Bing Li, Haiyang Jin, Min Fang, Ying Hu, Peng Zhang
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Spinal physiological motion simulator and compensation method for a robotic spinal surgical system
During spinal surgery, spinal physiological motion (SPM) due to respiration can interfere with the operation. The patient is anesthetized and breathes passively with the aid of a respirator, causing periodic SPM. In this paper, a respiratory model based on the respirator flow waves is proposed; and a spinal physiological motion simulator (SPMS), which is based on a 3-RPS parallel mechanism, is developed for simulating the SPM due to the respiratory model. For compensating the SPM, a compensation algorithm based on weighted frequency linear combiner (WFLC), which can adapt to variation in the frequency and amplitude of a quasi-periodic signal, is used for a robotic surgical system in this paper. And finally, two experiments were carried out, one is to analyze the SPMS error and the other is to validate SPM compensation using the compensation algorithm.
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