{"title":"Real-Time Induction Motor Health Index Prediction in A Petrochemical Plant using Machine Learning","authors":"Waritsara Khrakhuean, P. Chutima","doi":"10.4186/ej.2022.26.5.91","DOIUrl":"https://doi.org/10.4186/ej.2022.26.5.91","url":null,"abstract":"","PeriodicalId":32885,"journal":{"name":"AlKhawarizmi Engineering Journal","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73110141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Verification-Based Decoding for Rateless Codes in the Presence of Errors and Erasures","authors":"Usana Tuntoolavesta, Nabeela Shaheen, Visuttha Manthamkarn","doi":"10.4186/ej.2022.26.4.37","DOIUrl":"https://doi.org/10.4186/ej.2022.26.4.37","url":null,"abstract":"","PeriodicalId":32885,"journal":{"name":"AlKhawarizmi Engineering Journal","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89283358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
L. Z. Mase, K. Amri, M. Farid, Fandi Rahmat, Muharram Nur Fikri, Jihan Saputra, S. Likitlersuang
{"title":"Effect of Water Level Fluctuation on Riverbank Stability at the Estuary Area of Muaro Kualo Segment, Muara Bangkahulu River in Bengkulu, Indonesia","authors":"L. Z. Mase, K. Amri, M. Farid, Fandi Rahmat, Muharram Nur Fikri, Jihan Saputra, S. Likitlersuang","doi":"10.4186/ej.2022.26.3.1","DOIUrl":"https://doi.org/10.4186/ej.2022.26.3.1","url":null,"abstract":"","PeriodicalId":32885,"journal":{"name":"AlKhawarizmi Engineering Journal","volume":"58 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78740982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Chontida Tanawatpaiboon, P. Ongkunaruk, Thaweephan Leingpibul
{"title":"The Application of Two Echelon Distribution Network Zoning in an Organic-Chemical Fertilizer Distribution: The Case Study in Northeastern Thailand","authors":"Chontida Tanawatpaiboon, P. Ongkunaruk, Thaweephan Leingpibul","doi":"10.4186/ej.2022.26.2.11","DOIUrl":"https://doi.org/10.4186/ej.2022.26.2.11","url":null,"abstract":"","PeriodicalId":32885,"journal":{"name":"AlKhawarizmi Engineering Journal","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84743608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Weiner Model Drop Test Identification of a Light Amphibious Airplane","authors":"S. Chinvorarat","doi":"10.4186/ej.2022.26.1.25","DOIUrl":"https://doi.org/10.4186/ej.2022.26.1.25","url":null,"abstract":"","PeriodicalId":32885,"journal":{"name":"AlKhawarizmi Engineering Journal","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87541844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-30DOI: 10.4186/ej.2021.25.12.51
S. Hadi, A. K. Tieu, Cheng Lu, Hai-liang Yu, Alain Kusmoko, A. Murdani, D. Ginting
A novel Bulged Punch (BP) was successfully performed for wrinkle elimination in micro cup drawings of AA1235 foils. BP was used to create a specific enlarged gradual punch profile before wrinkles began to occur until the end of the stroke, with fully annealing of AA1235 occurring before accumulative roll bonding (ARB), asymmetric rolling (AR), and stress relieving of a rolled blank, and deep drawing. The research purpose is to create a micro cup without wrinkles. The method was studied via experimentally deep drawing a blank thickness of 300 m with pairs of dies-BPs supported by a press tool. Blanks were processed under (a) ARB 4 and 6 cycles, (b) combined ARB with AR and (c) post-heat-treatment. The process was selected when a force (F) from the simulation matched with the measured value. The results showed that BP can simultaneously eliminate the occurrence of wrinkles at the cup edge, reduce the earing occurrence, increase cup corner thickness, and decrease the edge thickness. Simulation models were built using the finite element method software LS Dyna, which supports experimental evidence. The findings imply that BP can successfully eliminate wrinkles at the cup edge.
{"title":"Micro Cup Drawing without Wrinkles Using a Bulged Punch","authors":"S. Hadi, A. K. Tieu, Cheng Lu, Hai-liang Yu, Alain Kusmoko, A. Murdani, D. Ginting","doi":"10.4186/ej.2021.25.12.51","DOIUrl":"https://doi.org/10.4186/ej.2021.25.12.51","url":null,"abstract":"A novel Bulged Punch (BP) was successfully performed for wrinkle elimination in micro cup drawings of AA1235 foils. BP was used to create a specific enlarged gradual punch profile before wrinkles began to occur until the end of the stroke, with fully annealing of AA1235 occurring before accumulative roll bonding (ARB), asymmetric rolling (AR), and stress relieving of a rolled blank, and deep drawing. The research purpose is to create a micro cup without wrinkles. The method was studied via experimentally deep drawing a blank thickness of 300 m with pairs of dies-BPs supported by a press tool. Blanks were processed under (a) ARB 4 and 6 cycles, (b) combined ARB with AR and (c) post-heat-treatment. The process was selected when a force (F) from the simulation matched with the measured value. The results showed that BP can simultaneously eliminate the occurrence of wrinkles at the cup edge, reduce the earing occurrence, increase cup corner thickness, and decrease the edge thickness. Simulation models were built using the finite element method software LS Dyna, which supports experimental evidence. The findings imply that BP can successfully eliminate wrinkles at the cup edge.","PeriodicalId":32885,"journal":{"name":"AlKhawarizmi Engineering Journal","volume":"80 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74052917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-30DOI: 10.4186/ej.2021.25.12.21
Ehsan Ali, W. Pora
Developing complex algorithms on 8-bit processors without proper development tools is challenging. This paper integrates a series of novel techniques to improve the development cycle for 8-bit soft-macros such as Xilinx PicoBlaze. The improvements proposed in this paper reduce development time significantly by eliminating the required resynthesis of the whole design upon HDL source code changes. Additionally, a technique is proposed to increase the maximum supported data memory size for PicoBlaze which facilitates development of complex algorithms. Also, a general verification technique is proposed based on a series of testbenches that perform code verification using comparison method. The proposed testbench scenario integrates “InterProcessor Communication (IPC), shared memory, and interrupt” concepts that lays out a guideline for FPGA developers to verify their own designs using the proposed method. The proposed development cycle relies on a chip that has Programmable Logic (PL) fabric (to hold the soft processor) alongside of a hardened processor (to be used as algorithm verifier), therefore, a Xilinx Zynq Ultrascale+ MPSoC is chosen which has a hardened ARM processor. The development cycle proposed in this paper targets the PicoBlaze, but it can be easily ported to other FPGA macros such as Lattice Mico8, or any non-Xilinx FPGA macros.
{"title":"Improved Development Cycle for 8-bit FPGA-Based Soft-Macros Targeting Complex Algorithms","authors":"Ehsan Ali, W. Pora","doi":"10.4186/ej.2021.25.12.21","DOIUrl":"https://doi.org/10.4186/ej.2021.25.12.21","url":null,"abstract":"Developing complex algorithms on 8-bit processors without proper development tools is challenging. This paper integrates a series of novel techniques to improve the development cycle for 8-bit soft-macros such as Xilinx PicoBlaze. The improvements proposed in this paper reduce development time significantly by eliminating the required resynthesis of the whole design upon HDL source code changes. Additionally, a technique is proposed to increase the maximum supported data memory size for PicoBlaze which facilitates development of complex algorithms. Also, a general verification technique is proposed based on a series of testbenches that perform code verification using comparison method. The proposed testbench scenario integrates “InterProcessor Communication (IPC), shared memory, and interrupt” concepts that lays out a guideline for FPGA developers to verify their own designs using the proposed method. The proposed development cycle relies on a chip that has Programmable Logic (PL) fabric (to hold the soft processor) alongside of a hardened processor (to be used as algorithm verifier), therefore, a Xilinx Zynq Ultrascale+ MPSoC is chosen which has a hardened ARM processor. The development cycle proposed in this paper targets the PicoBlaze, but it can be easily ported to other FPGA macros such as Lattice Mico8, or any non-Xilinx FPGA macros.","PeriodicalId":32885,"journal":{"name":"AlKhawarizmi Engineering Journal","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72922434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-30DOI: 10.4186/ej.2021.25.12.37
Hendi Wicaksono Agung, I. Nilkhamhang
This study provides a formation-keeping method based on consensus for mobile robots used in cooperative transport applications that prevents accidental damage to the objects being carried. The algorithm can be used to move both rigid and elastic materials, where the desired formation geometry is predefined. The cooperative mobile robots must maintain formation even when encountering unknown obstacles, which are detected using each robot’s on-board sensors. Local actions would then be taken by the robot to avoid collision. However, the obstacles may not be detected by other robots in the formation due to line-of-sight or range limitations. Without sufficient communication or coordination between robots, local collision avoidance protocols may lead to the loss of formation geometry. This problem is most notable when the object being transported is deformable, which reduces the physical force interaction between robots when compared to rigid materials. Thus, a decentralized, hierarchical LQR control scheme is proposed that guarantees formation-keeping despite local collision avoidance actions, for both rigid and elastic objects. Representing the cooperative robot formation using multiagent system framework, graph Laplacian potential and Lyapunov stability analysis are used to guarantee tracking performance and consensus. The effectiveness and scalability of the proposed method are illustrated by computer simulations of line (2 robots) and quadrilateral (4 robots) formations. Different communication topologies are evaluated and provide insights into the minimum bandwidth required to maintain formation consensus.
{"title":"Hierarchical Decentralized LQR Control for Formation-Keeping of Cooperative Mobile Robots in Material Transport Tasks","authors":"Hendi Wicaksono Agung, I. Nilkhamhang","doi":"10.4186/ej.2021.25.12.37","DOIUrl":"https://doi.org/10.4186/ej.2021.25.12.37","url":null,"abstract":"This study provides a formation-keeping method based on consensus for mobile robots used in cooperative transport applications that prevents accidental damage to the objects being carried. The algorithm can be used to move both rigid and elastic materials, where the desired formation geometry is predefined. The cooperative mobile robots must maintain formation even when encountering unknown obstacles, which are detected using each robot’s on-board sensors. Local actions would then be taken by the robot to avoid collision. However, the obstacles may not be detected by other robots in the formation due to line-of-sight or range limitations. Without sufficient communication or coordination between robots, local collision avoidance protocols may lead to the loss of formation geometry. This problem is most notable when the object being transported is deformable, which reduces the physical force interaction between robots when compared to rigid materials. Thus, a decentralized, hierarchical LQR control scheme is proposed that guarantees formation-keeping despite local collision avoidance actions, for both rigid and elastic objects. Representing the cooperative robot formation using multiagent system framework, graph Laplacian potential and Lyapunov stability analysis are used to guarantee tracking performance and consensus. The effectiveness and scalability of the proposed method are illustrated by computer simulations of line (2 robots) and quadrilateral (4 robots) formations. Different communication topologies are evaluated and provide insights into the minimum bandwidth required to maintain formation consensus.","PeriodicalId":32885,"journal":{"name":"AlKhawarizmi Engineering Journal","volume":"128 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80428199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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