초록 ▼

A controlled motion apparatus capable of at least three degrees of freedom, such as apparatus for vibration testing of equipment, comprises a support suspended from a reaction mass by three anti-rotation, linear motion displacement actuator devices each extending and movable along one axis of an XYZ

A controlled motion apparatus capable of at least three degrees of freedom, such as apparatus for vibration testing of equipment, comprises a support suspended from a reaction mass by three anti-rotation, linear motion displacement actuator devices each extending and movable along one axis of an XYZ coordinate system. Each actuator may be independently activated to cause the support to undergo simultaneously controlled motion along the three axes.

대표청구항 ▼

Controlled motion apparatus comprising a rigid base member, a support member, and means for mounting the support member to the rigid base for controlled motion relative to the base, said support member mounting means comprising three independently-driven displacement actuators each having a fixed pa

Controlled motion apparatus comprising a rigid base member, a support member, and means for mounting the support member to the rigid base for controlled motion relative to the base, said support member mounting means comprising three independently-driven displacement actuators each having a fixed part and a linearly movable part and having one of said parts connected by means of a first non-rotatable universal joint to a region of said support member and having the other of said parts connected by means of a second non-rotatable universal joint to a region of said rigid base, each of said actuators being capable upon actuation of causing a linear motion displacement of said support member along one of three orthogonal axes of an XYZ coordinate system but without permitting rotation about its respective displacement axis of the actuator movable part with respect to its fixed part or of the actuator fixed part in response to a linear displacement of the support along any of the three orthogonal axes, said non-rotating actuators by means of the first and second non-rotatable universal joint connections cooperating, during driving of the actuators to cause the said support member to undergo a controlled motion relative to the rigid base member, to maintain the support member substantially parallel to a desired plane formed by two axes of the coordinate system and to constrain the motion of said support member substantially parallel to said desired plane, and means connected to the apparatus for sensing the amount of support member displacement in its three displacement axes and generating signals representative of said displacement.