Transaction on Control and Mechanical Systems 

About: Transaction on Control and Mechanical Systems is an academic journal. The journal publishes majorly in the area(s): Robot & Finite element method. It has an ISSN identifier of 2345-234X. Over the lifetime, 102 publications have been published receiving 270 citations.

Structural and Contact Analysis of Disc Brake Assembly During Single Stop Braking Event

Abstract: An automobile disc brake system is used to perform three basic functions, i.e. to reduce speed of a vehicle, to maintain its speed when travelling downhill and to completely stop the vehicle. During these braking events, the disc brake may suffer of structural and wear issues. It is quite sometimes that the disc brake components fail structurally and/or having severe wear on the pad. Thus, this paper aims to examine stress concentration, structural deformation and contact pressure of brake disc and pads during single braking stop event by employing commercial finite element software, ANSYS. The paper also highlights the effects of using a fixed calliper, different friction coefficients and different speeds of the disc on the stress concentration, structural deformation and contact pressure of brake disc and pads, respectively.

Utilization of Whale-Inspired Tubercles as a Control Technique to Improve Airfoil Performance

Abstract: This research exploits the Whale-inspired tubercles as a control technique to improve the performance of airfoils. The flow field of NACA0012 airfoil with spherical leading-edge tubercles was computationally simulated. This airfoil section resembles the flipper of the Humpback whale and is used in many engineering applications. Tubercles, with a diameter of 10% of the airfoil chord (C), are arranged such that the span-wise distance between the centerlines of two adjacent tubercles is 20% C. k- turbulence model was used for a wide range of angle of attack (α = 0 o - 25 o ) and Reynolds number (Re = 65,000 - 1,000,000). Results demonstrated that the presence of tubercles improves the airfoil performance by delaying or even preventing stall in the investigated range of operating conditions (α and Re). Simple active control scheme is proposed to obtain optimum performance (i.e., optimum values of lift and drag coefficients).

Data–driven Modelling of a Wind Turbine Benchmark for Fault Diagnosis Application

Abstract: In order to improve reliability and safety of wind turbines, it is important to detect and isolate faults as fast as possible, and handle them in an optimal way. This work describes a data–driven modelling approach oriented to the design of a diagnosis scheme, used to detect faults, and isolate them as early as possible, in order to avoid possible catastrophic consequences. A hybrid modelling approach is used here since the model under investigation is nonlinear, whilst the wind speed measurement is uncertain since it is influenced by the turbulence around the rotor plane. The modelling method relies on piecewise affine prototypes, which are identified from the noisy measurements acquired from the simulated wind turbine. The fault detection and isolation strategy is thus designed based on these hybrid models. The wind turbine simulator is finally used to validate the achieved performances of the suggested fault diagnosis scheme.

Design and implementation of a biomimetic wire-driven underactuated serpentine manipulator

Abstract: Inspired by the snake skeleton and octopus arm muscle arrangement, we designed and built a wire-driven underactuated serpentine robot arm The robot arm is made of a number of rigid vertebras, which is controlled by two sets of wires The chained vertebras make up the backbone while the wires together with the servo motor work as the muscle The robot arm has two bending degree of freedom (DOF) An elastic tube is used to confine the joint rotation By the piece wise constant curvature assumption, forward and inverse kinematics is developed by geometry analysis and D-H method Trajectory of the end effector is a spheroidal surface A prototype is built to validate the design The positioning error of the designed robot arm is related to the overall length of the flexible part The longer the bending section, the larger the error For the prototype, the positioning error is less than 2% The robot arm is highly flexible It remains controllable when obstacles are present This manipulator is well suited for working in confined space, especially for engineering or medical inspection

CFD Simulation of Fuselage Aerodynamics of the "ANSAT" Helicopter Protype

Abstract: This paper investigates the aerodynamic lift and drag of the ANSAT helicopter fuselage prototypes using Computational Fluid Dynamics. The CAD model of the fuselage was meshed using an unstructured grid and computed using a viscous flow model under the assumption of steady flow conditions. To account for the influence of the helicopter rotor an actuator disk model was used and the results were compared with computations for the isolated fuselage. The contributions to the total drag of the individual helicopter fuselage components were also studied using different turbulence models. The key components of the fuselage drag were identified.