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CALCULATION OF DIGITAL TRACKING SYSTEMS OF COMBINED CONTROL USING A LIMITING CONTINUOUS MODEL. PART II. CALCULATION OF THE DIGITAL TRACKING SYSTEM

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The specified indicators of stability and speed of the digital tracking system are proposed to afford with a certain small margin in its limiting continuous model using the methods of synthesizing linear continuous systems. Meeting the specified requirements for the digital tracking system can be ensured by choosing a sufficiently high frequency of the system mismatch calculating. If an unacceptably high frequency is obtained, it is possible to fulfill the specified requirements in a limiting continuous model with a larger margin, which will reduce the necessary frequency for calculating the mismatch of the real tracking system. The effect of changes in the parameters of digital tracking system on its dynamic accuracy is considered. Deviations of the discrete filter coefficients from the required values are determined with changes of the system parameters causing speed and acceleration errors. To mitigate the effect of changing parameters on dynamic accuracy, it is proposed to use negative feedbacks on speed and acceleration with constant parameters and to stabilize the value of the conversion coefficient of the continuous part.

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