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Abstract
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This thesis mainly concerns on designing of modified guidance law in a two-dimensional guidance system with considering of sensor and actuator dynamic. Utilizing a first-order dynamic model is the most common way to describe the sensors and actuators in the guidance problems. The guidance system stability would be disturbed if the sensor and/or actuator are added to the closed-loop system. So it is evident that the expected performance would not be achieved if the sensor and actuator dynamics are considered. Furthermore, in a typical guidance problem, the actuators and sensors would have some unmolded dynamics. Hence, in this study, a first-order and high-order transfer functions will be taken into account for the actuator. Then, the proportional navigation (PN) guidance law would be modified via the back-stepping idea. Similarly, a first-order transfer function plus time-delay is used for the sensor in such a guidance system. Then, the PN guidance law is modified using the time-delay approximation technique. Therefore, first, the PN guidance algorithm is evaluated in presence of senseor and actuator dynamic. Thus, the PN guidance law will be corrected in such a way that the actuator and the sensor effect is compensated on the closed-loop performance. Finally, to demonstrate the effectiveness of the proposed methods, the results are simulated in some guidance examples.
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