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Millimeter wave length guidance system

  • US 4,665,401 A
  • Filed: 10/10/1980
  • Issued: 05/12/1987
  • Est. Priority Date: 10/10/1980
  • Status: Expired due to Term
First Claim
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1. High frequency, vehicle coupled, target detecting seeker system having search and track modes and having twist reflector antenna means coupled to receiver means comprising:

  • a high frequency target sensor system having search and track modes coupled to said receiver means for detecting the position and range of said target and for providing target range signals, and signals Kε

    e representative of the difference between said antenna'"'"'s actual and desired line of sight rates of angular change with respect to a first predetermined reference in a first direction, and signals Kε

    a representative of the difference of said antenna'"'"'s actual and desired line of sight rate of angular change with respect to said first predetermined direction in a second direction orthogonal to said first direction, and for further providing signals λ

    del representative of said antenna'"'"'s desired line of sight angle with respect to said first predetermined reference in said first direction and signals λ

    daz representative of said antenna'"'"'s desired line of sight angle with respect to said first predetermined reference in said second direction;

    antenna drive means coupled to said twist reflector antenna means and coupled to said target sensor system means for positioning said antenna in said first and second directions according to said target sensor system signals;

    first angle sensor means coupled to said antenna drive means for providing signals β

    representative of said antenna drive means angle in said first direction with respect to said first predetermined reference;

    second angle sensor means coupled to said antenna drive means for providing signals ψ

    representative of said antenna drive means angle in said second direction with respect to said first predetermined reference;

    first vehicle rate sensor means coupled to said vehicle for providing signals θ

    p representative of the angular rate of change of said vehicle in a third direction with respect to a second predetermined reference;

    second vehicle rate sensor means coupled to said vehicle for providing signals φ

    HD R representative of the angular rate of change of said vehicle in a fourth direction orthogonal to said third direction, with respect to said predetermined reference;

    third vehicle rate sensor means coupled to said vehicle for providing signals φ

    y representative of the angular rate of change of said vehicle in a fifth direction orthogonal to said third and fourth directions, with respect to said second predetermined reference; and

    antenna control means coupled to said antenna drive means and adapted to receive said signals Kγ

    e, Kε

    a, θ

    p, φ

    R, θ

    y, β

    , ω

    , λ

    daz and λ

    del for providing signals in said track mode for controlling said antenna drive means rate of angular change β

    in said first direction substantially according to the formula;

    
    
    space="preserve" listing-type="equation">β

    =1/2(Kε

    .sub.e -θ

    .sub.p +2ψ

    φ

    .sub.R) and for further providing signals in said track mode for controlling said antenna drive means angular rate of change ψ

    in said second direction substantially according to the formula;

    
    
    space="preserve" listing-type="equation">ψ

    =1/2(Kε

    .sub.a -θ

    .sub.y -2β

    φ

    .sub.R) and for providing signals in said search mode for controlling said antenna drive means angular rate of change β

    in said first direction substantially according to the formula;

    
    
    space="preserve" listing-type="equation">β

    =1/2[K(-∫



    .sub.p. -2φ

    .sub.R ψ

    )dt+λ

    .sub.del -2β

    )-(θ

    .sub.p -2φ

    .sub.R ψ

    )] and for further providing signals in said search mode for controlling said antenna drive means angular rate of change ψ

    in said second direction substantially according to the formula;

    
    
    space="preserve" listing-type="equation">3/8=1/2[K(-∫



    .sub.y +2β

    φ

    .sub.R)dt+λ

    .sub.daz -2ψ

    )-(φ

    .sub.y+ 2β

    φ

    .sub.R)].

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