A motion simulator comprising a base (102), a platform (104), and a plurality of linear actuators (108) connecting the base and platform via a joint having at least two degrees of freedom, the joint (15) comprising an actuator clevis comprising first and second side lugs having first and second lug openings retaining a clevis pin, an anchor clevis retaining an axel comprising first and second axel fault retaining protrusions and an axel opening receiving the clevis pin and having primary and secondary axel passage sections, the first side lug opening, pin and first axel fault retaining protrusion having a primary lug radial clearance difference between a primary inner radius of the first lug opening and an outer radius of the pin that is less than a secondary lug radial clearance difference between a secondary lug inner radius of the first lug opening and a retaining outer radius of the first axel fault retaining protrusion.

A motion simulator includes a base plate, a motion platform, a first actuator, a base, a second actuator and a carrying platform. The motion platform is arranged on the base plate and movably connected to the base plate. The first actuator is arranged on the motion platform, movably connected to the motion platform. The base has a base body extending in a length direction and a base extension surface extending in a width direction. The first actuator is movably connected to the base extension surface. The second actuator is movably arranged on the base. The carrying platform is movably connected to the second actuator. Through a connection relationship between the base and the second actuator, the first actuator performs a left-right movement of the carrying platform relative to the motion platform and the second actuator performs the forward-backward movement of the carrying platform relative to the motion platform.

A telescopic actuator includes a first segment having a first hollow cavity, a second segment having a second hollow cavity, a third segment having a third hollow cavity, and a first port and a second port. The second segment is slidably connected to the first segment through the first hollow cavity, and the third segment is slidably connected to the second segment through the second hollow cavity, the second hollow cavity being insulated from the first hollow cavity and communicating with the third hollow cavity. The first port is configured to flow fluid into and out of the first hollow cavity, and the second port is configured to flow fluid into and out of the second hollow cavity and the third hollow cavity. Embodiments described herein also include a motion simulating apparatus and an actuating system incorporating the telescopic actuator.

A telescopic actuator includes a first segment having a first hollow cavity, a second segment having a second hollow cavity, a third segment having a third hollow cavity, and a first port and a second port. The second segment is slidably connected to the first segment through the first hollow cavity, and the third segment is slidably connected to the second segment through the second hollow cavity, the second hollow cavity being insulated from the first hollow cavity and communicating with the third hollow cavity. The first port is configured to flow fluid into and out of the first hollow cavity, and the second port is configured to flow fluid into and out of the second hollow cavity and the third hollow cavity. Embodiments described herein also include a motion simulating apparatus and an actuating system incorporating the telescopic actuator.

The invention is directed to a 6 degree-of-freedom motion hexapod simulator assembly comprising of a fixed base, a displaceable simulator platform comprising of a load bearing structure, and 6 linear actuators having upper ends thereof interconnected with the load bearing structure by three pairs of two-degree of freedom joints and lower ends thereof interconnected with the fixed base by means of three pairs of two-degree of freedom joints. The two degree of freedom joint comprises of two rotatable pivot means which are oriented 90° with respect to each other. One pivot means runs through the other pivot means. At the connection with the load bearing structure the center of one joint of a pair of joints is separated by part of the load bearing structure from the center of the other joint of the pair of joints.

The invention is directed to a 6 degree-of-freedom motion hexapod simulator assembly comprising of a fixed base, a displaceable simulator platform comprising of a load bearing structure, and 6 linear actuators having upper ends thereof interconnected with the load bearing structure by three pairs of two-degree of freedom joints and lower ends thereof interconnected with the fixed base by means of three pairs of two-degree of freedom joints. The two degree of freedom joint comprises of two rotatable pivot means which are oriented 90° with respect to each other. One pivot means runs through the other pivot means. At the connection with the load bearing structure the center of one joint of a pair of joints is separated by part of the load bearing structure from the center of the other joint of the pair of joints.

A compensated actuator, in various embodiments, comprises a base and an electric actuator and a fluid actuator interconnected to cooperatively allow for movement of an upper deck frame to which one or more compensated actuators are connected with or without using a pivoting connector. When so connected, a predetermined set of compensated actuators are connected to the upper deck frame and a platform intermediate the upper deck frame and the platform in a predetermined pattern and linear forces from the electric actuator and fluid actuator combined to impart rotation to an output attachment point.

A parallel mechanism comprises legs with kinematically redundant actuation for a parallel mechanism. Each of these legs comprises a first sub-leg and a second sub-leg, each said sub-leg comprising a proximal end and a distal end. A link has a proximal end and a distal end. A joint with a rotational degree of freedom (DOF) is between and common to the distal ends of each of the first sub-leg and the second sub-leg, and the proximal end of the link. A joint provides at least two rotational DOFs at the distal end of the link and is adapted to connect the distal end of the link to one end of the parallel mechanism. Joints in the first sub-leg and the second sub-leg to provide DOFs to the sub-legs and to connect the proximal ends of the sub-legs to the other end of the parallel mechanism. A degree of actuation (DOA) is provided for each of the first sub-leg and the second sub-leg to control movement of the link. A method for controlling movement of the parallel mechanism is also provided.

A parallel mechanism comprises legs with kinematically redundant actuation for a parallel mechanism. Each of these legs comprises a first sub-leg and a second sub-leg, each said sub-leg comprising a proximal end and a distal end. A link has a proximal end and a distal end. A joint with a rotational degree of freedom (DOF) is between and common to the distal ends of each of the first sub-leg and the second sub-leg, and the proximal end of the link. A joint provides at least two rotational DOFs at the distal end of the link and is adapted to connect the distal end of the link to one end of the parallel mechanism. Joints in the first sub-leg and the second sub-leg to provide DOFs to the sub-legs and to connect the proximal ends of the sub-legs to the other end of the parallel mechanism. A degree of actuation (DOA) is provided for each of the first sub-leg and the second sub-leg to control movement of the link. A method for controlling movement of the parallel mechanism is also provided.

The invention is directed to an overdetermined movement platform system, comprising a base; a platform movable along 6 degrees of freedom relative to said base; at least eight long-stroke actuators, wherein each actuator couples the base with the platform and a controller which (a) is configured to adapt a demanded platform movement set-point to a commanded platform movement set-point, (b) is configured to move the eight long-stroke actuators such that the commanded platform movement set-point is achieved and (c) is configured to dynamically redistribute the forces as exercised by the actuators on the platform between the actuators.