I am investigating linear actuator technologies as an alternate to using pneumatics. I require independent control over both the output force and stroke velocity. The force needs to be varied between 30-160N and the stroke velocity varied up to a maximum 1.2m/s. The maximum frequency of actuator movement should be 16Hz. The stroke length should ideally remain the same at about 15-20mm. Any suggestions of anything that could provide this. I have been looking at electrical actuators but I don't know that its possible to independently control both the output force and speed.