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| Proporcionalna navigacija× | Kvaternionska orijentacija× | |
|---|---|---|
| Područje | Zrakoplovstvo i svemir | Zrakoplovstvo i svemir |
| Obitelj | Process / pipeline | Process / pipeline |
| Godina nastanka≠ | 1957 | 1843 |
| Tvorac≠ | Lin-Hsiung Chu | William Hamilton (quaternions), aerospace engineers |
| Vrsta≠ | Guidance law | Mathematical framework |
| Temeljni izvor≠ | Knox, W. P. (1971). On optimal proportional navigation. IEEE Transactions on Aerospace and Electronic Systems, AES-7(3), 417–426. link ↗ | Shuster, M. D. (1993). A survey of attitude representations. Journal of the Astronautical Sciences, 41(4), 439–517. link ↗ |
| Drugi nazivi≠ | PN, PN law | quaternion representation, attitude kinematics, q-vector |
| Srodne | 3 | 3 |
| Sažetak≠ | Proportional Navigation (PN) is a guidance law that generates command accelerations proportional to the rate of change of the line-of-sight angle between a pursuer and target. Introduced by Lin-Hsiung Chu in the 1950s, it became the foundation of modern missile guidance systems. PN solves the pursuit-evasion problem by ensuring that the pursuer intercepts a moving target with minimal computational overhead. | Quaternion attitude representation is a mathematical framework for describing three-dimensional rotations using four-dimensional vectors (quaternions). Superior to Euler angles due to the absence of singularities (gimbal lock), quaternions are the standard representation in modern attitude estimation, spacecraft control, and 3D computer graphics. Quaternion kinematics elegantly expresses how attitude evolves under angular velocity measurements from gyroscopes. |
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