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Electromechanical systems usually have an innate backlash in their gear trains which is normally nonlinear and limits the performance of the system. In this paper, a disturbance observer is designed in order to estimate the properties of the backlash. Generally, such disturbance observers are designed with the inverse model of the nominal plant but since the backlash is an internal factor of the plant,...
The methods of implementation of disturbance observer for compensating backlash and rejecting the noise are addressed in this paper. The disturbance observer is designed with the inverse model of the plant and Q-filter. In the realization of the disturbance observer, some problems, which are measurement noise caused by encoder, reduction and discretization of disturbance observer, should be considered.
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