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Variable structure system control is a rapidly developing no-linear controller design method. It provides attractive features such as fast response and insensitivity to variation in plant parameters. In this work a new reaching law with constant plus integral rate is used to design a variable structure con trolled. This controller was experimentally tested in the digital position control of a DC servomotor. The addition of integral rate to the reaching law. with the proper selection of its parameters. improves the tracking accuracy and the robustness of the variable structure controller.