Dynamic Loads in Kinematic Transmissions With Liuft at the Optimum Control of the Mechanism of Turning
Year: 2018
Type: article
Abstract: With the purpose of increasing the productivity of many technological processes, optimal control of an asynchronous electric drive of turning mechanisms by the criterion of speed and simultaneousdamping of cargo fluctuations is considered. The law of change of the dynamic moment of the electric driveobtained with the use of Pontryagin's maximum principle ensures the damping of the load oscillations by theend of the transient process of the rotation mechanism and the minimum duration of these processes. How-ever, this requires not smooth, but instantaneous applications of maximum torque, which leads to the greatest dynamic loads in the transmission links. Dynamic loads in kinematic gears with a clearance under theoptimal control of the rotation mechanism are investigated. It is shown that when the engine is reversed,even without taking into account the play in gears, the dynamism coefficient essentially depends on the initialconditions. Processes are aggravated by the presence of gaps in the kinematic transmissions of the mechanical part of the electromechanical system. It is shown that by changing the motor torque according to an exponential law, it is possible to achieve a significant reduction in loads in kinematic gears. However, withlarge gaps, even under these conditions, the loads in the gears can be unacceptable. Therefore, it is desirable so to contain the mechanical part of the rotation mechanism, so that the total value of the gap in thetransmissions does not exceed 1 to 1.5 rad. It is shown that taking into account viscous friction gives an additional reduction in loads, and deviation of the control method from the ideal has an insignificant effect onthe quality indices of the optimal transient processes of the electromechanical system.
Source: ELECTRICAL AND COMPUTER SYSTEMS
Author: E. V. Naidenko
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2886007809