm for the Space Shuttle Main Engine

1990 ◽  
Author(s):  
H. PANOSSIAN ◽  
V. KEMP ◽  
R. NELSON ◽  
M. TANIGUCHI
Keyword(s):  
Fault Detection ◽  
Real Time ◽  
Space Shuttle ◽  
Detection Algorithm ◽  
Main Engine

A Stimulation-Retreat Special Care Unit for Elders With Dementing Illness

1998 ◽  
Vol 10 (4) ◽  
pp. 379-395 ◽  
Author(s):  
M. Powell Lawton ◽  
Kimberly Van Haitsma ◽  
Jennifer Klapper ◽  
Morton H. Kleban ◽  
Ira R. Katz ◽  
...  
Keyword(s):  
Control Unit ◽  
Special Care ◽  
Special Care Unit ◽  
Negative Behaviors ◽  
Positive Behaviors ◽  
Control Units ◽  
Dementing Illness ◽  
And Control ◽  
Negative Attributes ◽  
Additional Stimulation

Two equivalent special care nursing home units for elders with dementing illness were randomly designated as experimental and control units for an intervention called the “stimulation-retreat” model. This model introduced a set of staffing and program changes whose purpose was to diagnose, prescribe, and apply a package of care according to individual needs for additional stimulation or relief from stimulation (“retreat”). A total of 49 experimental and 48 control unit residents completed 12 months of care and were evaluated at baseline, 6 months, and 12 months. It was hypothesized that the intervention would not affect the basic disability (cognitive and activities of daily living functions), would improve negative behaviors and observed affects, and would have maximum impact in increasing positive behaviors and affects. Over time, most functions worsened, including negative attributes and affects. Lesser decline in positive affect and increases in external engagement, however, led to the conclusion that the intervention showed a marginally significant and selective effect on positive behaviors and affect.

Development of Field Control System of Automated Guided Vehicle Based on Wireless Local Area Network and CAN Bus

2013 ◽  
Vol 579-580 ◽  
pp. 792-797
Author(s):  
Yan Wang ◽  
Zhong Da Yu ◽  
Chen Xing Bao ◽  
Dong Xiang Shao
Keyword(s):  
Control System ◽  
Real Time ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Can Bus ◽  
Control Unit ◽  
Local Area ◽  
Automated Guided Vehicle ◽  
Area Network ◽  
Control Units

In this paper, we realize a real-time communication based on wireless local area network (WIFI) and controller area network (CAN) bus and develop a distributed control system for an automated guided vehicle (AGV). The system consists of two levels: (1) communication between AGVs and main computer based on WIFI, (2) communicationg between control units of AGV based on CAN bus. A real-time operating system μC/OS-II was used to control time, which significantly reduces the time for program and improves development efficiency. Finally, a small-size distributed AGV controller is developed as the main control unit of AGV and a distributed I/O system is developed based on it.

A Redundancy Design Schema of Distributed Real-Time Database Applied in ISCS

2012 ◽  
Vol 174-177 ◽  
pp. 2142-2146
Author(s):  
Jun Wei Du ◽  
Wei Qiang Chen ◽  
Zhong Zhu ◽  
Xin Liu ◽  
Si Jun Wan ◽  
...  
Keyword(s):  
Control System ◽  
Fault Detection ◽  
Real Time ◽  
Fault Tolerant ◽  
Processing Technology ◽  
Data Redundancy ◽  
Real Time Database ◽  
Redundancy Design ◽  
And Control

Reliability is one of the most important properties of integrated supervisory and control system (ISCS) in metro. Redundancy technology, a fault tolerant mechanism, can significantly improve ISCS reliability. This paper introduces a redundancy design schema and its implementation in distributed real-time database, which is the kernel part of ISCS, Including upstream and downstream data redundancy processing technology, fault detection and redundancy switch technology. The result shows that this schema is feasible and reasonable.

scholarly journals Do early trends in oak barrens fire treatment predict later outcomes? Insights from three decades of vegetation monitoring

Fire Ecology ◽  
2020 ◽  
Vol 16 (1) ◽  
Author(s):  
John B. Taft
Keyword(s):  
Species Diversity ◽  
Fire Management ◽  
Basal Area ◽  
Control Unit ◽  
Species Density ◽  
Ground Layer ◽  
Treatment Unit ◽  
Reliable Predictor ◽  
Control Units ◽  
And Control

Abstract Background Vegetation structure, species diversity, and composition have been monitored at a fire-treatment and a fire-free control unit of a dry oak barrens and woodland complex in southern Illinois, USA, over a 29-year period and five burns. The restoration hypothesis is that fire management would result in different trends for vegetation parameters of conservation interest between fire treatment and control units, that before–after differences would be greater with fire management, and that early trends provide a reliable predictor for later outcomes. This study examines effectiveness of management in achieving restoration goals and uses response to the first two burns and monitoring results over the first seven years as an estimation period to test whether early trends with fire treatment are a reliable predictor for outcomes following three additional burns over the following 22 years. Results Trends differed between fire-treatment and control units for all parameters measured, and before–after differences were greater at the fire treatment unit. However, trends at the fire-treatment unit during the estimation period were a poor predictor of later outcomes. Tree density and basal area declined more than expected while ground-layer species density, richness, diversity, and percent cover did not keep pace with expectations of increase. Trends at the control unit were more predictable; however, tree basal area declined more than expected, possibly due to an outbreak of rapid white oak mortality disease, and decline of ground-layer species density was less than predicted from the early estimation period. Conclusions Results suggested that fire alone can be effective at restoring woodland and barrens natural areas and that a fire return interval of about every four years would be optimal for maintaining composition and diversity in this specific oak barrens habitat. However, burns followed immediately by severe drought possibly can have negative interactions, resulting in declines of ground-layer species diversity.

scholarly journals Removal of Pathogens from Domestic Wastewater Using Small-Scale Gradual Hydroponics Planted with Duranta erecta, Addis Ababa, Ethiopia

2022 ◽  
Vol 2022 ◽  
pp. 1-9
Author(s):  
Solomon Tibebu ◽  
Abebe Worku ◽  
Kenatu Angassa
Keyword(s):  
Heterotrophic Bacteria ◽  
Addis Ababa ◽  
Control Unit ◽  
Domestic Wastewater ◽  
Experimental Unit ◽  
Small Scale ◽  
Hydroponic System ◽  
Control Units ◽  
Significant Difference ◽  
And Control

This study aimed to evaluate the treatment potential of gradual hydroponics planted with Duranta erecta in the removal of pathogens from domestic wastewater. Two experimental and control units were configured in series. Each unit contains three bioreactors and was arranged in a cascaded configuration. The two experimental units used both plant and media, but the two control units used only media to treat the wastewater. Gravel and polyester sponge were used as media. Experimental unit 1 and control unit 1 used gravel as media; however, experimental unit 2 and control unit 2 used polyester sponges as media. The experiment was operated at hydraulic retention times of 1, 3, 5, and 7 days in a continuous mode. The performance of the hydroponic system was evaluated by characterizing the influent and effluent quality using standard methods. At optimum hydraulic retention time (7 days), the average removal of experimental units 1 and 2 was 98.7% and 89.8% for heterotrophic bacteria, 96.2% and 86.8% for total coliform, and 92.9% and 84.0% for fecal coliform, respectively. Analysis of variance showed that there was a significant difference P < 0.05 between the two experimental and control units in removing pathogens, but no significant difference P > 0.05 was observed between the two experimental units and between the two control units. Heterotrophic bacteria and coliforms were satisfactorily removed from domestic wastewater via a gradual hydroponic system. Hence, the hydroponic treatment system planted with Duranta erecta has a promising potential in the removal of pathogens from domestic wastewater in developing countries including Ethiopia.

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