Анализ точности работ, производимых рабочим механизмом одноковшового экскаватора

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Анализ точности работ, производимых рабочим механизмом одноковшового экскаватора
Инженерный журнал: наука и инновации # 8·2017 13
Accuracy analysis of earthworks performed by shovel
working mechanism
© E.O. Podchasov, A.D. Terenteva
Bauman Moscow State Technical University, Moscow, 105005, Russia
In civil engineering, when laying trenches for urban communications in infill construc-
tion, there is a need to use high-precision construction machines equipped with control
systems. The most promising are the machines built on adaptive methods, since they
make it possible to synthesize the control algorithm in the work process. The need for
such systems is due to the high requirements to performing excavation works, established
by construction norms and rules. A significant proportion of the work on constructing the
communications is carried out using a shovel excavator with a hydraulic drive. To ob-
tain practical recommendations for improving the accuracy and application of control
systems, a mathematical model of the operating mechanism of a shovel excavator has
been developed. This model allows us to estimate the accuracy of excavation, analyze
possible sources of geometric errors and make up a working area and service area. The
developed model makes it possible to analyze the kinematic and technological errors and
the sources of their appearance. We propose two ways to reduce the errors to acceptable
limits, either using the control system or without using it on existing equipment.
Keywords: shovel excavator, mathematical model, automatic control system, service
zone, precision
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