The Experts below are selected from a list of 22374 Experts worldwide ranked by ideXlab platform
Sanjay E. Talole - One of the best experts on this subject based on the ideXlab platform.
-
Continuous-Time Predictive Control-Based Integrated Guidance and Control
Journal of Guidance Control and Dynamics, 2017Co-Authors: Bhavnesh Panchal, Nilesh Mate, Sanjay E. TaloleAbstract:In this paper, a continuous-time predictive control-based novel integrated guidance and control formulation is proposed. Treating the Target Acceleration as a mismatched external disturbance, it is...
-
Sliding Mode and Inertial Delay Control Based Missile Guidance
IEEE Transactions on Aerospace and Electronic Systems, 2012Co-Authors: Shrivijay B. Phadke, Sanjay E. TaloleAbstract:A novel formulation of sliding mode control (SMC) based proportional navigation (PN) guidance law is presented. Unlike conventional SMC-based guidance laws, the law presented here does not need any knowledge of bounds of Target Acceleration. The Target Acceleration is estimated using the so-called inertial delay control (IDC). Closed-loop stability for the guidance loop is established. Simulations are carried out by considering highly-maneuvering Targets and constant as well as varying missile velocity and the results are presented to demonstrate the effectiveness of the proposed formulation.
-
Proportional navigation guidance using predictive and time delay control
Control Engineering Practice, 2006Co-Authors: Sanjay E. Talole, A. Ghosh, Shrivijay B. PhadkeAbstract:A new formulation of the proportional navigation guidance law using the continuous time nonlinear predictive control approach is proposed. The guidance law needs information about the Target Acceleration for its implementation, which is generally not available. In this paper, this problem is addressed by estimating the Target Acceleration using the time delay control (TDC). The effectiveness of the guidance law and the estimation of the Target Acceleration is demonstrated by simulation in a realistic scenario against a highly maneuvering Target.
-
Predictive Homing Guidance using Time Delay Control
AIAA Guidance Navigation and Control Conference and Exhibit, 2005Co-Authors: Sanjay E. Talole, S Phadke, R SinghAbstract:A new formulation of an optimal homing guidance law for tactical missiles using the continuous time nonlinear predictive control approach is proposed. It is shown that this new formulation retains the advantages of guidance law obtained through feedback linearization while overcoming its drawbacks. The guidance law thus obtained needs information about Target Acceleration for its implementation. To address this issue, we propose a novel approach based on the time delay control to estimate the Target Acceleration. A fading memory filter is employed to filter the measurement noise and to estimate the higher order derivative of the range as required in the time delay control. Simulations show that the time delay control based approach indeed provides an accurate and efficient estimate of the Target Acceleration. Simulations are carried out to assess the performance of this guidance law in comparison with the conventional PN guidance against highly maneuvering Target. The results show that the performance of the present formulation is superior to that of PN guidance.
Shrivijay B. Phadke - One of the best experts on this subject based on the ideXlab platform.
-
Sliding Mode and Inertial Delay Control Based Missile Guidance
IEEE Transactions on Aerospace and Electronic Systems, 2012Co-Authors: Shrivijay B. Phadke, Sanjay E. TaloleAbstract:A novel formulation of sliding mode control (SMC) based proportional navigation (PN) guidance law is presented. Unlike conventional SMC-based guidance laws, the law presented here does not need any knowledge of bounds of Target Acceleration. The Target Acceleration is estimated using the so-called inertial delay control (IDC). Closed-loop stability for the guidance loop is established. Simulations are carried out by considering highly-maneuvering Targets and constant as well as varying missile velocity and the results are presented to demonstrate the effectiveness of the proposed formulation.
-
Proportional navigation guidance using predictive and time delay control
Control Engineering Practice, 2006Co-Authors: Sanjay E. Talole, A. Ghosh, Shrivijay B. PhadkeAbstract:A new formulation of the proportional navigation guidance law using the continuous time nonlinear predictive control approach is proposed. The guidance law needs information about the Target Acceleration for its implementation, which is generally not available. In this paper, this problem is addressed by estimating the Target Acceleration using the time delay control (TDC). The effectiveness of the guidance law and the estimation of the Target Acceleration is demonstrated by simulation in a realistic scenario against a highly maneuvering Target.
Graham R. Barnes - One of the best experts on this subject based on the ideXlab platform.
-
Oculomotor prediction of accelerative Target motion during occlusion: long-term and short-term effects
Experimental Brain Research, 2010Co-Authors: Simon J. Bennett, Philippe Lefèvre, Jean-jacques Orban De Xivry, Graham R. BarnesAbstract:The present study examined the influence of long-term (i.e., between-trial) and short-term (i.e., within-trial) predictive mechanisms on ocular pursuit during transient occlusion. To this end, we compared ocular pursuit of accelerative and decelerative Target motion in trials that were presented in random or blocked-order. Catch trials in which Target Acceleration was unexpectedly modified were randomly interleaved in blocked-order trials. Irrespective of trial order, eye velocity decayed following Target occlusion and then recovered towards the different levels of Target velocity at reappearance. However, the recovery was better scaled in blocked-order trials than random-order trials. In blocked-order trials only, the reduced gain of smooth pursuit during occlusion was compensated by a change in saccade amplitude and resulted in total eye displacement (TED) that was well matched to Target displacement. Subsidiary analysis indicated that three repeats of blocked-order trials was sufficient for participants to modify eye displacement compared to that exhibited in random-order trials, although more trials were required before end-occlusion eye velocity was better scaled. Finally, we found that participants exhibited evidence of a scaled response to an unexpected change in Target Acceleration (i.e., catch trials), although there were also transfer effects from the preceding blocked-order trials. These findings are consistent with the suggestion that on-the-fly prediction (short-term effect) is combined with memorised information from previous trials (long-term effect) to generate a persistent and veridical prediction of occluded Target motion.
-
Oculomotor prediction of accelerative Target motion during occlusion: long-term and short-term effects
Experimental Brain Research, 2010Co-Authors: Simon J. Bennett, Philippe Lefèvre, Jean-jacques Orban De Xivry, Graham R. BarnesAbstract:The present study examined the influence of long-term (i.e., between-trial) and short-term (i.e., within-trial) predictive mechanisms on ocular pursuit during transient occlusion. To this end, we compared ocular pursuit of accelerative and decelerative Target motion in trials that were presented in random or blocked-order. Catch trials in which Target Acceleration was unexpectedly modified were randomly interleaved in blocked-order trials. Irrespective of trial order, eye velocity decayed following Target occlusion and then recovered towards the different levels of Target velocity at reappearance. However, the recovery was better scaled in blocked-order trials than random-order trials. In blocked-order trials only, the reduced gain of smooth pursuit during occlusion was compensated by a change in saccade amplitude and resulted in total eye displacement (TED) that was well matched to Target displacement. Subsidiary analysis indicated that three repeats of blocked-order trials was sufficient for participants to modify eye displacement compared to that exhibited in random-order trials, although more trials were required before end-occlusion eye velocity was better scaled. Finally, we found that participants exhibited evidence of a scaled response to an unexpected change in Target Acceleration (i.e., catch trials), although there were also transfer effects from the preceding blocked-order trials. These findings are consistent with the suggestion that on-the-fly prediction (short-term effect) is combined with memorised information from previous trials (long-term effect) to generate a persistent and veridical prediction of occluded Target motion.
-
Target Acceleration can be extracted and represented within the predictive drive to ocular pursuit
Journal of neurophysiology, 2007Co-Authors: Simon J. Bennett, Jean-jacques Orban De Xivry, Graham R. Barnes, Philippe LefèvreAbstract:Given sufficient exposure to stimulus presentation, the oculomotor system generates a representation of the stimulus characteristics, which is then used to predict the upcoming Target motion. In addition to compensating for the perceptual-motor delay, these predictive processes perpetuate eye motion during a transient occlusion and compensate for the loss of visual input. At present, however, it is not well understood whether and how the oculomotor system extracts and represents Target Acceleration for subsequent predictive control. To this end, we used a Target occlusion paradigm where both position and velocity of the Target during the occlusion and at reappearance could not be predicted without extracting Target Acceleration before Target disappearance. We found that the oculomotor response during the blanking period was not influenced by Target Acceleration when the initial exposure was 200 ms. However, smooth and saccadic eye movements did discriminate between the different levels of Acceleration after an initial 500- or 800-ms exposure. In the event that the smooth response during the occlusion did not match well the Target trajectory and thus eliminate a developing displacement error, there was an increased saccadic displacement. Still, the combined response during the blanking period did not eliminate retinal slip and position error at Target reappearance. These results indicate that information on Target Acceleration can be extracted on-line, during pursuit of a visible ramp, and then used to drive a predictive oculomotor response in the absence of visual input.
Taek Lyul Song - One of the best experts on this subject based on the ideXlab platform.
-
Input estimation with multiple model for maneuvering Target tracking
Control Engineering Practice, 2002Co-Authors: Sang Jin Shin, Taek Lyul SongAbstract:Abstract To increase the performance of maneuvering Target tracking, an algorithm utilizing input estimation with multiple model based on two independent mode sets is suggested in this paper. The proposed algorithm consists of hypothesized multiple filters to estimate the unknown Target Acceleration and a test statistic developed from a modified version of the generalized likelihood ratio test to detect the maneuver onset time. An efficient algorithm for the Target Acceleration estimation is derived to reduce the computational burden of multiple model estimation. A numerical analysis is carried out to obtain the proper window length and the average delay of the algorithm. Performance of the proposed algorithm is evaluated by a series of simulation runs.
Philippe Lefèvre - One of the best experts on this subject based on the ideXlab platform.
-
Oculomotor prediction of accelerative Target motion during occlusion: long-term and short-term effects
Experimental Brain Research, 2010Co-Authors: Simon J. Bennett, Philippe Lefèvre, Jean-jacques Orban De Xivry, Graham R. BarnesAbstract:The present study examined the influence of long-term (i.e., between-trial) and short-term (i.e., within-trial) predictive mechanisms on ocular pursuit during transient occlusion. To this end, we compared ocular pursuit of accelerative and decelerative Target motion in trials that were presented in random or blocked-order. Catch trials in which Target Acceleration was unexpectedly modified were randomly interleaved in blocked-order trials. Irrespective of trial order, eye velocity decayed following Target occlusion and then recovered towards the different levels of Target velocity at reappearance. However, the recovery was better scaled in blocked-order trials than random-order trials. In blocked-order trials only, the reduced gain of smooth pursuit during occlusion was compensated by a change in saccade amplitude and resulted in total eye displacement (TED) that was well matched to Target displacement. Subsidiary analysis indicated that three repeats of blocked-order trials was sufficient for participants to modify eye displacement compared to that exhibited in random-order trials, although more trials were required before end-occlusion eye velocity was better scaled. Finally, we found that participants exhibited evidence of a scaled response to an unexpected change in Target Acceleration (i.e., catch trials), although there were also transfer effects from the preceding blocked-order trials. These findings are consistent with the suggestion that on-the-fly prediction (short-term effect) is combined with memorised information from previous trials (long-term effect) to generate a persistent and veridical prediction of occluded Target motion.
-
Oculomotor prediction of accelerative Target motion during occlusion: long-term and short-term effects
Experimental Brain Research, 2010Co-Authors: Simon J. Bennett, Philippe Lefèvre, Jean-jacques Orban De Xivry, Graham R. BarnesAbstract:The present study examined the influence of long-term (i.e., between-trial) and short-term (i.e., within-trial) predictive mechanisms on ocular pursuit during transient occlusion. To this end, we compared ocular pursuit of accelerative and decelerative Target motion in trials that were presented in random or blocked-order. Catch trials in which Target Acceleration was unexpectedly modified were randomly interleaved in blocked-order trials. Irrespective of trial order, eye velocity decayed following Target occlusion and then recovered towards the different levels of Target velocity at reappearance. However, the recovery was better scaled in blocked-order trials than random-order trials. In blocked-order trials only, the reduced gain of smooth pursuit during occlusion was compensated by a change in saccade amplitude and resulted in total eye displacement (TED) that was well matched to Target displacement. Subsidiary analysis indicated that three repeats of blocked-order trials was sufficient for participants to modify eye displacement compared to that exhibited in random-order trials, although more trials were required before end-occlusion eye velocity was better scaled. Finally, we found that participants exhibited evidence of a scaled response to an unexpected change in Target Acceleration (i.e., catch trials), although there were also transfer effects from the preceding blocked-order trials. These findings are consistent with the suggestion that on-the-fly prediction (short-term effect) is combined with memorised information from previous trials (long-term effect) to generate a persistent and veridical prediction of occluded Target motion.
-
Target Acceleration can be extracted and represented within the predictive drive to ocular pursuit
Journal of neurophysiology, 2007Co-Authors: Simon J. Bennett, Jean-jacques Orban De Xivry, Graham R. Barnes, Philippe LefèvreAbstract:Given sufficient exposure to stimulus presentation, the oculomotor system generates a representation of the stimulus characteristics, which is then used to predict the upcoming Target motion. In addition to compensating for the perceptual-motor delay, these predictive processes perpetuate eye motion during a transient occlusion and compensate for the loss of visual input. At present, however, it is not well understood whether and how the oculomotor system extracts and represents Target Acceleration for subsequent predictive control. To this end, we used a Target occlusion paradigm where both position and velocity of the Target during the occlusion and at reappearance could not be predicted without extracting Target Acceleration before Target disappearance. We found that the oculomotor response during the blanking period was not influenced by Target Acceleration when the initial exposure was 200 ms. However, smooth and saccadic eye movements did discriminate between the different levels of Acceleration after an initial 500- or 800-ms exposure. In the event that the smooth response during the occlusion did not match well the Target trajectory and thus eliminate a developing displacement error, there was an increased saccadic displacement. Still, the combined response during the blanking period did not eliminate retinal slip and position error at Target reappearance. These results indicate that information on Target Acceleration can be extracted on-line, during pursuit of a visible ramp, and then used to drive a predictive oculomotor response in the absence of visual input.