Linear transform has been widely used in time-frequency analysis of rotational machine vibration. However, the linear and its variants current forms cannot be to reliably analyze machinery vibration signals under nonstationary conditions because their smear effect limited time variability resolution. As such, this paper proposes a new method, named velocity synchronous chirplet (VSLCT). The proposed VSLCT is an extended version transform. It can effectively alleviate dynamically provide...

Two-dimensional transient inverse heat conduction problem (IHCP) of functionally graded materials (FGMs) is studied herein. A combination the finite element (FE) and differential quadrature (DQ) methods as a simple, accurate, efficient numerical method for FGMs transfer analysis employed solving direct problem. In order to estimate unknown boundary flux in problem, conjugate gradient (CGM) conjunction with adjoint used. The results obtained show good accuracy estimation fluxes. effects...

Accurate measurements of positions, velocities, and accelerations in both joint operational space are required for achieving accurate motion control robots. Servomotors used actuation normally equipped with position sensors optionally velocity interlink measurements. Further improvements measurement accuracy can be obtained by equipping the robot arm accelerometers absolute acceleration measurement. In this paper, an extended Kalman filter is multisensor fusion. The real-time algorithm was...

This paper presents a navigation of an autonomous robot using simultaneous localization and mapping (SLAM) in outdoor environments. SLAM is method which are done simultaneously unknown environment without access to priori map. introduces probabilistic approach problem under Gaussian non-Gaussian conditions offers alternative solutions. First, extended Kalman filter algorithm for the condition will be shown. Also, way dealing with assumption called FastSLAM analyzed. that Rao-Blackwellised...

This paper compares two commonly used algorithms to solve Simultaneous Localization and Mapping (SLAM) problem in order safely navigate an outdoor autonomous robot unknown location without any access a priori map. EKF-SLAM is considered as classical method SLAM problem. method, however, suffers from major issues; the quadratic computational complexity single hypothesis data association. Large number of landmarks environment, especially, nearby landmarks, causes extensive error accumulation...

This paper investigates nonlinear forced vibrations of homogeneous Euler-Bernoulli microbeams with clamped-clamped boundary conditions. Here, the nonlocal strain gradient theory is incorporated to achieve governing partial differential equation motion, including mid-plane stretching and damping effects. Using Galerkin approach, a reduced motion derived under central harmonic force. The perturbation technique employed examine vibration behavior microbeam. Frequency responses microbeam are...

This paper describes the evolution of teaching electrical engineering to mechanical students based on motivation and a pedagogical strategy incorporating interdisciplinary mechatronics projects in learning studio environment. Implementation student within curriculum has been demonstrated be highly motivational educational even evolved from "play learn" into industry-inspired green energy applications as platform for multiple competitions. Several examples successful are discussed. These...

Presents model predictive control (MPC) of an autonomous vehicle. Simulation and experimental results are shown compared with input-output linearization method. The obtained show that the MPC is efficient method allows for accurate navigation Model based tested in simulations motion on inclined plane. This done to prepare future work regarding avoidance violation smoothness condition exact linearization, while at same time by modifying input commands geometric path planning conserved....

A smart fire detection system is a necessary part of manufacturing facility. Autonomous robots may be deployed to seek out potential source in the industrial environment, approach, investigate and declare presence or absence based on several sensor fusion techniques. novel approach above mentioned topic described this paper. new technique, introduced as "Modified Voting Logic" explained. The robot uses readings comparison obstacle avoidance avoid obstacles together with Modified Logic threat.

The objective of this paper is to present an approach for processing infrared images and accomplishing automatic detection path tracking moving subjects with fever. based on two main features: the distinction between geometry a human face other objects in field view camera temperature radiating object. These features are used identified persons position respect direction motion walkers appeared be critical process. Infrared thermography remote sensing technique measure emitted radiation,...

A flexible-cable overhead crane system having large swing is studied as a multi-degree underactuated system. To resolve the dynamics complexities, second order singular perturbation (SP) formulation developed to divide into two one-degree fast and slow subsystems. Then, control designed based on two-time scale (TTSC) method to: (a) transfer payload desired location decrease swing, by nonlinear controller for dynamics; (b) suppress transverse vibrations of cable, linear dynamics. The an...

Abstract This study is concerned with the design of a nonsingular decoupled terminal sliding mode controller for class fourth-order under-actuated uncertain nonlinear systems unknown external disturbance. For unmeasured disturbance, disturbance observer finite-time convergence estimation error to zero proposed. The designed by utilizing output proposed observer. Also, an input saturation constraint and control singularity are considered in design. stability proved closed-loop system. In...

Time–frequency analysis is widely used in the field of machinery condition monitoring and fault diagnosis under nonstationary conditions. Among time–frequency methods synchrosqueezing transform outperforms others providing fine-resolution representation. However, it suffers from smear when analysing signals. To address this issue, paper proposes a new synchrosqueezing-transform-based method which works by (1) mapping raw vibration signal into corresponding stationary angle domain to meet...

This paper analyzes several control schemes for nonholonomic vehicles (mobile robots with differential rear wheels) in stabilization and leader - follower manoeuvres. Extensive simulation studies have been conducted to evaluate the performance of existing test new suggested this paper. The results nonholomic show that polar coordinates is effective a variety initial conditions follower, both tracking.