A vehicle steering control system for a vehicle to control a steering system as a control target, configured to receive a plurality of m inputs and provide a plurality of n outputs based on the plurality of m inputs received, wherein each of m and n is a natural number that is more than one, m being equal to n, the inputs including operation quantities, the outputs including control quantities,
- the vehicle steering control system comprising:
- a plurality of feedback controllers, each of which is configured to calculate an operation quantity of the operation quantities based on a difference between (i) a target value, which is generated by a target value generator, the target value corresponding to a control quantity of the control quantities, and (ii) a current value of an output of the plurality of n outputs provided by the control target;
- and
- a non-interference controller provided between (i) the plurality of feedback controllers and (ii) the control target, the non-interference controller being configured to execute a non-interference control to reduce influence due to mutual interference between the outputs provided by the control target,
- wherein:
- the outputs provided by the control target include at least two control quantities among three control quantities that are (i) a steering angle, (ii) a yaw angle velocity, and (iii) a lateral acceleration, the three control quantities being vehicle properties of vehicle motions generated based on a driver's steering torque;
- a plurality of combinations of the inputs and the outputs in the control target are designated by the control system;
- and
- the non-interference control by the non-interference controller and the feedback control by the feedback controllers are configured to be executed with respect to each of the designated combinations of the inputs and the outputs.