n.

helicopter carrying a reel of steel cable that can be used to lift and transport heavy objects

a hook that is imagined to be suspended from the sky

A non-synchronous orbital skyhook
No-Jerk Skyhook Control Methods for Semiactive Suspensions
Skyhook and H8 Control of Semi-active Suspensions: Some Practical Aspects
Linear and non-linear skyhook damping control laws for active railway suspensions
Vehicle active suspension system using skyhook adaptive neuro active force control
Modified Skyhook Control of Semi-Active Suspensions : A New Model, Gain Scheduling, and Hardware-in-the-Loop Tuning
Hybrid Suspension System with Skyhook Control and Energy Regeneration (Development of Self-Powered Active Suspension)
HYBRID SUSPENSION SYSTEM WITH SKYHOOK CONTROL AND ENERGY REGENERATION. (DEVELOPMENT OF SELF-POWDERED ACTIVE SUSPENSION)
Field test results of a semi-active ER suspension system associated with skyhook controller
Steering and suspension system of a half car model using fuzzy reasoning and skyhook dampers