A5103205966- Dynamics and Control of Mechanical Systems
- Advanced machining processes and optimization
- Advanced Machining and Optimization Techniques
- Control and Dynamics of Mobile Robots
- Advanced Surface Polishing Techniques
- Vibration and Dynamic Analysis
- Opinion Dynamics and Social Influence
- Complex Network Analysis Techniques
- Misinformation and Its Impacts
- Experimental Behavioral Economics Studies
- Modular Robots and Swarm Intelligence
- Adhesion, Friction, and Surface Interactions
- Chalcogenide Semiconductor Thin Films
- Nonlinear Dynamics and Pattern Formation
- Soft Robotics and Applications
- Animal Behavior and Reproduction
- Mobile Crowdsensing and Crowdsourcing
- Research studies in Vietnam
- Quantum Dots Synthesis And Properties
- Agricultural Engineering and Mechanization
- Information and Cyber Security
- Metallic Glasses and Amorphous Alloys
- Granular flow and fluidized beds
- Robotic Locomotion and Control
- Magnetic Bearings and Levitation Dynamics
Thai Nguyen University
2007-2023
Hanoi University of Mining and Geology
2023
Phenikaa University
2022
Metropolitan State University of Denver
2022
Nong Lam University Ho Chi Minh City
2017-2021
Van Lang University
2019
Lawrence Livermore National Laboratory
2019
Duy Tan University
2019
Bạch Mai Hospital
2019
Hue Central Hospital
2019
This paper presents the design, mathematical development and experimental validation of a new vibration-driven locomotion module for capsule robots. The proposed system consists mass moving inside body mass. A nonlinear elastic spring is used to connect two masses, providing ability enhance resonant characteristics. Being excited by half-sine electromagnetic force, internal periodically oscillates thus generates locomotion. was found move effectively in expected direction under isotropic...
This article presents a new practical approach to gain better insight into the machinability enhancements of ultrasonic-assisted drilling (UAD) aluminum alloys where depth ratio is larger than 10. UAD can provide as up two times compared that conventional (CD). The material removal rate appeared higher CD by 1.5 times. total torque was considered consist three components: cutting torque, rubbing and stick-slip torque. Both magnitude in were several In contrast, such components took small...
Agricultural residues are the most abundant biomass and forage resources. Chopping is a precondition for either use, reducing shearing force has been considered as one of effective way to save energy. A smaller can also permit more compact mechanical parts chopping devices. In several cases, power consumption may be large, even when small, if corresponding cutting velocity high. Consequently, it important minimize both simultaneously. This paper presents practical approach solve...
This paper presents a new method of combining Minimum Quantity Lubricant (MQL) with ultrasonic assistance in deep hole drilling processes for difficult-to-cut materials, using internal coolant tools. A small amount lubricant as 90 mL/h was provided directly into the cutting zone during under vibrations exerted on tool. comparative experimental study implemented two types processes: conventional (CD) and ultrasonic-assisted (UAD). For each set, three different methods feeding were applied,...
This paper represents a new lubricant method which is able to one-stroke drill deep holes with length-to-diameter of 8, on the AISI SUS 304 stainless steel. By adding graphene nanosheet into typical soluble emulsion and then mixing water, nano fluid can be made. The results revealed that using nanofluid provide reduction 4.4-fold drilling torque, thus expand tool life as many 20 times, compared lubricant. proper set cutting parameters was found by Taguchi L9 experiments 550 rpm spindle speed...
This paper presents an experimental study of the positive effects vibration-assisted deep drilling aluminum alloy Al-6061. The four most important evaluation criteria in drilling—machinability, workpiece temperature, torque, and material removal rate—were chosen to be investigated. Holes with a depth-to-diameter ratio 13 were drilled by high speed steel (HSS) twist drill bits 3 mm diameter, using both methods conventional (CD) ultrasonic-assisted (UAD). Three levels axial force 6 kgf, 9 12...
This paper presents a development in design, mathematical modeling, and experimental study of vibro-impact moling device, which was invented by the author before. A vibratory unit deploying electromechanical interactions conductor with oscillating magnetic field has been realized developed. The combination resonance an RLC circuit including solenoid is found to create relative oscillatory motion between metal bar solenoid. results impacts on obstacle block, causes forward system. Compared...
In this paper, a new vibro-impact mechanism based on solenoid-actuated vibrator and its optimization are presented. The vibratory unit deploying electro-mechanical interactions of conductor with oscillating magnetic field has been realized. combination resonance in an RLC circuit solenoid is found to create oscillatory motion the metal bar within solenoid. This results impacts obstacle block. Unanimously, electromagnetic force generated acts as non-linear spring. Hence, gets created. system...
This paper presents a new approach to developing the torque model in deep hole drilling, both for conventional and ultrasonic assisted drilling processes. The was proposed as sum of three components: cutting, chip evacuation stick-slip torques. Parameters were carried out by applying regression analysis technique, with correlation values higher than 0.999. data collected from 36 experimental dry tests, cutting conditions, depth-to-diameter drilled holes 7.5. major advantage compared previous...
This paper presents an experimental study to find out effective parameter which is useful enhance the progression rate of drifting vibro-impact systems excited by a harmonic force. It assumed that system performance would be better if excitation force stays in harmonious relationship with natural motion impact mass. hypothesis has been numerically analyzed and then experimentally verified. The phase lag between mass used identify best situation, where maximal. found highest can obtained when...
We present an air-defense engagement model to counter attack by multiple antiship missiles, assuming perfect kill assessment. In this model, the probability of shooting down all incoming missiles is maximized. A generating function employed produce algorithm which used evaluate outcomes. © 1997 John Wiley & Sons, Inc. Naval Research Logistics 44: 687–697,