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:  113
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:  2025
:   .., .. // . - 2025. - . 113. - .73-94.
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(.):  two-link manipulator, endpoint position control, tracking, inverse kinematics problem, external disturbances, block approach
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(.):  For a two-link manipulator endpoint, we consider the problem of tracking the desired trajectory defined on a plane in the endpoint workspace under the action of external disturbances. These perturbations are assumed to be matched (acting along the same channels with the controls, which are considered to be generalized torques). Standard approaches to control rely on the solution of the inverse problem of kinematics, which can be ambiguous and, as a rule, requires the use of numerical methods. Given these drawbacks, the problem of developing control laws without solving the inverse kinematics problem is relevant. To create such an approach to control, we consider the coordinates of the endpoint in the Cartesian system as output variables. Then, on the basis of the unambiguous dependence of the output on the generalized coordinates, we can transform the initial description of the system in terms of generalized coordinates to a description in terms of the endpoint positions and solve the problem of control synthesis on the basis of the transformed system. The control is constructed using the block approach, which allows us to divide the problem into two subproblems of synthesizing virtual and true controls in fully actuated subsystems. For comparative analysis, we also developed a method for synthesizing control torques, which involves solving the inverse problem of kinematics. In both methods, smooth and bounded S-shaped feedback is used, which suppresses disturbance with a given accuracy and monotonicity of transients. Numerical simulation results are presented to confirm the effectiveness of the proposed approach without solving the inverse kinematics problem.

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