本系列论文在势场论框架中提出一个统一的物理机制,解释从天体力学到宇宙学的广泛现象。核心思想是:延展物体在引力场中运动时,内部产生动势梯度,与引力势梯度相互对抗。圆周运动中,两者一阶完全抵消,等势面形成;高阶不抵消,产生残余势差——这一残余是进动、潮汐力、自转演化、盘状结构、引力辐射乃至地球微震动的共同物理源头。 六篇论文的分工如下:(1)等势面的形成机制——动势与引力势的抵消原理及其物理后果;(2)盘状系统中的势差节点——从行星环间隙到行星间距的统一解释;(3)最小势差原理与天体演化——自转-轨道共振、脉冲星减慢与内部约束耗散;(4)致密天体的等势面几何——从并合、无毛到喷流的统一解释;(5)残余势差的可观测宇宙——从轨道进动微细结构到宇宙引力波背景;(6)地球26秒心跳的势场论解释——等势面滑行偏差与晨侧触发的周期性释放。 全部论文仅从三个势(引力势、动势、约束势)出发,不需要调用广义相对论场方程,不需要为不同现象引入不同的物理机制。框架给出可检验的定量预言,涵盖从太阳系到宇宙学尺度的多重观测窗口。 --- This series of papers proposes a unified physical mechanism within the framework of Potential Field Theory, explaining a wide range of phenomena from celestial mechanics to cosmology. The core idea: when an extended body moves in a gravitational field, a motional potential gradient arises internally, opposing the gravitational potential gradient. In circular motion, the first-order terms cancel exactly—an equipotential surface forms. Higher-order terms do not cancel, leaving a residual potential difference. This residual is the common physical origin of precession, tidal forces, spin evolution, disk structures, gravitational radiation, and even Earth's microseisms. The six papers are organized as follows: (1) The formation mechanism of equipotential surfaces—the cancellation principle between motional and gravitational potentials and its physical consequences; (2) Potential difference nodes in disk systems—a unified explanation from planetary ring gaps to planetary spacing; (3) The principle of minimum potential difference and celestial evolution—spin-orbit resonance, pulsar spin-down, and internal constraint dissipation; (4) Equipotential geometry of compact objects—a unified explanation of merger, no-hair, and jets; (5) The observable universe of residual potential difference—from fine structure of orbital precession to the cosmic gravitational wave background; (6) A Potential Field Theory explanation of Earth's 26-second heartbeat—periodic release triggered by deviation from equipotential gliding on the dawn side. All papers proceed from only three potentials (gravitational, motional, and constraint), without invoking the field equations of general relativity or introducing different physical mechanisms for different phenomena. The framework yields testable quantitative predictions across multiple observational windows, from the Solar System to cosmological scales.