An active vibration isolation system for a motor vehicle seat that is adapted to be occupied by a user, comprising: an active suspension system that supports the seat above a floor of the motor vehicle, where the suspension system comprises at least one actuator that can be controlled to move the seat up and down; a first sensor system mounted to the vehicle and that is adapted to sense vehicle height position changes; a second sensor system that is adapted to determine the seat translational position; and a controller that, in response to the first and second sensor systems, is adapted to provide control signals to the active suspension system that cause motions of the seat that are designed to control the height of the user's head or torso as the vehicle undergoes translations, wherein: the active suspension system comprises at least two actuators (42a, 44a), where the actuators can be controlled to move the seat up and down and rotate the seat in both directions about an axis; the first sensor system is further adapted to sense vehicle rotational position changes; the second sensor system is further adapted to determine a rotational position of the seat; the control signals further cause motions of the seat that are designed to control the lateral position of the user's head or torso as the vehicle undergoes rotations; characterized in that the at least two actuators function as position sources. an active suspension system that supports the seat above a floor of the motor vehicle, where the suspension system comprises at least one actuator that can be controlled to move the seat up and down; a first sensor system mounted to the vehicle and that is adapted to sense vehicle height position changes; a second sensor system that is adapted to determine the seat translational position; and a controller that, in response to the first and second sensor systems, is adapted to provide control signals to the active suspension system that cause motions of the seat that are designed to control the height of the user's head or torso as the vehicle undergoes translations, wherein: the active suspension system comprises at least two actuators (42a, 44a), where the actuators can be controlled to move the seat up and down and rotate the seat in both directions about an axis; the first sensor system is further adapted to sense vehicle rotational position changes; the second sensor system is further adapted to determine a rotational position of the seat; the control signals further cause motions of the seat that are designed to control the lateral position of the user's head or torso as the vehicle undergoes rotations; characterized in that the at least two actuators function as position sources. the active suspension system comprises at least two actuators (42a, 44a), where the actuators can be controlled to move the seat up and down and rotate the seat in both directions about an axis; the first sensor system is further adapted to sense vehicle rotational position changes; the second sensor system is further adapted to determine a rotational position of the seat; the control signals further cause motions of the seat that are designed to control the lateral position of the user's head or torso as the vehicle undergoes rotations; characterized in that the at least two actuators function as position sources.