Below you will find ten different options for controlling linear actuators. This list is intended to give you an overview of what's possible for linear actuator control. It's not exhaustive, there are other options, but these are the ones that will work for most people.
Rutgers University-New Brunswick engineers have discovered a simple, economical way to make a nano-sized device that can match the friendly neighborhood Avenger, on a much smaller scale. Their creation weighs 1.6 milligrams (about as much as five poppy seeds) and can lift 265 milligrams (the weight of about 825 poppy seeds) hundreds of times in a row.
Phys.org: Soft robots do a lot of things well but they're not exactly known for their speed. The artificial muscles that move soft robots, called actuators, tend to rely on hydraulics or pneumatics, which are slow to respond and difficult to store.
Dielectric elastomers, soft materials that have good insulating properties, could offer an alternative to pneumatic actuators but they currently require complex and inefficient circuitry to deliver high voltage as well as rigid components to maintain their form—both of which defeat the purpose of a soft robot.
Now, researchers at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) have developed a dielectric elastomer with a broad range of motion that requires relatively low voltage and no rigid components. They published their work recently in Advanced Materials. Cont'd...
Magnetic robot end-of-arm tooling are suitable for the automated pick-up and positioning of steel or other ferromagnetic objects. They can be switched on and off and have a threaded mounting hole for robots. Magnetic grippers are an efficient alternative for traditional robot grippers. Application in automated production lines and for robots and pick-and-place systems. Magnetic product handling reduces the duration and number of operations. Goudsmit Magnetics is driven by magnetism since 1959. See how it works: https://youtu.be/hcXJ98mXHZE