Research On The Control System Of Three-Axis Electric-Driven Simulator

Flying posture simulator is the half real object imitating equipment which has important significance to national defence and economics. Its performance is relative to the fidelity of simulation results directly.As the development of the cause of the spaceflight and the construction of the national construction, the requirement of the performance of the imitating equipment is increasing everyday. The dissertation takes the developing three axes drive simulator as researching background,and researches the design and realization of the system. The work has important significance in improving the frequency response and dynamic servo precision of the simulator servo system.Along with the development of electronic and electrical technology, the improvement of control technique for Brushless DC Torque Motor (BLDCTM) makes it finds more and more applications in high performance servo fields. It gives the technical feasibility of the development of the three-axis simulator. From the priority of the BLDCTM, so the dissertation comes up with the scheme that applying the BLDCTM as the driver in this equipment. And made some study of the control system of the three-axis simulator.The paper finished the whole project design of the system of the three-axis simulator by the analysis of the technical requirement of the three-axis simulator. The author considered the distortion of the structure, the rigidity, the inherent frequency of the system, the functional requirement of the equipment and the realization in the engineering. The paper comes up with the scheme with the multi-close loop control strategy, and finished the design of the component of the system.The paper set up the mathematical model of the position control system of the three-axis simulator based the mode of the component of the control system and make the good preparation for the analysis of the performance of the control system in the Flying posture simulator. The paper also made the study of the control strategy of PID by the design of the parameter of the current loop, velocity loop, and the position loop. The paper also analyzed the stability of the position control system based the mathematical model, and the position accuracy of system from the influence of the tolerance of the stability.The paper induced the differential feed-front and interruption compensation to form the compound control system based on the digital control strategy of digital PID. The paper makes the simulation of the position control system of the Flying posture simulator took the advantage of the priority of the feedback and feed-front. The paper analyzed the principle of the interruption compensation based the invariable principle, and presents the design rule of the controller in the engineering. It offers quite theoretical basic to study the control system of the electromotion three-axis simulator.The author prove the feasibility of the design of the control system by the test-experiment on the ground of the theoretical analysis and the simulation. and made the test of the angle-position accuracy, the angle-position repetition and the angle-velocity stability.The experimental result indicates that the three-axis simulator meets the need of designing. So it proves that the control strategy is practicability and validity.