Pub Date : 2019-05-01DOI: 10.1109/ICACMVE.2019.00012
Bi Yongmin, Zeng Jianbin, Chen Qifan, L. Mengru
The problem about how to arrange the valve block and how to connect the hole for the hydraulic manifold block has the characteristics of high complexity and strong coupling, which is the key to the hydraulic manifold block design. In this article, a genetic algorithm is designed to quickly find the global optimal solution of the problem. The basic mathematical models of the hydraulic manifold block are established, including the minimum wall thickness check model, the shape interference check model and the connection model of holes. In order to process constraints, a concept of taboos is defined. The fitness function of the genetic algorithm is calculated based on the mathematical models and the taboo value. The feasibility of the genetic algorithm is evaluated by designing a hydraulic manifold block of the left front leg of the spider-type aerial work vehicle.
{"title":"Intelligent Design of Hydraulic Manifold Block Based on Genetic Algorithm","authors":"Bi Yongmin, Zeng Jianbin, Chen Qifan, L. Mengru","doi":"10.1109/ICACMVE.2019.00012","DOIUrl":"https://doi.org/10.1109/ICACMVE.2019.00012","url":null,"abstract":"The problem about how to arrange the valve block and how to connect the hole for the hydraulic manifold block has the characteristics of high complexity and strong coupling, which is the key to the hydraulic manifold block design. In this article, a genetic algorithm is designed to quickly find the global optimal solution of the problem. The basic mathematical models of the hydraulic manifold block are established, including the minimum wall thickness check model, the shape interference check model and the connection model of holes. In order to process constraints, a concept of taboos is defined. The fitness function of the genetic algorithm is calculated based on the mathematical models and the taboo value. The feasibility of the genetic algorithm is evaluated by designing a hydraulic manifold block of the left front leg of the spider-type aerial work vehicle.","PeriodicalId":375616,"journal":{"name":"2019 International Conference on Advances in Construction Machinery and Vehicle Engineering (ICACMVE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130399152","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 : 2019-05-01DOI: 10.1109/ICACMVE.2019.00026
Z. Jiahua, Li Aiping, L. Xuemei
Assembly line balancing and sequencing are two main problems in the planning of a mixed-model assembly line. In recent years, the un-paced buffered mixed-model assembly line with buffers between workstations has been widely used in industry. In order to solve the balancing and sequencing problem and ensure the efficient operation of the assembly line, an integrated method for the balancing and sequencing of unpaced buffered mixed-model assembly line is proposed. A combined precedence diagram is used to transform the mixedmodel assembly line balancing problem into a single model balancing problem. The objective of the balancing problem is to minimize cycle time under given the number of the workstations. A combined priority rule is adopted to find a solution. Based on the result of the balancing problem, the NEH (Nawaz-Enscore-Ham) algorithm is implemented for the sequencing problem to minimize the makespan considering the blocking owing to the buffers. The effectiveness of the method is verified by three cases.
{"title":"An Integrated Method for the Un-Paced Buffered Mixed-Model Assembly Line Balancing and Sequencing","authors":"Z. Jiahua, Li Aiping, L. Xuemei","doi":"10.1109/ICACMVE.2019.00026","DOIUrl":"https://doi.org/10.1109/ICACMVE.2019.00026","url":null,"abstract":"Assembly line balancing and sequencing are two main problems in the planning of a mixed-model assembly line. In recent years, the un-paced buffered mixed-model assembly line with buffers between workstations has been widely used in industry. In order to solve the balancing and sequencing problem and ensure the efficient operation of the assembly line, an integrated method for the balancing and sequencing of unpaced buffered mixed-model assembly line is proposed. A combined precedence diagram is used to transform the mixedmodel assembly line balancing problem into a single model balancing problem. The objective of the balancing problem is to minimize cycle time under given the number of the workstations. A combined priority rule is adopted to find a solution. Based on the result of the balancing problem, the NEH (Nawaz-Enscore-Ham) algorithm is implemented for the sequencing problem to minimize the makespan considering the blocking owing to the buffers. The effectiveness of the method is verified by three cases.","PeriodicalId":375616,"journal":{"name":"2019 International Conference on Advances in Construction Machinery and Vehicle Engineering (ICACMVE)","volume":"53 93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114236616","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 : 2019-05-01DOI: 10.1109/ICACMVE.2019.00037
Bu Wanghui, Fang Laixin, Hou Kun, Chen Jing, An Xianghua
To protect human from sharp edges of passenger cars, the fillet radius of external projections on car surface should conform the national standard. To inspect underlying problems of the external projections on the design stage, a sphere should roll freely on the car surface in the design platform, which is difficult to achieve in the existing CAD software. Hence, a novel approach to establish the free rolling contact constraints is presented in this paper. The car surface is modelled by triangular facets, and the rolling of the sphere on car surface is converted to the motion on the facets. The rolling contact constraints for both single facet and double facets are established, and are switched through understanding the manipulation purpose of the designer. The tool of digital inspection for external projections is developed based on NX secondary development, which notably improves the inspection efficiency on the car design stage.
{"title":"Digital Inspection for External Projections of Passenger Cars Based on Free Rolling Contact Constraints","authors":"Bu Wanghui, Fang Laixin, Hou Kun, Chen Jing, An Xianghua","doi":"10.1109/ICACMVE.2019.00037","DOIUrl":"https://doi.org/10.1109/ICACMVE.2019.00037","url":null,"abstract":"To protect human from sharp edges of passenger cars, the fillet radius of external projections on car surface should conform the national standard. To inspect underlying problems of the external projections on the design stage, a sphere should roll freely on the car surface in the design platform, which is difficult to achieve in the existing CAD software. Hence, a novel approach to establish the free rolling contact constraints is presented in this paper. The car surface is modelled by triangular facets, and the rolling of the sphere on car surface is converted to the motion on the facets. The rolling contact constraints for both single facet and double facets are established, and are switched through understanding the manipulation purpose of the designer. The tool of digital inspection for external projections is developed based on NX secondary development, which notably improves the inspection efficiency on the car design stage.","PeriodicalId":375616,"journal":{"name":"2019 International Conference on Advances in Construction Machinery and Vehicle Engineering (ICACMVE)","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116715657","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 : 2019-05-01DOI: 10.1109/ICACMVE.2019.00086
Cheng Wei, Qin Xianrong, Yang Zhigang
The wind loads of tower crane may be changed greatly under the interference of building. Based on CFD numerical method, the building and tower crane model with different lateral and longitudinal spacing ratios were established, and wind load coefficients of tower crane with/without building around were obtained. By defining the along-wind interference factor, the distribution characteristics of interference factor of the mast section and the counter-jib section under different wind directions were systematically studied. The results show that the interference effect of building on tower crane under different lateral and longitudinal spacing ratios and different wind directions is mainly shielding effect. The distribution law of interference factor of mast section along the height accords with cubic function under 0°, 30° and 60° wind directions, and the maximum value is about 0.6 at 60° wind direction. The interference factor of counter-jib section fluctuate around 1 under different wind directions, but the distribution law of interference factor of counter-jib is consistent with quadratic function under 120° and 150° wind directions.
{"title":"Study of the Interference Effect of Building on the Along-Wind Load of Tower Crane","authors":"Cheng Wei, Qin Xianrong, Yang Zhigang","doi":"10.1109/ICACMVE.2019.00086","DOIUrl":"https://doi.org/10.1109/ICACMVE.2019.00086","url":null,"abstract":"The wind loads of tower crane may be changed greatly under the interference of building. Based on CFD numerical method, the building and tower crane model with different lateral and longitudinal spacing ratios were established, and wind load coefficients of tower crane with/without building around were obtained. By defining the along-wind interference factor, the distribution characteristics of interference factor of the mast section and the counter-jib section under different wind directions were systematically studied. The results show that the interference effect of building on tower crane under different lateral and longitudinal spacing ratios and different wind directions is mainly shielding effect. The distribution law of interference factor of mast section along the height accords with cubic function under 0°, 30° and 60° wind directions, and the maximum value is about 0.6 at 60° wind direction. The interference factor of counter-jib section fluctuate around 1 under different wind directions, but the distribution law of interference factor of counter-jib is consistent with quadratic function under 120° and 150° wind directions.","PeriodicalId":375616,"journal":{"name":"2019 International Conference on Advances in Construction Machinery and Vehicle Engineering (ICACMVE)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122869058","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 : 2019-05-01DOI: 10.1109/ICACMVE.2019.00033
Xu Yangzeng, L. Siyuan
This paper analyses the current situation of insufficient intellectualization of hydraulic system and component in the process of intellectualization of Engineering robots, and puts forward the way to develop hydraulic intelligent components. At the present the hydraulic intelligent components are still in the initiation period, the main requirements and means of product development are put forward in this paper. Emphasis is laid on the feasibility of implicit state space method as the core theory of hydraulic intelligent components, and a control algorithm of hydraulic components based on implicit state equation is proposed, which can realize the function of autonomous control. A parameter identification method based on the inverse operation of the above control algorithm is proposed, which can be used to construct a model-based intelligent fault diagnosis system for grey box identification, and for future use in the hydraulic technology. Fault diagnosis of hydraulic system and components are prospected. Hydraulic intelligent components are to be an agent. It continues to develop in application in intelligent construction machinery, and will inevitably open up a new practical application market in the development of digital twin technology.
{"title":"Study on Relationship of Intellectualization between Hydraulic Mobile Machinery and Hydraulic Components","authors":"Xu Yangzeng, L. Siyuan","doi":"10.1109/ICACMVE.2019.00033","DOIUrl":"https://doi.org/10.1109/ICACMVE.2019.00033","url":null,"abstract":"This paper analyses the current situation of insufficient intellectualization of hydraulic system and component in the process of intellectualization of Engineering robots, and puts forward the way to develop hydraulic intelligent components. At the present the hydraulic intelligent components are still in the initiation period, the main requirements and means of product development are put forward in this paper. Emphasis is laid on the feasibility of implicit state space method as the core theory of hydraulic intelligent components, and a control algorithm of hydraulic components based on implicit state equation is proposed, which can realize the function of autonomous control. A parameter identification method based on the inverse operation of the above control algorithm is proposed, which can be used to construct a model-based intelligent fault diagnosis system for grey box identification, and for future use in the hydraulic technology. Fault diagnosis of hydraulic system and components are prospected. Hydraulic intelligent components are to be an agent. It continues to develop in application in intelligent construction machinery, and will inevitably open up a new practical application market in the development of digital twin technology.","PeriodicalId":375616,"journal":{"name":"2019 International Conference on Advances in Construction Machinery and Vehicle Engineering (ICACMVE)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127002344","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 : 2019-05-01DOI: 10.1109/icacmve.2019.00005
{"title":"ICACMVE 2019 Preface","authors":"","doi":"10.1109/icacmve.2019.00005","DOIUrl":"https://doi.org/10.1109/icacmve.2019.00005","url":null,"abstract":"","PeriodicalId":375616,"journal":{"name":"2019 International Conference on Advances in Construction Machinery and Vehicle Engineering (ICACMVE)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125052059","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 : 2019-05-01DOI: 10.1109/ICACMVE.2019.00029
Du Jianwei, Gao Shunde, Teng Rumin
For the vibration of boom system which caused by luffing system of aerial platform folding-jib in working condition, the dynamic differential equation of the boom system is established by using the flexible multibody dynamics theory and the Lagrange equations in this article. By deriving and solving the dynamics differential equation, the dynamic analysis of each boom and the dynamic relationship between the cylinder pressure and flow are carried out. The results show that the vibration of the boom during lifting is due to the interaction between the extending motion and the flexible elastic vibration. In addition, it is necessary to consider the effect of the elastic deformation of each boom. This paper also provides theoretical foundation for deep research on the hydraulic control system to control the vibration of the boom.
{"title":"Dynamic Modeling and Analysis of Luffing System of Folding-Jib Aerial Platforms","authors":"Du Jianwei, Gao Shunde, Teng Rumin","doi":"10.1109/ICACMVE.2019.00029","DOIUrl":"https://doi.org/10.1109/ICACMVE.2019.00029","url":null,"abstract":"For the vibration of boom system which caused by luffing system of aerial platform folding-jib in working condition, the dynamic differential equation of the boom system is established by using the flexible multibody dynamics theory and the Lagrange equations in this article. By deriving and solving the dynamics differential equation, the dynamic analysis of each boom and the dynamic relationship between the cylinder pressure and flow are carried out. The results show that the vibration of the boom during lifting is due to the interaction between the extending motion and the flexible elastic vibration. In addition, it is necessary to consider the effect of the elastic deformation of each boom. This paper also provides theoretical foundation for deep research on the hydraulic control system to control the vibration of the boom.","PeriodicalId":375616,"journal":{"name":"2019 International Conference on Advances in Construction Machinery and Vehicle Engineering (ICACMVE)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133309504","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 : 2019-05-01DOI: 10.1109/ICACMVE.2019.00028
Yang Jixiang, Bian Yongming, Zeng Jianbin
In order to increase the energy saving effect of hybrid loader, a power system applied to parallel hybrid loader is proposed. The system structure, working condition characteristics and control strategy of hybrid loader are analysed, and the energy saving effect of working devices is studied. The parameters of the main components of a 5 tons hybrid loader are changed and simulated to find the best when working devices working or not. The simulation results demonstrate that the system installed the influence of working devices on fuel consumption, and whether using working devices causes some differences under dynamic rule-based control strategy. The volume of accumulator are the same while the displacement of pump/motor in hydraulic brake regeneration system using working devices should be bigger than the system under stopping working devices which means the condition of working devices is not negligible in the process of parameter matching for parallel hybrid loader .
{"title":"Research on the Energy Saving Effect of Working Devices on Parallel Hybrid Loader","authors":"Yang Jixiang, Bian Yongming, Zeng Jianbin","doi":"10.1109/ICACMVE.2019.00028","DOIUrl":"https://doi.org/10.1109/ICACMVE.2019.00028","url":null,"abstract":"In order to increase the energy saving effect of hybrid loader, a power system applied to parallel hybrid loader is proposed. The system structure, working condition characteristics and control strategy of hybrid loader are analysed, and the energy saving effect of working devices is studied. The parameters of the main components of a 5 tons hybrid loader are changed and simulated to find the best when working devices working or not. The simulation results demonstrate that the system installed the influence of working devices on fuel consumption, and whether using working devices causes some differences under dynamic rule-based control strategy. The volume of accumulator are the same while the displacement of pump/motor in hydraulic brake regeneration system using working devices should be bigger than the system under stopping working devices which means the condition of working devices is not negligible in the process of parameter matching for parallel hybrid loader .","PeriodicalId":375616,"journal":{"name":"2019 International Conference on Advances in Construction Machinery and Vehicle Engineering (ICACMVE)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122844223","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 : 2019-05-01DOI: 10.1109/ICACMVE.2019.00082
Q. Peng, Tang Genglin, L. Jianjun, Zhu Wenfeng
In this paper, aiming at the bonding spot welding process for heterogeneous metal plates with different strength and thickness, a finite element simulation model for bonding spot welding was established. By using simufact-welding simulation software, the effects of different thickness of adhesive layers on contact resistance, welding heat and welding residual stress of welding process were revealed. The results show that the contact resistance of bonding spot welding process is increased and the heat production of welding joint is increased due to the existence of adhesive layer. The equivalent residual stress of joint has the same change trend in both radial and axial directions, and the minimum value is obtained when the thickness of adhesive layer is 0.05mm.
{"title":"Numerical Simulation of Bonding Spot Welding of Steel and Aluminum Door Cover Parts Considering the Thickness of Hemming Adhesive","authors":"Q. Peng, Tang Genglin, L. Jianjun, Zhu Wenfeng","doi":"10.1109/ICACMVE.2019.00082","DOIUrl":"https://doi.org/10.1109/ICACMVE.2019.00082","url":null,"abstract":"In this paper, aiming at the bonding spot welding process for heterogeneous metal plates with different strength and thickness, a finite element simulation model for bonding spot welding was established. By using simufact-welding simulation software, the effects of different thickness of adhesive layers on contact resistance, welding heat and welding residual stress of welding process were revealed. The results show that the contact resistance of bonding spot welding process is increased and the heat production of welding joint is increased due to the existence of adhesive layer. The equivalent residual stress of joint has the same change trend in both radial and axial directions, and the minimum value is obtained when the thickness of adhesive layer is 0.05mm.","PeriodicalId":375616,"journal":{"name":"2019 International Conference on Advances in Construction Machinery and Vehicle Engineering (ICACMVE)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116479980","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 : 2019-05-01DOI: 10.1109/ICACMVE.2019.00021
Yunfei Ge, Qing Zhang, Xuehua Chen, Z. Wu
Aiming at studying the relationship between steering radius and the corresponding maximum speed of straddle carrier under the steering process, a research of the steering stability is conducted in this paper. First, a stability criterion is proposed to protect the straddle carrier from rolling over in the steering process. Next, the dynamic equations of the vehicle body system are established and the change of the body rolling angle is achieved. A method is proposed to determine the critical speed of rollover under a given steering radius. Finally a simulation using Adams is performed and the accuracy of the proposed method is verified. The study provides the theoretical basis for steering stability control of autonomous straddle carrier.
{"title":"Research on the Steering Stability of Autonomous Straddle Carrier","authors":"Yunfei Ge, Qing Zhang, Xuehua Chen, Z. Wu","doi":"10.1109/ICACMVE.2019.00021","DOIUrl":"https://doi.org/10.1109/ICACMVE.2019.00021","url":null,"abstract":"Aiming at studying the relationship between steering radius and the corresponding maximum speed of straddle carrier under the steering process, a research of the steering stability is conducted in this paper. First, a stability criterion is proposed to protect the straddle carrier from rolling over in the steering process. Next, the dynamic equations of the vehicle body system are established and the change of the body rolling angle is achieved. A method is proposed to determine the critical speed of rollover under a given steering radius. Finally a simulation using Adams is performed and the accuracy of the proposed method is verified. The study provides the theoretical basis for steering stability control of autonomous straddle carrier.","PeriodicalId":375616,"journal":{"name":"2019 International Conference on Advances in Construction Machinery and Vehicle Engineering (ICACMVE)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123929446","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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