dynamic model

Influence of wheel rotation resistance on oscillatory phenomena in steering drive of electric bus with electromechanical amplifier

Steering systems with an electromechanical amplifier (EMA) are a modern design solution compared to hydraulic and electro-hydraulic steering systems. Hydraulic steering amplifiers are used in the steering drives of modern trolleybuses and electric buses. If an electric motor powered from the power grid is used to drive the hydraulic pump in trolleybuses, then in electric buses, the source of electrical power is rechargeable batteries. Energy consumption to ensure the operation of the hydraulic power steering reduces the mileage of the electric bus between charging the batteries.

Influence of vehicle acceleration intensity on dual-mass flywheel elements and transmission load

Modern high-torque low-speed internal combustion engines (ICEs) generate torsional vibrations close in disturbance frequency to gearboxes natural oscillation frequencies. Effective absorption of such oscillations requires a new torsional vibration damper between the internal combustion engine and gearbox design, which is implemented in the form of a dual-mass flywheel (DMF). One of the main reasons for DMF failure is its spring components destruction.

Review and complement of methods for changing the movement speed of mechanisms and machines elements

In mechanical drives of machines there is a need to control changes in the speed of their actuators. Stepped and stepless gearboxes are used for this purpose. Known speed control devices have many disadvantages that adversely affect the durability and reliability of drive components and machines in general. These include the design complexity, high material consumption, automation complexity, dynamic loads during transitions from one speed to another, intensive wear of parts due to the friction connections use.

Influence of transportation object position in car body on its vibrational loading

Dynamic model for research of object transportation location influence on its vibrating loading by moving through a number of single obstacles, road with random microprofile and rough road is offered. Differential equations and methods of their integration in MATLAB Simulink software product are presented. The values of frequencies and amplitudes of vertical oscillations, vibration acceleration of the transportation object at different locations in the vehicle body were obtained.

Simulation development of the basic elements of cable devices with the mobile pulling-carrying rope

The scheme of a universal towing device is developed and the dynamic model for the calculation of the main parameters of the device is suggested. An equation of motion of a pulling-carrying rope and a towing mechanism is suggested taking into account the efforts of the resistance movement and stiffness of the individual elements of the cable installation. The dependancies for the determination of installing and maximally permissible tension of a rope are obtained. Practical recommendations for the selection of key parameters of a towing device are worked out.

Dynamic and mathematical models of vibro-hammer with electrohydraulic control

The article presents the requirements imposed on a vibro-hammer drive with an electrohydraulic control system and the ways to support them. The process of gradual drawdown complex is described, on the basis of which, a simplified dynamic model and its further solver, such as a system of equations, are built. The results of mathematical research are also presented.