FIELD: construction.;SUBSTANCE: device consists of a control unit and an angle measurement unit with the former calculating the lifting arm position coordinates based on the angle measurement data to have been collected and exercising control over varied drive mechanisms accordingly. The device is additionally equipped with a remote control unit that broadcasts wireless remote control commands to support control over translocations. The directional control command consists of X-axis component, Y-axis component and Z-axis component referenced to a rectangular coordinate system with the rectangular coordinate system plotted within a space where its X, Y and Z axes correspond to each of the axial components of the directional control command of the remote control unit. When the remote control unit conveys a directional control command the control unit defines the lifting arm end in-plane relocation direction relying on the X-axis component, the Y-axis component and the Z-axis component of the directional control command to have been received and decomposes the total transposition into a sum of motions of specific arm sections and the rotating platform so that the lifting arm end become relocated exactly in the direction assigned by the control command.;EFFECT: rectilinear control over the lifting arm end relocation trajectory.;23 cl, 12 dwg
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