Active vibration suppression method for variable-speed tilting momentum wheel system based on torquer
A vibration suppression and momentum wheel technology, applied in general control systems, control/regulation systems, instruments, etc., can solve problems such as unchangeable tilting vibration, variable speed tilting momentum wheel residual imbalance, etc., achieve significant correction effect and improve output accuracy Effect
Active Publication Date: 2019-01-04
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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[0053] like 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 is t...
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An active vibration suppression method for a variable-speed tilting momentum wheel system based on a torquer relates to the field of rotor vibration suppression. The method is provided in order to solve the problem that a variable-speed tilting momentum wheel after dynamic balancing still has residual unbalance and the problem that the existing dynamic balancing technology can only suppress the tilting vibration caused by uneven mass distribution of the rotor. It can be known that, from a formula (1): Phi is approximately equal to T / [(Irs-Irt)*omega<2>], there is a directly proportional relationship between the tilting angle output Phi and the torque input T of the rotor of a variable-speed tilting momentum wheel, and there is an approximate inversely proportional relationship between thetilting angle output Phi and the square of speed omega<2>. The amplitude and phase of a correction moment required are determined by using the formula (1) under different speed conditions, and then, areal-time correction moment is applied to the rotor by a torquer to realize active vibration suppression of the variable-speed tilting momentum wheel. In the method, a precise action moment is applied to the rotor by the torque, which can suppress the frequency doubling component of the tilting vibration caused by the joint action of residual unbalance and various unsatisfactory 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