A method of operating a vehicle control system that controls a vehicle and comprises a servo-assisted control unit, a mechanical linkage that is coupled to the servo-assisted control unit, an inceptor adapted for controlling the servo-assisted control unit via the mechanical linkage, a first force generating device that is mechanically connected to the inceptor, a second force generating device that is mechanically connected to the inceptor in parallel to the first force generating device, a hands-on/off detection management unit that is connected to the inceptor, and a decoupling device that is coupled between the second force generating device and the inceptor, comprising:
- configuring the hands-on/off detection management unit to operate in manned operation mode or in unmanned operation mode;
- in response to configuring the hands-on/off detection management unit to operate in manned operation mode:
- using the hands-on/off detection management unit to generate a control signal that is indicative of a manual intervention of a vehicle operator, and
- enabling or disabling the second force generating device based on the control signal from the hands-on/off detection management unit;
- and
- in response to configuring the hands-on/off detection management unit to operate in unmanned operation mode:
- using an automatic motion control system to control a position of the vehicle,
- using the hands-on/off detection management unit to generate a control signal that is indicative of a malfunction of the vehicle control system, wherein using the hands-on/off detection management unit further comprises using a sensor in the first force generating device to detect an increase in control forces caused by degradation of the servo-assisted control unit, and
- operating the decoupling device that is coupled between the second force generating device and the inceptor based on the control signal from the hands-on/off detection management unit, wherein operating the decoupling device further comprises using the second force generating device for trim and stabilization by coupling the second force generating device with the inceptor.