IEEE-293-1969-R2005.pdf
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1、ANSI/IEEE Std 293-1 969 (IEEE Reaffirmed June 19. 1986) Approved November 17, 1986 American National Standards Institute IEEE Test Procedure for Single-Degree-of-Freedom Spring-Restrained Rate Gyros Published by The Institute of Electrical and Electronics Engineers, Inc 345 East 47th Street, New Yor
2、k, N Y 10017, USA ,A/O/(“/s) at (U,/ (b) Amplitude measurement method, Means of measuring the peak amplitude of the input rate, Means of measuring the in-phase component of the gyro output. 4.22.1.3 Test Setup and Procedure 4.22.1.3.1 Test Setup. Mount the gyro on the oscil- lating rate table with t
3、he gyro IRA aligned parallel to the axis of the table and nominally vertical. Operate the gyro in accordance with the standard test conditions of paragraph 3.1. Connect the gyro pickoff output and the table rate output to the phase measuring device. 4.22.1.3.2 Test Procedure 4.22.1.3.2.1 Natural Fre
4、quency. Apply a sinusoidal input of f _ O /s peak. Determine the input frequency f, at which the gyro output lags the input rate by 90 f _ degrees. 4.22.1.3.2.2 Damping Ratio. Apply a sinusoidal input rate of f O/s peak at frequencies of fJa, fJb, , f hertz where a, b, etc., are determined by the us
5、ers requirements. Measure the phase relation between the gyro input and output or 4.22.1.4 Test Results 4.22.1.4.1 Natural Frequency. The natural frequency f . measured in paragraph 4.22.1.3.2.1 shall conform to the requirement of paragraph - . 4.22.1.4.2 Damping Ratio. The damping ratio is cal- cul
6、ated from the data obtained in paragraph 4.22.1.3.2.2 -. by comparing the measured phase relationships with a phase angle-frequency plot for a damped second-order / k measure the peak amplitude of the gyro output. system or by comparing the measured amplitude ratios with an amplitude-frequency plot
7、for a damped second- order system. The damping ratio shall conform to the requirement of paragraph - . 4.22.2 Step Input Method 4.22.2.1 Purpose. The purpose of this test is to deter- mine the natural frequency and the damping ratio of the gyro by measuring its response to a step input. 4.22.2.2 Tes
8、t Equipment. The following test equipment from paragraph 3.2 is required for this test: Means of applying a step rate input to the gyro, Means of recording the gyro response to a step rate input. 4.22.2.3 Test Setup and Procedure. Mount the gyro on the step rate table with the gyro IRA aligned paral
9、lel to the axis of the table and nominally vertical. Operate the gyro in accordance with the standard test conditions of paragraph 3.1. Connect the gyro pickoff output and the table motion output to the recorder. Apply a change of rate from _ O/s to .- f - O/s during a period not to exceed _ seconds
10、. Record the gyro and the table motion outputs. 4.22.2.4 Test Results. The gyro natural frequency and damping ratio are determined by comparing the recorded response with the step response of a damped second-order system. The natural frequency shall con- form to the requirement of paragraph - , and
11、the damping ratio shall conform to the requirement of para- graph - 4.23 Warm-up Time Test 4.23.1 Purpose. The purpose of this test is to determine the time interval required for the gyro to reach specified performance from the instant that it is energized under specified operating conditions. 4.23.
12、2 Test Equipment. The following test equipment from paragraph 3.2 is required for this test: Oscillating rate table (means of applying a sinusoidal rate to the gyro at a controlled frequency and am- plitude), Means of measuring the in-phase component of the gyro output, Means of measuring the elapse
13、d time. 4.23.3 Test Setup and Procedure. Mount the gyro on the oscillating rate table with the gyro IRA aligned parallel to the axis of the table and nominally vertical. Operate the gyro in accordance with the standard test conditions of paragraph 3.1 except that the thermal and mechanical starting
14、conditions shall be and the energizing sequence shall be - . 13 Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 07/30/2008 03:55:11 MDTNo reproduction or networking permitt
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