International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

Modern mobile phones with advanced functionality, known as smartphones, have many applications. A triaxial accelerometer is used to determine the current position of the smartphone in space and therefore the screen orientation. It is known that accelerometers are used to determine important operational properties of vehicles, such as dynamics and acceleration. In this regard, the purpose of this paper is to study the possibility of using a smartphone to measure the vehicle acceleration.

This paper describes the activity system and the importance of INS with the possibility of implementation to the robot control. The contribution also introduces the execution of DC motor regulation utilized for the positioning of a rotary positioned arm. The motor control comprises the current regulation, angular velocity and the rotation of the motor shaft fixed to the arm regarding the required angular change course of the arm rotation. The regulation structure of the DC motor is carried out in MATLAB/Simulink program. The arm movement is investigated via the mathematical model and virtual dynamic model formed in MSC.ADAMS program.

The paper presents concepts related to analysis of mechanical vibrations of a squirrel-cage induction motor. It describes an experimental approach using piezoelectric accelerometer and analog/digital data acquisition tools. The influence of powering the motor with an inverter on vibration harmonic content is presented and different PWM switching frequencies are compared to regular line supply.

High-speed crafts’ reliability as well as its passenger’s comfort and safety are closely related to the craft’s dynamics on sea waves. The resultant dynamics are governed by the quality of the motion control system and its capacity for quality kinematic data acquisition. Herein, we propose a novel method for determining accelerometers’ mounting positions within a hydrofoil ship. This method eliminates interference from the output of accelerometers and provides the capability of determining the amplification coefficients of the second derivative with respect to the height of the ship’s motion.