×

Suspension apparatus for a vehicle

  • US 5,301,111 A
  • Filed: 01/22/1993
  • Issued: 04/05/1994
  • Est. Priority Date: 11/29/1989
  • Status: Expired due to Fees
First Claim
Patent Images

1. A support apparatus for dampingly supporting an object on a support member, said support apparatus comprising:

  • a linear motor disposed between said object and said support member for telescopically supporting said object under magnetic effects, said linear motor having a stator member and a movable member which is movable relative to said stator member, said movable member being magnetically connectable with said stator member, one of said stator member and said movable member being connected to said object, the other of said stator member and said movable member being connected to said support member;

    a position sensor for sensing the position of said object relative to a reference position and generating an output signal representative of the sensed relative position of said object;

    height control means including a low-pass filter, coupled to said position sensor, for filtering high-frequency components of the output signal of said position sensor that are above a prescribed upper frequency limit;

    vibration isolating means including a high-pass filter, coupled to said position sensor, for filtering low-frequency components of the output signal of said position sensor that are below a prescribed lower frequency limit;

    sensing means for sensing various conditions of said object;

    attitude control means, responsive to said sensing means, for calculating a target object height or attitude; and

    current control means, coupled to said height control means, vibration isolating means, and attitude control means, for controlling, based on output signals of said low-pass filter and high-pass filter, the current supply to said linear motor in such a manner as to offset a change in said output signal of said low-pass filter so as to maintain said target object height or attitude, and a change in said output signal of said high-pass filter so as to compensate for non-controlled high-frequency vibrations of said object.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×