Autonomous Trajectory Planning and Guidance Control for Launch Vehicles - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Autonomous Trajectory Planning and Guidance Control for Launch Vehicles write by Zhengyu Song. This book was released on 2023-04-15. Autonomous Trajectory Planning and Guidance Control for Launch Vehicles available in PDF, EPUB and Kindle. This open access book highlights the autonomous and intelligent flight control of future launch vehicles for improving flight autonomy to plan ascent and descent trajectories onboard, and autonomously handle unexpected events or failures during the flight. Since the beginning of the twenty-first century, space launch activities worldwide have grown vigorously. Meanwhile, commercial launches also account for the booming trend. Unfortunately, the risk of space launches still exists and is gradually increasing in line with the rapidly rising launch activities and commercial rockets. In the history of space launches, propulsion and control systems are the two main contributors to launch failures. With the development of information technologies, the increase of the functional density of hardware products, the application of redundant or fault-tolerant solutions, and the improvement of the testability of avionics, the launch losses caused by control systems exhibit a downward trend, and the failures induced by propulsion systems become the focus of attention. Under these failures, the autonomous planning and guidance control may save the missions. This book focuses on the latest progress of relevant projects and academic studies of autonomous guidance, especially on some advanced methods which can be potentially real-time implemented in the future control system of launch vehicles. In Chapter 1, the prospect and technical challenges are summarized by reviewing the development of launch vehicles. Chapters 2 to 4 mainly focus on the flight in the ascent phase, in which the autonomous guidance is mainly reflected in the online planning. Chapters 5 and 6 mainly discuss the powered descent guidance technologies. Finally, since aerodynamic uncertainties exert a significant impact on the performance of the ascent / landing guidance control systems, the estimation of aerodynamic parameters, which are helpful to improve flight autonomy, is discussed in Chapter 7. The book serves as a valuable reference for researchers and engineers working on launch vehicles. It is also a timely source of information for graduate students interested in the subject.
Onboard Trajectory Generation for the Unpowered Landing of Autonomous Reusable Launch Vehicles
Onboard Trajectory Generation for the Unpowered Landing of Autonomous Reusable Launch Vehicles - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Onboard Trajectory Generation for the Unpowered Landing of Autonomous Reusable Launch Vehicles write by André René Girerd. This book was released on 2001. Onboard Trajectory Generation for the Unpowered Landing of Autonomous Reusable Launch Vehicles available in PDF, EPUB and Kindle.
Optimal Trajectory Reconfiguration and Retargeting for a Reusable Launch Vehicle
Optimal Trajectory Reconfiguration and Retargeting for a Reusable Launch Vehicle - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Optimal Trajectory Reconfiguration and Retargeting for a Reusable Launch Vehicle write by . This book was released on 2005. Optimal Trajectory Reconfiguration and Retargeting for a Reusable Launch Vehicle available in PDF, EPUB and Kindle. Autonomous reusable launch vehicles (RLV) are being pursued as low-cost alternatives to expendable launch vehicles and the Shuttle. The employment of autonomous reusable launch vehicles requires additional guidance and control robustness to fulfill the role of an adaptive human pilot, in the event of failures or unanticipated conditions. The guidance and control of these vehicles mandate new guidance strategies that are able to identify and adapt to vehicle failures during the flight and still return to earth safely. This work utilizes an online trim algorithm that provides the outer loop with the feasible range of Mach number and angle of attack, for which the vehicle can be rotationally trimmed. The algorithm allows one to include 6-degree-of-freedom (DOF) trim effects and constraints in a reduced order dynamical model which is used in the solution of an optimal control problem. A direct pseudospectral method is used to solve a two-point-boundary-value problem which determines the optimal entry trajectory subject to appropriate constraints such as normal load, dynamic pressure limits, heat load limits, and state dependent constraints.
Flight Test Results of an Adaptive Guidance System for Reusable Launch Vehicles
Flight Test Results of an Adaptive Guidance System for Reusable Launch Vehicles - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Flight Test Results of an Adaptive Guidance System for Reusable Launch Vehicles write by John D. Schierman. This book was released on 2004. Flight Test Results of an Adaptive Guidance System for Reusable Launch Vehicles available in PDF, EPUB and Kindle. To enable autonomous operations in future Reusable Launch Vehicles (RLVs), reconfigurable control and adaptive guidance will often be required to facilitate recovery of the mission following a major anomalous event such as an effector failure. An adaptive guidance system that works in conjunction with a reconfigurable controller and an autonomous trajectory command reshaping algorithm is presented. The guidance law utilizes a backstepping architecture to generate pitch rate commands that drive the inner-loop control system. Under extreme failure conditions the control surfaces can saturate in an attempt to meet commanded moments. In these cases, the guidance feedback gains are reduced to preserve stability margins in the guidance loops. A case study is presented that shows the benefits of the guidance gain adaptation. Without adjusting the gains, the guidance loops go unstable, whereas stability is maintained with gain reduction.
Entry Guidance and Trajectory Control for Re-usable Launch Vehicles
Entry Guidance and Trajectory Control for Re-usable Launch Vehicles - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Entry Guidance and Trajectory Control for Re-usable Launch Vehicles write by Ping Lu. This book was released on 1996. Entry Guidance and Trajectory Control for Re-usable Launch Vehicles available in PDF, EPUB and Kindle.
