How can i move a rigidbody according to its local axis?

The character always moves North, not the direction its looking at. the rigidbody moves to space's axis not the rigidbody's axis Heres the full script:

 using UnityEngine;
 using System.Collections;
 
 public class PlayerMovement : MonoBehaviour {
 
     public float speed = 6f;
     public float JumpVelocity = 10f;
     public GameObject cameraObject;
     public Rigidbody rb;
     Vector3 movement;
 
 
 
     // Use this for initialization
     void Start ()
     {
         rb = GetComponent<Rigidbody>();
     }
     
     // Update is called once per frame
     void FixedUpdate ()
     {
         transform.rotation = Quaternion.Euler(0, cameraObject.GetComponent<MouseLook>().currentYRotation, 0);
         //rb.AddRelativeForce(Input.GetAxis("Horizontal") * walkAcceleration, 0, Input.GetAxis("Vertical") * walkAcceleration);
 
         float h = Input.GetAxisRaw("Horizontal");
         float v = Input.GetAxisRaw("Vertical");
         
         Move(h, v);
 
     }
 
     void Move (float h, float v)
     {
         /*/
         if (Input.GetAxisRaw("Horizontal") != 0)
         {
             rb.AddRelativeForce(h * speed * Time.deltaTime, 0, 0, ForceMode.VelocityChange);
         }
         else
         {
             rb.velocity = Vector3.zero;
         }
         if (Input.GetAxisRaw("Vertical") != 0)
         {
             rb.AddRelativeForce(0, 0, v * speed * Time.deltaTime, ForceMode.VelocityChange);
         }
         if (Input.GetButtonDown("Jump"))
         {
             rb.AddForce(0, JumpVelocity * Time.deltaTime, 0, ForceMode.VelocityChange);
         }
         /*/
 
         movement.Set(h, 0f, v);
 
         movement = movement.normalized * speed * Time.deltaTime;
 
         rb.position = (transform.position + movement);
     }
 }