Limit cycle oscillation-based rapid friction identification method of electromechanical servo system

• Main Authors: YANG GUANG, LIU SHENG, RAN CHENGPING, ZHANG XINYONG, YANG YUANQIANG
• Format: Patent
• Language: Chinese; English
• Published: 15.03.2017
• Subjects: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention relates to a limit cycle oscillation-based rapid friction identification method of an electromechanical servo system. The method comprises the steps of firstly, respectively describing a linear model of the electromechanical servo system and an unknown friction module of a parameter by mathematical expressions; secondly, enabling the system to generate self-oscillation by adjusting gains of two relays, and measuring data of periodic motion; and finally, performing arithmetical operation according to a principle formula obtained by a harmonic balance condition, and calculating the parameter of the friction model. By the method, the friction model of the electromechanical servo system can be rapidly and accurately identified, a mathematical model can be provided for design of the servo control system, and the design efficiency of the electromechanical servo system is improved. Since the method is small in computation, an excitation signal is not needed to meticulously design, and the method is con