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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2021, Vol. 42 ›› Issue (9): 224652-224652.doi: 10.7527/S1000-6893.2020.24652

• Solid Mechanics and Vehicle Conceptual Design • Previous Articles     Next Articles

SMA bump hysteresis modeling and control strategy

CHEN Xuliang, ZHANG Chen, JI Hongli, QIU Jinhao   

  1. State Key Laboratory of Mechanics and Control of Mechanical Structures, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2020-08-18 Revised:2020-11-11 Published:2020-12-08
  • Supported by:
    National Natural Science Foundation of China (11532006 & 51775267); Natural Science Foundation of Jiangsu Province (BK20181286); Equipment Pre-Research Foundation (61402100103); A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions

Abstract: Shock Control Bump (SCB) is a flow control method for shock drag reduction. To solve the problem of the narrow working range of the fixed deflection bump, we propose a Shape Memory Alloy (SMA) bump with two-way memory effect to change deflection by controlling the temperature. The maximum recoverable displacement of the SMA bump is 6.1 mm, which is 2.65% of the deformation area of the bump. To reduce the influence of the hysteresis when controlling the deflection, we use the Krasnosel'skii-Pokrovskii (KP) model to model the temperature/deflection hysteresis of the SMA bump. The particle swarm algorithm is adopted to identify the parameters of the hysteresis model. The maximum error of the identified hysteresis model is 0.107 mm. Two PID control schemes based on the KP model are designed, one being single-target PID control without hysteresis compensation, and the other being dual-target PID control with the hysteresis inverse model feedforward compensation. Simulation and experimental results show that the time-domain performance of the dual-target PID control with the hysteresis inverse model feedforward compensation is better than the single-target PID control without hysteresis compensation.

Key words: shape memory alloy, hysteresis modeling, Krasnosel'skii-Pokrovskii (KP) model, shock control bump, PID control

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