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    • 11. 发明公开
    • MULTI-AXIS ANGULAR RATE SENSOR HAVING A SINGLE DITHER AXIS
    • 具有单个轴的多轴角度传感器
    • EP0342230A4
    • 1991-05-15
    • EP89901220
    • 1988-10-25
    • SUNDSTRAND DATA CONTROL, INC.
    • HULSING, RAND, H., II
    • G01P15/11G01C19/5705G01C19/5776G01P15/08G01P15/14G01P9/04
    • G01C19/5705G01C19/5776
    • A Coriolis rate sensor for determining both angular rate and linear acceleration with respect to three orthogonal axes. A first embodiment of the rate sensor (10) includes three pairs of accelerometers (26, 28 and 30) mounted on counter-rotating frame members (20, 22). The accelerometers are mounted with their sensitive axes antiparallel with each other, forming an acute angle with the common axis (40) about which the upper and lower frame members are counter-rotated back and forth in a dither motion. The upper and lower frame members are connected to a baseplate (12) by flex links (32), which are aligned radially about the axis. The flex links provide a relatively rigid support (in compression) between the frame members and the centrally disposed baseplate, yet readily permit counter-rotation of the two frame members. A link (56) prevents all but relative rotational movement between the frame members and baseplate. A pair of electromagnetic coils (42) and pole pieces (50) provide a sinusoidal driving force to counter-rotate the upper and lower frame members relative to each other to ensure that the upper and lower frame members are directly coupled to each other and to the baseplate. In a second embodiment of the rate sensor (100), eight accelerometers (102, 104, 106 and 108) are mounted with two pairs on an upper counter-rotating member and two pairs on a lower counter-rotating member.