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RISOptimal Decoupled Disturbance Observers for Dual Input Single Output Systems
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The disturbance observer (DOB) has been a popular robust control approach for servo enhancement in singleinput singleoutput systems. This paper presents a new extension of the DOB idea to dualand multiinput singleoutput ...
Closed-Loop High-Fidelity Simulation Integrating Finite Element Modeling With Feedback Controls in Additive Manufacturing
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A high-precision additive manufacturing (AM) process, powder bed fusion (PBF) has enabled unmatched agile manufacturing of a wide range of products from engine components to medical implants. While finite element modeling ...
New Hammerstein Modeling and Analysis for Controlling Melt Pool Width in Powder Bed Fusion Additive Manufacturing
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Despite the advantages and emerging applications, broader adoption of powder bed fusion (PBF) additive manufacturing is challenged by insufficient reliability and in-process variations. Finite element modeling and ...
Experimental Study on the Biaxial Loading Effect on Group Stud Shear Connectors of Steel-Concrete Composite Bridges
Publisher: American Society of Civil Engineers
Abstract: Clustering stud shear connectors with minimized spacing based on specifications to form group studs are useful for concrete slab prefabrication and prestress installation efficiency in steel-concrete composite bridges. To ...
Effects of Voids in Sintered Silver Joint on Thermal and Optoelectronic Performances of High Power Laser Diode
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The thermal and the optoelectronic performance of high power gallium arsenide (GaAs) laser diode dieattached with sintered silver joint were investigated. The thermal and mechanical characteristics of the Laser bar packaging ...
Temperature Dependent Dwell Fatigue Behavior of Nanosilver Sintered Lap Shear Joint
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A series of dwellfatigue tests were conducted on nanosilver sintered lap shear joint at elevated temperatures from 125 آ°C to 325 آ°C. The effects of temperature and loading conditions on dwellfatigue behavior of ...
Numerical Simulation for the Motion of the Flexible Floating Collision Prevention System
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The flexible floating collisionprevention system (FFSCS) is a valuable floating engineering structure that can be used to prevent the uncontrolled ships to collide with the nonnavigational bridge of a large seacrossing ...
Thermal Aging Effect on the Ratcheting Behavior of Pressurized Elbow Pipe
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this study, the ratcheting behaviors of pressurized Z2CN18.10 austenitic stainless steel elbow pipe influenced by the thermal aging process were experimentally investigated in controlled constant internal pressure and ...
Shake Table Tests of Tall-Pier Bridges to Evaluate Seismic Performance
Publisher: American Society of Civil Engineers
Abstract: More than 4% of the bridges in mountainous areas of Southwest China are constructed with piers having a height of over 4 m. Such piers are characterized by large structural flexibility and distributed mass. To investigate ...
Calibration of the Microparameters of Rock Specimens by Using Various Machine Learning Algorithms
Publisher: ASCE
Abstract: High accuracy in the simulation of the discrete-element method (DEM) depends on the proper selection of microparameters. In this study, the range of microparameters was determined through sensitivity analysis. Subsequently, ...