My model is shaking

Hello, I am making a game with an airplane but he is shaking (or the cam).

This is my smooth follow cam:

  this.transform.rotation = Quaternion.Lerp(transform.rotation, Target.transform.rotation, Time.deltaTime * 100);
         this.transform.LookAt(Target.transform.position + Target.transform.forward * Offset.x, transform.up);
         positionTargetUp = Vector3.Lerp(positionTargetUp, (-Target.transform.forward + (Target.transform.up * Offset.y)), Time.fixedDeltaTime * TurnSpeedMult);
         Vector3 positionTarget = Target.transform.position + (positionTargetUp * Offset.z);
         float distance = Vector3.Distance(positionTarget, this.transform.position);
         this.transform.position = Vector3.Lerp(this.transform.position, positionTarget, Time.fixedDeltaTime * (distance * FollowSpeedMult));

-They all are near 0,0,0 -The function is in LateUpdate