An observer-based fixed-time position tracking strategy for DC torque motor systems. (August 2020)

• Record Type: Journal Article
• Authors: Li, Guofei; Wu, Yunjie; Xu, Pengya
• Is Part Of: Mechanical systems and signal processing. Volume 142(2020)
• Publication Date: 2020-08
• Subjects: Position tracking -- Fixed-time control -- Extended state observer -- DC torque motor; Structural dynamics -- Periodicals; Vibration -- Periodicals; Constructions -- Dynamique -- Périodiques; Vibration -- Périodiques; Structural dynamics; Vibration; Periodicals; 621
• DOI: 10.1016/j.ymssp.2020.106774
• Languages: English
• ISSNs: 0888-3270

Abstract

Highlights: In this paper, we present the fixed-time control method for position tracking of DC torque motor system. A novel fixed-time control strategy is proposed in this paper by employing two power state feedback parts to work separately with continuous transition, such property is effective in saving the control effort. A fixed-time extended state observer is designed to estimate the total disturbance in DC torque motor system. Abstract: The position tracking problem is investigated in this paper for DC torque motor system. A novel fixed-time control strategy is presented, the structure of which can be adjusted with continuous transition. A fixed-time extended state observer is designed to estimate the total disturbance. The proposed observer-based controller renders the position of DC torque motor track the desired signal in fixed time. Both disturbance observer and position tracking controller are fixed-time convergent. The bound of setting time can be determined regardless of initial states. Numerical simulation and experiment are carried out to validate the effectiveness of the proposed strategy.