Pendulum type accelerometer closed-loop control system and method based on speed feedback principle

Abstract

The invention belongs to the technical field of closed-loop control of accelerometers, and particularly relates to a pendulum type accelerometer closed-loop control system and method based on a speed feedback principle. The system comprises a speed detection unit, a displacement detection unit, a signal pickup and demodulation unit and a force feedback execution unit, wherein the speed detection unit and the displacement detection unit are connected with the signal pickup and demodulation unit, the signal pickup and demodulation unit is connected with the force feedback execution unit, and closed-loop control of the accelerometer system is achieved. According to the control method, the displacement signal and the speed signal of the accelerometer pendulum assembly are detected and utilized at the same time to participate in the control algorithm, so that high-speed measurement of the flexible pendulum type accelerometer under the high dynamic condition is achieved.

Description

technical field [0001] The invention belongs to the technical field of accelerometer closed-loop control, and in particular relates to a pendulum accelerometer closed-loop control system and method based on the principle of speed feedback. Background technique [0002] As one of the core components in the inertial navigation system, the accelerometer provides acceleration information for the system, and its accuracy directly affects the accuracy of the navigation system. At present, high-precision accelerometers at home and abroad basically adopt the closed-loop control mode, that is, by detecting the offset of the pendulum component inside the accelerometer, a feedback control signal is provided, and after calculation and demodulation, the drive is controlled to pull the pendulum component back to the equilibrium position. So as to realize the measurement of high-precision acceleration. The closed-loop control accelerometer, because it can bind the pendulum component near ...

AI Technical Summary

Problems solved by technology

Its defect is that it relies on complex sampling, data processing devices and algorithms, which is very complex, and under complex vibration conditions, it cannot give accurate compensation, which greatly limits its application field

Theoretically speaking, there is always a hysteresis effect to control the acceleration through the detection of the displacement. Even if a more complex control system is designed, the existing problems can only be slightly improved, and cannot be fundamentally solved.

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