Velocity control apparatus

专利名称：Velocity control apparatus发明人：Mitsuo Kurakake,Keiji Sakamoto申请号：US07/231851申请日：19880728公开号：US04885515A公开日：191205

摘要：A velocity control apparatus according to the invention is used in order toacccept feedback data, for velocity control of a servomotor or the like. The disclosedapparatus provides velocity information in the form of discrete data from a pulse coderor the like, and forms a prescribed control command by digitally processing the data in amicroprocessor. In a case where the above mentioned data are sampled at apredetermined sampling rate during a processing period so as to accommodateprocessing by the microprocessor, a lag element results when the data are acceptedwithin the computer as velocity information which causes an inaccuracy in servomotorcontrol. Accordingly, a detection signal forming unit (5) processes the discrete count dataas the sum of count data synchronized to the sampling rate which is the processingperiod subdivided into a fraction, in which fraction the denominator is an integer. Thedetection signal forming unit (5) supplies a velocity processing block (3b) with velocitydata, at the predetermined sampling rate, as the latest velocity data. Thus, the influenceof the lag element can be reduced to a great extent and the capability of the

microprocessor can be made to fully manifest itself, thereby enabling accurate velocitycontrol.

申请人：FANUC LTD.

代理机构：Staas & Halsey

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