Abstract




 
   

IJE TRANSACTIONS A: Basics Vol. 32, No. 4 (April 2019) 555-561    Article in Press

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  DESIGN OF GENERALIZED PREDICTIVE CONTROL FOR THE STABILIZING LOOP FROM A TWO-AXIS GIMBAL SEEKER, CONSIDERING CROSS-COUPLING IN BETWEEN TWO CHANNELS
 
M. Pirzadeh and A. R. Toloei
 
( Received: October 06, 2018 – Accepted: January 03, 2019 )
 
 

Abstract    In this research, Generalized Predictive control (GPC) is proposed for the control of a stabilizing loop from a two axis gimbal seeker. In fact, there are some views about using GPC type controller which are two folds. First, it drives the stabilization loops that are made by a DC motor, Rate Gyro, inertia and cross coupling unit in between two channels using the predictive model type controller. Second, the theory is to excavate the results of flight simulation on the efficiency of two-axis gimbal seeker. The simulations, based on different scenarios, are valuated for the proficiency of the designed system considering the dynamic mass imbalance and the cross-coupling in between two channels and the flight simulation. The flight simulation results are explained the accuracy of the designed system with predictive control in opposite of conventional PI controller. For example, the simulation results in altitude of 2km show the suggested system in comparison with conventional PI controller improves miss-distance and flight time 11.98% and 1.5% respectively. Moreover, the suggested system in maximum control signal is 72.61%, minimum control signal is 1.55% and final time is 80.43% (control effort parameter), which is better than PI type controller.

 

Keywords    Generalized Predictive Control; Gimbal Seeker; Cross Coupling; Control Effort

 

چکیده   

در این تحقیق، به منظور کنترل جستجوگر گیمبال دومحوره یک کنترل کننده پیش بین تعمیم یافته ارائه می گردد. در حقیقت دو رویکرد مهم در استفاده از این نوع کنترلر وجود دارد; اول، کنترل سیستم حلقۀ پایدارساز جستجوگر بهمراه سایر زیرسیستم های تشکیل دهندۀ آن با درنظر گرفتن اتصال متقاطع بین دوکانال و دوم، بررسی عملکرد سیستم ارائه شده تحت شرایط پروازی با درنظرگرفتن دینامیک شئ پرنده. شبیه سازیها به ازای سناریوهای مختلف و با درنظر گرفتن ناپایداری جرمی و اتصال متقاطع و شرایط پروازی، عملکرد سیستم ارائه شده را مورد ارزیابی قرار می دهند. نتایج شبیه سازیها دقت سیستم طراحی شده با کنترلر GPC را در برابر کنترلر PI نشان می دهد. بدین صورت که نتایج شبیه سازی در ارتفاع 2کیلومتری نشان می دهد که خطای Miss-distance و زمان پروازی بترتیب حدود 98/11 و 5/1% بهبود یافته است. بعلاوه، سیگنال کنترلی و زمان نهایی(پارامترهای تلاش کنترلی) بترتیب حدود 55/1 و 43/80% نسبت به روش مرسوم بهبود یافته است.

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