Designing control force loading
I believe I discovered how to do this. I am going to connect the flight controls to linear actuators, and they will be connected to the linear actuators with load cells inbetween. My L1011 yoke has 4 load cells in it, 2 for pitch, 2 for roll, one for each autopilot. Light control loading, the linear actuator moves with the pilots movements as sensed on the load cells. To increase control loading, you simply require the pilot to excert more force on the controls to make the linear actuators move with the pilots inputs. For pitch trim, as we all know, trim feels neutral at a certain airspeed, as trim is for airspeed. As the airplane picks up airspeed, more than what is trimmed, the linear actuator will move the yoke in the direction of pitch that the airplane is trimmed for. Pilot resists this, and the larger the airspeed spread to trim speed, the more force that is required to fight against the linear actuator. Simply move the trim wheels to relieve control pressure, which will also trim the airplane for the new airspeed, as it does in real life. I just ordered a microcontroller developement board and a 25lb load cell to experiment with this. Will probably make a mosfett powered H bridge motor controller that runs off the MCU to control the linear actuator. More to come when I find time between my flight instructor job that takes 6 out of the 7 days in the week...
I am pretty sure this is how the professional sims do it, and well, how the L1011 did it with the autopilots and the trim wheel. The trim wheel on the yoke of the L1011 didn't do anything when in CWS mode unless the pilot excerted 4lbs or more of force. I am going to rename the L1011 the "Enterprise" Freaking airplane was way ahead of its time.