Patent RU-2249173-C1 (RU)
Title: Method to test a developed torque of an electro-pneumatic steering gear of guided missiles and projectiles
Inventor: FIMUSHKIN V S
IPC: F42B15/01
Filed: 2003-07-14
Granted: 2005-03-27
Abstract: FIELD: defense engineering; production of guided missiles and projectiles. 
     SUBSTANCE: the invention is pertinent to the field of defense engineering, in particular, to production of guided missiles and projectiles. The technical result of the invention is simplification of testing, increased accuracy, decreased labor input and cost of the testing. The method of testing of a developed torque of an electro-pneumatic steering gear of guided missiles and projectiles is based on a torque measurement of the steering gear with the help of a reference load and an easily removable balance lever put on a rudder. Then the steering gear with a detector of the rudders motion are installed on a customizing table. The detector of the rudders motion is made in the form of a separate contact or non-contact sensor or for the purpose they use an available in the steering gear as a feedback gauge - the gauge of a piston linear motion or a gauge of angular motion of rudders. The rudders turning at a maximum angle in one side is made using application of a torque of the corresponding sign by a reference load with the weight on a definite length of an arm of a placement of the load on the lever in respect to the axis of rotation of the rudders equal to a developed torque of the steering gear at the given pressure of the feeding. Switch on the power of the gauge, measure the voltage on the gauge output by a voltmeter, remove a torque by removal of the reference load, turn the rudders at a maximum angle in other side using application of a torque of an opposite sign equal to a maximum torque of a hinged load on the rudders in respect to the rudders turning angle and an angle of attack of a missile or a projectile. Switch on power supply of the booster of the steering gear and feed onto an input of the steering gear compressed air under pressure of P = 1.5P gvn. , feed onto the input of the steering gear a maximum control signal of management corresponding to the motion of the rudders at a maximum angle, measure the voltage on the output of the gauge, which should meet the first given ratio. By a smooth reduction of pressure of the feeding in the pneumo-circuit) of the steering gear and according to reduction of voltage on the output of the gauge determine pressure P       +   1        at which the voltage will meet the second given ratio. At that the pressure P       +   1        should be no more than P gvn  , remove a pneumatic feeding and the power supply of the booster of the steering gear and switch off the control signal and the power of the gauge. After that using an analogous method they measure voltages and determine the pressure at application of the corresponding torques and a control signal of an opposite sign and determine a developed torque of the steering gear according to the mathematical formula. 
     EFFECT: the invention ensures simplification of testing, increased accuracy, decreased labor input and cost of the testing. 
     5 cl, 1 dwg