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Journal of Projectiles, Rockets, Missiles and Guidance >

2024 , Vol. 44 >Issue 5: 47 - 53

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2024.05.006

Research on High-precision Control of the Indexing Mechanism of the Rotary Modulation Inertial Navigation System

  • ZHENG Xianrun 1 ,
  • HU Rui 1 ,
  • LIANG Ganggang 2 ,
  • SUN Yafei 1
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  • 1 The 43rd Research Institute of China Electronics Technology Group Corporation, Hefei 230093, Anhui, China
  • 2 Xi’an Modern Control Technology Research Institute, Xi’an 710065, Shaanxi, China

Received date: 2023-08-05

  Online published: 2024-12-18

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Abstract

To meet the high control precision requirements of the resolver of advanced rotating modulation inertial navigation systems, and to address the limitations of traditional PI control in balancing dynamic response and steady-state error, a fuzzy-PI composite control method with saturation correction is designed. This method is arranged on the position loop of a traditional three-loop control system, taking the position error and the rate of change of position error as inputs. Configuring reasonable control strategies under different states, it can combine the advantages of both fuzzy control and PI control, and achieve precise system adjustment. Meanwhile, the incoming saturation correction technology can effectively suppress the excessive accumulation in the PI controller's integral term, so as to reduce the potential cumulative error during long-term operation and enhance system stability and control accuracy. This control method has been used on a certain model of gimbaled rotating inertial navigation device and performs well. The actual test results show that the steady-state accuracy of the system can be stably controlled within ±5″, and the response time can be controlled within 5 seconds, and it can meet the requirements of high-precision rotating position control.

Key words： rotation modulation; high-precision control; fuzzy PI control; saturation correction; brushless DC motor

Cite this article

ZHENG Xianrun , HU Rui , LIANG Ganggang , SUN Yafei . Research on High-precision Control of the Indexing Mechanism of the Rotary Modulation Inertial Navigation System[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2024 , 44(5) : 47 -53 . DOI: 10.15892/j.cnki.djzdxb.2024.05.006

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