A comprehensive inspection method for servo-elastic vibration suppression for slender aircraft
A technology of servo elasticity and inspection method, which is applied in the direction of instruments, general control systems, control/regulation systems, etc., and can solve the problems of increasing the working current of the steering gear and decreasing the performance of the steering gear.
Active Publication Date: 2021-03-09
SHANGHAI AEROSPACE CONTROL TECH INST
View PDF11 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
If the servo vibration occurs during the flight, it will cause the working current of the steering gear to increase, and the performance of the steering gear will decrease, which will bring greater risks to the flight test.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0025] Hereinafter, the present invention will be further described in conjunction with the drawings and embodiments.
[0026] A comprehensive inspection method for servo elastic vibration suppression of slender aircraft disclosed by the present invention, the implementation steps are as follows:
[0027] Determine the frequency range that needs attention according to the computer sampling frequency. The upper limit of the frequency range is half of the computer sampling frequency. In this example, the computer sampling frequency is 400Hz, so focus on frequencies within 200Hz.
[0028] 1. Through calculation or ground test, obtain the elastic mode frequency of each order within 200Hz for the pitch channel and yaw channel of the aircraft, and the torsional mode frequency of each order within 200Hz for the roll channel;
[0029] 2. Carry out the vibration test of the inertial measurement combination. The test method is to carry out random vibration along the X, Y, and Z axes of ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a comprehensive inspection method for servo elastic vibration suppression for a slender aircraft. The implementation steps are as follows: Step 1. Obtain the elastic modal frequencies of the aircraft's pitch and yaw directions through calculation or ground test, and obtain the torsion in the rolling direction. modal frequency. Step 2: Obtain the resonant frequency and magnitude of the gyro output signal of the inertial measurement combination under a certain vibration condition through the ground test. Step 3: Obtain the modal frequency of the rudder surface of the electric steering gear through the ground test. Step 4: Select the characteristic point with the largest gain in the closed-loop system, and carry out the closed-loop system test for the above-mentioned frequencies to test the servo elastic vibration of the aircraft. The invention tests the design of the control system by means of a ground test, thereby reducing the risk of servo elastic vibration caused by vibration, external impact and other reasons under the real mechanical environment during the flight.
Description
technical field [0001] The invention relates to a ground test method suitable for slender aircraft, which can fully consider the vibration frequency of the aircraft, inertial measurement combination hardware products and electric steering gear hardware products, and comprehensively check the design of the control system for elastic vibration suppression. Background technique [0002] With the demand for long-distance flight of the aircraft, a wingless aerodynamic shape with a large slenderness ratio is usually adopted to increase the charge of the engine and reduce the aerodynamic drag. The range is also increased by the form of ballistic high throw, which needs to be improved. The gain of the system is controlled. On the other hand, in order to meet the requirements of the aircraft for increased response speed, the bandwidth of sensitive components and electric steering gear is also significantly increased. [0003] The principle of flight control is inertial measurement o...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G05B23/00
CPCG05B23/00
Inventor 奚勇冯昊陈光山唐德佳陶键霍红梅王璐
Owner SHANGHAI AEROSPACE CONTROL TECH INST