Guidance Law Design for a Class of Dual-Spin Mortars

To minimize the cost and maximize the ease of use, a class of dual-spin mortars is designed which only rely on GPS receiver and geomagnetic measurements. However, there are some problems to be solved when the range is small, such as low correction authority and trajectory bending. Guidance law design for this mortar is detailed. Different guidance laws were designed for the ascending and descending segments, respectively. By taking variable parameter guidance law in the vertical plane and using compensation in the lateral plane, the problems mentioned above were resolved. Roll angle resolving algorithms with geomagnetic measurements were demonstrated and the experiment results proved to be effective. In order to verify the effectiveness, Seven-Degrees-of-Freedom (7-DOF) rigid ballistic model were established and hardware in the loop simulation was introduced. After the transform function of the actuator was obtained, the control model of the shell was improved. The results of the Monte Carlo simulation demonstrate that the guidance law is suitable and the mortar can be effectively controlled.

[1]  Eric Gagnon,et al.  Course Correction Fuze Concept Analysis for In-Service 155 mm Spin-Stabilized Gunnery Projectiles , 2008 .

[2]  Mark F Costello.  Modeling and Simulation of a Differential Roll Projectile , 1998 .

[3]  Mark Costello,et al.  Flight mechanics of a novel guided spin-stabilized projectile concept , 2012 .

[4]  Spilios Theodoulis,et al.  Modelling and Stability Analysis for a Class of 155 mm Spin-stabilized Projectiles with Course Correction Fuse (CCF) , 2011 .

[5]  Yuri B. Shtessel,et al.  Trajectory-Shaping and Precision Guidance of a Spinning Mortar without Angle-State Feedback , 2011 .

[6]  Jerry A. Ray,et al.  Hardware-in-the-loop support of the Longbow/HELLFIRE modular missile systems preplanned product improvement program , 2001, SPIE Defense + Commercial Sensing.

[7]  Redstone Arsenal,et al.  ROLL ISOLATION BEARING DESIGN AND TESTING FOR LOW COST PRECISION KILL MISSILE SYSTEM , 1998 .

[8]  Ma Bao-hua.  Fuze in Networked Technology Era , 2006 .

[9]  Mark Costello,et al.  Simplified Projectile Swerve Solution for General Control Inputs , 2008 .

[10]  G. Schmidt,et al.  Inertial sensor technology trends , 2001 .

[11]  Spilios Theodoulis,et al.  Guidance and Control Design for a Class of Spin-Stabilized Fin-Controlled Projectiles , 2013 .

[12]  Mark Costello,et al.  Impact point model predictive control of a spin-stabilized projectile with instability protection , 2013 .

[13]  Mark Costello,et al.  Linear Theory of a Dual-Spin Projectile in Atmospheric Flight , 2000 .

[14]  Frank Fresconi,et al.  Control mechanism strategies for spin-stabilized projectiles , 2009 .