# Research on Space Maglev Vibration Isolation Control System Modeling and Simulation
## 4 System Testing and Calibration  
### Composition of Testing and Calibration System  
The testing and calibration system mainly includes a multi-degree-of-freedom, high-precision coil spatial pose automatic positioning platform, a robust magnetic structure with a strong uniform magnetic field magnetization and integrated assembly testing platform, a multi-channel ultra-high-precision real-time driving current measurement system, a multi-directional large-span ultra-high-precision force performance measurement system, a testing control and data analysis processing unit, etc.  
The functions of each part of the testing and calibration system are as follows:  
1. Multi-degree-of-freedom, high-precision coil spatial pose automatic positioning platform.  
Mainly used to control the relative pose of actuator coils in a magnetic field, including a three-degree-of-freedom automatic position positioning platform and a three-degree-of-freedom automatic angle table. It can simulate the relative pose of coils in different states of six degrees of freedom in space at most.
2. Strong magnetic structure, strong uniform magnetic field, and integrated assembly testing platform.  
Figure 12: The variation curves of current.  
Figure 13: The variation curves of electromagnetic force.  
To ensure high linearity of actuator force output performance, it is necessary to have strong uniform magnetic field characteristics. The strong magnetic structure charging and demagnetization and integrated assembly testing platform is mainly used for the strong uniformity charging and demagnetization process of high-performance magnetic steel (such as neodymium iron boron N52, etc.), high-precision integrated assembly of strong magnetic structures, and magnetic field performance testing and calibration.  
Multi-channel, ultra-high-precision, real-time driving current measurement system.  
The accuracy of the current drive is the key to ensuring the accuracy of actuator force output, and its output testing accuracy directly affects the force output performance. The current sensing detection needs to enter the testing loop, so it also needs to have ultra-high precision real-time data acquisition and transmission functions.  
The multi-directional large-span ultra-high-precision force performance measurement system is the core component of the entire testing system.  
Ultra-high-precision force performance measurement specifically includes: (a) selection and matching of ultra-high-precision multi-directional force sensors; (b) design of ultra-high-precision force measurement scheme, sensor layout, and force performance testing, compatibility design between high-force values and ultra-high-precision testing requirements, micro-vibration isolation of the measurement system, etc.  
Test Control and Data Analysis Processing Unit  
The testing control and data analysis processing unit is the center of the operational control and data post-processing analysis of the testing calibration system. Its main functions include high-precision positioning control of the coil spatial pose; real-time acquisition and storage of multi-channel current drive and multi-directional multi-channel output force information; automatic fitting calibration of batch sampling data and comprehensive performance analysis of actuators.  
The main testing items are shown in the table below (Table 6).