Browsing by Author "Tu, Yiliu (Paul)"
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Item Open Access Adaptive production scheduling and control in one-of-a-kind production(2010) Li, Wei; Tu, Yiliu (Paul); Xue, DeyiItem Open Access Adaptive production scheduling and control in one-of-a-kind production(2005) Li, Wei; Tu, Yiliu (Paul); Xue, DeyiItem Open Access An information systems framework for computer aided one-of-a-kind production(2009) Dean, Paul R.; Tu, Yiliu (Paul); Xue, DeyiItem Open Access Customer and supplier involved one-of-a-kind product design and manufacture(2010) Dong, Ying; Tu, Yiliu (Paul); Xue, DeyiItem Open Access Experimental Study on Axial Impact Mitigating Stick-Slip Vibration with a PDC Bit(2021-02-08) Wang, Yong; Ni, Hongjian; Tu, Yiliu (Paul); Wang, Ruihe; Wang, Xueying; Zhang, Heng; Lyu, Jiaxue; Xie, HongqiaoStick-slip vibration reduces the drilling rate of penetration, causes early wear of bits, and threatens the safety of downhole tools. Therefore, it is necessary to study suppression methods of stick-slip vibration to achieve efficient and safe drilling. Field tests show that the use of downhole axial impactors is helpful to mitigate stick-slip vibration and improve rock-breaking efficiency. However, there are many deficiencies in the study of how axial impact load affects stick-slip vibration of a PDC bit. In this paper, based on the two-degrees-of-freedom spring-mass-damper model and similarity theory, a laboratory experiment device for suppressing stick-slip vibration of a PDC bit under axial impact load has been developed, and systematic experimental research has been carried out. The results show that the axial impact force can suppress the stick-slip vibration by reducing the amplitude of weight on bit and torque fluctuations and by increasing the main frequency of torque. The amplitude of impact force affects the choice of the optimal back-rake angle. The impact frequency is negatively correlated with the fluctuation amplitude of the rotary speed. When the impact frequency is greater than 100 Hz, the fluctuation amplitude of the rotary speed will not decrease.Item Open Access Monitoring and Control System Design for a Catalyst Manufacturing Unit(2017) Windmuller, Simon D; Fapojuwo, Abraham; Pereira, Pedro; Fapojuwo, Abraham; Pereira, Pedro; Bartley, Norman; Tu, Yiliu (Paul)In the Oil and Gas Industry there are a lot of processes that imply the use of control systems. One of these processes is the In Situ Upgrading of Bitumen and Heavy Oils via Nanocatalysis for which a pilot plant has been idealized and built. This thesis works through the process of the design, implementation, evaluation and testing of a system specifically purposed to control and monitor the aforementioned process’ plant also known as the Catalyst Skid. The outcome of this work have shown an intrinsic exponential delay response to throughput change; results which were consistent throughout simulation, analysis and testing. From this work several design philosophy trends, functionality test procedures and communication benchmarks for this control system were obtained as well, achievements that cannot only be used in the Oil and Gas Industry but also in any other industrial applications where remote control systems are needed.Item Open Access Multi-Agent Modelling of Industrial Cyber-Physical Systems for IEC 61499 Based Distributed Intelligent Automation(2023-07-21) Lyu, Guolin; Brennan, Robert William; Li, Simon; Tu, Yiliu (Paul); Bisheban, Mahdis; Dankers, Arne; Kadera, PetrTraditional industrial automation systems developed under IEC 61131-3 in centralized architectures are statically programmed with determined procedures to perform predefined tasks in structured environments. Major challenges are that these systems designed under traditional engineering techniques and running on legacy automation platforms are unable to automatically discover alternative solutions, flexibly coordinate reconfigurable modules, and actively deploy corresponding functions, to quickly respond to frequent changes and intelligently adapt to evolving requirements in dynamic environments. The core objective of this research is to explore the design of multi-layer automation architectures to enable real-time adaptation at the device level and run-time intelligence throughout the whole system under a well-integrated modelling framework. Central to this goal is the research on the integration of multi-agent modelling and IEC 61499 function block modelling to form a new automation infrastructure for industrial cyber-physical systems. Multi-agent modelling uses autonomous and cooperative agents to achieve run-time intelligence in system design and module reconfiguration. IEC 61499 function block modelling applies object-oriented and event-driven function blocks to realize real-time adaption of automation logic and control algorithms. In this thesis, the design focuses on a two-layer self-manageable architecture modelling: a) the high-level cyber module designed as multi-agent computing model consisting of Monitoring Agent, Analysis Agent, Self-Learning Agent, Planning Agent, Execution Agent, and Knowledge Agent; and b) the low-level physical module designed as agent-embedded IEC 61499 function block model with Self-Manageable Service Execution Agent, Self-Configuration Agent, Self-Healing Agent, Self-Optimization Agent, and Self-Protection Agent. The design results in a new computing module for high-level multi-agent based automation architectures and a new design pattern for low-level function block modelled control solutions. The architecture modelling framework is demonstrated through various tests on the multi-agent simulation model developed in the agent modelling environment NetLogo and the experimental testbed designed on the Jetson Nano and Raspberry Pi platforms. The performance evaluation of regular execution time and adaptation time in two typical conditions for systems designed under three different architectures are also analyzed. The results demonstrate the ability of the proposed architecture to respond to major challenges in Industry 4.0.Item Open Access Optimal product design based upon customer requirements in one-of-a-kind production environment(2006) Hu, Lilin; Xue, Deyi; Tu, Yiliu (Paul)Item Open Access Product development process for one-of-a-kind production(2005) Li, Xiaodong Daniel; Tu, Yiliu (Paul); Xue, DeyiItem Open Access Research on product design and manufacturing for one-of-a-kind production(2010) Hong, Gang; Xue, Deyi; Tu, Yiliu (Paul)Item Open Access Scheduling and control of one of a king production(2008) Yu, Liang; Tu, Yiliu (Paul); Xue, DeyiItem Open Access Supplier selection and involvement in one of a kind production (OKP)(2008) Yuan, Shouhua Shawn; Tu, Yiliu (Paul)