Comments on ‘‘Design of aluminium boom and arm for an excavator”

This paper comments on the recently published work dealing with the problem in the design of the backhoe excavator working device. It also includes remarks on the inadequacy in the problem approach to the device weight optimization and synthesis, and highlights mistakes in the mathematical model. This work points out the demand for a much wider approach to the optimization problem of the backhoe excavator working device.

► Neither the the objective function nor the constraint functions are presented.
► The optimization problem could not be successfully solved by studying single panel.
► The mathematical formulations presented include considerable mistakes.
► The paper does not give any solution to the working device parts’ torsion problem.
► Change of mass impact on the working device response is not considered.