Redundant electrohydraulic positioning control system

A method for controlling an electrohydraulic positioning control system, the method comprising:

• controlling, by a first servo controller configured to provide a first health signal, a first servo valve to selectably permit flow between a first fluid port and a fluid source, permit flow between the first fluid port and a fluid drain, and block fluid flow between the first fluid port, the fluid source, and the fluid drain, wherein the controlling is based on a position demand signal, a position feedback signal, a first priority signal representative of a first command for the first servo controller to act as a primary servo controller, and a second health signal;
• providing, by the first servo controller, the first health signal;
• controlling, by a second servo controller, a second servo valve to selectably permit flow between a second fluid port and the fluid source, permit flow between the second fluid port and the fluid drain, and block fluid flow between the second fluid port, the fluid source, and the fluid drain, wherein the controlling is based on the position demand signal, the position feedback signal, a second priority signal representative of a second command for the second servo controller to act as a primary servo controller, and the first health signal;
• providing, by the second servo controller, the second health signal;
• and
• directing, by a shuttle valve, fluid flow between a selectable one of the first fluid port and the second fluid port, and a fluid outlet configured to be fluidically connected to a fluid actuator.