Dynamics of a double integration subordinate speed control system closed via a state observer

摘要

A new method of improving the operational precision of a double-integration subordinate speed control system (SSCS) is proposed, which involves increasing the order of astatism with respect to the disturbances by introducing a state observer ofthe full order into the feedback system of the motor current and speed. The method ensures zero area of speed control with a step-by-step change of the disturbing signal as well as ellminating the static and speed errors with respect to the disturbingaction. It is shown that the incorporation of a reduction observer of the second order into a double-integration SSCS results in a decrease in static error more than two orders of magnitude larger then in the case of application of a single-integrationSSCS. Results of modelling of electric drives are given together with a large number of examples illustrating an engineering method of synthesising state observers of full and lower orders.