Counterweight-based gravity offload system

A counterweight-based gravity offload apparatus, comprising:

• a multi-segment articulated arm having a plurality of arm segments connected by rotational joints;
• a cable routing system that feeds a cable through coaxial apertures of the rotational joints such that articulation of the arm does not substantially change an effective cable path length;
• a counterweight operatively connected to the cable;
• and
• a payload interface connected to the cable,
• wherein the counterweight provides a substantially constant offload force independent of arm orientation.

A method for simulating reduced gravity, comprising:

• suspending a payload from a payload attachment interface coupled to a cable;
• routing the cable through a cable-and-pulley arrangement and through coaxial apertures in rotational joints of a multi-segment articulated arm;
• applying a passive counterweight force to the cable;
• and
• adjusting an amount of counterweight to replicate a target gravity level,
• wherein articulation of the arm does not substantially vary the offload force applied to the payload.

A counterweight-based gravity offload apparatus, comprising:

• one or more hollow arm segments coupled to a structural framework;
• one or more pulleys encapsulated within the hollow arm segments;
• a cable coupled to one or more payload or a user and routed around the pulleys;
• and
• a counterweight assembly having at least one counterweight coupled to the cable and the structural framework,
• wherein the one or more pulleys and the cable forms an internal pulley architecture that maintains a substantially constant offload force while protecting the cable and pulleys from external interference.

A method for simulating reduced-gravity conditions, comprising:

• suspending a payload or user from a cable routed through a pulley system;
• applying a passive counterweight force to the cable to offset at least a portion of the payload or user's weight;
• and
• adjusting the counterweight force by adding or removing weights to replicate a target gravitational environment.