It is the task of the guidance system to cause the rocket to take up any one of these free-flight paths. For each such point there is a corresponding proper velocity. There is no single set of initial conditions required to arrive at a specified target, but rather there are an infinite number of possible free-flight paths originating at points in space in the vicinity of some nominal starting point which terminate at the desired destination. The necessary initial free-flight conditions are the position and velocity.
ROCKET FLIGHT CONTROL SYSTEM FREE
For ballistic missiles, guidance (sometime referred to as ascent guidance) is used only during powered flight, and guidance accuracy depends upon accurate establishment of flight conditions at the point of transition from powered to free flight. Space-flight missions in the immediate future will use ballistic rockets, and the guidance of such vehicles will be extensions of current ballistic missile guidance techniques. Air-to-air missiles such as Sidewinder employ terminal guidance systems that lead the missile directly to the target on the basis of measurements on the target itself.Īny or all of these three kinds of guidance will be necessary for space flight, depending on the type of vehicle and mission involved. Guidance operations may occur in the initial, midcourse, or terminal phases of flight.īallistic missiles are commonly guided only during the initial flight phase,Ī cruise type of missile, such as the Snark or Matador, uses midcourse guidance, operating continuously during cruising flight. The guidance process consists of measurement of vehicle position and velocity, computation of control actions necessary to properly adjust position and velocity, and delivery of suitable adjustment commands to the vehicle's control system. THE GUIDANCE OF SPACE VEHICLES 10, GUIDANCE
0 kommentar(er)
