An Active Vibration Suppression Method of Variable Speed Tilt Momentum Wheel System Based on Torque
A vibration suppression, momentum wheel technology, applied in general control systems, control/regulation systems, instruments, etc., can solve problems such as inability to change tilt vibration, residual imbalance of variable speed tilt momentum wheels, etc., to improve two-dimensional attitude angular rate measurement Accuracy, the correction effect is remarkable, the effect of improving the output accuracy
Active Publication Date: 2021-06-29
HARBIN INST OF TECH
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Problems solved by technology
[0006] The present invention solves the problem that the variable-speed tilting momentum wheel after dynamic balancing still has residual unbalance, and the existing dynamic balancing technology can only suppress the tilting vibration caused by the uneven distribution of rotor mass, and cannot change the non-orthogonal, non-uniform The problem of tilting vibration caused by unideal factors such as coplanarity
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Embodiment
[0053] Such as figure 1 As shown in Fig. 6, this embodiment provides the implementation process of an active vibration suppression method for variable-speed tilting momentum wheels based on a torque device when the rotation speed is 3600 rpm:
[0054] Using the torque device, the torque applied on the x-axis of the variable speed tilting momentum wheel rotor is The torque applied on the y-axis of the rotor is where i=1,2,...,7, ω 1 =60×360 degrees / second. Under the open-loop condition of the tilting circuit at the speed ω 1 Stable operation, use the tilt sensor to measure the tilt angle signal around the x-axis, and use the fast Fourier transform to calculate the one-fold frequency amplitude of the tilt angle as As shown in Table 1.
[0055] Table 1. Amplitude of one-octave frequency of roll angle at different moment input
[0056]
[0057] It is known that the torque applied by the torque coil is proportional to the voltage of the torque coil, therefore, there i...
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An active vibration suppression method for a variable-speed tilting momentum wheel system based on a torque device relates to the field of rotor vibration suppression. The invention aims to solve the problem that the variable-speed tilting momentum wheel after dynamic balancing still has residual unbalance, and the existing dynamic balancing technology can only suppress the tilting vibration caused by the uneven distribution of rotor mass. It can be seen from the formula that the rotor tilt angle output φ of the variable speed tilt momentum wheel is in direct proportion to the torque input T, and the tilt angle output φ is proportional to the square of the rotational speed ω 2 It is an approximately inverse proportional relationship, use the formula (1) to determine the amplitude and phase of the correction torque to be applied under different speed conditions, and then use the torque device to apply real-time correction torque to the rotor to achieve active vibration suppression of the variable speed tilting momentum wheel . The method of the invention utilizes a torque device to apply precise acting torque to the rotor, which can effectively suppress the one-fold frequency component of the tilting vibration caused by the residual unbalance and the superimposed action of various unideal factors.
Description
technical field [0001] The invention relates to the field of rotor vibration suppression, in particular to an active vibration suppression method for variable speed tilt momentum wheel rotor tilt. Background technique: [0002] The variable-speed tilting momentum wheel is a new type of attitude control and attitude-sensitive device, which integrates the functions of variable-speed double-frame control moment gyro and dynamic tuning gyro. By controlling the magnitude and direction of the angular momentum of a flat rotor, three-dimensional control torque output and two The three-dimensional attitude angular rate measurement can greatly reduce the volume, mass, power consumption and cost of the attitude control system, and improve the integration of the system. Therefore, the variable speed tilting momentum wheel is suitable for the attitude control of tiny spacecraft. [0003] The special functions of three-dimensional control torque output and two-dimensional attitude angular...
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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 霍鑫刘海媛刘思源陈硕张媛媛赵辉
Owner HARBIN INST OF TECH