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🧹 Cleans up gait code

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This commit is contained in:
Rune Harlyk
2024-08-01 16:26:43 +02:00
committed by Rune Harlyk
parent 8a7bbb90d7
commit 5d9343989b
3 changed files with 24 additions and 177 deletions
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app/src/lib/kinematic.ts
+11 -157
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@@ -29,7 +29,7 @@ export interface target_position {
yaw: number;
}
const { cos, sin, atan2, sqrt, acos } = Math;
const { cos, sin, atan2, sqrt } = Math;
const DEG2RAD = 0.017453292519943;
@@ -326,23 +326,6 @@ export default class Kinematic {
}
}
const swing_time = 0.36;
const overlap_time = 0.0;
const dt = 0.02;
const swing_ticks = Math.round(swing_time / dt);
const num_phases = 4;
const stance_ticks = 7 * swing_ticks;
const overlap_ticks = Math.round(overlap_time / dt);
const phase_ticks = new Array(4).fill(swing_ticks);
const phase_length = num_phases * swing_ticks;
let rb_contact_phases = [1, 0, 1, 1];
let rf_contact_phases = [1, 1, 1, 0];
let lf_contact_phases = [1, 0, 1, 1];
let lb_contact_phases = [1, 1, 1, 0];
export class Command {
public x_vel_cmd_mps = 0;
public y_vel_cmd_mps = 0;
@@ -486,145 +469,13 @@ export class TrotState extends GaitState {
}
}
const smnc = {
alpha: 0.5,
beta: 0.5,
foot_height_time_constant: 0.02,
z_clearance: 0.05
};
export class GaitPlanner {
gaitCycleDuration = 10;
time = 0;
stepHeight = 30;
stepLength = 75;
num_phases = 4;
gaitCycle = 10;
phaseOffset = Math.PI;
ticks_ = 0;
phase_index_ = 0;
subphase_ticks_ = 0;
contact_feet_states_ = [false, false, false, false];
default_stance_feet_pos: number[][];
private phase: number;
private strideLength: number;
private height: number;
private cyclePeriod: number;
contact_feet_states: {
right_back_in_swing: boolean;
right_front_in_swing: boolean;
left_front_in_swing: boolean;
left_back_in_swing: boolean;
};
constructor() {
let l1 = 50;
let l2 = 20;
let l3 = 120;
let l4 = 155;
let L = 140;
let W = 75;
this.default_stance_feet_pos = [
[100, -100, 100, 1],
[100, -100, -100, 1],
[-W, -100, 100, 1],
[-W, -100, -100, 1]
];
this.strideLength = 2;
this.height = 50;
this.cyclePeriod = 10;
this.phase = 0;
this.contact_feet_states = {
right_back_in_swing: false,
right_front_in_swing: false,
left_front_in_swing: false,
left_back_in_swing: false
};
}
public step(bodyState: body_state_t, dt: number) {
this.updatePhase(dt);
this.updateFootPosition(bodyState);
// this.UpdateBodyShift(bodyState);
this.ticks_ += 1;
}
updatePhase(dt: number) {
const phase_time = this.ticks_ % phase_length;
let phase_sum = 0;
for (let i = 0; i < num_phases; i++) {
phase_sum += phase_ticks[i];
if (phase_time < phase_sum) {
this.phase_index_ = i;
this.subphase_ticks_ = phase_time - phase_sum + phase_ticks[i];
break;
}
}
this.contact_feet_states.right_back_in_swing = rb_contact_phases[this.phase_index_] === 0;
this.contact_feet_states.right_front_in_swing = rf_contact_phases[this.phase_index_] === 0;
this.contact_feet_states.left_front_in_swing = lf_contact_phases[this.phase_index_] === 0;
this.contact_feet_states.left_back_in_swing = lb_contact_phases[this.phase_index_] === 0;
}
updateFootPosition(body_state: body_state_t) {
const contacts = [
this.contact_feet_states.right_back_in_swing,
this.contact_feet_states.right_front_in_swing,
this.contact_feet_states.left_front_in_swing,
this.contact_feet_states.left_back_in_swing
];
for (let i = 0; i < 4; i++) {
let contact_mode = contacts[i];
contact_mode
? this.stanceController(body_state.feet[i])
: this.swingLegController(body_state.feet[i], this.default_stance_feet_pos[i]);
}
}
UpdateBodyShift(bodyState: body_state_t) {}
stanceController(foot_pos: number[]) {
const dt = 0.2;
const h_tau = 0.2;
const delta_pos = [-1 * dt, (1.0 / h_tau) * (0.0 - foot_pos[1]) * dt, -0 * dt];
const new_foot_pos = [
foot_pos[0] + delta_pos[0],
foot_pos[1] + delta_pos[1],
foot_pos[2] + delta_pos[2]
];
const yaw_angle = 0 * dt;
const cos_yaw = Math.cos(yaw_angle);
const sin_yaw = Math.sin(yaw_angle);
const rotated_x = cos_yaw * new_foot_pos[0] - sin_yaw * new_foot_pos[2];
const rotated_z = sin_yaw * new_foot_pos[0] + cos_yaw * new_foot_pos[2];
foot_pos[0] = rotated_x;
foot_pos[1] = new_foot_pos[1];
foot_pos[2] = rotated_z;
}
swingLegController(foot_pos: number[], default_stance_foot_pos: number[]) {}
}
export class BezierGaitPlanner {
export class PhaseGaitPlanner {
private tick = 0;
private phase = 0;
private phase_time = 0;
private total_phases_length = 60;
private num_phases = 4;
private phase_length = this.total_phases_length / num_phases;
private phase_length = this.total_phases_length / this.num_phases;
private sub_phase_tick = 0;
private _frame: number[][];
@@ -721,11 +572,13 @@ export class BezierGaitPlanner {
const delta_pos = [this.gait_state.step_x * this.dt, 0, this.gait_state.step_z * this.dt];
if (this.gait_state.step_x == 0) {
delta_pos[0] = (this.default_feet_pos[index][0] - this.body_state.feet[index][0]) * dt * 8;
delta_pos[0] =
(this.default_feet_pos[index][0] - this.body_state.feet[index][0]) * this.dt * 8;
}
if (this.gait_state.step_z == 0) {
delta_pos[2] = (this.default_feet_pos[index][2] - this.body_state.feet[index][2]) * dt * 8;
delta_pos[2] =
(this.default_feet_pos[index][2] - this.body_state.feet[index][2]) * this.dt * 8;
}
this.body_state.feet[index][0] = this.body_state.feet[index][0] + delta_pos[0];
@@ -735,6 +588,7 @@ export class BezierGaitPlanner {
this.body_state.feet[index][2] = this.body_state.feet[index][2] + delta_pos[2];
return this.body_state.feet[index];
}
private static solve_bin_factor(n: number, k: number): number {
return Number(this.factorial(n) / (this.factorial(k) * this.factorial(n - k)));
}
@@ -742,7 +596,7 @@ export class BezierGaitPlanner {
private bezier_curve(t: number, k: number, point: number): number {
const n = 11;
return (
point * BezierGaitPlanner.solve_bin_factor(n, k) * Math.pow(t, k) * Math.pow(1 - t, n - k)
point * PhaseGaitPlanner.solve_bin_factor(n, k) * Math.pow(t, k) * Math.pow(1 - t, n - k)
);
}
@@ -805,12 +659,12 @@ export class BezierGaitPlanner {
let stepX_long, stepY_long, stepZ_long, stepX_rot, stepY_rot, stepZ_rot;
if (phi <= this.step_offset) {
const phi_stance = phi / this.step_offset;
[stepX_long, stepY_long, stepZ_long] = BezierGaitPlanner.calculate_stance(
[stepX_long, stepY_long, stepZ_long] = PhaseGaitPlanner.calculate_stance(
phi_stance,
v,
angle
);
[stepX_rot, stepY_rot, stepZ_rot] = BezierGaitPlanner.calculate_stance(
[stepX_rot, stepY_rot, stepZ_rot] = PhaseGaitPlanner.calculate_stance(
phi_stance,
w_rot,
circle_trajectory