Wheelchairs and methods for adjusting or maintaining a wheelchair user's center of gravity

A wheelchair comprising:

• a seat,
• a first adjustable leg coupled to a first side of the seat, the first adjustable leg comprising a first leg actuator configured to extend and retract the first adjustable leg;
• a second adjustable leg coupled to a second side of the seat, the second adjustable leg comprising a second leg actuator configured to extend and retract the second adjustable leg;
• one or more user posture sensors configured to output a posture signal indicative of a posture of a user positioned on the seat;
• a control unit configured to:
• determine a location of a center of gravity of the user based on the posture signal output by the one or more user posture sensors;
• and
• automatically adjust a tilt angle of the seat with the first leg actuator and the second adjustable leg actuator to maintain the center of gravity of the user at a predetermined position.

A method for maintaining a wheelchair user's center of gravity at a predetermined position, the method comprising:

• receiving, with a control unit, a posture signal from one or more posture sensors, the posture signal being indicative of a posture of a user positioned on a seat of a wheelchair;
• determining, with the control unit, a location of a center of gravity of the user based on the posture signal;
• and
• adjusting, automatically with the control unit, one or more actuators to adjust a tilt angle of the seat to maintain the center of gravity of the user at the predetermined position.