双惯量弹性系统负载扰动观测器设计研究

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Abstract High stiffness control in servo system can effectively suppress the dynamic disturbance phenomenon by load variation.Based on the motor model,state-feedback observer can provide the load information quickly and accurately for disturbance rejection.But strong disturbance rejection ability will cause mechanical resonance phenomenon with the finite elasticity of the connecting device easily.To solve this problem,the contradiction between anti-resonance and anti-disturbance is studied.On the basis of keeping disturbance rejection ability,a control algorithm is adopted in this paper based on state-feedback observer.It use fractional order disturbance observer(FO-DOB) to build the state-feedback observer up,which can suppress speed and torque fluctuation caused by the mechanical resonance.Fractional order filter will maximize the extent of the filter selection range and coordinate the robustness and anti-resonance ability.Consequently,the algorithm can suppress speed and torque fluctuation caused by the mechanical resonance and enhance the anti-disturbance ability of the system.The effectiveness of the proposed algorithm is verified by simulation.

Key words： Mechanical resonance disturbance rejection two-mass system state-feedback observer

Received: 22 August 2016 Published: 23 March 2017

PACS:

TM341

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	Lang Zhi
	Yang Ming Xu
	Dianguo

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Lang Zhi,Yang Ming Xu,Dianguo. Mechanical Resonance Suppression and Disturbance Rejection of Two-Mass System Based on State-Feedback Observer[J]. Transactions of China Electrotechnical Society, 2016, 31(增刊2): 84-91.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I增刊2/84

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