Development and research of the control system of the electric drive of panoramic windscreen wipers

BACKGROUND: The issue of coordinated control of vehicles’ windscreen wipers, not linked to each other with mechanical joints, is related to aiming to make the equipment more compact. Modern microprocessor controlling are helpful to solve this issue with use of electric drive as well as problems of logical control and interaction with high-level controlling equipment.

AIMS: The comprehensive solution of the issue of coordinated control of movement of panoramic windscreen wipers without mechanical links as well as the solution of secondary problems of control with use of tools of electric drive considering various factors.

METHODS: The algorithm of windscreen wipers movement coordination in nontracking system of automatic stabilization of electric motors rotation velocities with positioning in trajectories’ control points. Among the factors, necessary to consider in development, there are design of mechanism of windscreen wipers, the characteristic of mechanical load on them, type and location of sensors, required dynamics and accuracy of coordinates adjustment, behavior of electromagnetic processes in power converter and restriction of computing capabilities of a microcontroller.

RESULTS: The electric drive ensures visually balanced coordinated movement of windscreen wipers, which is resistant to load change caused by the condition of the windscreen as well as torques of gravity force acting on the windscreen wipers. The logical control based on discrete switches ensures selection of the movement mode, whereas the connection through digital circuits ensures data exchange with the controlling equipment. Technical solutions ensuring simple tuning of the electric drive are implemented.

CONCLUSIONS: The given solution of issues of coordination of windscreen wipers movement, automatic adjustment of coordinates considering dynamics of movement control, logical control and coupling with the high-level controlling equipment has practical value for development of various control systems.