Safe limiting method for vector adjusting mechanism

Abstract

The invention provides a safe limiting method for a vector adjusting mechanism. Firstly, the current angle error of the vector adjusting mechanism is calculated, and then the needed displacement of asliding block of the vector adjusting mechanism is obtained; then the single-time maximum moving distance and the soft limitation range of the sliding block of the vector adjusting mechanism are obtained, and the displacement of the sliding block of the vector adjusting mechanism is corrected; and finally, according to the corrected displacement of the sliding block of the vector adjusting mechanism, moving of the sliding block is controlled till the precision requirement is met. Compared with the prior art, by arranging a soft limitation on the inner side of a hard limitation, the position ofthe sliding block is estimated before control each time, if the soft limitation is exceeded, the controlling quantity is adjusted to control the sliding block to move to the soft limitation and thenstop, thus it is ensured that the vector adjusting mechanism moves within the safety range, a hard limitation switch is not touched, mechanical damage is avoided, and the good using value is achieved.

Description

technical field [0001] The invention relates to the field of electromechanical integration control, in particular to a safety limit method of a vector regulating mechanism. Background technique [0002] The DFH-3B platform can use the electric propulsion system to complete the 15-year north-south position protection. The electric propulsion system includes electric thrusters, power supply and distribution processing units, storage and supply systems, and control modules. thrust. The electric thruster works in orbit for a long time every day. In order to reduce the influence of the disturbance torque caused by the thrust direction deviating from the center of mass of the star during the ignition process of the thruster, the electric propulsion subsystem is equipped with a vector adjustment mechanism, which serves as the support of the electric thruster and adjusts the electric thrust. The direction of the thruster ensures that the thrust vector of the thruster passes through...

AI Technical Summary

Problems solved by technology

[0004] When using the existing limit method, because the control parameters are obtained by linearizing the complex nonlinear model of the vector adjustment mechanism, there is overshoot in the control process, and the slider often needs to be adjusted several times around the target position to achieve the accuracy index. , there is an overshoot process. When the position of the slider corresponding to the target angle is close to the hard limit, the slider may touch the hard limit by mistake, causing the mechanism to stop, and precise control cannot be achieved. Increased risk of mechanical injury

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